Update extension docs

* wip: Modernize dependencies, syntax, imports

* Use final release of ava-nock v2

* Update Travis config

* Remove Node 13 from test matrix

* Replace errorClass with parseErrorMessage in subclasses

* define exports, apply updated lint rules

* Remove markdown eslint plugin

* Update README

* v9.0.0-beta.1

* Add gql tag to exports

* v9.0.0-beta.2

* Bump ava-nock, add test

* Update dataloader loadMany usage

* Add modules note to README

* Add retry option to got calls

.babelrc

@@ -1,19 +0,0 @@
-{
-  "presets": [
-    [
-      "env",
-      {
-        "targets": {
-          "node": "8.10"
-        }
-      }
-    ]
-  ],
-  "plugins": ["transform-runtime", "syntax-object-rest-spread"],
-  "only": ["scripts/**", "src/**", "test/helpers/**"],
-  "env": {
-    "test": {
-      "plugins": ["istanbul"]
-    }
-  }
-}

.eslintignore

@@ -1,4 +1,4 @@
 /.nyc_output
 /coverage
 /lib
-!.eslintrc.js
+!.eslintrc.cjs

.eslintrc.cjs

@@ -0,0 +1,45 @@
+module.exports = {
+  env: {
+    es2020: true,
+    node: true,
+  },
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: 'module',
+  },
+  extends: [
+    'eslint:recommended',
+    'plugin:promise/recommended',
+    'plugin:node/recommended',
+    'plugin:import/errors',
+    'plugin:import/warnings',
+    'plugin:prettier/recommended',
+  ],
+  rules: {
+    'no-unused-vars': [
+      'error',
+      { vars: 'all', args: 'none', ignoreRestSiblings: false },
+    ],
+    'import/default': 'off',
+    'import/no-named-as-default': 'off',
+    'node/no-unsupported-features/es-syntax': [
+      'error',
+      {
+        ignores: ['dynamicImport', 'modules'],
+      },
+    ],
+    'prettier/prettier': [
+      'error',
+      {
+        singleQuote: true,
+      },
+    ],
+    'promise/always-return': 'off',
+    'promise/catch-or-return': [
+      'error',
+      {
+        allowThen: true,
+      },
+    ],
+  },
+};

.eslintrc.js

@@ -1,20 +0,0 @@
-module.exports = {
-  extends: ['standard', 'prettier', 'prettier/standard'],
-  env: {
-    es6: true,
-    node: true
-  },
-  parserOptions: {
-    ecmaVersion: 6
-  },
-  plugins: ['prettier'],
-  rules: {
-    'prettier/prettier': [
-      'error',
-      {
-        singleQuote: true,
-        semi: false
-      }
-    ]
-  }
-}

.prettierignore

@@ -0,0 +1,3 @@
+/.nyc_output
+/coverage
+/lib

.travis.yml

@@ -1,26 +1,26 @@
 language: node_js
 
 node_js:
-- '8'
-- '9'
-- '10'
+  - '12'
+  - '14'
+  - '15'
 
 # Use container-based Travis infrastructure.
 sudo: false
 
 branches:
   only:
-  - master
-  - "/^greenkeeper/.*$/"
+    - master
+    - '/^greenkeeper/.*$/'
 
 env:
   global:
-  - secure: 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
-  - secure: gS7EN+j/l9SDLjwM9YHCgOh6iPw0YTKvuQX9eXUI9YIEYoyhnBRQMfp77LJTuXdlucGgYj4v05YriLoxl4L7hmUmAKnDOVVEOUQqwYoAzg+h2GS3FQhoQRioxSAmTJc90nki0uhYAHW8FZ34+BjONCDSnew7r71TTU+UxRdRu4wOneFwXW1crPCNRtO5Ov/gkuiOWQaSPOoP6tzPOMP6FUueRQVqvf2GOoF3lBM8LnKeIq+m4H80DGsNjMtqdPJz9QQzAwO3VRNgsMAgr2wzVzjUnum7DfQC808AQDURlj9apg1HdYZDJH9bQyI/jIZ1gnHIcZ+kqqoq0l0QVNmITeMGrblFALU8xCFtGUyq70FGMjcmDGCanpveNOOhxjdqqfvvPKuqHEsfZtZkBJDovJdFtKmzf7DWb5xv8liPCzX26eBG/DPQgCEzyW0bl7IcB2LVMW/ObMRgixik2qiqYjN05pveWYsiO2iaiMo9ebm7FHXw/B0yfjM+CCGf7bjR9+RczXlN1x/gj+yjnYJ4K/nojSx0wms3QE7tJsXjmAMeguKUoZtaGGlF5yGbKtaZEVw/ZhYQDfLwwHQX2S5E424tYP/NAdi++CNCvyHJ7n0zel18FfsUNE1jIMaGb6aG6uOv6eOVI4+O09R71wxcYbQs40axdF+Y0A5f+CllNc8=
+    - secure: fyw/6iyz4skp/sdAb9wr9Pq/72j4z2TiIZIJLT6B4zZZUKclA9ihHYx2Qf4IK7rHe+mvg0dSKaJi+zgrEx04fg2bP05dV1f52mmR71sE/FDRc9nkGgDl6/2AeXfXh0Raf8lVsYuBWclI2G0GPQeG1xskY7EBEnlKBdRmnljXPDNu1kwSrcLoGkoP1sIMRIxnMAHPXlOO3QKstiHM/HMa3A4SsQ4VGVLfrYqDJJ3L3XOkSbqyaSdWhELxSXAxSEzEOYi28kPeKtztdaU+BQtOSamuIMrEPwpM6+bFtTrf/SxWcybCk2sqn4sUgDVE8658cEIECR6NC1U/gWvDZSVHEetT2caHkhe1NRjxQmKrRfx88a+qZPeqbv6ydpvK8XAnaMtpwZtytoPZ7gw4IF0wxfkeBhK8dgBb4Lsdpnv90tbzcIyHgrHJiKBgJLlghBr9McFo4Fe3W06eD4rBTNX1LCmURQCm0V6mfCPUPup/68tAuscgysVW54XT51P4fk1iR3MJzCjbxaWbxwxWdCEeD2ptIkZwXDGydVe2qL4eI7NpYyTyhHc8vITlXYQnDCj9ztwjSiSf+4jJQiN7mbNcrRymnF22ICubnpj0SHBxEkQFJ+f/Wf3Ksxtl8t8DLTBCPtSzv7rxbdtnKRR1QRWgeYnhos1QHcNaoDgrlWCkOIg=
+    - secure: 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
 
 script:
-- yarn test
+  - yarn test
 
 after_success:
-- $(yarn bin)/nyc report --reporter=text-lcov | $(yarn bin)/coveralls
-- bash <(curl -s https://codecov.io/bash)
+  - $(yarn bin)/c8 report --reporter=text-lcov | $(yarn bin)/coveralls
+  - bash <(curl -s https://codecov.io/bash)

README.md

@@ -9,19 +9,31 @@ A [GraphQL][] schema, [Express][] server, and middleware for querying the
 [MusicBrainz][] API. It features an [extensible](./docs/extensions) schema to
 add integration with Discogs, Spotify, Last.fm, fanart.tv, and more!
 
+**[Try out the live demo!][demo]** :bulb: Use the “Docs” sidebar, the
+[schema][], or the [types][] docs to help construct your query.
+
+## Install
+
+Install with npm:
+
 ```sh
 npm install graphbrainz --save
 ```
 
-**[Try out the live demo!][demo]** :bulb: Use the “Docs” sidebar, the
-[schema][], or the [types][] docs to help construct your query.
+Install with Yarn:
+
+```sh
+yarn add graphbrainz
+```
+
+_GraphBrainz is written and distributed as native ECMAScript modules
+(ESM) and requires a compatible version of Node.js_
 
 ## Contents
 
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 
-
 - [Usage](#usage)
   - [As a standalone server](#as-a-standalone-server)
   - [As middleware](#as-middleware)
@@ -43,8 +55,8 @@ middleware supplying a GraphQL endpoint.
 
 ### As a standalone server
 
-Run the included `graphbrainz` executable to start the server. The server
-is configured using [environment variables](#environment-variables).
+Run the included `graphbrainz` executable to start the server. The server is
+configured using [environment variables](#environment-variables).
 
 ```sh
 $ graphbrainz
@@ -69,7 +81,7 @@ an endpoint, or you just want more customization, use the middleware.
 
 ```js
 import express from 'express';
-import graphbrainz from 'graphbrainz';
+import { middleware as graphbrainz } from 'graphbrainz';
 
 const app = express();
 
@@ -89,11 +101,11 @@ app.listen(3000);
 The `graphbrainz` middleware function accepts the following options:
 
 - **`client`**: A custom API client instance to use. See the
-  [client submodule](src/api/client.js) for help with creating a custom instance.
-  You probably only need to do this if you want to adjust the rate limit and retry
-  behavior.
-- Any remaining options are passed along to the standard GraphQL middleware.
-  See the [express-graphql][] documentation for more information.
+  [client submodule](src/api/client.js) for help with creating a custom
+  instance. You probably only need to do this if you want to adjust the rate
+  limit and retry behavior.
+- Any remaining options are passed along to the standard GraphQL middleware. See
+  the [express-graphql][] documentation for more information.
 
 ### As a client
 
@@ -103,13 +115,11 @@ or exposing a GraphQL endpoint, use the GraphBrainz schema with a library like
 GraphBrainz resolvers expect, like so:
 
 ```js
-import { graphql } from 'graphql'
-import { MusicBrainz } from 'graphbrainz/lib/api'
-import createContext from 'graphbrainz/lib/context'
-import schema from 'graphbrainz/lib/schema'
+import { graphql } from 'graphql';
+import { MusicBrainz, createContext, baseSchema } from 'graphbrainz';
 
-const client = new MusicBrainz()
-const context = createContext({ client })
+const client = new MusicBrainz();
+const context = createContext({ client });
 
 graphql(
   schema,
@@ -125,19 +135,20 @@ graphql(
   null,
   context
 )
-  .then(result => {
-    const { releaseGroup } = result.data.lookup
-    console.log(`The album title is “${releaseGroup.title}”.`)
-  })
-  .catch(err => {
-    console.error(err)
+  .then((result) => {
+    const { releaseGroup } = result.data.lookup;
+    console.log(`The album title is “${releaseGroup.title}”.`);
   })
+  .catch((err) => {
+    console.error(err);
+  });
 ```
 
 ### Environment Variables
 
 - **`MUSICBRAINZ_BASE_URL`**: The base MusicBrainz API URL to use. Change this
-  if you are running your own MusicBrainz mirror. Defaults to `http://musicbrainz.org/ws/2/`.
+  if you are running your own MusicBrainz mirror. Defaults to
+  `http://musicbrainz.org/ws/2/`.
 - **`GRAPHBRAINZ_PATH`**: The URL route at which to expose the GraphQL endpoint,
   if running the standalone server. Defaults to `/`.
 - **`GRAPHBRAINZ_CORS_ORIGIN`**: The value of the `origin` option to pass to the
@@ -176,7 +187,8 @@ See the [debug][] package for more information.
 
 ## Example Queries
 
-Nirvana albums and each album’s singles ([try it](<https://graphbrainz.herokuapp.com/?query=query%20NirvanaAlbumSingles%20%7B%0A%20%20lookup%20%7B%0A%20%20%20%20artist(mbid%3A%20%225b11f4ce-a62d-471e-81fc-a69a8278c7da%22)%20%7B%0A%20%20%20%20%20%20name%0A%20%20%20%20%20%20releaseGroups(type%3A%20ALBUM)%20%7B%0A%20%20%20%20%20%20%20%20edges%20%7B%0A%20%20%20%20%20%20%20%20%20%20node%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20title%0A%20%20%20%20%20%20%20%20%20%20%20%20firstReleaseDate%0A%20%20%20%20%20%20%20%20%20%20%20%20relationships%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20releaseGroups(type%3A%20%22single%20from%22)%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20edges%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20node%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20target%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20...%20on%20ReleaseGroup%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20title%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20firstReleaseDate%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A&operationName=NirvanaAlbumSingles>)):
+Nirvana albums and each album’s singles
+([try it](<https://graphbrainz.herokuapp.com/?query=query%20NirvanaAlbumSingles%20%7B%0A%20%20lookup%20%7B%0A%20%20%20%20artist(mbid%3A%20%225b11f4ce-a62d-471e-81fc-a69a8278c7da%22)%20%7B%0A%20%20%20%20%20%20name%0A%20%20%20%20%20%20releaseGroups(type%3A%20ALBUM)%20%7B%0A%20%20%20%20%20%20%20%20edges%20%7B%0A%20%20%20%20%20%20%20%20%20%20node%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20title%0A%20%20%20%20%20%20%20%20%20%20%20%20firstReleaseDate%0A%20%20%20%20%20%20%20%20%20%20%20%20relationships%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20releaseGroups(type%3A%20%22single%20from%22)%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20edges%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20node%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20target%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20...%20on%20ReleaseGroup%20%7B%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20title%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20firstReleaseDate%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A&operationName=NirvanaAlbumSingles>)):
 
 ```graphql
 query NirvanaAlbumSingles {
@@ -212,7 +224,8 @@ query NirvanaAlbumSingles {
 
 ### Pagination
 
-The first five labels with “Apple” in the name ([try it](<https://graphbrainz.herokuapp.com/?query=query%20AppleLabels%20%7B%0A%20%20search%20%7B%0A%20%20%20%20labels(query%3A%20%22Apple%22%2C%20first%3A%205)%20%7B%0A%20%20%20%20%20%20...labelResults%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A%0Afragment%20labelResults%20on%20LabelConnection%20%7B%0A%20%20pageInfo%20%7B%0A%20%20%20%20endCursor%0A%20%20%7D%0A%20%20edges%20%7B%0A%20%20%20%20cursor%0A%20%20%20%20node%20%7B%0A%20%20%20%20%20%20mbid%0A%20%20%20%20%20%20name%0A%20%20%20%20%20%20type%0A%20%20%20%20%20%20area%20%7B%0A%20%20%20%20%20%20%20%20name%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A&operationName=AppleLabels>)):
+The first five labels with “Apple” in the name
+([try it](<https://graphbrainz.herokuapp.com/?query=query%20AppleLabels%20%7B%0A%20%20search%20%7B%0A%20%20%20%20labels(query%3A%20%22Apple%22%2C%20first%3A%205)%20%7B%0A%20%20%20%20%20%20...labelResults%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A%0Afragment%20labelResults%20on%20LabelConnection%20%7B%0A%20%20pageInfo%20%7B%0A%20%20%20%20endCursor%0A%20%20%7D%0A%20%20edges%20%7B%0A%20%20%20%20cursor%0A%20%20%20%20node%20%7B%0A%20%20%20%20%20%20mbid%0A%20%20%20%20%20%20name%0A%20%20%20%20%20%20type%0A%20%20%20%20%20%20area%20%7B%0A%20%20%20%20%20%20%20%20name%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A&operationName=AppleLabels>)):
 
 ```graphql
 query AppleLabels {
@@ -241,7 +254,8 @@ fragment labelResults on LabelConnection {
 }
 ```
 
-…and the next five, using the `endCursor` from the previous result ([try it](<https://graphbrainz.herokuapp.com/?query=query%20AppleLabels%20%7B%0A%20%20search%20%7B%0A%20%20%20%20labels(query%3A%20%22Apple%22%2C%20first%3A%205%2C%20after%3A%20%22YXJyYXljb25uZWN0aW9uOjQ%3D%22)%20%7B%0A%20%20%20%20%20%20...labelResults%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A%0Afragment%20labelResults%20on%20LabelConnection%20%7B%0A%20%20pageInfo%20%7B%0A%20%20%20%20endCursor%0A%20%20%7D%0A%20%20edges%20%7B%0A%20%20%20%20cursor%0A%20%20%20%20node%20%7B%0A%20%20%20%20%20%20mbid%0A%20%20%20%20%20%20name%0A%20%20%20%20%20%20type%0A%20%20%20%20%20%20area%20%7B%0A%20%20%20%20%20%20%20%20name%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A&operationName=AppleLabels>)):
+…and the next five, using the `endCursor` from the previous result
+([try it](<https://graphbrainz.herokuapp.com/?query=query%20AppleLabels%20%7B%0A%20%20search%20%7B%0A%20%20%20%20labels(query%3A%20%22Apple%22%2C%20first%3A%205%2C%20after%3A%20%22YXJyYXljb25uZWN0aW9uOjQ%3D%22)%20%7B%0A%20%20%20%20%20%20...labelResults%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A%0Afragment%20labelResults%20on%20LabelConnection%20%7B%0A%20%20pageInfo%20%7B%0A%20%20%20%20endCursor%0A%20%20%7D%0A%20%20edges%20%7B%0A%20%20%20%20cursor%0A%20%20%20%20node%20%7B%0A%20%20%20%20%20%20mbid%0A%20%20%20%20%20%20name%0A%20%20%20%20%20%20type%0A%20%20%20%20%20%20area%20%7B%0A%20%20%20%20%20%20%20%20name%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A&operationName=AppleLabels>)):
 
 ```graphql
 query AppleLabels {
@@ -326,7 +340,8 @@ fragment marriages on Artist {
 }
 ```
 
-Images of Tom Petty provided by various extensions ([try it](<https://graphbrainz.herokuapp.com/?query=query%20TomPettyImages%20%7B%0A%20%20lookup%20%7B%0A%20%20%20%20artist(mbid%3A%20%225ca3f318-d028-4151-ac73-78e2b2d6cdcc%22)%20%7B%0A%20%20%20%20%20%20name%0A%20%20%20%20%20%20mediaWikiImages%20%7B%0A%20%20%20%20%20%20%20%20url%0A%20%20%20%20%20%20%20%20objectName%0A%20%20%20%20%20%20%20%20descriptionHTML%0A%20%20%20%20%20%20%20%20licenseShortName%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20fanArt%20%7B%0A%20%20%20%20%20%20%20%20thumbnails%20%7B%0A%20%20%20%20%20%20%20%20%20%20url%0A%20%20%20%20%20%20%20%20%20%20likeCount%0A%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20theAudioDB%20%7B%0A%20%20%20%20%20%20%20%20logo%0A%20%20%20%20%20%20%20%20biography%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A&operationName=TomPettyImages>)):
+Images of Tom Petty provided by various extensions
+([try it](<https://graphbrainz.herokuapp.com/?query=query%20TomPettyImages%20%7B%0A%20%20lookup%20%7B%0A%20%20%20%20artist(mbid%3A%20%225ca3f318-d028-4151-ac73-78e2b2d6cdcc%22)%20%7B%0A%20%20%20%20%20%20name%0A%20%20%20%20%20%20mediaWikiImages%20%7B%0A%20%20%20%20%20%20%20%20url%0A%20%20%20%20%20%20%20%20objectName%0A%20%20%20%20%20%20%20%20descriptionHTML%0A%20%20%20%20%20%20%20%20licenseShortName%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20fanArt%20%7B%0A%20%20%20%20%20%20%20%20thumbnails%20%7B%0A%20%20%20%20%20%20%20%20%20%20url%0A%20%20%20%20%20%20%20%20%20%20likeCount%0A%20%20%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%20%20theAudioDB%20%7B%0A%20%20%20%20%20%20%20%20logo%0A%20%20%20%20%20%20%20%20biography%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D%0A%20%20%7D%0A%7D%0A&operationName=TomPettyImages>)):
 
 ```graphql
 query TomPettyImages {
@@ -358,8 +373,8 @@ You can find more example queries in the [schema tests][].
 
 ## Questions
 
-**What’s with the cumbersome `edges`/`node` nesting? Why `first`/`after`
-instead of `limit`/`offset`? Why `mbid` instead of `id`?**
+**What’s with the cumbersome `edges`/`node` nesting? Why `first`/`after` instead
+of `limit`/`offset`? Why `mbid` instead of `id`?**
 
 You can thank [Relay][] for that; these are properties of a Relay-compliant
 schema. The schema was originally designed to be more user-friendly, but in the
@@ -393,9 +408,9 @@ query ChristmasAlbums {
 
 It’s likely that your query requires multiple round trips to the MusicBrainz
 REST API, which is subject to [rate limiting][]. While the query resolver tries
-very hard to fetch only the data necessary, and with the smallest number of
-API requests, it is not 100% optimal (yet). Make sure you are only requesting
-the fields you need and a reasonable level of nested entities – unless you are
+very hard to fetch only the data necessary, and with the smallest number of API
+requests, it is not 100% optimal (yet). Make sure you are only requesting the
+fields you need and a reasonable level of nested entities – unless you are
 willing to wait.
 
 You can also set up a [local MusicBrainz mirror][mirror] and configure

cli.js

@@ -1,2 +1,4 @@
 #!/usr/bin/env node
-require('./lib/index').start()
+import { start } from './src/index.js';
+
+start();

docs/extensions/README.md

@@ -6,14 +6,14 @@ Extensions can define new GraphQL types and use the `extend type` syntax to add
 new fields to any existing GraphBrainz type, including the root query.
 
 Several extensions are included by default, and you can install any number of
-additional extensions from a package manager or [write your own](#extension-api).
+additional extensions from a package manager or
+[write your own](#extension-api).
 
 ## Contents
 
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
 
-
 - [Loading Extensions](#loading-extensions)
 - [Built-in Extensions](#built-in-extensions)
 - [More Extensions](#more-extensions)
@@ -31,9 +31,9 @@ additional extensions from a package manager or [write your own](#extension-api)
 ## Loading Extensions
 
 The extensions to load are specified using the `extensions` option to the
-exported `graphbrainz()` middleware function. Each extension must be an object
-conforming to the [Extension API](#extension-api), or the path to a module to
-load via `require()` that exports such an object.
+exported `middleware()` function. Each extension must be an object conforming to
+the [Extension API](#extension-api), or the path to a module to load via
+`require()` that exports such an object.
 
 If you are running GraphBrainz as a standalone server, you may specify
 extensions via the `GRAPHBRAINZ_EXTENSIONS` environment variable, which will be
@@ -50,14 +50,14 @@ or environment variables. Check the documentation for each extension you use.
 The default extensions configuration looks like this:
 
 ```js
-graphbrainz({
+middleware({
   extensions: [
     'graphbrainz/extensions/cover-art-archive',
     'graphbrainz/extensions/fanart-tv',
     'graphbrainz/extensions/mediawiki',
-    'graphbrainz/extensions/the-audio-db'
-  ]
-})
+    'graphbrainz/extensions/the-audio-db',
+  ],
+});
 ```
 
 ## Built-in Extensions
@@ -71,8 +71,8 @@ See their respective documentation pages for schema info and config options.
   releases, and labels from fanart.tv.
 - [MediaWiki](./mediawiki.md): Retrieve information from MediaWiki image pages,
   like the actual image file URL and EXIF metadata.
-- [TheAudioDB](./the-audio-db.md): Retrieve images and information about artists,
-  releases, and recordings from TheAudioDB.com.
+- [TheAudioDB](./the-audio-db.md): Retrieve images and information about
+  artists, releases, and recordings from TheAudioDB.com.
 
 ## More Extensions
 
@@ -80,19 +80,21 @@ The following extensions are published separately, but can easily be added to
 GraphBrainz by installing them:
 
 - [Last.fm](https://github.com/exogen/graphbrainz-extension-lastfm): Retrieve
-  artist, release, and recording information from [Last.fm](https://www.last.fm/).
+  artist, release, and recording information from
+  [Last.fm](https://www.last.fm/).
 - [Discogs](https://github.com/exogen/graphbrainz-extension-discogs): Retrieve
   artist, label, release, and release group information from
   [Discogs](https://www.discogs.com/).
 - [Spotify](https://github.com/exogen/graphbrainz-extension-spotify): Retrieve
-  artist, release, and recording information from [Spotify](https://www.spotify.com/).
+  artist, release, and recording information from
+  [Spotify](https://www.spotify.com/).
 
 ## Extension API
 
-The core idea behind extensions comes from the [schema stitching][] feature
-from [graphql-tools][], although GraphBrainz does not currently use the exact
+The core idea behind extensions comes from the [schema stitching][] feature from
+[graphql-tools][], although GraphBrainz does not currently use the exact
 technique documented there. Instead, we call `parse` and `extendSchema` from
-[GraphQL.js][], followed by [addResolveFunctionsToSchema][].
+[GraphQL.js][], followed by [addResolversToSchema][].
 
 Extensions must export an object shaped like so:
 
@@ -103,8 +105,8 @@ type Extension = {
   extendContext?: (context: Context, options: Options) => Context,
   extendSchema?:
     | { schemas: Array<string | DocumentNode>, resolvers: ResolverMap }
-    | ((schema: GraphQLSchema, options: Options) => GraphQLSchema)
-}
+    | ((schema: GraphQLSchema, options: Options) => GraphQLSchema),
+};
 ```
 
 ### Properties
@@ -133,7 +135,7 @@ If it is an object, it should have a `schemas` array and a `resolvers` object.
 Each schema must be a string (containing type definitions in GraphQL schema
 language) or a `DocumentNode` (if the type definitions have already been
 parsed). The `resolvers` object should contain a mapping of type fields to new
-resolver functions for those fields. See [addResolveFunctionsToSchema][].
+resolver functions for those fields. See [addResolversToSchema][].
 
 If it is a function, it should accept `schema` and `options` arguments and
 return a new schema. Use this if you’d like to perform custom schema extension
@@ -153,17 +155,17 @@ module.exports = {
       extend type Query {
         helloWorld: String!
       }
-    `
+    `,
     ],
     resolvers: {
       Query: {
         helloWorld: {
-          resolve: () => 'It worked!'
-        }
-      }
-    }
-  }
-}
+          resolve: () => 'It worked!',
+        },
+      },
+    },
+  },
+};
 ```
 
 This will allow the following query to be made:
@@ -181,24 +183,24 @@ See the code for the [built-in extensions][] for more examples.
 Extensions can load and resolve data in any manner they please, and you can
 write them in any way that conforms to the API. But if you want an extra feather
 in your cap, there are a few guidelines you should follow in order to maintain
-consistency with GraphBrainz and the built-in extensions. Here are some tips
-for writing a good extension:
+consistency with GraphBrainz and the built-in extensions. Here are some tips for
+writing a good extension:
 
 - If you need to make HTTP requests, using a [Client][] subclass will get you
   rate limiting, error handling, retrying, and a Promise-based API for free.
-- Default to following the rate limiting rules of any APIs you use. If there
-  are no guidelines on rate limiting, consider playing nice anyway and limiting
-  your client to around 1 to 10 requests per second.
+- Default to following the rate limiting rules of any APIs you use. If there are
+  no guidelines on rate limiting, consider playing nice anyway and limiting your
+  client to around 1 to 10 requests per second.
 - Use a [DataLoader][dataloader] instance to batch and cache requests. Even if
   the data source doesn’t support batching, DataLoader will help by deduping
   in-flight requests for the same key, preventing unnecessary requests.
 - Use a configurable cache and make sure you aren’t caching everything
   indefinitely by accident. The `cacheMap` option to DataLoader is a good place
   to put it.
-- Get as much configuration from environment variables as possible so that
-  users can just run the standalone server instead of writing any code. If you
-  need more complex configuration, use a single field on the `options` object
-  as a namespace for your extension’s options.
+- Get as much configuration from environment variables as possible so that users
+  can just run the standalone server instead of writing any code. If you need
+  more complex configuration, use a single field on the `options` object as a
+  namespace for your extension’s options.
 - Don’t hesitate to rename fields returned by third-party APIs when translating
   them to the GraphQL schema. Consistency with GraphQL conventions and the
   GraphBrainz schema is more desirable than consistency with the original API
@@ -236,14 +238,18 @@ for writing a good extension:
   with the built-in extensions.
 
 [graphql-tools]: http://dev.apollodata.com/tools/graphql-tools/index.html
-[schema stitching]: http://dev.apollodata.com/tools/graphql-tools/schema-stitching.html
-[mergeschemas]: http://dev.apollodata.com/tools/graphql-tools/schema-stitching.html#mergeSchemas
+[schema stitching]:
+  http://dev.apollodata.com/tools/graphql-tools/schema-stitching.html
+[mergeschemas]:
+  http://dev.apollodata.com/tools/graphql-tools/schema-stitching.html#mergeSchemas
 [dataloader]: https://github.com/facebook/dataloader
 [built-in extensions]: ../../src/extensions
 [client]: ../../src/api/client.js
 [graphql-markdown]: https://github.com/exogen/graphql-markdown
-[diffschema]: https://github.com/exogen/graphql-markdown#diffschemaoldschema-object-newschema-object-options-object
+[diffschema]:
+  https://github.com/exogen/graphql-markdown#diffschemaoldschema-object-newschema-object-options-object
 [build-extension-docs]: ../../scripts/build-extension-docs.js
 [relay]: https://facebook.github.io/relay/
 [graphql.js]: http://graphql.org/graphql-js/
-[addresolvefunctionstoschema]: http://dev.apollodata.com/tools/graphql-tools/resolvers.html#addResolveFunctionsToSchema
+[addresolverstoschema]:
+  http://dev.apollodata.com/tools/graphql-tools/resolvers.html#addResolversToSchema

docs/types.md

@@ -95,7 +95,7 @@ or the schemas provided by the [built-in extensions](extensions).
 
 </details>
 
-## Query 
+## Query
 The query root, from which multiple types of MusicBrainz
 requests can be made.
 
@@ -7405,7 +7405,7 @@ A length of time, in milliseconds.
 
 ### Float
 
-The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point). 
+The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](https://en.wikipedia.org/wiki/IEEE_floating_point).
 
 ### ID
 
@@ -7444,7 +7444,7 @@ compositions.
 
 ### Int
 
-The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1. 
+The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1.
 
 ### Locale
 

extensions/cover-art-archive.js

@@ -1 +1 @@
-module.exports = require('../lib/extensions/cover-art-archive')
+export { default } from '../src/extensions/cover-art-archive/index.js';

extensions/fanart-tv.js

@@ -1 +1 @@
-module.exports = require('../lib/extensions/fanart-tv')
+export { default } from '../src/extensions/fanart-tv/index.js';

extensions/mediawiki.js

@@ -1 +1 @@
-module.exports = require('../lib/extensions/mediawiki')
+export { default } from '../src/extensions/mediawiki/index.js';

extensions/the-audio-db.js

@@ -1 +1 @@
-module.exports = require('../lib/extensions/the-audio-db')
+export { default } from '../src/extensions/the-audio-db/index.js';

package.json

@@ -1,53 +1,7 @@
 {
   "name": "graphbrainz",
-  "version": "8.1.0",
+  "version": "9.0.0",
   "description": "A GraphQL schema, Express server, and middleware for querying the MusicBrainz.",
-  "main": "lib/index.js",
-  "bin": "cli.js",
-  "files": [
-    "extensions",
-    "lib",
-    "scripts",
-    "src",
-    ".babelrc",
-    "cli.js",
-    "Procfile",
-    "schema.json",
-    "yarn.lock"
-  ],
-  "engines": {
-    "node": ">=8.10.0",
-    "npm": ">=5.2.0"
-  },
-  "scripts": {
-    "build": "npm run build:lib && npm run update-schema && npm run build:docs",
-    "build:docs": "npm run build:docs:readme && npm run build:docs:schema && npm run build:docs:types && npm run build:docs:extensions",
-    "build:docs:extensions": "babel-node scripts/build-extension-docs.js",
-    "build:docs:readme": "doctoc --notitle README.md docs/extensions/README.md",
-    "build:docs:schema": "printf '# GraphQL Schema\\n\\n%s\n' \"$(npm run -s print-schema:md)\" > docs/schema.md",
-    "build:docs:types": "graphql-markdown ./src/schema.js --require babel-register --no-title --update-file docs/types.md",
-    "build:lib": "babel --out-dir lib src",
-    "clean": "npm run clean:lib",
-    "clean:lib": "rm -rf lib",
-    "deploy": "./scripts/deploy.sh",
-    "format": "npm run lint:fix",
-    "lint": "eslint .",
-    "lint:fix": "eslint --fix .",
-    "prepare": "npm run clean:lib && npm run build:lib",
-    "preversion": "npm run update-schema && npm run build:docs && git add schema.json docs",
-    "print-schema": "babel-node scripts/print-schema.js",
-    "print-schema:json": "npm run print-schema -- --json",
-    "print-schema:md": "printf '```graphql\\n%s\\n```' \"$(npm run -s print-schema)\"",
-    "start": "node lib/index.js",
-    "start:dev": "nodemon --exec babel-node src/index.js",
-    "test": "npm run lint && npm run test:coverage",
-    "test:coverage": "cross-env NODE_ENV=test nyc npm run test:only",
-    "test:only": "cross-env VCR_MODE=playback ava",
-    "test:record": "cross-env VCR_MODE=record ava --concurrency 1",
-    "test:record-new": "cross-env VCR_MODE=cache ava --concurrency 1",
-    "test:watch": "npm run test:only -- --watch",
-    "update-schema": "npm run -s print-schema:json > schema.json"
-  },
   "keywords": [
     "musicbrainz",
     "graphql",
@@ -60,82 +14,107 @@
   "author": {
     "name": "Brian Beck",
     "email": "exogen@gmail.com",
-    "url": "http://brianbeck.com/"
+    "url": "https://brianbeck.com/"
   },
   "repository": {
     "type": "git",
     "url": "https://github.com/exogen/graphbrainz.git"
   },
   "license": "MIT",
-  "dependencies": {
-    "babel-runtime": "^6.25.0",
-    "compression": "^1.7.3",
-    "cors": "^2.8.4",
-    "dashify": "^1.0.0",
-    "dataloader": "^1.4.0",
-    "debug": "^3.0.0",
-    "dotenv": "^6.0.0",
-    "es6-error": "^4.1.1",
-    "express": "^4.16.3",
-    "express-graphql": "^0.6.12",
-    "graphql": "^0.13.2",
-    "graphql-relay": "^0.5.5",
-    "graphql-tools": "^3.1.1",
-    "lru-cache": "^4.1.3",
-    "pascalcase": "^0.1.1",
-    "qs": "^6.5.2",
-    "request": "^2.87.0",
-    "retry": "^0.12.0"
+  "engines": {
+    "node": ">=12.18.0",
+    "npm": ">=6.0.0"
   },
-  "devDependencies": {
-    "ava": "^0.25.0",
-    "babel-cli": "^6.24.1",
-    "babel-eslint": "^8.2.6",
-    "babel-plugin-istanbul": "^4.1.6",
-    "babel-plugin-syntax-object-rest-spread": "^6.13.0",
-    "babel-plugin-transform-runtime": "^6.23.0",
-    "babel-preset-env": "^1.7.0",
-    "babel-register": "^6.24.1",
-    "coveralls": "^3.0.2",
-    "cross-env": "^5.2.0",
-    "doctoc": "^1.3.1",
-    "eslint": "^5.3.0",
-    "eslint-config-prettier": "^2.9.0",
-    "eslint-config-standard": "^11.0.0",
-    "eslint-plugin-import": "^2.13.0",
-    "eslint-plugin-markdown": "^1.0.0-beta.6",
-    "eslint-plugin-node": "^7.0.1",
-    "eslint-plugin-prettier": "^2.6.2",
-    "eslint-plugin-promise": "^3.8.0",
-    "eslint-plugin-standard": "^3.1.0",
-    "graphql-markdown": "^4.0.0",
-    "nodemon": "^1.18.3",
-    "nyc": "^12.0.2",
-    "prettier": "^1.14.0",
-    "replayer": "^2.2.3",
-    "rimraf": "^2.6.1",
-    "sinon": "^6.1.4"
+  "type": "module",
+  "main": "./src/index.js",
+  "exports": {
+    ".": "./src/index.js",
+    "./extensions/cover-art-archive": "./extensions/cover-art-archive.js",
+    "./extensions/fanart-tv": "./extensions/fanart-tv.js",
+    "./extensions/mediawiki": "./extensions/mediawiki.js",
+    "./extensions/the-audio-db": "./extensions/the-audio-db.js",
+    "./package.json": "./package.json",
+    "./schema.json": "./schema.json"
   },
-  "standard": {
-    "parser": "babel-eslint"
+  "bin": "cli.js",
+  "files": [
+    "extensions",
+    "src",
+    "cli.js",
+    "schema.json"
+  ],
+  "scripts": {
+    "build": "npm run update-schema && npm run build:docs",
+    "build:docs": "npm run build:docs:readme && npm run build:docs:schema && npm run build:docs:types && npm run build:docs:extensions",
+    "build:docs:extensions": "node scripts/build-extension-docs.js",
+    "build:docs:readme": "doctoc --notitle README.md docs/extensions/README.md",
+    "build:docs:schema": "printf '# GraphQL Schema\\n\\n%s\n' \"$(npm run -s print-schema:md)\" > docs/schema.md",
+    "build:docs:types": "graphql-markdown ./schema.json --no-title --update-file docs/types.md",
+    "deploy": "./scripts/deploy.sh",
+    "format": "npm run lint:fix",
+    "lint": "eslint .",
+    "lint:fix": "eslint --fix .",
+    "preversion": "npm run update-schema && npm run build:docs && git add schema.json docs",
+    "print-schema": "node scripts/print-schema.js",
+    "print-schema:json": "npm run print-schema -- --json",
+    "print-schema:md": "printf '```graphql\\n%s\\n```' \"$(npm run -s print-schema)\"",
+    "start": "node cli.js",
+    "start:dev": "nodemon cli.js",
+    "test": "npm run lint && npm run test:coverage",
+    "test:coverage": "c8 --all npm run test:only",
+    "test:only": "cross-env NOCK_MODE=play ava",
+    "test:record": "cross-env NOCK_MODE=record ava --concurrency=1 --timeout=1m",
+    "test:record-new": "cross-env NOCK_MODE=cache ava --concurrency=1 --timeout=1m",
+    "test:watch": "npm run test:only -- --watch",
+    "update-schema": "npm run -s print-schema:json > schema.json"
   },
   "ava": {
     "require": [
-      "dotenv/config",
-      "babel-register"
+      "dotenv/config"
     ]
   },
-  "nyc": {
-    "include": [
-      "src/**"
-    ],
-    "reporter": [
-      "lcov",
-      "text"
-    ],
-    "all": true,
-    "cache": true,
-    "sourceMap": false,
-    "instrument": false
+  "ava-nock": {
+    "fixtureDir": "fixtures",
+    "pathFilter": [
+      "(([?&]api_key=)(\\w+))|((/json/)(\\w+)(/[\\w-]+-mb\\.php))",
+      "$2$5*$7"
+    ]
+  },
+  "dependencies": {
+    "@graphql-tools/schema": "^7.1.3",
+    "compression": "^1.7.3",
+    "cors": "^2.8.4",
+    "dashify": "^2.0.0",
+    "dataloader": "^2.0.0",
+    "debug": "^4.3.1",
+    "dotenv": "^8.2.0",
+    "es6-error": "^4.1.1",
+    "express": "^4.16.3",
+    "express-graphql": "^0.12.0",
+    "got": "^11.8.2",
+    "graphql": "^15.5.0",
+    "graphql-relay": "^0.6.0",
+    "lru-cache": "^6.0.0",
+    "pascalcase": "^1.0.0",
+    "read-pkg-up": "^8.0.0"
+  },
+  "devDependencies": {
+    "ava": "^3.15.0",
+    "ava-nock": "^2.1.0",
+    "c8": "^7.7.1",
+    "coveralls": "^3.0.2",
+    "cross-env": "^7.0.3",
+    "doctoc": "^2.0.0",
+    "eslint": "^7.24.0",
+    "eslint-config-prettier": "^8.1.0",
+    "eslint-plugin-import": "^2.13.0",
+    "eslint-plugin-node": "^11.1.0",
+    "eslint-plugin-prettier": "^3.3.1",
+    "eslint-plugin-promise": "^5.1.0",
+    "graphql-markdown": "^6.0.0",
+    "nodemon": "^2.0.7",
+    "prettier": "^2.2.1",
+    "rimraf": "^3.0.2",
+    "sinon": "^10.0.0"
   }
 }

schema.json

@@ -476,16 +476,6 @@
           "enumValues": null,
           "possibleTypes": null
         },
-        {
-          "kind": "SCALAR",
-          "name": "MBID",
-          "description": "The MBID scalar represents MusicBrainz identifiers, which are\n36-character UUIDs.",
-          "fields": null,
-          "inputFields": null,
-          "interfaces": null,
-          "enumValues": null,
-          "possibleTypes": null
-        },
         {
           "kind": "OBJECT",
           "name": "Area",
@@ -937,7 +927,7 @@
             }
           ],
           "inputFields": null,
-          "interfaces": null,
+          "interfaces": [],
           "enumValues": null,
           "possibleTypes": [
             {
@@ -1045,7 +1035,7 @@
             }
           ],
           "inputFields": null,
-          "interfaces": null,
+          "interfaces": [],
           "enumValues": null,
           "possibleTypes": [
             {
@@ -1120,6 +1110,16 @@
             }
           ]
         },
+        {
+          "kind": "SCALAR",
+          "name": "MBID",
+          "description": "The MBID scalar represents MusicBrainz identifiers, which are\n36-character UUIDs.",
+          "fields": null,
+          "inputFields": null,
+          "interfaces": null,
+          "enumValues": null,
+          "possibleTypes": null
+        },
         {
           "kind": "SCALAR",
           "name": "String",
@@ -1233,16 +1233,6 @@
           "enumValues": null,
           "possibleTypes": null
         },
-        {
-          "kind": "SCALAR",
-          "name": "Int",
-          "description": "The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1. ",
-          "fields": null,
-          "inputFields": null,
-          "interfaces": null,
-          "enumValues": null,
-          "possibleTypes": null
-        },
         {
           "kind": "OBJECT",
           "name": "ArtistConnection",
@@ -2559,145 +2549,13 @@
           "possibleTypes": null
         },
         {
-          "kind": "ENUM",
-          "name": "ReleaseGroupType",
-          "description": "A type used to describe release groups, e.g. album, single, EP,\netc.",
+          "kind": "SCALAR",
+          "name": "Int",
+          "description": "The `Int` scalar type represents non-fractional signed whole numeric values. Int can represent values between -(2^31) and 2^31 - 1.",
           "fields": null,
           "inputFields": null,
           "interfaces": null,
-          "enumValues": [
-            {
-              "name": "ALBUM",
-              "description": "An album, perhaps better defined as a “Long Play” (LP)\nrelease, generally consists of previously unreleased material (unless this type\nis combined with secondary types which change that, such as “Compilation”). This\nincludes album re-issues, with or without bonus tracks.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "SINGLE",
-              "description": "A single typically has one main song and possibly a handful\nof additional tracks or remixes of the main track. A single is usually named\nafter its main song.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "EP",
-              "description": "An EP is a so-called “Extended Play” release and often\ncontains the letters EP in the title. Generally an EP will be shorter than a\nfull length release (an LP or “Long Play”) and the tracks are usually exclusive\nto the EP, in other words the tracks don’t come from a previously issued\nrelease. EP is fairly difficult to define; usually it should only be assumed\nthat a release is an EP if the artist defines it as such.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "OTHER",
-              "description": "Any release that does not fit any of the other categories.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "BROADCAST",
-              "description": "An episodic release that was originally broadcast via radio,\ntelevision, or the Internet, including podcasts.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "COMPILATION",
-              "description": "A compilation is a collection of previously released tracks\nby one or more artists.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "SOUNDTRACK",
-              "description": "A soundtrack is the musical score to a movie, TV series,\nstage show, computer game, etc.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "SPOKENWORD",
-              "description": "A non-music spoken word release.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "INTERVIEW",
-              "description": "An interview release contains an interview, generally with\nan artist.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "AUDIOBOOK",
-              "description": "An audiobook is a book read by a narrator without music.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "LIVE",
-              "description": "A release that was recorded live.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "REMIX",
-              "description": "A release that was (re)mixed from previously released\nmaterial.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "DJMIX",
-              "description": "A DJ-mix is a sequence of several recordings played one\nafter the other, each one modified so that they blend together into a continuous\nflow of music. A DJ mix release requires that the recordings be modified in some\nmanner, and the DJ who does this modification is usually (although not always)\ncredited in a fairly prominent way.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "MIXTAPE",
-              "description": "Promotional in nature (but not necessarily free), mixtapes\nand street albums are often released by artists to promote new artists, or\nupcoming studio albums by prominent artists. They are also sometimes used to\nkeep fans’ attention between studio releases and are most common in rap & hip\nhop genres. They are often not sanctioned by the artist’s label, may lack proper\nsample or song clearances and vary widely in production and recording quality.\nWhile mixtapes are generally DJ-mixed, they are distinct from commercial DJ\nmixes (which are usually deemed compilations) and are defined by having a\nsignificant proportion of new material, including original production or\noriginal vocals over top of other artists’ instrumentals. They are distinct from\ndemos in that they are designed for release directly to the public and fans, not\nto labels.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "DEMO",
-              "description": "A release that was recorded for limited circulation or\nreference use rather than for general public release.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "NAT",
-              "description": "A non-album track (special case).",
-              "isDeprecated": false,
-              "deprecationReason": null
-            }
-          ],
-          "possibleTypes": null
-        },
-        {
-          "kind": "ENUM",
-          "name": "ReleaseStatus",
-          "description": "A type used to describe the status of releases, e.g. official,\nbootleg, etc.",
-          "fields": null,
-          "inputFields": null,
-          "interfaces": null,
-          "enumValues": [
-            {
-              "name": "OFFICIAL",
-              "description": "Any release officially sanctioned by the artist and/or their\nrecord company. (Most releases will fit into this category.)",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "PROMOTION",
-              "description": "A giveaway release or a release intended to promote an\nupcoming official release, e.g. prerelease albums or releases included with a\nmagazine.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "BOOTLEG",
-              "description": "An unofficial/underground release that was not sanctioned by\nthe artist and/or the record company.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            },
-            {
-              "name": "PSEUDORELEASE",
-              "description": "A pseudo-release is a duplicate release for\ntranslation/transliteration purposes.",
-              "isDeprecated": false,
-              "deprecationReason": null
-            }
-          ],
+          "enumValues": null,
           "possibleTypes": null
         },
         {
@@ -3357,6 +3215,41 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "ENUM",
+          "name": "ReleaseStatus",
+          "description": "A type used to describe the status of releases, e.g. official,\nbootleg, etc.",
+          "fields": null,
+          "inputFields": null,
+          "interfaces": null,
+          "enumValues": [
+            {
+              "name": "OFFICIAL",
+              "description": "Any release officially sanctioned by the artist and/or their\nrecord company. (Most releases will fit into this category.)",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "PROMOTION",
+              "description": "A giveaway release or a release intended to promote an\nupcoming official release, e.g. prerelease albums or releases included with a\nmagazine.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "BOOTLEG",
+              "description": "An unofficial/underground release that was not sanctioned by\nthe artist and/or the record company.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "PSEUDORELEASE",
+              "description": "A pseudo-release is a duplicate release for\ntranslation/transliteration purposes.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "possibleTypes": null
+        },
         {
           "kind": "OBJECT",
           "name": "Medium",
@@ -4160,6 +4053,113 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "ENUM",
+          "name": "ReleaseGroupType",
+          "description": "A type used to describe release groups, e.g. album, single, EP,\netc.",
+          "fields": null,
+          "inputFields": null,
+          "interfaces": null,
+          "enumValues": [
+            {
+              "name": "ALBUM",
+              "description": "An album, perhaps better defined as a “Long Play” (LP)\nrelease, generally consists of previously unreleased material (unless this type\nis combined with secondary types which change that, such as “Compilation”). This\nincludes album re-issues, with or without bonus tracks.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "SINGLE",
+              "description": "A single typically has one main song and possibly a handful\nof additional tracks or remixes of the main track. A single is usually named\nafter its main song.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "EP",
+              "description": "An EP is a so-called “Extended Play” release and often\ncontains the letters EP in the title. Generally an EP will be shorter than a\nfull length release (an LP or “Long Play”) and the tracks are usually exclusive\nto the EP, in other words the tracks don’t come from a previously issued\nrelease. EP is fairly difficult to define; usually it should only be assumed\nthat a release is an EP if the artist defines it as such.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "OTHER",
+              "description": "Any release that does not fit any of the other categories.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "BROADCAST",
+              "description": "An episodic release that was originally broadcast via radio,\ntelevision, or the Internet, including podcasts.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "COMPILATION",
+              "description": "A compilation is a collection of previously released tracks\nby one or more artists.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "SOUNDTRACK",
+              "description": "A soundtrack is the musical score to a movie, TV series,\nstage show, computer game, etc.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "SPOKENWORD",
+              "description": "A non-music spoken word release.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "INTERVIEW",
+              "description": "An interview release contains an interview, generally with\nan artist.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "AUDIOBOOK",
+              "description": "An audiobook is a book read by a narrator without music.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "LIVE",
+              "description": "A release that was recorded live.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "REMIX",
+              "description": "A release that was (re)mixed from previously released\nmaterial.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "DJMIX",
+              "description": "A DJ-mix is a sequence of several recordings played one\nafter the other, each one modified so that they blend together into a continuous\nflow of music. A DJ mix release requires that the recordings be modified in some\nmanner, and the DJ who does this modification is usually (although not always)\ncredited in a fairly prominent way.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "MIXTAPE",
+              "description": "Promotional in nature (but not necessarily free), mixtapes\nand street albums are often released by artists to promote new artists, or\nupcoming studio albums by prominent artists. They are also sometimes used to\nkeep fans’ attention between studio releases and are most common in rap & hip\nhop genres. They are often not sanctioned by the artist’s label, may lack proper\nsample or song clearances and vary widely in production and recording quality.\nWhile mixtapes are generally DJ-mixed, they are distinct from commercial DJ\nmixes (which are usually deemed compilations) and are defined by having a\nsignificant proportion of new material, including original production or\noriginal vocals over top of other artists’ instrumentals. They are distinct from\ndemos in that they are designed for release directly to the public and fans, not\nto labels.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "DEMO",
+              "description": "A release that was recorded for limited circulation or\nreference use rather than for general public release.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "NAT",
+              "description": "A non-album track (special case).",
+              "isDeprecated": false,
+              "deprecationReason": null
+            }
+          ],
+          "possibleTypes": null
+        },
         {
           "kind": "OBJECT",
           "name": "Relationships",
@@ -6649,7 +6649,7 @@
         {
           "kind": "SCALAR",
           "name": "Float",
-          "description": "The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](http://en.wikipedia.org/wiki/IEEE_floating_point). ",
+          "description": "The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](https://en.wikipedia.org/wiki/IEEE_floating_point).",
           "fields": null,
           "inputFields": null,
           "interfaces": null,
@@ -8784,16 +8784,6 @@
           "enumValues": null,
           "possibleTypes": null
         },
-        {
-          "kind": "SCALAR",
-          "name": "URLString",
-          "description": "A web address.",
-          "fields": null,
-          "inputFields": null,
-          "interfaces": null,
-          "enumValues": null,
-          "possibleTypes": null
-        },
         {
           "kind": "OBJECT",
           "name": "URL",
@@ -8876,6 +8866,16 @@
           "enumValues": null,
           "possibleTypes": null
         },
+        {
+          "kind": "SCALAR",
+          "name": "URLString",
+          "description": "A web address.",
+          "fields": null,
+          "inputFields": null,
+          "interfaces": null,
+          "enumValues": null,
+          "possibleTypes": null
+        },
         {
           "kind": "OBJECT",
           "name": "BrowseQuery",
@@ -10252,6 +10252,18 @@
           "name": "__Schema",
           "description": "A GraphQL Schema defines the capabilities of a GraphQL server. It exposes all available types and directives on the server, as well as the entry points for query, mutation, and subscription operations.",
           "fields": [
+            {
+              "name": "description",
+              "description": null,
+              "args": [],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "types",
               "description": "A list of all types supported by this server.",
@@ -10349,7 +10361,7 @@
         {
           "kind": "OBJECT",
           "name": "__Type",
-          "description": "The fundamental unit of any GraphQL Schema is the type. There are many kinds of types in GraphQL as represented by the `__TypeKind` enum.\n\nDepending on the kind of a type, certain fields describe information about that type. Scalar types provide no information beyond a name and description, while Enum types provide their values. Object and Interface types provide the fields they describe. Abstract types, Union and Interface, provide the Object types possible at runtime. List and NonNull types compose other types.",
+          "description": "The fundamental unit of any GraphQL Schema is the type. There are many kinds of types in GraphQL as represented by the `__TypeKind` enum.\n\nDepending on the kind of a type, certain fields describe information about that type. Scalar types provide no information beyond a name, description and optional `specifiedByUrl`, while Enum types provide their values. Object and Interface types provide the fields they describe. Abstract types, Union and Interface, provide the Object types possible at runtime. List and NonNull types compose other types.",
           "fields": [
             {
               "name": "kind",
@@ -10391,6 +10403,18 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "specifiedByUrl",
+              "description": null,
+              "args": [],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "fields",
               "description": null,
@@ -10496,7 +10520,18 @@
             {
               "name": "inputFields",
               "description": null,
-              "args": [],
+              "args": [
+                {
+                  "name": "includeDeprecated",
+                  "description": null,
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Boolean",
+                    "ofType": null
+                  },
+                  "defaultValue": "false"
+                }
+              ],
               "type": {
                 "kind": "LIST",
                 "name": null,
@@ -10553,7 +10588,7 @@
             },
             {
               "name": "INTERFACE",
-              "description": "Indicates this type is an interface. `fields` and `possibleTypes` are valid fields.",
+              "description": "Indicates this type is an interface. `fields`, `interfaces`, and `possibleTypes` are valid fields.",
               "isDeprecated": false,
               "deprecationReason": null
             },
@@ -10626,7 +10661,18 @@
             {
               "name": "args",
               "description": null,
-              "args": [],
+              "args": [
+                {
+                  "name": "includeDeprecated",
+                  "description": null,
+                  "type": {
+                    "kind": "SCALAR",
+                    "name": "Boolean",
+                    "ofType": null
+                  },
+                  "defaultValue": "false"
+                }
+              ],
               "type": {
                 "kind": "NON_NULL",
                 "name": null,
@@ -10757,6 +10803,34 @@
               },
               "isDeprecated": false,
               "deprecationReason": null
+            },
+            {
+              "name": "isDeprecated",
+              "description": null,
+              "args": [],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Boolean",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
+            {
+              "name": "deprecationReason",
+              "description": null,
+              "args": [],
+              "type": {
+                "kind": "SCALAR",
+                "name": "String",
+                "ofType": null
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
             }
           ],
           "inputFields": null,
@@ -10864,6 +10938,22 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "isRepeatable",
+              "description": null,
+              "args": [],
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "Boolean",
+                  "ofType": null
+                }
+              },
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "locations",
               "description": null,
@@ -10911,54 +11001,6 @@
               },
               "isDeprecated": false,
               "deprecationReason": null
-            },
-            {
-              "name": "onOperation",
-              "description": null,
-              "args": [],
-              "type": {
-                "kind": "NON_NULL",
-                "name": null,
-                "ofType": {
-                  "kind": "SCALAR",
-                  "name": "Boolean",
-                  "ofType": null
-                }
-              },
-              "isDeprecated": true,
-              "deprecationReason": "Use `locations`."
-            },
-            {
-              "name": "onFragment",
-              "description": null,
-              "args": [],
-              "type": {
-                "kind": "NON_NULL",
-                "name": null,
-                "ofType": {
-                  "kind": "SCALAR",
-                  "name": "Boolean",
-                  "ofType": null
-                }
-              },
-              "isDeprecated": true,
-              "deprecationReason": "Use `locations`."
-            },
-            {
-              "name": "onField",
-              "description": null,
-              "args": [],
-              "type": {
-                "kind": "NON_NULL",
-                "name": null,
-                "ofType": {
-                  "kind": "SCALAR",
-                  "name": "Boolean",
-                  "ofType": null
-                }
-              },
-              "isDeprecated": true,
-              "deprecationReason": "Use `locations`."
             }
           ],
           "inputFields": null,
@@ -11016,6 +11058,12 @@
               "isDeprecated": false,
               "deprecationReason": null
             },
+            {
+              "name": "VARIABLE_DEFINITION",
+              "description": "Location adjacent to a variable definition.",
+              "isDeprecated": false,
+              "deprecationReason": null
+            },
             {
               "name": "SCHEMA",
               "description": "Location adjacent to a schema definition.",
@@ -11142,12 +11190,14 @@
           "description": "Marks an element of a GraphQL schema as no longer supported.",
           "locations": [
             "FIELD_DEFINITION",
+            "ARGUMENT_DEFINITION",
+            "INPUT_FIELD_DEFINITION",
             "ENUM_VALUE"
           ],
           "args": [
             {
               "name": "reason",
-              "description": "Explains why this element was deprecated, usually also including a suggestion for how to access supported similar data. Formatted in [Markdown](https://daringfireball.net/projects/markdown/).",
+              "description": "Explains why this element was deprecated, usually also including a suggestion for how to access supported similar data. Formatted using the Markdown syntax, as specified by [CommonMark](https://commonmark.org/).",
               "type": {
                 "kind": "SCALAR",
                 "name": "String",
@@ -11156,6 +11206,29 @@
               "defaultValue": "\"No longer supported\""
             }
           ]
+        },
+        {
+          "name": "specifiedBy",
+          "description": "Exposes a URL that specifies the behaviour of this scalar.",
+          "locations": [
+            "SCALAR"
+          ],
+          "args": [
+            {
+              "name": "url",
+              "description": "The URL that specifies the behaviour of this scalar.",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "String",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            }
+          ]
         }
       ]
     }

scripts/build-extension-docs.js

@@ -1,52 +1,62 @@
-import path from 'path'
-import { graphql, introspectionQuery } from 'graphql'
-import { updateSchema, diffSchema } from 'graphql-markdown'
-import baseSchema, { createSchema } from '../src/schema'
+import path from 'path';
+import { fileURLToPath } from 'url';
+import GraphQL from 'graphql';
+import GraphQLMarkdown from 'graphql-markdown';
+import { baseSchema, createSchema } from '../src/schema.js';
 
-const extensionModules = [
+const { graphql, getIntrospectionQuery } = GraphQL;
+const { updateSchema, diffSchema } = GraphQLMarkdown;
+
+async function getSchemaJSON(schema) {
+  const result = await graphql(schema, getIntrospectionQuery());
+  return result.data;
+}
+
+async function buildExtensionDocs(extensionModules) {
+  return Promise.all(
+    extensionModules.map(async (extensionName) => {
+      const extensionModule = await import(
+        `../src/extensions/${extensionName}/index.js`
+      );
+      const extension = extensionModule.default;
+      console.log(`Generating docs for “${extension.name}” extension...`);
+      const schema = createSchema(baseSchema, { extensions: [extension] });
+      const [baseSchemaJSON, schemaJSON] = await Promise.all([
+        getSchemaJSON(baseSchema),
+        getSchemaJSON(schema),
+      ]);
+      const outputSchema = diffSchema(baseSchemaJSON, schemaJSON, {
+        processTypeDiff(type) {
+          if (type.description === undefined) {
+            type.description =
+              ':small_blue_diamond: *This type has been extended. See the ' +
+              '[base schema](../types.md)\nfor a description and additional ' +
+              'fields.*';
+          }
+          return type;
+        },
+      });
+      const outputPath = path.resolve(
+        path.dirname(fileURLToPath(import.meta.url)),
+        `../docs/extensions/${extensionName}.md`
+      );
+      return updateSchema(outputPath, outputSchema, {
+        unknownTypeURL: '../types.md',
+        headingLevel: 2,
+      });
+    })
+  );
+}
+
+buildExtensionDocs([
   'cover-art-archive',
   'fanart-tv',
   'mediawiki',
-  'the-audio-db'
-]
-
-function getSchemaJSON(schema) {
-  return graphql(schema, introspectionQuery).then(result => result.data)
-}
-
-Promise.all(
-  extensionModules.map(extensionModule => {
-    const extension = require(`../src/extensions/${extensionModule}`).default
-    console.log(`Generating docs for “${extension.name}” extension...`)
-    const schema = createSchema(baseSchema, { extensions: [extension] })
-    return Promise.all([getSchemaJSON(baseSchema), getSchemaJSON(schema)]).then(
-      ([baseSchemaJSON, schemaJSON]) => {
-        const outputSchema = diffSchema(baseSchemaJSON, schemaJSON, {
-          processTypeDiff(type) {
-            if (type.description === undefined) {
-              type.description =
-                ':small_blue_diamond: *This type has been extended. See the ' +
-                '[base schema](../types.md)\nfor a description and additional ' +
-                'fields.*'
-            }
-            return type
-          }
-        })
-        const outputPath = path.resolve(
-          __dirname,
-          `../docs/extensions/${extensionModule}.md`
-        )
-        return updateSchema(outputPath, outputSchema, {
-          unknownTypeURL: '../types.md',
-          headingLevel: 2
-        })
-      }
-    )
-  })
-)
-  .then(extensions => {
-    console.log(`Built docs for ${extensions.length} extension(s).`)
-  })
-  .catch(err => {
-    console.log('Error:', err)
+  'the-audio-db',
+])
+  .then((extensions) => {
+    console.log(`Built docs for ${extensions.length} extension(s).`);
   })
+  .catch((err) => {
+    console.log('Error:', err);
+  });

scripts/print-schema.js

@@ -1,14 +1,16 @@
-import { graphql, introspectionQuery, printSchema } from 'graphql'
-import schema from '../src/schema'
+import GraphQL from 'graphql';
+import { baseSchema as schema } from '../src/schema.js';
+
+const { graphql, getIntrospectionQuery, printSchema } = GraphQL;
 
 if (process.argv[2] === '--json') {
-  graphql(schema, introspectionQuery)
-    .then(result => {
-      console.log(JSON.stringify(result, null, 2))
-    })
-    .catch(err => {
-      console.error(err)
+  graphql(schema, getIntrospectionQuery())
+    .then((result) => {
+      console.log(JSON.stringify(result, null, 2));
     })
+    .catch((err) => {
+      console.error(err);
+    });
 } else {
-  console.log(printSchema(schema))
+  console.log(printSchema(schema));
 }

src/api/client.js

@@ -1,31 +1,15 @@
-import request from 'request'
-import retry from 'retry'
-import ExtendableError from 'es6-error'
-import RateLimit from '../rate-limit'
-import pkg from '../../package.json'
+import { fileURLToPath } from 'url';
+import createDebug from 'debug';
+import got from 'got';
+import { readPackageUpSync } from 'read-pkg-up';
+import RateLimit from '../rate-limit.js';
+import { filterObjectValues, getTypeName } from '../util.js';
 
-const debug = require('debug')('graphbrainz:api/client')
+const debug = createDebug('graphbrainz:api/client');
 
-// If the `request` callback returns an error, it indicates a failure at a lower
-// level than the HTTP response itself. If it's any of the following error
-// codes, we should retry.
-const RETRY_CODES = {
-  ECONNRESET: true,
-  ENOTFOUND: true,
-  ESOCKETTIMEDOUT: true,
-  ETIMEDOUT: true,
-  ECONNREFUSED: true,
-  EHOSTUNREACH: true,
-  EPIPE: true,
-  EAI_AGAIN: true
-}
-
-export class ClientError extends ExtendableError {
-  constructor(message, statusCode) {
-    super(message)
-    this.statusCode = statusCode
-  }
-}
+const { packageJson: pkg } = readPackageUpSync({
+  cwd: fileURLToPath(import.meta.url),
+});
 
 export default class Client {
   constructor({
@@ -33,112 +17,72 @@ export default class Client {
     userAgent = `${pkg.name}/${pkg.version} ` +
       `( ${pkg.homepage || pkg.author.url || pkg.author.email} )`,
     extraHeaders = {},
-    errorClass = ClientError,
     timeout = 60000,
     limit = 1,
     period = 1000,
     concurrency = 10,
-    retries = 10,
-    // It's OK for `retryDelayMin` to be less than one second, even 0, because
-    // `RateLimit` will already make sure we don't exceed the API rate limit.
-    // We're not doing exponential backoff because it will help with being
-    // rate limited, but rather to be chill in case MusicBrainz is returning
-    // some other error or our network is failing.
-    retryDelayMin = 100,
-    retryDelayMax = 60000,
-    randomizeRetry = true
+    retry,
   } = {}) {
-    this.baseURL = baseURL
-    this.userAgent = userAgent
-    this.extraHeaders = extraHeaders
-    this.errorClass = errorClass
-    this.timeout = timeout
-    this.limiter = new RateLimit({ limit, period, concurrency })
-    this.retryOptions = {
-      retries,
-      minTimeout: retryDelayMin,
-      maxTimeout: retryDelayMax,
-      randomize: randomizeRetry
-    }
+    this.baseURL = baseURL;
+    this.userAgent = userAgent;
+    this.extraHeaders = extraHeaders;
+    this.timeout = timeout;
+    this.limiter = new RateLimit({ limit, period, concurrency });
+    this.retryOptions = retry;
+  }
+
+  parseErrorMessage(err) {
+    return err;
   }
 
   /**
-   * Determine if we should retry the request based on the given error.
-   * Retry any 5XX response from MusicBrainz, as well as any error in
-   * `RETRY_CODES`.
-   */
-  shouldRetry(err) {
-    if (err instanceof this.errorClass) {
-      return err.statusCode >= 500 && err.statusCode < 600
-    }
-    return RETRY_CODES[err.code] || false
-  }
-
-  parseErrorMessage(response, body) {
-    return typeof body === 'string' && body ? body : `${response.statusCode}`
-  }
-
-  /**
-   * Send a request without any retrying or rate limiting.
+   * Send a request without any rate limiting.
    * Use `get` instead.
    */
-  _get(path, options = {}, info = {}) {
-    return new Promise((resolve, reject) => {
-      options = {
-        baseUrl: this.baseURL,
-        url: path,
-        gzip: true,
-        timeout: this.timeout,
-        ...options,
-        headers: {
-          'User-Agent': this.userAgent,
-          ...this.extraHeaders,
-          ...options.headers
-        }
+  async _get(path, { searchParams, ...options } = {}) {
+    const url = new URL(path, this.baseURL);
+    if (searchParams) {
+      if (getTypeName(searchParams) === 'Object') {
+        searchParams = filterObjectValues(
+          searchParams,
+          (value) => value != null
+        );
       }
+      const moreSearchParams = new URLSearchParams(searchParams);
+      moreSearchParams.forEach((value, key) => {
+        url.searchParams.set(key, value);
+      });
+    }
+    options = {
+      responseType: 'json',
+      timeout: this.timeout,
+      retry: this.retryOptions,
+      ...options,
+      headers: {
+        'User-Agent': this.userAgent,
+        ...this.extraHeaders,
+        ...options.headers,
+      },
+    };
 
-      const req = request(options, (err, response, body) => {
-        if (err) {
-          debug(`Error: “${err}” url=${req.uri.href}`)
-          reject(err)
-        } else if (response.statusCode >= 400) {
-          const message = this.parseErrorMessage(response, body)
-          debug(`Error: “${message}” url=${req.uri.href}`)
-          const ClientError = this.errorClass
-          reject(new ClientError(message, response.statusCode))
-        } else if (options.method === 'HEAD') {
-          resolve(response.headers)
-        } else {
-          resolve(body)
-        }
-      })
-
-      debug(
-        `Sending request. url=${req.uri.href} attempt=${info.currentAttempt}`
-      )
-    })
+    let response;
+    try {
+      debug(`Sending request. url=%s`, url);
+      response = await got(url.toString(), options);
+      debug(`Success: %s url=%s`, response.statusCode, url);
+      return response;
+    } catch (err) {
+      const parsedError = this.parseErrorMessage(err) || err;
+      debug(`Error: “%s” url=%s`, parsedError, url);
+      throw parsedError;
+    }
   }
 
   /**
-   * Send a request with retrying and rate limiting.
+   * Send a request with rate limiting.
    */
   get(path, options = {}) {
-    return new Promise((resolve, reject) => {
-      const fn = this._get.bind(this)
-      const operation = retry.operation(this.retryOptions)
-      operation.attempt(currentAttempt => {
-        // This will increase the priority in our `RateLimit` queue for each
-        // retry, so that newer requests don't delay this one further.
-        const priority = currentAttempt
-        this.limiter
-          .enqueue(fn, [path, options, { currentAttempt }], priority)
-          .then(resolve)
-          .catch(err => {
-            if (!this.shouldRetry(err) || !operation.retry(err)) {
-              reject(operation.mainError() || err)
-            }
-          })
-      })
-    })
+    const fn = this._get.bind(this);
+    return this.limiter.enqueue(fn, [path, options]);
   }
 }

src/api/index.js

@@ -1,3 +1,3 @@
-import MusicBrainz, { MusicBrainzError } from './musicbrainz'
+import MusicBrainz from './musicbrainz.js';
 
-export { MusicBrainz as default, MusicBrainz, MusicBrainzError }
+export { MusicBrainz as default, MusicBrainz };

src/api/musicbrainz.js

@@ -1,13 +1,18 @@
-import qs from 'qs'
-import Client, { ClientError } from './client'
+import ExtendableError from 'es6-error';
+import Client from './client.js';
+import { filterObjectValues } from '../util.js';
 
-export class MusicBrainzError extends ClientError {}
+export class MusicBrainzError extends ExtendableError {
+  constructor(message, response) {
+    super(message);
+    this.response = response;
+  }
+}
 
 export default class MusicBrainz extends Client {
   constructor({
     baseURL = process.env.MUSICBRAINZ_BASE_URL ||
       'http://musicbrainz.org/ws/2/',
-    errorClass = MusicBrainzError,
     // MusicBrainz API requests are limited to an *average* of 1 req/sec.
     // That means if, for example, we only need to make a few API requests to
     // fulfill a query, we might as well make them all at once - as long as
@@ -18,73 +23,87 @@ export default class MusicBrainz extends Client {
     period = 5500,
     ...options
   } = {}) {
-    super({ baseURL, errorClass, limit, period, ...options })
+    super({ baseURL, limit, period, ...options });
   }
 
-  parseErrorMessage(response, body) {
-    if (body && body.error) {
-      return body.error
+  parseErrorMessage(err) {
+    if (err.name === 'HTTPError') {
+      const { body } = err.response;
+      if (body && body.error) {
+        return new MusicBrainzError(`${body.error}`, err.response);
+      }
     }
-    return super.parseErrorMessage(response, body)
+    return super.parseErrorMessage(err);
+  }
+
+  get(url, options = {}) {
+    options = {
+      resolveBodyOnly: true,
+      ...options,
+      searchParams: {
+        fmt: 'json',
+        ...options.searchParams,
+      },
+    };
+    return super.get(url, options);
   }
 
   stringifyParams(params) {
     if (Array.isArray(params.inc)) {
       params = {
         ...params,
-        inc: params.inc.join('+')
-      }
+        inc: params.inc.join('+'),
+      };
     }
     if (Array.isArray(params.type)) {
       params = {
         ...params,
-        type: params.type.join('|')
-      }
+        type: params.type.join('|'),
+      };
     }
     if (Array.isArray(params.status)) {
       params = {
         ...params,
-        status: params.status.join('|')
-      }
+        status: params.status.join('|'),
+      };
     }
-    return qs.stringify(params, {
-      skipNulls: true,
-      filter: (key, value) => (value === '' ? undefined : value)
-    })
+    return new URLSearchParams(
+      filterObjectValues(params, (value) => value != null && value !== '')
+    ).toString();
   }
 
   getURL(path, params) {
-    const query = params ? this.stringifyParams(params) : ''
-    return query ? `${path}?${query}` : path
+    const query = params ? this.stringifyParams(params) : '';
+    return query ? `${path}?${query}` : path;
   }
 
   getLookupURL(entity, id, params) {
     if (id == null) {
-      return this.getBrowseURL(entity, params)
+      return this.getBrowseURL(entity, params);
     }
-    return this.getURL(`${entity}/${id}`, params)
+    return this.getURL(`${entity}/${id}`, params);
   }
 
   lookup(entity, id, params = {}) {
-    const url = this.getLookupURL(entity, id, params)
-    return this.get(url, { json: true, qs: { fmt: 'json' } })
+    const url = this.getLookupURL(entity, id, params);
+    return this.get(url);
   }
 
   getBrowseURL(entity, params) {
-    return this.getURL(entity, params)
+    return this.getURL(entity, params);
   }
 
   browse(entity, params = {}) {
-    const url = this.getBrowseURL(entity, params)
-    return this.get(url, { json: true, qs: { fmt: 'json' } })
+    const url = this.getBrowseURL(entity, params);
+    return this.get(url);
   }
 
   getSearchURL(entity, query, params) {
-    return this.getURL(entity, { ...params, query })
+    return this.getURL(entity, { ...params, query });
   }
 
   search(entity, query, params = {}) {
-    const url = this.getSearchURL(entity, query, params)
-    return this.get(url, { json: true, qs: { fmt: 'json' } })
+    const url = this.getSearchURL(entity, query, params);
+    return this.get(url);
   }
 }

src/context.js

@@ -1,33 +1,30 @@
-import createLoaders from './loaders'
-import { loadExtension } from './extensions'
+import createLoaders from './loaders.js';
+import createDebug from 'debug';
 
-const debug = require('debug')('graphbrainz:context')
+const debug = createDebug('graphbrainz:context');
 
 export function extendContext(extension, context, options) {
   if (extension.extendContext) {
     if (typeof extension.extendContext === 'function') {
       debug(
-        `Extending context via a function from the “${
-          extension.name
-        }” extension.`
-      )
-      context = extension.extendContext(context, options)
+        `Extending context via a function from the “${extension.name}” extension.`
+      );
+      context = extension.extendContext(context, options);
     } else {
       throw new Error(
         `Extension “${extension.name}” contains an invalid \`extendContext\` ` +
           `value: ${extension.extendContext}`
-      )
+      );
     }
   }
-  return context
+  return context;
 }
 
 export function createContext(options = {}) {
-  const { client } = options
-  const loaders = createLoaders(client)
-  const context = { client, loaders }
-  const { extensions = [] } = options
+  const { client, extensions = [] } = options;
+  const loaders = createLoaders(client);
+  let context = { client, loaders };
   return extensions.reduce((context, extension) => {
-    return extendContext(loadExtension(extension), context, options)
-  }, context)
+    return extendContext(extension, context, options);
+  }, context);
 }

src/extensions/cover-art-archive/client.js

@@ -1,4 +1,12 @@
-import Client from '../../api/client'
+import ExtendableError from 'es6-error';
+import Client from '../../api/client.js';
+
+export class CoverArtArchiveError extends ExtendableError {
+  constructor(message, response) {
+    super(message);
+    this.response = response;
+  }
+}
 
 export default class CoverArtArchiveClient extends Client {
   constructor({
@@ -8,32 +16,40 @@ export default class CoverArtArchiveClient extends Client {
     period = 1000,
     ...options
   } = {}) {
-    super({ baseURL, limit, period, ...options })
+    super({ baseURL, limit, period, ...options });
   }
 
   /**
    * Sinfully attempt to parse HTML responses for the error message.
    */
-  parseErrorMessage(response, body) {
-    if (typeof body === 'string' && body.startsWith('<!')) {
-      const heading = /<h1>([^<]+)<\/h1>/i.exec(body)
-      const message = /<p>([^<]+)<\/p>/i.exec(body)
-      return `${heading ? heading[1] + ': ' : ''}${message ? message[1] : ''}`
+  parseErrorMessage(err) {
+    if (err.name === 'HTTPError') {
+      const { body } = err.response;
+      if (typeof body === 'string' && body.startsWith('<!')) {
+        const heading = /<h1>([^<]+)<\/h1>/i.exec(body);
+        const message = /<p>([^<]+)<\/p>/i.exec(body);
+        return new CoverArtArchiveError(
+          `${heading ? heading[1] + ': ' : ''}${message ? message[1] : ''}`,
+          err.response
+        );
+      }
     }
-    return super.parseErrorMessage(response, body)
+    return super.parseErrorMessage(err);
   }
 
   images(entityType, mbid) {
-    return this.get(`${entityType}/${mbid}`, { json: true })
+    return this.get(`${entityType}/${mbid}`, { resolveBodyOnly: true });
   }
 
-  imageURL(entityType, mbid, typeOrID = 'front', size) {
-    let url = `${entityType}/${mbid}/${typeOrID}`
+  async imageURL(entityType, mbid, typeOrID = 'front', size) {
+    let url = `${entityType}/${mbid}/${typeOrID}`;
     if (size != null) {
-      url += `-${size}`
+      url += `-${size}`;
     }
-    return this.get(url, { method: 'HEAD', followRedirect: false }).then(
-      headers => headers.location
-    )
+    const response = await this.get(url, {
+      method: 'HEAD',
+      followRedirect: false,
+    });
+    return response.headers.location;
   }
 }

src/extensions/cover-art-archive/index.js

@@ -1,27 +1,27 @@
-import schema from './schema'
-import resolvers from './resolvers'
-import createLoaders from './loaders'
-import CoverArtArchiveClient from './client'
-import { ONE_DAY } from '../../util'
+import schema from './schema.js';
+import resolvers from './resolvers.js';
+import createLoaders from './loaders.js';
+import CoverArtArchiveClient from './client.js';
+import { ONE_DAY } from '../../util.js';
 
 export default {
   name: 'Cover Art Archive',
   description: `Retrieve cover art images for releases from the [Cover Art
 Archive](https://coverartarchive.org/).`,
   extendContext(context, { coverArtClient, coverArtArchive = {} } = {}) {
-    const client = coverArtClient || new CoverArtArchiveClient(coverArtArchive)
+    const client = coverArtClient || new CoverArtArchiveClient(coverArtArchive);
     const cacheSize = parseInt(
       process.env.COVER_ART_ARCHIVE_CACHE_SIZE ||
         process.env.GRAPHBRAINZ_CACHE_SIZE ||
         8192,
       10
-    )
+    );
     const cacheTTL = parseInt(
       process.env.COVER_ART_ARCHIVE_CACHE_TTL ||
         process.env.GRAPHBRAINZ_CACHE_TTL ||
         ONE_DAY,
       10
-    )
+    );
     return {
       ...context,
       // Add the client instance directly onto `context` for backwards
@@ -29,12 +29,12 @@ Archive](https://coverartarchive.org/).`,
       coverArtClient: client,
       loaders: {
         ...context.loaders,
-        ...createLoaders({ client, cacheSize, cacheTTL })
-      }
-    }
+        ...createLoaders({ client, cacheSize, cacheTTL }),
+      },
+    };
   },
   extendSchema: {
     schemas: [schema],
-    resolvers
-  }
-}
+    resolvers,
+  },
+};

src/extensions/cover-art-archive/loaders.js

@@ -1,67 +1,68 @@
-import DataLoader from 'dataloader'
-import LRUCache from 'lru-cache'
+import createDebug from 'debug';
+import DataLoader from 'dataloader';
+import LRUCache from 'lru-cache';
 
-const debug = require('debug')('graphbrainz:extensions/cover-art-archive')
+const debug = createDebug('graphbrainz:extensions/cover-art-archive');
 
 export default function createLoaders(options) {
-  const { client } = options
-  const cache = LRUCache({
+  const { client } = options;
+  const cache = new LRUCache({
     max: options.cacheSize,
     maxAge: options.cacheTTL,
     dispose(key) {
-      debug(`Removed from cache. key=${key}`)
-    }
-  })
+      debug(`Removed from cache. key=${key}`);
+    },
+  });
   // Make the cache Map-like.
-  cache.delete = cache.del
-  cache.clear = cache.reset
+  cache.delete = cache.del;
+  cache.clear = cache.reset;
 
   return {
     coverArtArchive: new DataLoader(
-      keys => {
+      (keys) => {
         return Promise.all(
-          keys.map(key => {
-            const [entityType, id] = key
+          keys.map((key) => {
+            const [entityType, id] = key;
             return client
               .images(entityType, id)
-              .catch(err => {
-                if (err.statusCode === 404) {
-                  return { images: [] }
+              .catch((err) => {
+                if (err.response.statusCode === 404) {
+                  return { images: [] };
                 }
-                throw err
+                throw err;
               })
-              .then(coverArt => ({
+              .then((coverArt) => ({
                 ...coverArt,
                 _entityType: entityType,
                 _id: id,
                 _releaseID:
-                  coverArt.release && coverArt.release.split('/').pop()
-              }))
+                  coverArt.release && coverArt.release.split('/').pop(),
+              }));
           })
-        )
+        );
       },
       {
         cacheKeyFn: ([entityType, id]) => `${entityType}/${id}`,
-        cacheMap: cache
+        cacheMap: cache,
       }
     ),
     coverArtArchiveURL: new DataLoader(
-      keys => {
+      (keys) => {
         return Promise.all(
-          keys.map(key => {
-            const [entityType, id, type, size] = key
-            return client.imageURL(entityType, id, type, size)
+          keys.map((key) => {
+            const [entityType, id, type, size] = key;
+            return client.imageURL(entityType, id, type, size);
           })
-        )
+        );
       },
       {
         batch: false,
         cacheKeyFn: ([entityType, id, type, size]) => {
-          const key = `${entityType}/${id}/${type}`
-          return size ? `${key}-${size}` : key
+          const key = `${entityType}/${id}/${type}`;
+          return size ? `${key}-${size}` : key;
         },
-        cacheMap: cache
+        cacheMap: cache,
       }
-    )
-  }
+    ),
+  };
 }

src/extensions/cover-art-archive/resolvers.js

@@ -1,4 +1,4 @@
-import { resolveLookup } from '../../resolvers'
+import { resolveLookup } from '../../resolvers.js';
 
 const SIZES = new Map([
   [null, null],
@@ -6,70 +6,70 @@ const SIZES = new Map([
   [500, 500],
   ['FULL', null],
   ['SMALL', 250],
-  ['LARGE', 500]
-])
+  ['LARGE', 500],
+]);
 
 function resolveImage(coverArt, args, { loaders }, info) {
   // Since migrating the schema to an extension, we lost custom enum values
   // for the time being. Translate any incoming `size` arg to the old enum
   // values.
-  const size = SIZES.get(args.size)
+  const size = SIZES.get(args.size);
   // Field should be `front` or `back`.
-  const field = info.fieldName
+  const field = info.fieldName;
   if (coverArt.images) {
-    const matches = coverArt.images.filter(image => image[field])
+    const matches = coverArt.images.filter((image) => image[field]);
     if (!matches.length) {
-      return null
+      return null;
     } else if (matches.length === 1) {
-      const match = matches[0]
+      const match = matches[0];
       if (size === 250) {
-        return match.thumbnails.small
+        return match.thumbnails.small;
       } else if (size === 500) {
-        return match.thumbnails.large
+        return match.thumbnails.large;
       } else {
-        return match.image
+        return match.image;
       }
     }
   }
-  const entityType = coverArt._entityType
-  const id = coverArt._id
-  const releaseID = coverArt._releaseID
+  const entityType = coverArt._entityType;
+  const id = coverArt._id;
+  const releaseID = coverArt._releaseID;
   if (entityType === 'release-group' && field === 'front') {
     // Release groups only have an endpoint to retrieve the front image.
     // If someone requests the back of a release group, return the back of the
     // release that the release group's cover art response points to.
-    return loaders.coverArtArchiveURL.load(['release-group', id, field, size])
+    return loaders.coverArtArchiveURL.load(['release-group', id, field, size]);
   } else {
-    return loaders.coverArtArchiveURL.load(['release', releaseID, field, size])
+    return loaders.coverArtArchiveURL.load(['release', releaseID, field, size]);
   }
 }
 
 export default {
   CoverArtArchiveImage: {
-    fileID: image => image.id
+    fileID: (image) => image.id,
   },
   CoverArtArchiveRelease: {
     front: resolveImage,
     back: resolveImage,
-    images: coverArt => coverArt.images,
-    artwork: coverArt => coverArt.images.length > 0,
-    count: coverArt => coverArt.images.length,
+    images: (coverArt) => coverArt.images,
+    artwork: (coverArt) => coverArt.images.length > 0,
+    count: (coverArt) => coverArt.images.length,
     release: (coverArt, args, context, info) => {
-      const mbid = coverArt._releaseID
+      const mbid = coverArt._releaseID;
       if (mbid) {
-        return resolveLookup(coverArt, { mbid }, context, info)
+        return resolveLookup(coverArt, { mbid }, context, info);
       }
-      return null
-    }
+      return null;
+    },
   },
   Release: {
     coverArtArchive: (release, args, { loaders }) => {
-      return loaders.coverArtArchive.load(['release', release.id])
-    }
+      return loaders.coverArtArchive.load(['release', release.id]);
+    },
   },
   ReleaseGroup: {
     coverArtArchive: (releaseGroup, args, { loaders }) => {
-      return loaders.coverArtArchive.load(['release-group', releaseGroup.id])
-    }
-  }
-}
+      return loaders.coverArtArchive.load(['release-group', releaseGroup.id]);
+    },
+  },
+};

src/extensions/cover-art-archive/schema.js

@@ -1,4 +1,4 @@
-import gql from '../../tag'
+import gql from '../../tag.js';
 
 export default gql`
   """
@@ -173,4 +173,4 @@ export default gql`
     """
     coverArtArchive: CoverArtArchiveRelease
   }
-`
+`;

src/extensions/fanart-tv/client.js

@@ -1,4 +1,7 @@
-import Client from '../../api/client'
+import ExtendableError from 'es6-error';
+import Client from '../../api/client.js';
+
+export class FanArtError extends ExtendableError {}
 
 export default class FanArtClient extends Client {
   constructor({
@@ -8,53 +11,51 @@ export default class FanArtClient extends Client {
     period = 1000,
     ...options
   } = {}) {
-    super({ baseURL, limit, period, ...options })
-    this.apiKey = apiKey
+    super({ baseURL, limit, period, ...options });
+    this.apiKey = apiKey;
   }
 
   get(path, options = {}) {
-    const ClientError = this.errorClass
     if (!this.apiKey) {
       return Promise.reject(
-        new ClientError('No API key was configured for the fanart.tv client.')
-      )
+        new FanArtError('No API key was configured for the fanart.tv client.')
+      );
     }
     options = {
-      json: true,
+      resolveBodyOnly: true,
       ...options,
-      qs: {
-        ...options.qs,
-        api_key: this.apiKey
-      }
-    }
-    return super.get(path, options)
+      searchParams: {
+        ...options.searchParams,
+        api_key: this.apiKey,
+      },
+    };
+    return super.get(path, options);
   }
 
   musicEntity(entityType, mbid) {
-    const ClientError = this.errorClass
     switch (entityType) {
       case 'artist':
-        return this.musicArtist(mbid)
+        return this.musicArtist(mbid);
       case 'label':
-        return this.musicLabel(mbid)
+        return this.musicLabel(mbid);
       case 'release-group':
-        return this.musicAlbum(mbid)
+        return this.musicAlbum(mbid);
       default:
         return Promise.reject(
-          new ClientError(`Entity type unsupported: ${entityType}`)
-        )
+          new FanArtError(`Entity type unsupported: ${entityType}`)
+        );
     }
   }
 
   musicArtist(mbid) {
-    return this.get(`music/${mbid}`)
+    return this.get(`music/${mbid}`);
   }
 
   musicAlbum(mbid) {
-    return this.get(`music/albums/${mbid}`)
+    return this.get(`music/albums/${mbid}`);
   }
 
   musicLabel(mbid) {
-    return this.get(`music/${mbid}`)
+    return this.get(`music/${mbid}`);
   }
 }

src/extensions/fanart-tv/index.js

@@ -1,37 +1,37 @@
-import schema from './schema'
-import resolvers from './resolvers'
-import createLoader from './loader'
-import FanArtClient from './client'
-import { ONE_DAY } from '../../util'
+import schema from './schema.js';
+import resolvers from './resolvers.js';
+import createLoader from './loader.js';
+import FanArtClient from './client.js';
+import { ONE_DAY } from '../../util.js';
 
 export default {
   name: 'fanart.tv',
   description: `Retrieve high quality artwork for artists, releases, and labels
 from [fanart.tv](https://fanart.tv/).`,
   extendContext(context, { fanArt = {} } = {}) {
-    const client = new FanArtClient(fanArt)
+    const client = new FanArtClient(fanArt);
     const cacheSize = parseInt(
       process.env.FANART_CACHE_SIZE ||
         process.env.GRAPHBRAINZ_CACHE_SIZE ||
         8192,
       10
-    )
+    );
     const cacheTTL = parseInt(
       process.env.FANART_CACHE_TTL ||
         process.env.GRAPHBRAINZ_CACHE_TTL ||
         ONE_DAY,
       10
-    )
+    );
     return {
       ...context,
       loaders: {
         ...context.loaders,
-        fanArt: createLoader({ client, cacheSize, cacheTTL })
-      }
-    }
+        fanArt: createLoader({ client, cacheSize, cacheTTL }),
+      },
+    };
   },
   extendSchema: {
     schemas: [schema],
-    resolvers
-  }
-}
+    resolvers,
+  },
+};

src/extensions/fanart-tv/loader.js

@@ -1,29 +1,30 @@
-import DataLoader from 'dataloader'
-import LRUCache from 'lru-cache'
+import createDebug from 'debug';
+import DataLoader from 'dataloader';
+import LRUCache from 'lru-cache';
 
-const debug = require('debug')('graphbrainz:extensions/fanart-tv')
+const debug = createDebug('graphbrainz:extensions/fanart-tv');
 
 export default function createLoader(options) {
-  const { client } = options
-  const cache = LRUCache({
+  const { client } = options;
+  const cache = new LRUCache({
     max: options.cacheSize,
     maxAge: options.cacheTTL,
     dispose(key) {
-      debug(`Removed from cache. key=${key}`)
-    }
-  })
+      debug(`Removed from cache. key=${key}`);
+    },
+  });
   // Make the cache Map-like.
-  cache.delete = cache.del
-  cache.clear = cache.reset
+  cache.delete = cache.del;
+  cache.clear = cache.reset;
 
   const loader = new DataLoader(
-    keys => {
+    (keys) => {
       return Promise.all(
-        keys.map(key => {
-          const [entityType, id] = key
+        keys.map((key) => {
+          const [entityType, id] = key;
           return client
             .musicEntity(entityType, id)
-            .catch(err => {
+            .catch((err) => {
               if (err.statusCode === 404) {
                 // 404s are OK, just return empty data.
                 return {
@@ -33,32 +34,32 @@ export default function createLoader(options) {
                   hdmusiclogo: [],
                   musicbanner: [],
                   musiclabel: [],
-                  albums: {}
-                }
+                  albums: {},
+                };
               }
-              throw err
+              throw err;
             })
-            .then(body => {
+            .then((body) => {
               if (entityType === 'artist') {
-                const releaseGroupIDs = Object.keys(body.albums || {})
+                const releaseGroupIDs = Object.keys(body.albums || {});
                 debug(
                   `Priming album cache with ${releaseGroupIDs.length} album(s).`
-                )
-                releaseGroupIDs.forEach(key =>
+                );
+                releaseGroupIDs.forEach((key) =>
                   loader.prime(['release-group', key], body)
-                )
+                );
               }
-              return body
-            })
+              return body;
+            });
         })
-      )
+      );
     },
     {
       batch: false,
       cacheKeyFn: ([entityType, id]) => `${entityType}/${id}`,
-      cacheMap: cache
+      cacheMap: cache,
     }
-  )
+  );
 
-  return loader
+  return loader;
 }

src/extensions/fanart-tv/resolvers.js

@@ -1,64 +1,64 @@
 const imageResolvers = {
-  imageID: image => image.id,
+  imageID: (image) => image.id,
   url: (image, args) => {
     return args.size === 'PREVIEW'
       ? image.url.replace('/fanart/', '/preview/')
-      : image.url
+      : image.url;
   },
-  likeCount: image => image.likes
-}
+  likeCount: (image) => image.likes,
+};
 
 export default {
   FanArtImage: {
-    ...imageResolvers
+    ...imageResolvers,
   },
   FanArtDiscImage: {
     ...imageResolvers,
-    discNumber: image => image.disc
+    discNumber: (image) => image.disc,
   },
   FanArtLabelImage: {
     ...imageResolvers,
-    color: image => image.colour
+    color: (image) => image.colour,
   },
   FanArtArtist: {
-    backgrounds: artist => {
-      return artist.artistbackground || []
+    backgrounds: (artist) => {
+      return artist.artistbackground || [];
     },
-    thumbnails: artist => {
-      return artist.artistthumb || []
+    thumbnails: (artist) => {
+      return artist.artistthumb || [];
     },
-    logos: artist => {
-      return artist.musiclogo || []
+    logos: (artist) => {
+      return artist.musiclogo || [];
     },
-    logosHD: artist => {
-      return artist.hdmusiclogo || []
+    logosHD: (artist) => {
+      return artist.hdmusiclogo || [];
+    },
+    banners: (artist) => {
+      return artist.musicbanner || [];
     },
-    banners: artist => {
-      return artist.musicbanner || []
-    }
   },
   FanArtLabel: {
-    logos: label => label.musiclabel || []
+    logos: (label) => label.musiclabel || [],
   },
   FanArtAlbum: {
-    albumCovers: album => album.albumcover || [],
-    discImages: album => album.cdart || []
+    albumCovers: (album) => album.albumcover || [],
+    discImages: (album) => album.cdart || [],
   },
   Artist: {
     fanArt: (artist, args, context) => {
-      return context.loaders.fanArt.load(['artist', artist.id])
-    }
+      return context.loaders.fanArt.load(['artist', artist.id]);
+    },
   },
   Label: {
     fanArt: (label, args, context) => {
-      return context.loaders.fanArt.load(['label', label.id])
-    }
+      return context.loaders.fanArt.load(['label', label.id]);
+    },
   },
   ReleaseGroup: {
     fanArt: (releaseGroup, args, context) => {
       return context.loaders.fanArt
         .load(['release-group', releaseGroup.id])
-        .then(artist => artist.albums[releaseGroup.id])
-    }
-  }
-}
+        .then((artist) => artist.albums[releaseGroup.id]);
+    },
+  },
+};

src/extensions/fanart-tv/schema.js

@@ -1,4 +1,4 @@
-import gql from '../../tag'
+import gql from '../../tag.js';
 
 export default gql`
   """
@@ -194,4 +194,4 @@ export default gql`
     """
     fanArt: FanArtAlbum
   }
-`
+`;

src/extensions/index.js

@@ -1,18 +1,18 @@
-export function loadExtension(extensionModule) {
-  let extension
+export async function loadExtension(extensionModule) {
+  let extension;
   if (typeof extensionModule === 'string') {
-    extension = require(extensionModule)
+    extension = await import(extensionModule);
   } else {
-    extension = extensionModule
+    extension = extensionModule;
   }
   if (extension == null || typeof extension !== 'object') {
     throw new Error(
       `Expected ${extensionModule} to export an extension but instead ` +
         `got: ${extension}`
-    )
+    );
   } else if (extension.default) {
     // ECMAScript module interop.
-    extension = extension.default
+    extension = extension.default;
   }
-  return extension
+  return extension;
 }

src/extensions/mediawiki/client.js

@@ -1,56 +1,54 @@
-import URL from 'url'
-import Client from '../../api/client'
+import ExtendableError from 'es6-error';
+import Client from '../../api/client.js';
+
+export class MediaWikiError extends ExtendableError {}
 
 export default class MediaWikiClient extends Client {
   constructor({ limit = 10, period = 1000, ...options } = {}) {
-    super({ limit, period, ...options })
+    super({ limit, period, ...options });
   }
 
   imageInfo(page) {
-    const pageURL = URL.parse(page, true)
-    const ClientError = this.errorClass
+    const pageURL = new URL(page);
 
     if (!pageURL.pathname.startsWith('/wiki/')) {
       return Promise.reject(
-        new ClientError(
+        new MediaWikiError(
           `MediaWiki page URL does not have the expected /wiki/ prefix: ${page}`
         )
-      )
+      );
     }
 
-    const apiURL = URL.format({
-      protocol: pageURL.protocol,
-      auth: pageURL.auth,
-      host: pageURL.host,
-      pathname: '/w/api.php',
-      query: {
-        action: 'query',
-        titles: decodeURI(pageURL.pathname.slice(6)),
-        prop: 'imageinfo',
-        iiprop: 'url|size|canonicaltitle|user|extmetadata',
-        format: 'json'
-      }
-    })
+    const apiURL = new URL('/w/api.php', pageURL);
+    apiURL.search = new URLSearchParams({
+      action: 'query',
+      titles: decodeURI(pageURL.pathname.slice(6)),
+      prop: 'imageinfo',
+      iiprop: 'url|size|canonicaltitle|user|extmetadata',
+      format: 'json',
+    }).toString();
 
-    return this.get(apiURL, { json: true }).then(body => {
-      const pageIDs = Object.keys(body.query.pages)
-      if (pageIDs.length !== 1) {
-        throw new ClientError(
-          `Query returned multiple pages: [${pageIDs.join(', ')}]`
-        )
+    return this.get(apiURL.toString(), { resolveBodyOnly: true }).then(
+      (body) => {
+        const pageIDs = Object.keys(body.query.pages);
+        if (pageIDs.length !== 1) {
+          throw new MediaWikiError(
+            `Query returned multiple pages: [${pageIDs.join(', ')}]`
+          );
+        }
+        if (pageIDs[0] === '-1') {
+          throw new MediaWikiError(
+            body.query.pages['-1'].invalidreason || 'Unknown error'
+          );
+        }
+        const imageInfo = body.query.pages[pageIDs[0]].imageinfo;
+        if (imageInfo.length !== 1) {
+          throw new MediaWikiError(
+            `Query returned info for ${imageInfo.length} images, expected 1.`
+          );
+        }
+        return imageInfo[0];
       }
-      if (pageIDs[0] === '-1') {
-        throw new ClientError(
-          body.query.pages['-1'].invalidreason || 'Unknown error'
-        )
-      }
-      const imageInfo = body.query.pages[pageIDs[0]].imageinfo
-      if (imageInfo.length !== 1) {
-        throw new ClientError(
-          `Query returned info for ${imageInfo.length} images, expected 1.`
-        )
-      }
-      return imageInfo[0]
-    })
+    );
   }
 }

src/extensions/mediawiki/index.js

@@ -1,37 +1,37 @@
-import schema from './schema'
-import resolvers from './resolvers'
-import createLoader from './loader'
-import MediaWikiClient from './client'
-import { ONE_DAY } from '../../util'
+import schema from './schema.js';
+import resolvers from './resolvers.js';
+import createLoader from './loader.js';
+import MediaWikiClient from './client.js';
+import { ONE_DAY } from '../../util.js';
 
 export default {
   name: 'MediaWiki',
   description: `Retrieve information from MediaWiki image pages, like the actual
 image file URL and EXIF metadata.`,
   extendContext(context, { mediaWiki = {} } = {}) {
-    const client = new MediaWikiClient(mediaWiki)
+    const client = new MediaWikiClient(mediaWiki);
     const cacheSize = parseInt(
       process.env.MEDIAWIKI_CACHE_SIZE ||
         process.env.GRAPHBRAINZ_CACHE_SIZE ||
         8192,
       10
-    )
+    );
     const cacheTTL = parseInt(
       process.env.MEDIAWIKI_CACHE_TTL ||
         process.env.GRAPHBRAINZ_CACHE_TTL ||
         ONE_DAY,
       10
-    )
+    );
     return {
       ...context,
       loaders: {
         ...context.loaders,
-        mediaWiki: createLoader({ client, cacheSize, cacheTTL })
-      }
-    }
+        mediaWiki: createLoader({ client, cacheSize, cacheTTL }),
+      },
+    };
   },
   extendSchema: {
     schemas: [schema],
-    resolvers
-  }
-}
+    resolvers,
+  },
+};

src/extensions/mediawiki/loader.js

@@ -1,25 +1,30 @@
-import DataLoader from 'dataloader'
-import LRUCache from 'lru-cache'
+import createDebug from 'debug';
+import DataLoader from 'dataloader';
+import LRUCache from 'lru-cache';
 
-const debug = require('debug')('graphbrainz:extensions/mediawiki')
+const debug = createDebug('graphbrainz:extensions/mediawiki');
 
 export default function createLoader(options) {
-  const { client } = options
-  const cache = LRUCache({
+  const { client } = options;
+  const cache = new LRUCache({
     max: options.cacheSize,
     maxAge: options.cacheTTL,
     dispose(key) {
-      debug(`Removed from cache. key=${key}`)
-    }
-  })
+      debug(`Removed from cache. key=${key}`);
+    },
+  });
   // Make the cache Map-like.
-  cache.delete = cache.del
-  cache.clear = cache.reset
+  cache.delete = cache.del;
+  cache.clear = cache.reset;
 
   return new DataLoader(
-    keys => {
-      return Promise.all(keys.map(key => client.imageInfo(key)))
+    (keys) => {
+      return Promise.allSettled(
+        keys.map((key) => client.imageInfo(key))
+      ).then((results) =>
+        results.map((result) => result.reason || result.value)
+      );
     },
     { batch: false, cacheMap: cache }
-  )
+  );
 }

src/extensions/mediawiki/resolvers.js

@@ -1,84 +1,80 @@
-import URL from 'url'
-
-function resolveMediaWikiImages(source, args, { loaders }) {
-  const isURL = relation => relation['target-type'] === 'url'
-  let rels = source.relations ? source.relations.filter(isURL) : []
+async function resolveMediaWikiImages(source, args, { loaders }) {
+  const isURL = (relation) => relation['target-type'] === 'url';
+  let rels = source.relations ? source.relations.filter(isURL) : [];
   if (!rels.length) {
-    rels = loaders.lookup
+    rels = await loaders.lookup
       .load([source._type, source.id, { inc: 'url-rels' }])
-      .then(source => source.relations.filter(isURL))
+      .then((source) => source.relations.filter(isURL));
   }
-  return Promise.resolve(rels).then(rels => {
-    const pages = rels
-      .filter(rel => {
-        if (rel.type === args.type) {
-          const url = URL.parse(rel.url.resource)
-          if (url.pathname.match(/^\/wiki\/(File|Image):/)) {
-            return true
-          }
+  const pages = rels
+    .filter((rel) => {
+      if (rel.type === args.type) {
+        const url = new URL(rel.url.resource);
+        if (url.pathname.match(/^\/wiki\/(File|Image):/)) {
+          return true;
         }
-        return false
-      })
-      .map(rel => rel.url.resource)
-    return loaders.mediaWiki.loadMany(pages)
-  })
+      }
+      return false;
+    })
+    .map((rel) => rel.url.resource);
+  return Promise.all(pages.map((page) => loaders.mediaWiki.load(page)));
 }
 
 export default {
   MediaWikiImage: {
-    descriptionURL: imageInfo => imageInfo.descriptionurl,
-    canonicalTitle: imageInfo => imageInfo.canonicaltitle,
-    objectName: imageInfo => {
-      const data = imageInfo.extmetadata.ObjectName
-      return data ? data.value : null
+    descriptionURL: (imageInfo) => imageInfo.descriptionurl,
+    canonicalTitle: (imageInfo) => imageInfo.canonicaltitle,
+    objectName: (imageInfo) => {
+      const data = imageInfo.extmetadata.ObjectName;
+      return data ? data.value : null;
     },
-    descriptionHTML: imageInfo => {
-      const data = imageInfo.extmetadata.ImageDescription
-      return data ? data.value : null
+    descriptionHTML: (imageInfo) => {
+      const data = imageInfo.extmetadata.ImageDescription;
+      return data ? data.value : null;
     },
-    originalDateTimeHTML: imageInfo => {
-      const data = imageInfo.extmetadata.DateTimeOriginal
-      return data ? data.value : null
+    originalDateTimeHTML: (imageInfo) => {
+      const data = imageInfo.extmetadata.DateTimeOriginal;
+      return data ? data.value : null;
     },
-    categories: imageInfo => {
-      const data = imageInfo.extmetadata.Categories
-      return data ? data.value.split('|') : []
+    categories: (imageInfo) => {
+      const data = imageInfo.extmetadata.Categories;
+      return data ? data.value.split('|') : [];
     },
-    artistHTML: imageInfo => {
-      const data = imageInfo.extmetadata.Artist
-      return data ? data.value : null
+    artistHTML: (imageInfo) => {
+      const data = imageInfo.extmetadata.Artist;
+      return data ? data.value : null;
     },
-    creditHTML: imageInfo => {
-      const data = imageInfo.extmetadata.Credit
-      return data ? data.value : null
+    creditHTML: (imageInfo) => {
+      const data = imageInfo.extmetadata.Credit;
+      return data ? data.value : null;
     },
-    licenseShortName: imageInfo => {
-      const data = imageInfo.extmetadata.LicenseShortName
-      return data ? data.value : null
+    licenseShortName: (imageInfo) => {
+      const data = imageInfo.extmetadata.LicenseShortName;
+      return data ? data.value : null;
     },
-    licenseURL: imageInfo => {
-      const data = imageInfo.extmetadata.LicenseUrl
-      return data ? data.value : null
+    licenseURL: (imageInfo) => {
+      const data = imageInfo.extmetadata.LicenseUrl;
+      return data ? data.value : null;
     },
-    metadata: imageInfo =>
-      Object.keys(imageInfo.extmetadata).map(key => {
-        const data = imageInfo.extmetadata[key]
-        return { ...data, name: key }
-      })
+    metadata: (imageInfo) =>
+      Object.keys(imageInfo.extmetadata).map((key) => {
+        const data = imageInfo.extmetadata[key];
+        return { ...data, name: key };
+      }),
   },
   MediaWikiImageMetadata: {
-    value: obj => (obj.value == null ? obj.value : `${obj.value}`)
+    value: (obj) => (obj.value == null ? obj.value : `${obj.value}`),
   },
   Artist: {
-    mediaWikiImages: resolveMediaWikiImages
+    mediaWikiImages: resolveMediaWikiImages,
   },
   Instrument: {
-    mediaWikiImages: resolveMediaWikiImages
+    mediaWikiImages: resolveMediaWikiImages,
   },
   Label: {
-    mediaWikiImages: resolveMediaWikiImages
+    mediaWikiImages: resolveMediaWikiImages,
   },
   Place: {
-    mediaWikiImages: resolveMediaWikiImages
-  }
-}
+    mediaWikiImages: resolveMediaWikiImages,
+  },
+};

src/extensions/mediawiki/schema.js

@@ -1,4 +1,4 @@
-import gql from '../../tag'
+import gql from '../../tag.js';
 
 export default gql`
   """
@@ -165,4 +165,4 @@ export default gql`
       type: String = "image"
     ): [MediaWikiImage]!
   }
-`
+`;

src/extensions/the-audio-db/client.js

@@ -1,4 +1,7 @@
-import Client from '../../api/client'
+import ExtendableError from 'es6-error';
+import Client from '../../api/client.js';
+
+export class TheAudioDBError extends ExtendableError {}
 
 export default class TheAudioDBClient extends Client {
   constructor({
@@ -9,66 +12,67 @@ export default class TheAudioDBClient extends Client {
     period = 1000,
     ...options
   } = {}) {
-    super({ baseURL, limit, period, ...options })
-    this.apiKey = apiKey
+    super({ baseURL, limit, period, ...options });
+    this.apiKey = apiKey;
   }
 
   get(path, options = {}) {
-    const ClientError = this.errorClass
     if (!this.apiKey) {
       return Promise.reject(
-        new ClientError('No API key was configured for TheAudioDB client.')
-      )
+        new TheAudioDBError('No API key was configured for TheAudioDB client.')
+      );
     }
     return super.get(`${this.apiKey}/${path}`, {
-      json: true,
-      // FIXME: TheAudioDB's SSL terminator seems to be broken and only works
-      // by forcing TLS 1.0.
-      agentOptions: { secureProtocol: 'TLSv1_method' },
-      ...options
-    })
+      resolveBodyOnly: true,
+      ...options,
+    });
   }
 
   entity(entityType, mbid) {
-    const ClientError = this.errorClass
     switch (entityType) {
       case 'artist':
-        return this.artist(mbid)
+        return this.artist(mbid);
       case 'release-group':
-        return this.album(mbid)
+        return this.album(mbid);
       case 'recording':
-        return this.track(mbid)
+        return this.track(mbid);
       default:
         return Promise.reject(
-          new ClientError(`Entity type unsupported: ${entityType}`)
-        )
+          new TheAudioDBError(`Entity type unsupported: ${entityType}`)
+        );
     }
   }
 
   artist(mbid) {
-    return this.get('artist-mb.php', { qs: { i: mbid } }).then(body => {
-      if (body.artists && body.artists.length === 1) {
-        return body.artists[0]
+    return this.get('artist-mb.php', { searchParams: { i: mbid } }).then(
+      (body) => {
+        if (body.artists && body.artists.length === 1) {
+          return body.artists[0];
+        }
+        return null;
       }
-      return null
-    })
+    );
   }
 
   album(mbid) {
-    return this.get('album-mb.php', { qs: { i: mbid } }).then(body => {
-      if (body.album && body.album.length === 1) {
-        return body.album[0]
+    return this.get('album-mb.php', { searchParams: { i: mbid } }).then(
+      (body) => {
+        if (body.album && body.album.length === 1) {
+          return body.album[0];
+        }
+        return null;
       }
-      return null
-    })
+    );
   }
 
   track(mbid) {
-    return this.get('track-mb.php', { qs: { i: mbid } }).then(body => {
-      if (body.track && body.track.length === 1) {
-        return body.track[0]
+    return this.get('track-mb.php', { searchParams: { i: mbid } }).then(
+      (body) => {
+        if (body.track && body.track.length === 1) {
+          return body.track[0];
+        }
+        return null;
       }
-      return null
-    })
+    );
   }
 }

src/extensions/the-audio-db/index.js

@@ -1,37 +1,37 @@
-import schema from './schema'
-import resolvers from './resolvers'
-import createLoader from './loader'
-import TheAudioDBClient from './client'
-import { ONE_DAY } from '../../util'
+import schema from './schema.js';
+import resolvers from './resolvers.js';
+import createLoader from './loader.js';
+import TheAudioDBClient from './client.js';
+import { ONE_DAY } from '../../util.js';
 
 export default {
   name: 'TheAudioDB',
   description: `Retrieve images and information about artists, releases, and
 recordings from [TheAudioDB.com](http://www.theaudiodb.com/).`,
   extendContext(context, { theAudioDB = {} } = {}) {
-    const client = new TheAudioDBClient(theAudioDB)
+    const client = new TheAudioDBClient(theAudioDB);
     const cacheSize = parseInt(
       process.env.THEAUDIODB_CACHE_SIZE ||
         process.env.GRAPHBRAINZ_CACHE_SIZE ||
         8192,
       10
-    )
+    );
     const cacheTTL = parseInt(
       process.env.THEAUDIODB_CACHE_TTL ||
         process.env.GRAPHBRAINZ_CACHE_TTL ||
         ONE_DAY,
       10
-    )
+    );
     return {
       ...context,
       loaders: {
         ...context.loaders,
-        theAudioDB: createLoader({ client, cacheSize, cacheTTL })
-      }
-    }
+        theAudioDB: createLoader({ client, cacheSize, cacheTTL }),
+      },
+    };
   },
   extendSchema: {
     schemas: [schema],
-    resolvers
-  }
-}
+    resolvers,
+  },
+};

src/extensions/the-audio-db/loader.js

@@ -1,34 +1,35 @@
-import DataLoader from 'dataloader'
-import LRUCache from 'lru-cache'
+import createDebug from 'debug';
+import DataLoader from 'dataloader';
+import LRUCache from 'lru-cache';
 
-const debug = require('debug')('graphbrainz:extensions/the-audio-db')
+const debug = createDebug('graphbrainz:extensions/the-audio-db');
 
 export default function createLoader(options) {
-  const { client } = options
-  const cache = LRUCache({
+  const { client } = options;
+  const cache = new LRUCache({
     max: options.cacheSize,
     maxAge: options.cacheTTL,
     dispose(key) {
-      debug(`Removed from cache. key=${key}`)
-    }
-  })
+      debug(`Removed from cache. key=${key}`);
+    },
+  });
   // Make the cache Map-like.
-  cache.delete = cache.del
-  cache.clear = cache.reset
+  cache.delete = cache.del;
+  cache.clear = cache.reset;
 
   return new DataLoader(
-    keys => {
+    (keys) => {
       return Promise.all(
-        keys.map(key => {
-          const [entityType, id] = key
-          return client.entity(entityType, id)
+        keys.map((key) => {
+          const [entityType, id] = key;
+          return client.entity(entityType, id);
         })
-      )
+      );
     },
     {
       batch: false,
       cacheKeyFn: ([entityType, id]) => `${entityType}/${id}`,
-      cacheMap: cache
+      cacheMap: cache,
     }
-  )
+  );
 }

src/extensions/the-audio-db/resolvers.js

@@ -1,115 +1,118 @@
 function handleImageSize(resolver) {
   return (source, args, context, info) => {
-    const getURL = url => (args.size === 'PREVIEW' ? `${url}/preview` : url)
-    const url = resolver(source, args, context, info)
+    const getURL = (url) => (args.size === 'PREVIEW' ? `${url}/preview` : url);
+    const url = resolver(source, args, context, info);
     if (!url) {
-      return null
+      return null;
     } else if (Array.isArray(url)) {
-      return url.map(getURL)
+      return url.map(getURL);
     } else {
-      return getURL(url)
+      return getURL(url);
     }
-  }
+  };
 }
 
 export default {
   TheAudioDBArtist: {
-    artistID: artist => artist.idArtist,
+    artistID: (artist) => artist.idArtist,
     biography: (artist, args) => {
-      const lang = args.lang.toUpperCase()
-      return artist[`strBiography${lang}`] || null
+      const lang = args.lang.toUpperCase();
+      return artist[`strBiography${lang}`] || null;
     },
-    memberCount: artist => artist.intMembers,
-    banner: handleImageSize(artist => artist.strArtistBanner),
-    fanArt: handleImageSize(artist => {
+    memberCount: (artist) => artist.intMembers,
+    banner: handleImageSize((artist) => artist.strArtistBanner),
+    fanArt: handleImageSize((artist) => {
       return [
         artist.strArtistFanart,
         artist.strArtistFanart2,
-        artist.strArtistFanart3
-      ].filter(Boolean)
+        artist.strArtistFanart3,
+      ].filter(Boolean);
     }),
-    logo: handleImageSize(artist => artist.strArtistLogo),
-    thumbnail: handleImageSize(artist => artist.strArtistThumb),
-    genre: artist => artist.strGenre || null,
-    mood: artist => artist.strMood || null,
-    style: artist => artist.strStyle || null
+    logo: handleImageSize((artist) => artist.strArtistLogo),
+    thumbnail: handleImageSize((artist) => artist.strArtistThumb),
+    genre: (artist) => artist.strGenre || null,
+    mood: (artist) => artist.strMood || null,
+    style: (artist) => artist.strStyle || null,
   },
   TheAudioDBAlbum: {
-    albumID: album => album.idAlbum,
-    artistID: album => album.idArtist,
+    albumID: (album) => album.idAlbum,
+    artistID: (album) => album.idArtist,
     description: (album, args) => {
-      const lang = args.lang.toUpperCase()
-      return album[`strDescription${lang}`] || null
+      const lang = args.lang.toUpperCase();
+      return album[`strDescription${lang}`] || null;
     },
-    salesCount: album => album.intSales,
-    score: album => album.intScore,
-    scoreVotes: album => album.intScoreVotes,
-    discImage: handleImageSize(album => album.strAlbumCDart),
-    spineImage: handleImageSize(album => album.strAlbumSpine),
-    frontImage: handleImageSize(album => album.strAlbumThumb),
-    backImage: handleImageSize(album => album.strAlbumThumbBack),
-    review: album => album.strReview || null,
-    genre: album => album.strGenre || null,
-    mood: album => album.strMood || null,
-    style: album => album.strStyle || null,
-    speed: album => album.strSpeed || null,
-    theme: album => album.strTheme || null
+    salesCount: (album) => album.intSales,
+    score: (album) => album.intScore,
+    scoreVotes: (album) => album.intScoreVotes,
+    discImage: handleImageSize((album) => album.strAlbumCDart),
+    spineImage: handleImageSize((album) => album.strAlbumSpine),
+    frontImage: handleImageSize((album) => album.strAlbumThumb),
+    backImage: handleImageSize((album) => album.strAlbumThumbBack),
+    review: (album) => album.strReview || null,
+    genre: (album) => album.strGenre || null,
+    mood: (album) => album.strMood || null,
+    style: (album) => album.strStyle || null,
+    speed: (album) => album.strSpeed || null,
+    theme: (album) => album.strTheme || null,
   },
   TheAudioDBTrack: {
-    trackID: track => track.idTrack,
-    albumID: track => track.idAlbum,
-    artistID: track => track.idArtist,
+    trackID: (track) => track.idTrack,
+    albumID: (track) => track.idAlbum,
+    artistID: (track) => track.idArtist,
     description: (track, args) => {
-      const lang = args.lang.toUpperCase()
-      return track[`strDescription${lang}`] || null
+      const lang = args.lang.toUpperCase();
+      return track[`strDescription${lang}`] || null;
     },
-    thumbnail: handleImageSize(track => track.strTrackThumb),
-    score: track => track.intScore,
-    scoreVotes: track => track.intScoreVotes,
-    trackNumber: track => track.intTrackNumber,
-    musicVideo: track => track,
-    genre: track => track.strGenre || null,
-    mood: track => track.strMood || null,
-    style: track => track.strStyle || null,
-    theme: track => track.strTheme || null
+    thumbnail: handleImageSize((track) => track.strTrackThumb),
+    score: (track) => track.intScore,
+    scoreVotes: (track) => track.intScoreVotes,
+    trackNumber: (track) => track.intTrackNumber,
+    musicVideo: (track) => track,
+    genre: (track) => track.strGenre || null,
+    mood: (track) => track.strMood || null,
+    style: (track) => track.strStyle || null,
+    theme: (track) => track.strTheme || null,
   },
   TheAudioDBMusicVideo: {
-    url: track => {
-      let url = track.strMusicVid || null
+    url: (track) => {
+      let url = track.strMusicVid || null;
       // Many of these are missing the protocol and start with www, so add it
       // in that case.
       if (url && url.startsWith('www.')) {
-        url = `https://${url}`
+        url = `https://${url}`;
       }
-      return url
+      return url;
     },
-    companyName: track => track.strMusicVidCompany || null,
-    directorName: track => track.strMusicVidDirector || null,
-    screenshots: handleImageSize(track => {
+    companyName: (track) => track.strMusicVidCompany || null,
+    directorName: (track) => track.strMusicVidDirector || null,
+    screenshots: handleImageSize((track) => {
       return [
         track.strMusicVidScreen1,
         track.strMusicVidScreen2,
-        track.strMusicVidScreen3
-      ].filter(Boolean)
+        track.strMusicVidScreen3,
+      ].filter(Boolean);
     }),
-    viewCount: track => track.intMusicVidViews,
-    likeCount: track => track.intMusicVidLikes,
-    dislikeCount: track => track.intMusicVidDislikes,
-    commentCount: track => track.intMusicVidComments
+    viewCount: (track) => track.intMusicVidViews,
+    likeCount: (track) => track.intMusicVidLikes,
+    dislikeCount: (track) => track.intMusicVidDislikes,
+    commentCount: (track) => track.intMusicVidComments,
   },
   Artist: {
     theAudioDB: (artist, args, context) => {
-      return context.loaders.theAudioDB.load(['artist', artist.id])
-    }
+      return context.loaders.theAudioDB.load(['artist', artist.id]);
+    },
   },
   Recording: {
     theAudioDB: (recording, args, context) => {
-      return context.loaders.theAudioDB.load(['recording', recording.id])
-    }
+      return context.loaders.theAudioDB.load(['recording', recording.id]);
+    },
   },
   ReleaseGroup: {
     theAudioDB: (releaseGroup, args, context) => {
-      return context.loaders.theAudioDB.load(['release-group', releaseGroup.id])
-    }
-  }
-}
+      return context.loaders.theAudioDB.load([
+        'release-group',
+        releaseGroup.id,
+      ]);
+    },
+  },
+};

src/extensions/the-audio-db/schema.js

@@ -1,4 +1,4 @@
-import gql from '../../tag'
+import gql from '../../tag.js';
 
 export default gql`
   """
@@ -369,4 +369,4 @@ export default gql`
     """
     theAudioDB: TheAudioDBAlbum
   }
-`
+`;

src/index.js

@@ -1,71 +1,104 @@
-import express from 'express'
-import graphqlHTTP from 'express-graphql'
-import compression from 'compression'
-import cors from 'cors'
-import MusicBrainz from './api'
-import schema, { createSchema } from './schema'
-import { createContext } from './context'
+import express from 'express';
+import ExpressGraphQL from 'express-graphql';
+import compression from 'compression';
+import cors from 'cors';
+import MusicBrainz from './api/index.js';
+import Client from './api/client.js';
+import { baseSchema, createSchema } from './schema.js';
+import { createContext } from './context.js';
+import { loadExtension } from './extensions/index.js';
+import gql from './tag.js';
 
-const formatError = err => ({
+const { graphqlHTTP } = ExpressGraphQL;
+
+const formatError = (err) => ({
   message: err.message,
   locations: err.locations,
-  stack: err.stack
-})
+  stack: err.stack,
+});
 
-export const defaultExtensions = [
-  require.resolve('./extensions/cover-art-archive'),
-  require.resolve('./extensions/fanart-tv'),
-  require.resolve('./extensions/mediawiki'),
-  require.resolve('./extensions/the-audio-db')
-]
+const defaultExtensions = [
+  'graphbrainz/extensions/cover-art-archive',
+  'graphbrainz/extensions/fanart-tv',
+  'graphbrainz/extensions/mediawiki',
+  'graphbrainz/extensions/the-audio-db',
+];
 
-const middleware = ({
+function middleware({
   client = new MusicBrainz(),
   extensions = process.env.GRAPHBRAINZ_EXTENSIONS
     ? JSON.parse(process.env.GRAPHBRAINZ_EXTENSIONS)
     : defaultExtensions,
   ...middlewareOptions
-} = {}) => {
-  const options = { client, extensions, ...middlewareOptions }
-  const DEV = process.env.NODE_ENV !== 'production'
-  const graphiql = DEV || process.env.GRAPHBRAINZ_GRAPHIQL === 'true'
-  return graphqlHTTP({
-    schema: createSchema(schema, options),
-    context: createContext(options),
-    pretty: DEV,
-    graphiql,
-    formatError: DEV ? formatError : undefined,
-    ...middlewareOptions
-  })
+} = {}) {
+  const DEV = process.env.NODE_ENV !== 'production';
+  const graphiql = DEV || process.env.GRAPHBRAINZ_GRAPHIQL === 'true';
+  const getAsyncMiddleware = async () => {
+    const loadedExtensions = await Promise.all(
+      extensions.map((extensionSpecifier) => loadExtension(extensionSpecifier))
+    );
+    const options = {
+      client,
+      extensions: loadedExtensions,
+      ...middlewareOptions,
+    };
+    const schema = createSchema(baseSchema, options);
+    const context = createContext(options);
+    return graphqlHTTP({
+      schema,
+      context,
+      pretty: DEV,
+      graphiql,
+      customFormatErrorFn: DEV ? formatError : undefined,
+      ...middlewareOptions,
+    });
+  };
+  const asyncMiddleware = getAsyncMiddleware();
+  return async (req, res, next) => {
+    try {
+      const middleware = await asyncMiddleware;
+      middleware(req, res, next);
+    } catch (err) {
+      next(err);
+    }
+  };
 }
 
-export default middleware
-
-export function start(options) {
-  require('dotenv').config({ silent: true })
-  const app = express()
-  const port = process.env.PORT || 3000
-  const route = process.env.GRAPHBRAINZ_PATH || '/'
+async function start(options) {
+  const dotenv = await import('dotenv');
+  dotenv.config({ silent: true });
+  const app = express();
+  const port = process.env.PORT || 3000;
+  const route = process.env.GRAPHBRAINZ_PATH || '/';
   const corsOptions = {
     origin: process.env.GRAPHBRAINZ_CORS_ORIGIN || false,
-    methods: 'HEAD,GET,POST'
-  }
+    methods: 'HEAD,GET,POST',
+  };
   switch (corsOptions.origin) {
     case 'true':
-      corsOptions.origin = true
-      break
+      corsOptions.origin = true;
+      break;
     case 'false':
-      corsOptions.origin = false
-      break
+      corsOptions.origin = false;
+      break;
     default:
-      break
+      break;
   }
-  app.use(compression())
-  app.use(route, cors(corsOptions), middleware(options))
-  app.listen(port)
-  console.log(`Listening on port ${port}.`)
+  app.use(compression());
+  app.use(route, cors(corsOptions), middleware(options));
+  app.listen(port);
+  console.log(`Listening on port ${port}.`);
 }
 
-if (require.main === module) {
-  start()
-}
+export {
+  Client,
+  MusicBrainz,
+  gql,
+  baseSchema,
+  createContext,
+  createSchema,
+  defaultExtensions,
+  loadExtension,
+  middleware,
+  start,
+};

src/loaders.js

@@ -1,92 +1,92 @@
-import DataLoader from 'dataloader'
-import LRUCache from 'lru-cache'
-import { toPlural } from './types/helpers'
-import { ONE_DAY } from './util'
+import createDebug from 'debug';
+import DataLoader from 'dataloader';
+import LRUCache from 'lru-cache';
+import { ONE_DAY, toPlural } from './util.js';
 
-const debug = require('debug')('graphbrainz:loaders')
+const debug = createDebug('graphbrainz:loaders');
 
 export default function createLoaders(client) {
   // All loaders share a single LRU cache that will remember 8192 responses,
   // each cached for 1 day.
-  const cache = LRUCache({
+  const cache = new LRUCache({
     max: parseInt(process.env.GRAPHBRAINZ_CACHE_SIZE || 8192, 10),
     maxAge: parseInt(process.env.GRAPHBRAINZ_CACHE_TTL || ONE_DAY, 10),
     dispose(key) {
-      debug(`Removed from cache. key=${key}`)
-    }
-  })
+      debug(`Removed from cache. key=${key}`);
+    },
+  });
   // Make the cache Map-like.
-  cache.delete = cache.del
-  cache.clear = cache.reset
+  cache.delete = cache.del;
+  cache.clear = cache.reset;
 
   const lookup = new DataLoader(
-    keys => {
+    (keys) => {
       return Promise.all(
-        keys.map(key => {
-          const [entityType, id, params = {}] = key
-          return client.lookup(entityType, id, params).then(entity => {
+        keys.map((key) => {
+          const [entityType, id, params = {}] = key;
+          return client.lookup(entityType, id, params).then((entity) => {
             if (entity) {
               // Store the entity type so we can determine what type of object this
               // is elsewhere in the code.
-              entity._type = entityType
+              entity._type = entityType;
             }
-            return entity
-          })
+            return entity;
+          });
         })
-      )
+      );
     },
     {
       batch: false,
-      cacheKeyFn: key => client.getLookupURL(...key),
-      cacheMap: cache
+      cacheKeyFn: (key) => client.getLookupURL(...key),
+      cacheMap: cache,
     }
-  )
+  );
 
   const browse = new DataLoader(
-    keys => {
+    (keys) => {
       return Promise.all(
-        keys.map(key => {
-          const [entityType, params = {}] = key
-          return client.browse(entityType, params).then(list => {
-            list[toPlural(entityType)].forEach(entity => {
+        keys.map((key) => {
+          const [entityType, params = {}] = key;
+          return client.browse(entityType, params).then((list) => {
+            list[toPlural(entityType)].forEach((entity) => {
               // Store the entity type so we can determine what type of object this
               // is elsewhere in the code.
-              entity._type = entityType
-            })
-            return list
-          })
+              entity._type = entityType;
+            });
+            return list;
+          });
         })
-      )
+      );
     },
     {
       batch: false,
-      cacheKeyFn: key => client.getBrowseURL(...key),
-      cacheMap: cache
+      cacheKeyFn: (key) => client.getBrowseURL(...key),
+      cacheMap: cache,
     }
-  )
+  );
 
   const search = new DataLoader(
-    keys => {
+    (keys) => {
       return Promise.all(
-        keys.map(key => {
-          const [entityType, query, params = {}] = key
-          return client.search(entityType, query, params).then(list => {
-            list[toPlural(entityType)].forEach(entity => {
+        keys.map((key) => {
+          const [entityType, query, params = {}] = key;
+          return client.search(entityType, query, params).then((list) => {
+            list[toPlural(entityType)].forEach((entity) => {
               // Store the entity type so we can determine what type of object this
               // is elsewhere in the code.
-              entity._type = entityType
-            })
-            return list
-          })
+              entity._type = entityType;
+            });
+            return list;
+          });
         })
-      )
+      );
     },
     {
       batch: false,
-      cacheKeyFn: key => client.getSearchURL(...key),
-      cacheMap: cache
+      cacheKeyFn: (key) => client.getSearchURL(...key),
+      cacheMap: cache,
     }
-  )
+  );
 
-  return { lookup, browse, search }
+  return { lookup, browse, search };
 }

src/queries/browse.js

@@ -1,6 +1,6 @@
-import { GraphQLObjectType, GraphQLString } from 'graphql'
-import { forwardConnectionArgs } from 'graphql-relay'
-import { resolveBrowse } from '../resolvers'
+import GraphQL from 'graphql';
+import GraphQLRelay from 'graphql-relay';
+import { resolveBrowse } from '../resolvers.js';
 import {
   MBID,
   AreaConnection,
@@ -15,62 +15,66 @@ import {
   RecordingConnection,
   ReleaseConnection,
   ReleaseGroupConnection,
-  WorkConnection
-} from '../types'
-import { toWords, releaseGroupType, releaseStatus } from '../types/helpers'
+  WorkConnection,
+} from '../types/index.js';
+import { releaseGroupType, releaseStatus } from '../types/helpers.js';
+import { toWords } from '../util.js';
+
+const { GraphQLObjectType, GraphQLString } = GraphQL;
+const { forwardConnectionArgs } = GraphQLRelay;
 
 const area = {
   type: MBID,
-  description: 'The MBID of an area to which the entity is linked.'
-}
+  description: 'The MBID of an area to which the entity is linked.',
+};
 const artist = {
   type: MBID,
-  description: 'The MBID of an artist to which the entity is linked.'
-}
+  description: 'The MBID of an artist to which the entity is linked.',
+};
 const collection = {
   type: MBID,
-  description: 'The MBID of a collection in which the entity is found.'
-}
+  description: 'The MBID of a collection in which the entity is found.',
+};
 const event = {
   type: MBID,
-  description: 'The MBID of an event to which the entity is linked.'
-}
+  description: 'The MBID of an event to which the entity is linked.',
+};
 const label = {
   type: MBID,
-  description: 'The MBID of a label to which the entity is linked.'
-}
+  description: 'The MBID of a label to which the entity is linked.',
+};
 const place = {
   type: MBID,
-  description: 'The MBID of a place to which the entity is linked.'
-}
+  description: 'The MBID of a place to which the entity is linked.',
+};
 const recording = {
   type: MBID,
-  description: 'The MBID of a recording to which the entity is linked.'
-}
+  description: 'The MBID of a recording to which the entity is linked.',
+};
 const release = {
   type: MBID,
-  description: 'The MBID of a release to which the entity is linked.'
-}
+  description: 'The MBID of a release to which the entity is linked.',
+};
 const releaseGroup = {
   type: MBID,
-  description: 'The MBID of a release group to which the entity is linked.'
-}
+  description: 'The MBID of a release group to which the entity is linked.',
+};
 const work = {
   type: MBID,
-  description: 'The MBID of a work to which the entity is linked.'
-}
+  description: 'The MBID of a work to which the entity is linked.',
+};
 
 function createBrowseField(connectionType, args) {
-  const typeName = toWords(connectionType.name.slice(0, -10))
+  const typeName = toWords(connectionType.name.slice(0, -10));
   return {
     type: connectionType,
     description: `Browse ${typeName} entities linked to the given arguments.`,
     args: {
       ...args,
-      ...forwardConnectionArgs
+      ...forwardConnectionArgs,
     },
-    resolve: resolveBrowse
-  }
+    resolve: resolveBrowse,
+  };
 }
 
 export const BrowseQuery = new GraphQLObjectType({
@@ -79,7 +83,7 @@ export const BrowseQuery = new GraphQLObjectType({
 entity.`,
   fields: {
     areas: createBrowseField(AreaConnection, {
-      collection
+      collection,
     }),
     artists: createBrowseField(ArtistConnection, {
       area,
@@ -87,14 +91,14 @@ entity.`,
       recording,
       release,
       releaseGroup,
-      work
+      work,
     }),
     collections: createBrowseField(CollectionConnection, {
       area,
       artist,
       editor: {
         type: GraphQLString,
-        description: 'The username of the editor who created the collection.'
+        description: 'The username of the editor who created the collection.',
       },
       event,
       label,
@@ -102,22 +106,22 @@ entity.`,
       recording,
       release,
       releaseGroup,
-      work
+      work,
     }),
     events: createBrowseField(EventConnection, {
       area,
       artist,
       collection,
-      place
+      place,
     }),
     labels: createBrowseField(LabelConnection, {
       area,
       collection,
-      release
+      release,
     }),
     places: createBrowseField(PlaceConnection, {
       area,
-      collection
+      collection,
     }),
     recordings: createBrowseField(RecordingConnection, {
       artist,
@@ -125,9 +129,9 @@ entity.`,
       isrc: {
         type: ISRC,
         description: `The [International Standard Recording Code](https://musicbrainz.org/doc/ISRC)
-(ISRC) of the recording.`
+(ISRC) of the recording.`,
       },
-      release
+      release,
     }),
     releases: createBrowseField(ReleaseConnection, {
       area,
@@ -136,28 +140,28 @@ entity.`,
       discID: {
         type: DiscID,
         description: `A [disc ID](https://musicbrainz.org/doc/Disc_ID)
-associated with the release.`
+associated with the release.`,
       },
       label,
       recording,
       releaseGroup,
       track: {
         type: MBID,
-        description: 'The MBID of a track that is included in the release.'
+        description: 'The MBID of a track that is included in the release.',
       },
       trackArtist: {
         type: MBID,
         description: `The MBID of an artist that appears on a track in the
-release, but is not included in the credits for the release itself.`
+release, but is not included in the credits for the release itself.`,
       },
       type: releaseGroupType,
-      status: releaseStatus
+      status: releaseStatus,
     }),
     releaseGroups: createBrowseField(ReleaseGroupConnection, {
       artist,
       collection,
       release,
-      type: releaseGroupType
+      type: releaseGroupType,
     }),
     works: createBrowseField(WorkConnection, {
       artist,
@@ -165,11 +169,11 @@ release, but is not included in the credits for the release itself.`
       iswc: {
         type: ISWC,
         description: `The [International Standard Musical Work Code](https://musicbrainz.org/doc/ISWC)
-(ISWC) of the work.`
-      }
-    })
-  }
-})
+(ISWC) of the work.`,
+      },
+    }),
+  },
+});
 
 export const browse = {
   type: BrowseQuery,
@@ -177,7 +181,7 @@ export const browse = {
     'Browse all MusicBrainz entities directly linked to another entity.',
   // We only have work to do once we know what entity types are being requested,
   // so this can just resolve to an empty object.
-  resolve: () => ({})
-}
+  resolve: () => ({}),
+};
 
-export default BrowseQuery
+export default BrowseQuery;

src/queries/index.js

@@ -1,3 +1,3 @@
-export { LookupQuery, lookup } from './lookup'
-export { BrowseQuery, browse } from './browse'
-export { SearchQuery, search } from './search'
+export { LookupQuery, lookup } from './lookup.js';
+export { BrowseQuery, browse } from './browse.js';
+export { SearchQuery, search } from './search.js';

src/queries/lookup.js

@@ -1,6 +1,6 @@
-import { GraphQLObjectType, GraphQLNonNull } from 'graphql'
-import { resolveLookup } from '../resolvers'
-import { mbid, toWords } from '../types/helpers'
+import GraphQL from 'graphql';
+import { resolveLookup } from '../resolvers.js';
+import { mbid } from '../types/helpers.js';
 import {
   Area,
   Artist,
@@ -18,17 +18,20 @@ import {
   Series,
   URL,
   URLString,
-  Work
-} from '../types'
+  Work,
+} from '../types/index.js';
+import { toWords } from '../util.js';
+
+const { GraphQLObjectType, GraphQLNonNull } = GraphQL;
 
 function createLookupField(entity, args) {
-  const typeName = toWords(entity.name)
+  const typeName = toWords(entity.name);
   return {
     type: entity,
     description: `Look up a specific ${typeName} by its MBID.`,
     args: { mbid, ...args },
-    resolve: resolveLookup
-  }
+    resolve: resolveLookup,
+  };
 }
 
 export const LookupQuery = new GraphQLObjectType({
@@ -45,12 +48,12 @@ export const LookupQuery = new GraphQLObjectType({
         discID: {
           type: new GraphQLNonNull(DiscID),
           description: `The [disc ID](https://musicbrainz.org/doc/Disc_ID)
-of the disc.`
-        }
+of the disc.`,
+        },
       },
       resolve: (root, { discID }, { loaders }, info) => {
-        return loaders.lookup.load(['discid', discID])
-      }
+        return loaders.lookup.load(['discid', discID]);
+      },
     },
     event: createLookupField(Event),
     instrument: createLookupField(Instrument),
@@ -65,23 +68,23 @@ of the disc.`
         ...mbid,
         // Remove the non-null requirement that is usually on the `mbid` field
         // so that URLs can be looked up by `resource`.
-        type: MBID
+        type: MBID,
       },
       resource: {
         type: URLString,
-        description: 'The web address of the URL entity to look up.'
-      }
+        description: 'The web address of the URL entity to look up.',
+      },
     }),
-    work: createLookupField(Work)
-  }
-})
+    work: createLookupField(Work),
+  },
+});
 
 export const lookup = {
   type: LookupQuery,
   description: 'Perform a lookup of a MusicBrainz entity by its MBID.',
   // We only have work to do once we know what entity types are being requested,
   // so this can just resolve to an empty object.
-  resolve: () => ({})
-}
+  resolve: () => ({}),
+};
 
-export default LookupQuery
+export default LookupQuery;

src/queries/search.js

@@ -1,6 +1,6 @@
-import { GraphQLObjectType, GraphQLNonNull, GraphQLString } from 'graphql'
-import { forwardConnectionArgs } from 'graphql-relay'
-import { resolveSearch } from '../resolvers'
+import GraphQL from 'graphql';
+import GraphQLRelay from 'graphql-relay';
+import { resolveSearch } from '../resolvers.js';
 import {
   AreaConnection,
   ArtistConnection,
@@ -12,12 +12,15 @@ import {
   ReleaseConnection,
   ReleaseGroupConnection,
   SeriesConnection,
-  WorkConnection
-} from '../types'
-import { toWords } from '../types/helpers'
+  WorkConnection,
+} from '../types/index.js';
+import { toWords } from '../util.js';
+
+const { GraphQLObjectType, GraphQLNonNull, GraphQLString } = GraphQL;
+const { forwardConnectionArgs } = GraphQLRelay;
 
 function createSearchField(connectionType) {
-  const typeName = toWords(connectionType.name.slice(0, -10))
+  const typeName = toWords(connectionType.name.slice(0, -10));
   return {
     type: connectionType,
     description: `Search for ${typeName} entities matching the given query.`,
@@ -25,12 +28,12 @@ function createSearchField(connectionType) {
       query: {
         type: new GraphQLNonNull(GraphQLString),
         description: `The query terms, in Lucene search syntax. See [examples
-and search fields](https://musicbrainz.org/doc/Development/XML_Web_Service/Version_2/Search).`
+and search fields](https://musicbrainz.org/doc/Development/XML_Web_Service/Version_2/Search).`,
       },
-      ...forwardConnectionArgs
+      ...forwardConnectionArgs,
     },
-    resolve: resolveSearch
-  }
+    resolve: resolveSearch,
+  };
 }
 
 export const SearchQuery = new GraphQLObjectType({
@@ -47,16 +50,16 @@ export const SearchQuery = new GraphQLObjectType({
     releases: createSearchField(ReleaseConnection),
     releaseGroups: createSearchField(ReleaseGroupConnection),
     series: createSearchField(SeriesConnection),
-    works: createSearchField(WorkConnection)
-  }
-})
+    works: createSearchField(WorkConnection),
+  },
+});
 
 export const search = {
   type: SearchQuery,
   description: 'Search for MusicBrainz entities using Lucene query syntax.',
   // We only have work to do once we know what entity types are being requested,
   // so this can just resolve to an empty object.
-  resolve: () => ({})
-}
+  resolve: () => ({}),
+};
 
-export default SearchQuery
+export default SearchQuery;

src/rate-limit.js

@@ -1,101 +1,103 @@
-const debug = require('debug')('graphbrainz:rate-limit')
+import createDebug from 'debug';
+
+const debug = createDebug('graphbrainz:rate-limit');
 
 export default class RateLimit {
   constructor({
     limit = 1,
     period = 1000,
     concurrency = limit || 1,
-    defaultPriority = 1
+    defaultPriority = 1,
   } = {}) {
-    this.limit = limit
-    this.period = period
-    this.defaultPriority = defaultPriority
-    this.concurrency = concurrency
-    this.queues = []
-    this.numPending = 0
-    this.periodStart = null
-    this.periodCapacity = this.limit
-    this.timer = null
-    this.pendingFlush = false
-    this.prevTaskID = null
+    this.limit = limit;
+    this.period = period;
+    this.defaultPriority = defaultPriority;
+    this.concurrency = concurrency;
+    this.queues = [];
+    this.numPending = 0;
+    this.periodStart = null;
+    this.periodCapacity = this.limit;
+    this.timer = null;
+    this.pendingFlush = false;
+    this.prevTaskID = null;
   }
 
   nextTaskID(prevTaskID = this.prevTaskID) {
-    const id = (prevTaskID || 0) + 1
-    this.prevTaskID = id
-    return id
+    const id = (prevTaskID || 0) + 1;
+    this.prevTaskID = id;
+    return id;
   }
 
   enqueue(fn, args, priority = this.defaultPriority) {
-    priority = Math.max(0, priority)
+    priority = Math.max(0, priority);
     return new Promise((resolve, reject) => {
-      const queue = (this.queues[priority] = this.queues[priority] || [])
-      const id = this.nextTaskID()
-      debug(`Enqueuing task. id=${id} priority=${priority}`)
-      queue.push({ fn, args, resolve, reject, id })
+      const queue = (this.queues[priority] = this.queues[priority] || []);
+      const id = this.nextTaskID();
+      debug(`Enqueuing task. id=${id} priority=${priority}`);
+      queue.push({ fn, args, resolve, reject, id });
       if (!this.pendingFlush) {
-        this.pendingFlush = true
+        this.pendingFlush = true;
         process.nextTick(() => {
-          this.pendingFlush = false
-          this.flush()
-        })
+          this.pendingFlush = false;
+          this.flush();
+        });
       }
-    })
+    });
   }
 
   dequeue() {
-    let task
+    let task;
     for (let i = this.queues.length - 1; i >= 0; i--) {
-      const queue = this.queues[i]
+      const queue = this.queues[i];
       if (queue && queue.length) {
-        task = queue.shift()
+        task = queue.shift();
       }
       if (!queue || !queue.length) {
-        this.queues.length = i
+        this.queues.length = i;
       }
       if (task) {
-        break
+        break;
       }
     }
-    return task
+    return task;
   }
 
   flush() {
     if (this.numPending < this.concurrency && this.periodCapacity > 0) {
-      const task = this.dequeue()
+      const task = this.dequeue();
       if (task) {
-        const { resolve, reject, fn, args, id } = task
+        const { resolve, reject, fn, args, id } = task;
         if (this.timer == null) {
-          const now = Date.now()
-          let timeout = this.period
+          const now = Date.now();
+          let timeout = this.period;
           if (this.periodStart != null) {
-            const delay = now - (this.periodStart + timeout)
+            const delay = now - (this.periodStart + timeout);
             if (delay > 0 && delay <= timeout) {
-              timeout -= delay
+              timeout -= delay;
             }
           }
-          this.periodStart = now
+          this.periodStart = now;
           this.timer = setTimeout(() => {
-            this.timer = null
-            this.periodCapacity = this.limit
-            this.flush()
-          }, timeout)
+            this.timer = null;
+            this.periodCapacity = this.limit;
+            this.flush();
+          }, timeout);
         }
-        this.numPending += 1
-        this.periodCapacity -= 1
-        const onResolve = value => {
-          this.numPending -= 1
-          resolve(value)
-          this.flush()
-        }
-        const onReject = err => {
-          this.numPending -= 1
-          reject(err)
-          this.flush()
-        }
-        debug(`Running task. id=${id}`)
-        fn(...args).then(onResolve, onReject)
-        this.flush()
+        this.numPending += 1;
+        this.periodCapacity -= 1;
+        const onResolve = (value) => {
+          this.numPending -= 1;
+          resolve(value);
+          this.flush();
+        };
+        const onReject = (err) => {
+          this.numPending -= 1;
+          reject(err);
+          this.flush();
+        };
+        debug(`Running task. id=${id}`);
+        fn(...args).then(onResolve, onReject);
+        this.flush();
       }
     }
   }

src/resolvers.js

@@ -1,39 +1,40 @@
-import { toDashed, toSingular } from './types/helpers'
-import {
+import GraphQLRelay from 'graphql-relay';
+import { getFields, extendIncludes, toDashed, toSingular } from './util.js';
+
+const {
   getOffsetWithDefault,
   connectionFromArray,
-  connectionFromArraySlice
-} from 'graphql-relay'
-import { getFields, extendIncludes } from './util'
+  connectionFromArraySlice,
+} = GraphQLRelay;
 
 export function includeRelationships(params, info, fragments = info.fragments) {
-  let fields = getFields(info, fragments)
+  let fields = getFields(info, fragments);
   if (info.fieldName !== 'relationships') {
     if (fields.relationships) {
-      fields = getFields(fields.relationships, fragments)
+      fields = getFields(fields.relationships, fragments);
     } else {
       if (fields.edges) {
-        fields = getFields(fields.edges, fragments)
+        fields = getFields(fields.edges, fragments);
         if (fields.node) {
-          return includeRelationships(params, fields.node, fragments)
+          return includeRelationships(params, fields.node, fragments);
         }
       }
-      return params
+      return params;
     }
   }
   if (fields) {
-    const relationships = Object.keys(fields)
-    const includeRels = relationships.map(field => {
-      return `${toDashed(toSingular(field))}-rels`
-    })
+    const relationships = Object.keys(fields);
+    const includeRels = relationships.map((field) => {
+      return `${toDashed(toSingular(field))}-rels`;
+    });
     if (includeRels.length) {
       params = {
         ...params,
-        inc: extendIncludes(params.inc, includeRels)
-      }
+        inc: extendIncludes(params.inc, includeRels),
+      };
     }
   }
-  return params
+  return params;
 }
 
 export function includeSubqueries(params, info, fragments = info.fragments) {
@@ -46,35 +47,37 @@ export function includeSubqueries(params, info, fragments = info.fragments) {
     'media.discs': ['discids'],
     'media.tracks': ['recordings'],
     rating: ['ratings'],
-    tags: ['tags']
-  }
-  let fields = getFields(info, fragments, 1)
-  const include = []
+    tags: ['tags'],
+  };
+  let fields = getFields(info, fragments, 1);
+  const include = [];
   for (const key in subqueryIncludes) {
-    const field = fields[key]
+    const field = fields[key];
     if (field) {
-      const value = subqueryIncludes[key]
-      include.push(...value)
+      const value = subqueryIncludes[key];
+      include.push(...value);
     }
   }
   params = {
     ...params,
-    inc: extendIncludes(params.inc, include)
-  }
+    inc: extendIncludes(params.inc, include),
+  };
   if (fields['edges.node']) {
-    params = includeSubqueries(params, fields['edges.node'], fragments)
+    params = includeSubqueries(params, fields['edges.node'], fragments);
   }
-  return params
+  return params;
 }
 
 export function resolveLookup(root, { mbid, ...params }, { loaders }, info) {
   if (!mbid && !params.resource) {
-    throw new Error('Lookups by a field other than MBID must provide: resource')
+    throw new Error(
+      'Lookups by a field other than MBID must provide: resource'
+    );
   }
-  const entityType = toDashed(info.fieldName)
-  params = includeSubqueries(params, info)
-  params = includeRelationships(params, info)
-  return loaders.lookup.load([entityType, mbid, params])
+  const entityType = toDashed(info.fieldName);
+  params = includeSubqueries(params, info);
+  params = includeRelationships(params, info);
+  return loaders.lookup.load([entityType, mbid, params]);
 }
 
 export function resolveBrowse(
@@ -83,62 +86,62 @@ export function resolveBrowse(
   { loaders },
   info
 ) {
-  const pluralName = toDashed(info.fieldName)
-  const singularName = toSingular(pluralName)
+  const pluralName = toDashed(info.fieldName);
+  const singularName = toSingular(pluralName);
   let params = {
     ...args,
     type,
     status,
     limit: first,
-    offset: getOffsetWithDefault(after, -1) + 1 || undefined
-  }
-  params = includeSubqueries(params, info)
-  params = includeRelationships(params, info, info.fragments)
-  const formatParam = value => value.toLowerCase().replace(/ /g, '')
-  params.type = params.type.map(formatParam)
-  params.status = params.status.map(formatParam)
-  let request
+    offset: getOffsetWithDefault(after, -1) + 1 || undefined,
+  };
+  params = includeSubqueries(params, info);
+  params = includeRelationships(params, info, info.fragments);
+  const formatParam = (value) => value.toLowerCase().replace(/ /g, '');
+  params.type = params.type.map(formatParam);
+  params.status = params.status.map(formatParam);
+  let request;
   if (discID) {
-    request = loaders.lookup.load(['discid', discID, params])
+    request = loaders.lookup.load(['discid', discID, params]);
     // If fetching releases by disc ID, they will already include the `media`
     // and `discids` subqueries, and it is invalid to specify them.
     if (params.inc) {
-      params.inc = params.inc.filter(value => {
-        return value !== 'media' && value !== 'discids'
-      })
+      params.inc = params.inc.filter((value) => {
+        return value !== 'media' && value !== 'discids';
+      });
     }
   } else if (isrc) {
-    request = loaders.lookup.load(['isrc', isrc, params]).then(result => {
-      result[pluralName].forEach(entity => {
-        entity._type = singularName
-      })
-      return result
-    })
+    request = loaders.lookup.load(['isrc', isrc, params]).then((result) => {
+      result[pluralName].forEach((entity) => {
+        entity._type = singularName;
+      });
+      return result;
+    });
   } else if (iswc) {
-    request = loaders.lookup.load(['iswc', iswc, params])
+    request = loaders.lookup.load(['iswc', iswc, params]);
   } else {
-    request = loaders.browse.load([singularName, params])
+    request = loaders.browse.load([singularName, params]);
   }
-  return request.then(list => {
+  return request.then((list) => {
     // Grab the list, offet, and count from the response and use them to build
     // a Relay connection object.
     const {
       [pluralName]: arraySlice,
       [`${singularName}-offset`]: sliceStart = 0,
-      [`${singularName}-count`]: arrayLength = arraySlice.length
-    } = list
-    const meta = { sliceStart, arrayLength }
+      [`${singularName}-count`]: arrayLength = arraySlice.length,
+    } = list;
+    const meta = { sliceStart, arrayLength };
     const connection = connectionFromArraySlice(
       arraySlice,
       { first, after },
       meta
-    )
+    );
     return {
-      nodes: connection.edges.map(edge => edge.node),
+      nodes: connection.edges.map((edge) => edge.node),
       totalCount: arrayLength,
-      ...connection
-    }
-  })
+      ...connection,
+    };
+  });
 }
 
 export function resolveSearch(
@@ -147,67 +150,67 @@ export function resolveSearch(
   { loaders },
   info
 ) {
-  const pluralName = toDashed(info.fieldName)
-  const singularName = toSingular(pluralName)
+  const pluralName = toDashed(info.fieldName);
+  const singularName = toSingular(pluralName);
   let params = {
     ...args,
     limit: first,
-    offset: getOffsetWithDefault(after, -1) + 1 || undefined
-  }
-  params = includeSubqueries(params, info)
-  return loaders.search.load([singularName, query, params]).then(list => {
+    offset: getOffsetWithDefault(after, -1) + 1 || undefined,
+  };
+  params = includeSubqueries(params, info);
+  return loaders.search.load([singularName, query, params]).then((list) => {
     const {
       [pluralName]: arraySlice,
       offset: sliceStart,
-      count: arrayLength
-    } = list
-    const meta = { sliceStart, arrayLength }
+      count: arrayLength,
+    } = list;
+    const meta = { sliceStart, arrayLength };
     const connection = connectionFromArraySlice(
       arraySlice,
       { first, after },
       meta
-    )
+    );
     // Move the `score` field up to the edge object and make sure it's a
     // number (MusicBrainz returns a string).
-    const edges = connection.edges.map(edge => ({
+    const edges = connection.edges.map((edge) => ({
       ...edge,
-      score: +edge.node.score
-    }))
+      score: +edge.node.score,
+    }));
     const connectionWithExtras = {
-      nodes: edges.map(edge => edge.node),
+      nodes: edges.map((edge) => edge.node),
       totalCount: arrayLength,
       ...connection,
-      edges
-    }
-    return connectionWithExtras
-  })
+      edges,
+    };
+    return connectionWithExtras;
+  });
 }
 
 export function resolveRelationship(rels, args, context, info) {
-  const targetType = toDashed(toSingular(info.fieldName)).replace('-', '_')
-  let matches = rels.filter(rel => rel['target-type'] === targetType)
+  const targetType = toDashed(toSingular(info.fieldName)).replace('-', '_');
+  let matches = rels.filter((rel) => rel['target-type'] === targetType);
   // There's no way to filter these at the API level, so do it here.
   if (args.direction != null) {
-    matches = matches.filter(rel => rel.direction === args.direction)
+    matches = matches.filter((rel) => rel.direction === args.direction);
   }
   if (args.type != null) {
-    matches = matches.filter(rel => rel.type === args.type)
+    matches = matches.filter((rel) => rel.type === args.type);
   }
   if (args.typeID != null) {
-    matches = matches.filter(rel => rel['type-id'] === args.typeID)
+    matches = matches.filter((rel) => rel['type-id'] === args.typeID);
   }
-  const connection = connectionFromArray(matches, args)
+  const connection = connectionFromArray(matches, args);
   return {
-    nodes: connection.edges.map(edge => edge.node),
+    nodes: connection.edges.map((edge) => edge.node),
     totalCount: matches.length,
-    ...connection
-  }
+    ...connection,
+  };
 }
 
 export function resolveLinked(entity, args, context, info) {
-  const parentEntity = toDashed(info.parentType.name)
-  args = { ...args, [parentEntity]: entity.id }
-  return resolveBrowse(entity, args, context, info)
+  const parentEntity = toDashed(info.parentType.name);
+  args = { ...args, [parentEntity]: entity.id };
+  return resolveBrowse(entity, args, context, info);
 }
 
 /**
@@ -217,32 +220,32 @@ export function resolveLinked(entity, args, context, info) {
  */
 export function createSubqueryResolver(
   { inc, key } = {},
-  handler = value => value
+  handler = (value) => value
 ) {
   return (entity, args, { loaders }, info) => {
-    key = key || toDashed(info.fieldName)
-    let promise
+    key = key || toDashed(info.fieldName);
+    let promise;
     if (key in entity) {
-      promise = Promise.resolve(entity)
+      promise = Promise.resolve(entity);
     } else {
-      const { _type: entityType, id } = entity
-      const params = { inc: [inc || key] }
-      promise = loaders.lookup.load([entityType, id, params])
+      const { _type: entityType, id } = entity;
+      const params = { inc: [inc || key] };
+      promise = loaders.lookup.load([entityType, id, params]);
     }
-    return promise.then(entity => handler(entity[key], args))
-  }
+    return promise.then((entity) => handler(entity[key], args));
+  };
 }
 
 export function resolveDiscReleases(disc, args, context, info) {
-  const { releases } = disc
+  const { releases } = disc;
   if (releases != null) {
-    const connection = connectionFromArray(releases, args)
+    const connection = connectionFromArray(releases, args);
     return {
-      nodes: connection.edges.map(edge => edge.node),
+      nodes: connection.edges.map((edge) => edge.node),
       totalCount: releases.length,
-      ...connection
-    }
+      ...connection,
+    };
   }
-  args = { ...args, discID: disc.id }
-  return resolveBrowse(disc, args, context, info)
+  args = { ...args, discID: disc.id };
+  return resolveBrowse(disc, args, context, info);
 }

src/schema.js

@@ -1,58 +1,62 @@
-import { GraphQLSchema, GraphQLObjectType, extendSchema, parse } from 'graphql'
-import { addResolveFunctionsToSchema } from 'graphql-tools'
-import { lookup, browse, search } from './queries'
-import { nodeField } from './types/node'
-import { loadExtension } from './extensions'
+import createDebug from 'debug';
+import GraphQL from 'graphql';
+import GraphQLToolsSchema from '@graphql-tools/schema';
+import { lookup, browse, search } from './queries/index.js';
+import { nodeField } from './types/node.js';
 
-const debug = require('debug')('graphbrainz:schema')
+const { GraphQLSchema, GraphQLObjectType, extendSchema, parse } = GraphQL;
+const { addResolversToSchema } = GraphQLToolsSchema;
+
+const debug = createDebug('graphbrainz:schema');
 
 export function applyExtension(extension, schema, options = {}) {
-  let outputSchema = schema
+  let outputSchema = schema;
   if (extension.extendSchema) {
     if (typeof extension.extendSchema === 'object') {
       debug(
         `Extending schema via an object from the “${extension.name}” extension.`
-      )
-      const { schemas = [], resolvers } = extension.extendSchema
+      );
+      const { schemas = [], resolvers } = extension.extendSchema;
       outputSchema = schemas.reduce((updatedSchema, extensionSchema) => {
         if (typeof extensionSchema === 'string') {
-          extensionSchema = parse(extensionSchema)
+          extensionSchema = parse(extensionSchema);
         }
-        return extendSchema(updatedSchema, extensionSchema)
-      }, outputSchema)
+        return extendSchema(updatedSchema, extensionSchema);
+      }, outputSchema);
       if (resolvers) {
-        addResolveFunctionsToSchema({ schema: outputSchema, resolvers })
+        outputSchema = addResolversToSchema({
+          schema: outputSchema,
+          resolvers,
+        });
       }
     } else if (typeof extension.extendSchema === 'function') {
       debug(
-        `Extending schema via a function from the “${
-          extension.name
-        }” extension.`
-      )
-      outputSchema = extension.extendSchema(schema, options)
+        `Extending schema via a function from the “${extension.name}” extension.`
+      );
+      outputSchema = extension.extendSchema(schema, options);
     } else {
       throw new Error(
         `The “${extension.name}” extension contains an invalid ` +
           `\`extendSchema\` value: ${extension.extendSchema}`
-      )
+      );
     }
   }
 
   // Fix for `graphql-tools` creating a new Query type with no description.
   if (outputSchema._queryType.description === undefined) {
-    outputSchema._queryType.description = schema._queryType.description
+    outputSchema._queryType.description = schema._queryType.description;
   }
-  return outputSchema
+  return outputSchema;
 }
 
 export function createSchema(schema, options = {}) {
-  const { extensions = [] } = options
+  const { extensions = [] } = options;
   return extensions.reduce((updatedSchema, extension) => {
-    return applyExtension(loadExtension(extension), updatedSchema, options)
-  }, schema)
+    return applyExtension(extension, updatedSchema, options);
+  }, schema);
 }
 
-export default new GraphQLSchema({
+export const baseSchema = new GraphQLSchema({
   query: new GraphQLObjectType({
     name: 'Query',
     description: `The query root, from which multiple types of MusicBrainz
@@ -61,7 +65,7 @@ requests can be made.`,
       lookup,
       browse,
       search,
-      node: nodeField
-    })
-  })
-})
+      node: nodeField,
+    }),
+  }),
+});

src/tag.js

@@ -5,11 +5,13 @@
  * whatsoever, but will parse the GraphQL document, allow syntax highlighting,
  * and enable Prettier formatting.
  */
-import { parse } from 'graphql'
+import GraphQL from 'graphql';
+
+const { parse } = GraphQL;
 
 export default function gql(literals, ...interpolations) {
   if (literals.length !== 1 || interpolations.length) {
-    throw new Error('The gql template tag does not support interpolation.')
+    throw new Error('The gql template tag does not support interpolation.');
   }
-  return parse(literals[0])
+  return parse(literals[0]);
 }

src/types/alias.js

@@ -1,8 +1,11 @@
-import { GraphQLObjectType, GraphQLBoolean } from 'graphql/type'
-import { Locale } from './scalars'
-import { name, sortName, fieldWithID } from './helpers'
+import GraphQL from 'graphql';
+import { Locale } from './scalars.js';
+import { name, sortName, fieldWithID } from './helpers.js';
+import { createSubqueryResolver } from '../resolvers.js';
 
-export default new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLBoolean, GraphQLList } = GraphQL;
+
+export const Alias = new GraphQLObjectType({
   name: 'Alias',
   description: `[Aliases](https://musicbrainz.org/doc/Aliases) are variant names
 that are mostly used as search help: if a search matches an entity’s alias, the
@@ -10,22 +13,29 @@ entity will be given as a result – even if the actual name wouldn’t be.`,
   fields: () => ({
     name: {
       ...name,
-      description: 'The aliased name of the entity.'
+      description: 'The aliased name of the entity.',
     },
     sortName,
     locale: {
       type: Locale,
       description: `The locale (language and/or country) in which the alias is
-used.`
+used.`,
     },
     primary: {
       type: GraphQLBoolean,
       description: `Whether this is the main alias for the entity in the
-specified locale (this could mean the most recent or the most common).`
+specified locale (this could mean the most recent or the most common).`,
     },
     ...fieldWithID('type', {
       description: `The type or purpose of the alias – whether it is a variant,
-search hint, etc.`
-    })
-  })
-})
+search hint, etc.`,
+    }),
+  }),
+});
+
+export const aliases = {
+  type: new GraphQLList(Alias),
+  description: `[Aliases](https://musicbrainz.org/doc/Aliases) are used to store
+alternate names or misspellings.`,
+  resolve: createSubqueryResolver(),
+};

src/types/area.js

@@ -1,26 +1,29 @@
-import { GraphQLObjectType, GraphQLString, GraphQLList } from 'graphql'
-import Node from './node'
-import Entity from './entity'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
 import {
   id,
   mbid,
   name,
   sortName,
   disambiguation,
-  aliases,
-  artists,
-  events,
-  labels,
-  places,
-  releases,
-  relationships,
-  collections,
-  tags,
   fieldWithID,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { events } from './event.js';
+import { aliases } from './alias.js';
+import { artists } from './artist.js';
+import { labels } from './label.js';
+import { places } from './place.js';
+import { releases } from './release.js';
+import { relationships } from './relationship.js';
+import { collections } from './collection.js';
+import { tags } from './tag.js';
 
-const Area = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLString, GraphQLList } = GraphQL;
+
+export const Area = new GraphQLObjectType({
   name: 'Area',
   description: `[Areas](https://musicbrainz.org/doc/Area) are geographic regions
 or settlements (countries, cities, or the like).`,
@@ -41,17 +44,17 @@ the codes assigned by ISO to countries and subdivisions.`,
           type: GraphQLString,
           description: `Specify the particular ISO standard codes to retrieve.
 Available ISO standards are 3166-1, 3166-2, and 3166-3.`,
-          defaultValue: '3166-1'
-        }
+          defaultValue: '3166-1',
+        },
       },
       resolve: (data, args) => {
-        const { standard = '3166-1' } = args
-        return data[`iso-${standard}-codes`]
-      }
+        const { standard = '3166-1' } = args;
+        return data[`iso-${standard}-codes`];
+      },
     },
     ...fieldWithID('type', {
       description: `The type of area (country, city, etc. – see the [possible
-values](https://musicbrainz.org/doc/Area)).`
+values](https://musicbrainz.org/doc/Area)).`,
     }),
     artists,
     events,
@@ -60,9 +63,10 @@ values](https://musicbrainz.org/doc/Area)).`
     releases,
     relationships,
     collections,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const AreaConnection = connectionWithExtras(Area)
-export default Area
+export const AreaConnection = connectionWithExtras(Area);
+
+export const areas = linkedQuery(AreaConnection);

src/types/artist-credit.js

@@ -1,7 +1,10 @@
-import { GraphQLObjectType, GraphQLString } from 'graphql/type'
-import Artist from './artist'
+import GraphQL from 'graphql';
+import { Artist } from './artist.js';
+import { createSubqueryResolver } from '../resolvers.js';
 
-export default new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLString, GraphQLList } = GraphQL;
+
+export const ArtistCredit = new GraphQLObjectType({
   name: 'ArtistCredit',
   description: `[Artist credits](https://musicbrainz.org/doc/Artist_Credits)
 indicate who is the main credited artist (or artists) for releases, release
@@ -13,24 +16,42 @@ track, etc., and join phrases between them.`,
       type: Artist,
       description: `The entity representing the artist referenced in the
 credits.`,
-      resolve: source => {
-        const { artist } = source
+      resolve: (source) => {
+        const { artist } = source;
         if (artist) {
-          artist._type = 'artist'
+          artist._type = 'artist';
         }
-        return artist
-      }
+        return artist;
+      },
     },
     name: {
       type: GraphQLString,
       description: `The name of the artist as credited in the specific release,
-track, etc.`
+track, etc.`,
     },
     joinPhrase: {
       type: GraphQLString,
       description: `Join phrases might include words and/or punctuation to
 separate artist names as they appear on the release, track, etc.`,
-      resolve: data => data.joinphrase
-    }
-  })
-})
+      resolve: (data) => data.joinphrase,
+    },
+  }),
+});
+
+export const artistCredits = {
+  type: new GraphQLList(ArtistCredit),
+  description: 'The main credited artist(s).',
+  resolve: createSubqueryResolver({
+    inc: 'artist-credits',
+    key: 'artist-credit',
+  }),
+};
+
+export const artistCredit = {
+  ...artistCredits,
+  deprecationReason: `The \`artistCredit\` field has been renamed to
+\`artistCredits\`, since it is a list of credits and is referred to in the
+plural form throughout the MusicBrainz documentation. This field is deprecated
+and will be removed in a major release in the future. Use the equivalent
+\`artistCredits\` field.`,
+};

src/types/artist.js

@@ -1,8 +1,18 @@
-import { GraphQLObjectType, GraphQLString, GraphQLList } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
-import Area from './area'
-import { IPI, ISNI } from './scalars'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
+import { Area } from './area.js';
+import { aliases } from './alias.js';
+import { collections } from './collection.js';
+import { lifeSpan } from './life-span.js';
+import { recordings } from './recording.js';
+import { releases } from './release.js';
+import { releaseGroups } from './release-group.js';
+import { works } from './work.js';
+import { relationships } from './relationship.js';
+import { rating } from './rating.js';
+import { tags } from './tag.js';
+import { IPI, ISNI } from './scalars.js';
 import {
   resolveWithFallback,
   fieldWithID,
@@ -11,20 +21,13 @@ import {
   name,
   sortName,
   disambiguation,
-  aliases,
-  lifeSpan,
-  recordings,
-  releases,
-  releaseGroups,
-  works,
-  relationships,
-  collections,
-  rating,
-  tags,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
 
-const Artist = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLString, GraphQLList } = GraphQL;
+
+export const Artist = new GraphQLObjectType({
   name: 'Artist',
   description: `An [artist](https://musicbrainz.org/doc/Artist) is generally a
 musician, group of musicians, or other music professional (like a producer or
@@ -42,42 +45,42 @@ even a fictional character.`,
     country: {
       type: GraphQLString,
       description: `The country with which an artist is primarily identified. It
-is often, but not always, its birth/formation country.`
+is often, but not always, its birth/formation country.`,
     },
     area: {
       type: Area,
       description: `The area with which an artist is primarily identified. It
-is often, but not always, its birth/formation country.`
+is often, but not always, its birth/formation country.`,
     },
     beginArea: {
       type: Area,
       description: `The area in which an artist began their career (or where
 they were born, if the artist is a person).`,
-      resolve: resolveWithFallback(['begin-area', 'begin_area'])
+      resolve: resolveWithFallback(['begin-area', 'begin_area']),
     },
     endArea: {
       type: Area,
       description: `The area in which an artist ended their career (or where
 they died, if the artist is a person).`,
-      resolve: resolveWithFallback(['end-area', 'end_area'])
+      resolve: resolveWithFallback(['end-area', 'end_area']),
     },
     lifeSpan,
     ...fieldWithID('gender', {
       description: `Whether a person or character identifies as male, female, or
-neither. Groups do not have genders.`
+neither. Groups do not have genders.`,
     }),
     ...fieldWithID('type', {
-      description: 'Whether an artist is a person, a group, or something else.'
+      description: 'Whether an artist is a person, a group, or something else.',
     }),
     ipis: {
       type: new GraphQLList(IPI),
       description: `List of [Interested Parties Information](https://musicbrainz.org/doc/IPI)
-(IPI) codes for the artist.`
+(IPI) codes for the artist.`,
     },
     isnis: {
       type: new GraphQLList(ISNI),
       description: `List of [International Standard Name Identifier](https://musicbrainz.org/doc/ISNI)
-(ISNI) codes for the artist.`
+(ISNI) codes for the artist.`,
     },
     recordings,
     releases,
@@ -86,9 +89,10 @@ neither. Groups do not have genders.`
     relationships,
     collections,
     rating,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const ArtistConnection = connectionWithExtras(Artist)
-export default Artist
+export const ArtistConnection = connectionWithExtras(Artist);
+
+export const artists = linkedQuery(ArtistConnection);

src/types/collection.js

@@ -1,28 +1,31 @@
-import { GraphQLObjectType, GraphQLNonNull, GraphQLString } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
 import {
   id,
   mbid,
   name,
-  areas,
-  artists,
-  events,
-  instruments,
-  labels,
-  places,
-  recordings,
-  releases,
-  releaseGroups,
-  series,
-  works,
   fieldWithID,
   resolveHyphenated,
   createCollectionField,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { areas } from './area.js';
+import { artists } from './artist.js';
+import { events } from './event.js';
+import { instruments } from './instrument.js';
+import { labels } from './label.js';
+import { places } from './place.js';
+import { recordings } from './recording.js';
+import { releases } from './release.js';
+import { releaseGroups } from './release-group.js';
+import { series } from './series.js';
+import { works } from './work.js';
 
-const Collection = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLNonNull, GraphQLString } = GraphQL;
+
+export const Collection = new GraphQLObjectType({
   name: 'Collection',
   description: `[Collections](https://musicbrainz.org/doc/Collections) are
 lists of entities that users can create.`,
@@ -33,15 +36,15 @@ lists of entities that users can create.`,
     name,
     editor: {
       type: new GraphQLNonNull(GraphQLString),
-      description: 'The username of the editor who created the collection.'
+      description: 'The username of the editor who created the collection.',
     },
     entityType: {
       type: new GraphQLNonNull(GraphQLString),
       description: 'The type of entity listed in the collection.',
-      resolve: resolveHyphenated
+      resolve: resolveHyphenated,
     },
     ...fieldWithID('type', {
-      description: 'The type of collection.'
+      description: 'The type of collection.',
     }),
     areas: createCollectionField(areas),
     artists: createCollectionField(artists),
@@ -53,9 +56,12 @@ lists of entities that users can create.`,
     releases: createCollectionField(releases),
     releaseGroups: createCollectionField(releaseGroups),
     series: createCollectionField(series),
-    works: createCollectionField(works)
-  })
-})
+    works: createCollectionField(works),
+  }),
+});
 
-export const CollectionConnection = connectionWithExtras(Collection)
-export default Collection
+export const CollectionConnection = connectionWithExtras(Collection);
+
+export const collections = linkedQuery(CollectionConnection, {
+  description: 'A list of collections containing this entity.',
+});

src/types/disc.js

@@ -1,17 +1,15 @@
-import {
-  GraphQLObjectType,
-  GraphQLNonNull,
-  GraphQLList,
-  GraphQLInt
-} from 'graphql/type'
-import { forwardConnectionArgs } from 'graphql-relay'
-import Node from './node'
-import { DiscID } from './scalars'
-import { ReleaseConnection } from './release'
-import { resolveDiscReleases } from '../resolvers'
-import { id, resolveHyphenated } from './helpers'
+import GraphQL from 'graphql';
+import GraphQLRelay from 'graphql-relay';
+import { Node } from './node.js';
+import { DiscID } from './scalars.js';
+import { ReleaseConnection } from './release.js';
+import { resolveDiscReleases } from '../resolvers.js';
+import { id, resolveHyphenated } from './helpers.js';
 
-export default new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLNonNull, GraphQLList, GraphQLInt } = GraphQL;
+const { forwardConnectionArgs } = GraphQLRelay;
+
+export const Disc = new GraphQLObjectType({
   name: 'Disc',
   description: `Information about the physical CD and releases associated with a
 particular [disc ID](https://musicbrainz.org/doc/Disc_ID).`,
@@ -21,26 +19,26 @@ particular [disc ID](https://musicbrainz.org/doc/Disc_ID).`,
     discID: {
       type: new GraphQLNonNull(DiscID),
       description: `The [disc ID](https://musicbrainz.org/doc/Disc_ID) of this disc.`,
-      resolve: disc => disc.id
+      resolve: (disc) => disc.id,
     },
     offsetCount: {
       type: new GraphQLNonNull(GraphQLInt),
       description: 'The number of offsets (tracks) on the disc.',
-      resolve: resolveHyphenated
+      resolve: resolveHyphenated,
     },
     offsets: {
       type: new GraphQLList(GraphQLInt),
-      description: 'The sector offset of each track on the disc.'
+      description: 'The sector offset of each track on the disc.',
     },
     sectors: {
       type: new GraphQLNonNull(GraphQLInt),
-      description: 'The sector offset of the lead-out (the end of the disc).'
+      description: 'The sector offset of the lead-out (the end of the disc).',
     },
     releases: {
       type: ReleaseConnection,
       description: 'The list of releases linked to this disc ID.',
       args: forwardConnectionArgs,
-      resolve: resolveDiscReleases
-    }
-  })
-})
+      resolve: resolveDiscReleases,
+    },
+  }),
+});

src/types/entity.js

@@ -1,29 +1,13 @@
-import { GraphQLInterfaceType } from 'graphql'
-import { mbid, connectionWithExtras } from './helpers'
+import GraphQL from 'graphql';
+import { mbid, connectionWithExtras, resolveType } from './helpers.js';
 
-const debug = require('debug')('graphbrainz:types/entity')
+const { GraphQLInterfaceType } = GraphQL;
 
-const Entity = new GraphQLInterfaceType({
+export const Entity = new GraphQLInterfaceType({
   name: 'Entity',
   description: 'An entity in the MusicBrainz schema.',
-  resolveType(value, context, info) {
-    if (value._type) {
-      let originalType
-      try {
-        originalType = require(`./${value._type}`).default
-      } catch (err) {
-        debug(`Failed to load type: ${value._type}`)
-        return
-      }
-      // Don't use `originalType`! The schema may have been extended in which
-      // case the types have all been replaced. Instead, find the current type
-      // of the same name.
-      const typeMap = info.schema.getTypeMap()
-      return typeMap[originalType.name]
-    }
-  },
-  fields: () => ({ mbid })
-})
+  resolveType,
+  fields: () => ({ mbid }),
+});
 
-export const EntityConnection = connectionWithExtras(Entity)
-export default Entity
+export const EntityConnection = connectionWithExtras(Entity);

src/types/enums.js

@@ -1,4 +1,6 @@
-import { GraphQLEnumType } from 'graphql/type'
+import GraphQL from 'graphql';
+
+const { GraphQLEnumType } = GraphQL;
 
 export const ArtistType = new GraphQLEnumType({
   name: 'ArtistType',
@@ -8,37 +10,37 @@ etc.`,
     PERSON: {
       name: 'Person',
       description: 'This indicates an individual person.',
-      value: 'Person'
+      value: 'Person',
     },
     GROUP: {
       name: 'Group',
       description: `This indicates a group of people that may or may not have a
 distinctive name.`,
-      value: 'Group'
+      value: 'Group',
     },
     ORCHESTRA: {
       name: 'Orchestra',
       description:
         'This indicates an orchestra (a large instrumental ensemble).',
-      value: 'Orchestra'
+      value: 'Orchestra',
     },
     CHOIR: {
       name: 'Choir',
       description: 'This indicates a choir/chorus (a large vocal ensemble).',
-      value: 'Choir'
+      value: 'Choir',
     },
     CHARACTER: {
       name: 'Character',
       description: 'This indicates an individual fictional character.',
-      value: 'Character'
+      value: 'Character',
     },
     OTHER: {
       name: 'Other',
       description: 'An artist which does not fit into the other categories.',
-      value: 'Other'
-    }
-  }
-})
+      value: 'Other',
+    },
+  },
+});
 
 export const CoverArtImageSize = new GraphQLEnumType({
   name: 'CoverArtImageSize',
@@ -48,20 +50,20 @@ Archive](https://musicbrainz.org/doc/Cover_Art_Archive).`,
     SMALL: {
       name: 'Small',
       description: 'A maximum dimension of 250px.',
-      value: 250
+      value: 250,
     },
     LARGE: {
       name: 'Large',
       description: 'A maximum dimension of 500px.',
-      value: 500
+      value: 500,
     },
     FULL: {
       name: 'Full',
       description: 'The image’s original dimensions, with no maximum.',
-      value: null
-    }
-  }
-})
+      value: null,
+    },
+  },
+});
 
 export const ReleaseStatus = new GraphQLEnumType({
   name: 'ReleaseStatus',
@@ -72,29 +74,29 @@ bootleg, etc.`,
       name: 'Official',
       description: `Any release officially sanctioned by the artist and/or their
 record company. (Most releases will fit into this category.)`,
-      value: 'Official'
+      value: 'Official',
     },
     PROMOTION: {
       name: 'Promotion',
       description: `A giveaway release or a release intended to promote an
 upcoming official release, e.g. prerelease albums or releases included with a
 magazine.`,
-      value: 'Promotion'
+      value: 'Promotion',
     },
     BOOTLEG: {
       name: 'Bootleg',
       description: `An unofficial/underground release that was not sanctioned by
 the artist and/or the record company.`,
-      value: 'Bootleg'
+      value: 'Bootleg',
     },
     PSEUDORELEASE: {
       name: 'Pseudo-Release',
       description: `A pseudo-release is a duplicate release for
 translation/transliteration purposes.`,
-      value: 'Pseudo-Release'
-    }
-  }
-})
+      value: 'Pseudo-Release',
+    },
+  },
+});
 
 export const ReleaseGroupType = new GraphQLEnumType({
   name: 'ReleaseGroupType',
@@ -107,14 +109,14 @@ etc.`,
 release, generally consists of previously unreleased material (unless this type
 is combined with secondary types which change that, such as “Compilation”). This
 includes album re-issues, with or without bonus tracks.`,
-      value: 'Album'
+      value: 'Album',
     },
     SINGLE: {
       name: 'Single',
       description: `A single typically has one main song and possibly a handful
 of additional tracks or remixes of the main track. A single is usually named
 after its main song.`,
-      value: 'Single'
+      value: 'Single',
     },
     EP: {
       name: 'EP',
@@ -124,57 +126,57 @@ full length release (an LP or “Long Play”) and the tracks are usually exclus
 to the EP, in other words the tracks don’t come from a previously issued
 release. EP is fairly difficult to define; usually it should only be assumed
 that a release is an EP if the artist defines it as such.`,
-      value: 'EP'
+      value: 'EP',
     },
     OTHER: {
       name: 'Other',
       description: 'Any release that does not fit any of the other categories.',
-      value: 'Other'
+      value: 'Other',
     },
     BROADCAST: {
       name: 'Broadcast',
       description: `An episodic release that was originally broadcast via radio,
 television, or the Internet, including podcasts.`,
-      value: 'Broadcast'
+      value: 'Broadcast',
     },
     COMPILATION: {
       name: 'Compilation',
       description: `A compilation is a collection of previously released tracks
 by one or more artists.`,
-      value: 'Compilation'
+      value: 'Compilation',
     },
     SOUNDTRACK: {
       name: 'Soundtrack',
       description: `A soundtrack is the musical score to a movie, TV series,
 stage show, computer game, etc.`,
-      value: 'Soundtrack'
+      value: 'Soundtrack',
     },
     SPOKENWORD: {
       name: 'Spoken Word',
       description: 'A non-music spoken word release.',
-      value: 'Spoken Word'
+      value: 'Spoken Word',
     },
     INTERVIEW: {
       name: 'Interview',
       description: `An interview release contains an interview, generally with
 an artist.`,
-      value: 'Interview'
+      value: 'Interview',
     },
     AUDIOBOOK: {
       name: 'Audiobook',
       description: 'An audiobook is a book read by a narrator without music.',
-      value: 'Audiobook'
+      value: 'Audiobook',
     },
     LIVE: {
       name: 'Live',
       description: 'A release that was recorded live.',
-      value: 'Live'
+      value: 'Live',
     },
     REMIX: {
       name: 'Remix',
       description: `A release that was (re)mixed from previously released
 material.`,
-      value: 'Remix'
+      value: 'Remix',
     },
     DJMIX: {
       name: 'DJ-mix',
@@ -183,7 +185,7 @@ after the other, each one modified so that they blend together into a continuous
 flow of music. A DJ mix release requires that the recordings be modified in some
 manner, and the DJ who does this modification is usually (although not always)
 credited in a fairly prominent way.`,
-      value: 'DJ-mix'
+      value: 'DJ-mix',
     },
     MIXTAPE: {
       name: 'Mixtape/Street',
@@ -199,18 +201,18 @@ significant proportion of new material, including original production or
 original vocals over top of other artists’ instrumentals. They are distinct from
 demos in that they are designed for release directly to the public and fans, not
 to labels.`,
-      value: 'Mixtape/Street'
+      value: 'Mixtape/Street',
     },
     DEMO: {
       name: 'Demo',
       description: `A release that was recorded for limited circulation or
 reference use rather than for general public release.`,
-      value: 'Demo'
+      value: 'Demo',
     },
     NAT: {
       name: 'Non-Album Track',
       description: 'A non-album track (special case).',
-      value: 'NAT'
-    }
-  }
-})
+      value: 'NAT',
+    },
+  },
+});

src/types/event.js

@@ -1,23 +1,26 @@
-import { GraphQLObjectType, GraphQLString, GraphQLBoolean } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
-import { Time } from './scalars'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
+import { Time } from './scalars.js';
 import {
   fieldWithID,
   id,
   mbid,
   name,
   disambiguation,
-  aliases,
-  lifeSpan,
-  relationships,
-  collections,
-  rating,
-  tags,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { aliases } from './alias.js';
+import { collections } from './collection.js';
+import { lifeSpan } from './life-span.js';
+import { rating } from './rating.js';
+import { relationships } from './relationship.js';
+import { tags } from './tag.js';
 
-const Event = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLString, GraphQLBoolean } = GraphQL;
+
+export const Event = new GraphQLObjectType({
   name: 'Event',
   description: `An [event](https://musicbrainz.org/doc/Event) refers to an
 organised event which people can attend, and is relevant to MusicBrainz.
@@ -32,28 +35,29 @@ Generally this means live performances, like concerts and festivals.`,
     lifeSpan,
     time: {
       type: Time,
-      description: 'The start time of the event.'
+      description: 'The start time of the event.',
     },
     cancelled: {
       type: GraphQLBoolean,
-      description: 'Whether or not the event took place.'
+      description: 'Whether or not the event took place.',
     },
     setlist: {
       type: GraphQLString,
       description: `A list of songs performed, optionally including links to
 artists and works. See the [setlist documentation](https://musicbrainz.org/doc/Event/Setlist)
-for syntax and examples.`
+for syntax and examples.`,
     },
     ...fieldWithID('type', {
       description:
-        'What kind of event the event is, e.g. concert, festival, etc.'
+        'What kind of event the event is, e.g. concert, festival, etc.',
     }),
     relationships,
     collections,
     rating,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const EventConnection = connectionWithExtras(Event)
-export default Event
+export const EventConnection = connectionWithExtras(Event);
+
+export const events = linkedQuery(EventConnection);

src/types/helpers.js

@@ -1,301 +1,134 @@
-import dashify from 'dashify'
-import pascalCase from 'pascalcase'
-import {
-  GraphQLObjectType,
-  GraphQLString,
-  GraphQLInt,
-  GraphQLList,
-  GraphQLNonNull
-} from 'graphql'
-import {
+import GraphQL from 'graphql';
+import GraphQLRelay from 'graphql-relay';
+import { MBID } from './scalars.js';
+import { ReleaseGroupType, ReleaseStatus } from './enums.js';
+import { resolveLinked } from '../resolvers.js';
+import { toDashed, toPascal, toSingular, toPlural, toWords } from '../util.js';
+
+const { GraphQLString, GraphQLInt, GraphQLList, GraphQLNonNull } = GraphQL;
+const {
   globalIdField,
-  connectionArgs,
   connectionDefinitions,
-  connectionFromArray,
-  forwardConnectionArgs
-} from 'graphql-relay'
-import { MBID } from './scalars'
-import { ReleaseGroupType, ReleaseStatus } from './enums'
-import Alias from './alias'
-import ArtistCredit from './artist-credit'
-import { AreaConnection } from './area'
-import { ArtistConnection } from './artist'
-import { CollectionConnection } from './collection'
-import { EventConnection } from './event'
-import { InstrumentConnection } from './instrument'
-import { LabelConnection } from './label'
-import LifeSpan from './life-span'
-import { PlaceConnection } from './place'
-import Rating from './rating'
-import { RecordingConnection } from './recording'
-import { RelationshipConnection } from './relationship'
-import { ReleaseConnection } from './release'
-import { ReleaseGroupConnection } from './release-group'
-import { SeriesConnection } from './series'
-import { TagConnection } from './tag'
-import { WorkConnection } from './work'
-import {
-  resolveLinked,
-  resolveRelationship,
-  createSubqueryResolver,
-  includeRelationships
-} from '../resolvers'
+  forwardConnectionArgs,
+} = GraphQLRelay;
 
-export const toPascal = pascalCase
-export const toDashed = dashify
+const TYPE_NAMES = {
+  discid: 'Disc',
+  url: 'URL',
+};
 
-export function toPlural(name) {
-  return name.endsWith('s') ? name : name + 's'
-}
-
-export function toSingular(name) {
-  return name.endsWith('s') && !/series/i.test(name) ? name.slice(0, -1) : name
-}
-
-export function toWords(name) {
-  return toPascal(name).replace(/([^A-Z])?([A-Z]+)/g, (match, tail, head) => {
-    tail = tail ? tail + ' ' : ''
-    head = head.length > 1 ? head : head.toLowerCase()
-    return `${tail}${head}`
-  })
+export function resolveType(value, context, info) {
+  const typeName = TYPE_NAMES[value._type] || toPascal(value._type);
+  const typeMap = info.schema.getTypeMap();
+  return typeMap[typeName];
 }
 
 export function resolveHyphenated(obj, args, context, info) {
-  const name = toDashed(info.fieldName)
-  return obj[name]
+  const name = toDashed(info.fieldName);
+  return obj[name];
 }
 
 export function resolveWithFallback(keys) {
-  return obj => {
+  return (obj) => {
     for (let i = 0; i < keys.length; i++) {
-      const key = keys[i]
+      const key = keys[i];
       if (key in obj) {
-        return obj[key]
+        return obj[key];
       }
     }
-  }
+  };
 }
 
 export function fieldWithID(name, config = {}) {
   config = {
     type: GraphQLString,
     resolve: resolveHyphenated,
-    ...config
-  }
-  const isPlural = config.type instanceof GraphQLList
-  const singularName = isPlural ? toSingular(name) : name
-  const idName = isPlural ? `${singularName}IDs` : `${name}ID`
-  const s = isPlural ? 's' : ''
+    ...config,
+  };
+  const isPlural = config.type instanceof GraphQLList;
+  const singularName = isPlural ? toSingular(name) : name;
+  const idName = isPlural ? `${singularName}IDs` : `${name}ID`;
+  const s = isPlural ? 's' : '';
   const idConfig = {
     type: isPlural ? new GraphQLList(MBID) : MBID,
     description: `The MBID${s} associated with the value${s} of the \`${name}\`
 field.`,
     resolve: (entity, args, { loaders }) => {
-      const fieldName = toDashed(idName)
+      const fieldName = toDashed(idName);
       if (fieldName in entity) {
-        return entity[fieldName]
+        return entity[fieldName];
       }
       return loaders.lookup
         .load([entity._type, entity.id])
-        .then(data => data[fieldName])
-    }
-  }
+        .then((data) => data[fieldName]);
+    },
+  };
   return {
     [name]: config,
-    [idName]: idConfig
-  }
+    [idName]: idConfig,
+  };
 }
 
 export function createCollectionField(config) {
-  const typeName = toPlural(toWords(config.type.name.slice(0, -10)))
+  const typeName = toPlural(toWords(config.type.name.slice(0, -10)));
   return {
     ...config,
-    description: `The list of ${typeName} found in this collection.`
-  }
+    description: `The list of ${typeName} found in this collection.`,
+  };
 }
 
-export const id = globalIdField()
+export const id = globalIdField();
 export const mbid = {
   type: new GraphQLNonNull(MBID),
   description: 'The MBID of the entity.',
-  resolve: entity => entity.id
-}
+  resolve: (entity) => entity.id,
+};
 export const name = {
   type: GraphQLString,
-  description: 'The official name of the entity.'
-}
+  description: 'The official name of the entity.',
+};
 export const sortName = {
   type: GraphQLString,
   description: `The string to use for the purpose of ordering by name (for
 example, by moving articles like ‘the’ to the end or a person’s last name to
 the front).`,
-  resolve: resolveHyphenated
-}
+  resolve: resolveHyphenated,
+};
 export const title = {
   type: GraphQLString,
-  description: 'The official title of the entity.'
-}
+  description: 'The official title of the entity.',
+};
 export const disambiguation = {
   type: GraphQLString,
-  description: 'A comment used to help distinguish identically named entitites.'
-}
-export const lifeSpan = {
-  type: LifeSpan,
-  description: `The begin and end dates of the entity’s existence. Its exact
-meaning depends on the type of entity.`,
-  resolve: resolveHyphenated
-}
+  description:
+    'A comment used to help distinguish identically named entitites.',
+};
 
-function linkedQuery(connectionType, { args, ...config } = {}) {
-  const typeName = toPlural(toWords(connectionType.name.slice(0, -10)))
+export function linkedQuery(connectionType, { args, ...config } = {}) {
+  const typeName = toPlural(toWords(connectionType.name.slice(0, -10)));
   return {
     type: connectionType,
     description: `A list of ${typeName} linked to this entity.`,
     args: {
       ...args,
-      ...forwardConnectionArgs
+      ...forwardConnectionArgs,
     },
     resolve: resolveLinked,
-    ...config
-  }
+    ...config,
+  };
 }
 
-export const relationship = {
-  type: RelationshipConnection,
-  description: 'A list of relationships between these two entity types.',
-  args: {
-    direction: {
-      type: GraphQLString,
-      description: 'Filter by the relationship direction.'
-    },
-    ...fieldWithID('type', {
-      description: 'Filter by the relationship type.'
-    }),
-    ...connectionArgs
-  },
-  resolve: resolveRelationship
-}
-
-export const relationships = {
-  type: new GraphQLObjectType({
-    name: 'Relationships',
-    description: 'Lists of entity relationships for each entity type.',
-    fields: () => ({
-      areas: relationship,
-      artists: relationship,
-      events: relationship,
-      instruments: relationship,
-      labels: relationship,
-      places: relationship,
-      recordings: relationship,
-      releases: relationship,
-      releaseGroups: relationship,
-      series: relationship,
-      urls: relationship,
-      works: relationship
-    })
-  }),
-  description: 'Relationships between this entity and other entitites.',
-  resolve: (entity, args, { loaders }, info) => {
-    let promise
-    if (entity.relations != null) {
-      promise = Promise.resolve(entity)
-    } else {
-      const entityType = toDashed(info.parentType.name)
-      const id = entity.id
-      const params = includeRelationships({}, info)
-      promise = loaders.lookup.load([entityType, id, params])
-    }
-    return promise.then(entity => entity.relations)
-  }
-}
-
-export const aliases = {
-  type: new GraphQLList(Alias),
-  description: `[Aliases](https://musicbrainz.org/doc/Aliases) are used to store
-alternate names or misspellings.`,
-  resolve: createSubqueryResolver()
-}
-
-export const artistCredits = {
-  type: new GraphQLList(ArtistCredit),
-  description: 'The main credited artist(s).',
-  resolve: createSubqueryResolver({
-    inc: 'artist-credits',
-    key: 'artist-credit'
-  })
-}
-
-export const artistCredit = {
-  ...artistCredits,
-  deprecationReason: `The \`artistCredit\` field has been renamed to
-\`artistCredits\`, since it is a list of credits and is referred to in the
-plural form throughout the MusicBrainz documentation. This field is deprecated
-and will be removed in a major release in the future. Use the equivalent
-\`artistCredits\` field.`
-}
-
-export const rating = {
-  type: Rating,
-  description: 'The rating users have given to this entity.',
-  resolve: createSubqueryResolver({ inc: 'ratings' })
-}
-
-export const releaseGroupType = {
-  type: new GraphQLList(ReleaseGroupType),
-  description: 'Filter by one or more release group types.'
-}
-
-export const releaseStatus = {
-  type: new GraphQLList(ReleaseStatus),
-  description: 'Filter by one or more release statuses.'
-}
-
-export const areas = linkedQuery(AreaConnection)
-export const artists = linkedQuery(ArtistConnection)
-export const collections = linkedQuery(CollectionConnection, {
-  description: 'A list of collections containing this entity.'
-})
-export const events = linkedQuery(EventConnection)
-export const instruments = linkedQuery(InstrumentConnection)
-export const labels = linkedQuery(LabelConnection)
-export const places = linkedQuery(PlaceConnection)
-export const recordings = linkedQuery(RecordingConnection)
-export const releases = linkedQuery(ReleaseConnection, {
-  args: {
-    type: releaseGroupType,
-    status: releaseStatus
-  }
-})
-export const releaseGroups = linkedQuery(ReleaseGroupConnection, {
-  args: {
-    type: releaseGroupType
-  }
-})
-export const series = linkedQuery(SeriesConnection)
-export const tags = linkedQuery(TagConnection, {
-  resolve: createSubqueryResolver({}, (value = [], args) => {
-    const connection = connectionFromArray(value, args)
-    return {
-      nodes: connection.edges.map(edge => edge.node),
-      totalCount: value.length,
-      ...connection
-    }
-  })
-})
-export const works = linkedQuery(WorkConnection)
-
 export const totalCount = {
   type: GraphQLInt,
   description: `A count of the total number of items in this connection,
-ignoring pagination.`
-}
+ignoring pagination.`,
+};
 
 export const score = {
   type: GraphQLInt,
   description: `The relevancy score (0–100) assigned by the search engine, if
-these results were found through a search.`
-}
+these results were found through a search.`,
+};
 
 export function connectionWithExtras(nodeType) {
   return connectionDefinitions({
@@ -304,10 +137,20 @@ export function connectionWithExtras(nodeType) {
       nodes: {
         type: new GraphQLList(nodeType),
         description: `A list of nodes in the connection (without going through the
-\`edges\` field).`
+\`edges\` field).`,
       },
-      totalCount
+      totalCount,
     }),
-    edgeFields: () => ({ score })
-  }).connectionType
+    edgeFields: () => ({ score }),
+  }).connectionType;
 }
+
+export const releaseGroupType = {
+  type: new GraphQLList(ReleaseGroupType),
+  description: 'Filter by one or more release group types.',
+};
+
+export const releaseStatus = {
+  type: new GraphQLList(ReleaseStatus),
+  description: 'Filter by one or more release statuses.',
+};

src/types/index.js

@@ -1,22 +1,27 @@
-export { DateType, DiscID, IPI, ISRC, ISWC, MBID, URLString } from './scalars'
-export { ReleaseGroupType, ReleaseStatus } from './enums'
-export { default as Node } from './node'
-export { default as Entity, EntityConnection } from './entity'
-export { default as Area, AreaConnection } from './area'
-export { default as Artist, ArtistConnection } from './artist'
-export { default as Collection, CollectionConnection } from './collection'
-export { default as Disc } from './disc'
-export { default as Event, EventConnection } from './event'
-export { default as Instrument, InstrumentConnection } from './instrument'
-export { default as Label, LabelConnection } from './label'
-export { default as Place, PlaceConnection } from './place'
-export { default as Recording, RecordingConnection } from './recording'
-export { default as Release, ReleaseConnection } from './release'
 export {
-  default as ReleaseGroup,
-  ReleaseGroupConnection
-} from './release-group'
-export { default as Series, SeriesConnection } from './series'
-export { default as Tag, TagConnection } from './tag'
-export { default as URL, URLConnection } from './url'
-export { default as Work, WorkConnection } from './work'
+  DateType,
+  DiscID,
+  IPI,
+  ISRC,
+  ISWC,
+  MBID,
+  URLString,
+} from './scalars.js';
+export { ReleaseGroupType, ReleaseStatus } from './enums.js';
+export { Node } from './node.js';
+export { Entity, EntityConnection } from './entity.js';
+export { Area, AreaConnection } from './area.js';
+export { Artist, ArtistConnection } from './artist.js';
+export { Collection, CollectionConnection } from './collection.js';
+export { Disc } from './disc.js';
+export { Event, EventConnection } from './event.js';
+export { Instrument, InstrumentConnection } from './instrument.js';
+export { Label, LabelConnection } from './label.js';
+export { Place, PlaceConnection } from './place.js';
+export { Recording, RecordingConnection } from './recording.js';
+export { Release, ReleaseConnection } from './release.js';
+export { ReleaseGroup, ReleaseGroupConnection } from './release-group.js';
+export { Series, SeriesConnection } from './series.js';
+export { Tag, TagConnection } from './tag.js';
+export { URL, URLConnection } from './url.js';
+export { Work, WorkConnection } from './work.js';

src/types/instrument.js

@@ -1,20 +1,23 @@
-import { GraphQLObjectType, GraphQLString } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
 import {
   fieldWithID,
   id,
   mbid,
   name,
   disambiguation,
-  aliases,
-  relationships,
-  collections,
-  tags,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { aliases } from './alias.js';
+import { collections } from './collection.js';
+import { relationships } from './relationship.js';
+import { tags } from './tag.js';
 
-const Instrument = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLString } = GraphQL;
+
+export const Instrument = new GraphQLObjectType({
   name: 'Instrument',
   description: `[Instruments](https://musicbrainz.org/doc/Instrument) are
 devices created or adapted to make musical sounds. Instruments are primarily
@@ -29,18 +32,19 @@ used in relationships between two other entities.`,
     description: {
       type: GraphQLString,
       description: `A brief description of the main characteristics of the
-instrument.`
+instrument.`,
     },
     ...fieldWithID('type', {
       description: `The type categorises the instrument by the way the sound is
 created, similar to the [Hornbostel-Sachs](https://en.wikipedia.org/wiki/Hornbostel%E2%80%93Sachs)
-classification.`
+classification.`,
     }),
     relationships,
     collections,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const InstrumentConnection = connectionWithExtras(Instrument)
-export default Instrument
+export const InstrumentConnection = connectionWithExtras(Instrument);
+
+export const instruments = linkedQuery(InstrumentConnection);

src/types/label.js

@@ -1,31 +1,29 @@
-import {
-  GraphQLObjectType,
-  GraphQLList,
-  GraphQLString,
-  GraphQLInt
-} from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
-import { IPI } from './scalars'
-import Area from './area'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
+import { IPI } from './scalars.js';
+import { Area } from './area.js';
 import {
   id,
   mbid,
   name,
   sortName,
   disambiguation,
-  aliases,
-  lifeSpan,
-  releases,
-  relationships,
-  collections,
-  tags,
-  rating,
   fieldWithID,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { aliases } from './alias.js';
+import { collections } from './collection.js';
+import { lifeSpan } from './life-span.js';
+import { tags } from './tag.js';
+import { rating } from './rating.js';
+import { relationships } from './relationship.js';
+import { releases } from './release.js';
 
-const Label = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLList, GraphQLString, GraphQLInt } = GraphQL;
+
+export const Label = new GraphQLObjectType({
   name: 'Label',
   description: `[Labels](https://musicbrainz.org/doc/Label) represent mostly
 (but not only) imprints. To a lesser extent, a label entity may be created to
@@ -40,34 +38,35 @@ represent a record company.`,
     aliases,
     country: {
       type: GraphQLString,
-      description: 'The country of origin for the label.'
+      description: 'The country of origin for the label.',
     },
     area: {
       type: Area,
-      description: 'The area in which the label is based.'
+      description: 'The area in which the label is based.',
     },
     lifeSpan,
     labelCode: {
       type: GraphQLInt,
       description: `The [“LC” code](https://musicbrainz.org/doc/Label/Label_Code)
-of the label.`
+of the label.`,
     },
     ipis: {
       type: new GraphQLList(IPI),
       description: `List of [Interested Parties Information](https://musicbrainz.org/doc/IPI)
-codes for the label.`
+codes for the label.`,
     },
     ...fieldWithID('type', {
       description: `A type describing the main activity of the label, e.g.
-imprint, production, distributor, rights society, etc.`
+imprint, production, distributor, rights society, etc.`,
     }),
     releases,
     relationships,
     collections,
     rating,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const LabelConnection = connectionWithExtras(Label)
-export default Label
+export const LabelConnection = connectionWithExtras(Label);
+
+export const labels = linkedQuery(LabelConnection);

src/types/life-span.js

@@ -1,22 +1,32 @@
-import { GraphQLObjectType, GraphQLBoolean } from 'graphql/type'
-import { DateType } from './scalars'
+import GraphQL from 'graphql';
+import { DateType } from './scalars.js';
+import { resolveHyphenated } from './helpers.js';
 
-export default new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLBoolean } = GraphQL;
+
+export const LifeSpan = new GraphQLObjectType({
   name: 'LifeSpan',
   description: `Fields indicating the begin and end date of an entity’s
 lifetime, including whether it has ended (even if the date is unknown).`,
   fields: () => ({
     begin: {
       type: DateType,
-      description: 'The start date of the entity’s life span.'
+      description: 'The start date of the entity’s life span.',
     },
     end: {
       type: DateType,
-      description: 'The end date of the entity’s life span.'
+      description: 'The end date of the entity’s life span.',
     },
     ended: {
       type: GraphQLBoolean,
-      description: 'Whether or not the entity’s life span has ended.'
-    }
-  })
-})
+      description: 'Whether or not the entity’s life span has ended.',
+    },
+  }),
+});
+
+export const lifeSpan = {
+  type: LifeSpan,
+  description: `The begin and end dates of the entity’s existence. Its exact
+meaning depends on the type of entity.`,
+  resolve: resolveHyphenated,
+};

src/types/media.js

@@ -1,15 +1,12 @@
-import {
-  GraphQLObjectType,
-  GraphQLList,
-  GraphQLString,
-  GraphQLInt
-} from 'graphql/type'
-import Disc from './disc'
-import Track from './track'
-import { resolveHyphenated, fieldWithID } from './helpers'
-import { createSubqueryResolver } from '../resolvers'
+import GraphQL from 'graphql';
+import { Disc } from './disc.js';
+import { Track } from './track.js';
+import { resolveHyphenated, fieldWithID } from './helpers.js';
+import { createSubqueryResolver } from '../resolvers.js';
 
-export default new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLList, GraphQLString, GraphQLInt } = GraphQL;
+
+export const Media = new GraphQLObjectType({
   name: 'Medium',
   description: `A medium is the actual physical medium the audio content is
 stored upon. This means that each CD in a multi-disc release will be entered as
@@ -19,34 +16,34 @@ cassette) and can optionally also have a title.`,
   fields: () => ({
     title: {
       type: GraphQLString,
-      description: 'The title of this particular medium.'
+      description: 'The title of this particular medium.',
     },
     ...fieldWithID('format', {
       description: `The [format](https://musicbrainz.org/doc/Release/Format) of
-the medium (e.g. CD, DVD, vinyl, cassette).`
+the medium (e.g. CD, DVD, vinyl, cassette).`,
     }),
     position: {
       type: GraphQLInt,
       description: `The order of this medium in the release (for example, in a
-multi-disc release).`
+multi-disc release).`,
     },
     trackCount: {
       type: GraphQLInt,
       description: 'The number of audio tracks on this medium.',
-      resolve: resolveHyphenated
+      resolve: resolveHyphenated,
     },
     discs: {
       type: new GraphQLList(Disc),
       description:
-        'A list of physical discs and their disc IDs for this medium.'
+        'A list of physical discs and their disc IDs for this medium.',
     },
     tracks: {
       type: new GraphQLList(Track),
       description: 'The list of tracks on the given media.',
       resolve: createSubqueryResolver({
         inc: 'recordings',
-        key: 'tracks'
-      })
-    }
-  })
-})
+        key: 'tracks',
+      }),
+    },
+  }),
+});

src/types/node.js

@@ -1,36 +1,17 @@
-import { nodeDefinitions, fromGlobalId } from 'graphql-relay'
-import { toDashed } from './helpers'
+import GraphQLRelay from 'graphql-relay';
+import { toDashed } from '../util.js';
+import { resolveType } from './helpers.js';
 
-const debug = require('debug')('graphbrainz:types/node')
-
-const TYPE_MODULES = {
-  discid: 'disc'
-}
+const { nodeDefinitions, fromGlobalId } = GraphQLRelay;
 
 const { nodeInterface, nodeField } = nodeDefinitions(
   (globalID, { loaders }) => {
-    const { type, id } = fromGlobalId(globalID)
-    const entityType = toDashed(type)
-    return loaders.lookup.load([entityType, id])
+    const { type, id } = fromGlobalId(globalID);
+    const entityType = toDashed(type);
+    return loaders.lookup.load([entityType, id]);
   },
-  (obj, context, info) => {
-    const type = TYPE_MODULES[obj._type] || obj._type
-    if (type) {
-      let originalType
-      try {
-        originalType = require(`./${type}`).default
-      } catch (err) {
-        debug(`Failed to load type: ${type}`)
-        return
-      }
-      // Don't use `originalType`! The schema may have been extended in which
-      // case the types have all been replaced. Instead, find the current type
-      // of the same name.
-      const typeMap = info.schema.getTypeMap()
-      return typeMap[originalType.name]
-    }
-  }
-)
+  resolveType
+);
 
-export default nodeInterface
-export { nodeInterface, nodeField }
+export const Node = nodeInterface;
+export { nodeInterface, nodeField };

src/types/place.js

@@ -1,22 +1,25 @@
-import { GraphQLObjectType, GraphQLString } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
-import { Degrees } from './scalars'
-import Area from './area'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
+import { Degrees } from './scalars.js';
+import { Area } from './area.js';
 import {
   id,
   mbid,
   name,
   disambiguation,
-  aliases,
-  lifeSpan,
-  events,
   fieldWithID,
-  relationships,
-  collections,
-  tags,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { aliases } from './alias.js';
+import { collections } from './collection.js';
+import { events } from './event.js';
+import { lifeSpan } from './life-span.js';
+import { relationships } from './relationship.js';
+import { tags } from './tag.js';
+
+const { GraphQLObjectType, GraphQLString } = GraphQL;
 
 export const Coordinates = new GraphQLObjectType({
   name: 'Coordinates',
@@ -24,16 +27,17 @@ export const Coordinates = new GraphQLObjectType({
   fields: () => ({
     latitude: {
       type: Degrees,
-      description: 'The north–south position of a point on the Earth’s surface.'
+      description:
+        'The north–south position of a point on the Earth’s surface.',
     },
     longitude: {
       type: Degrees,
-      description: 'The east–west position of a point on the Earth’s surface.'
-    }
-  })
-})
+      description: 'The east–west position of a point on the Earth’s surface.',
+    },
+  }),
+});
 
-const Place = new GraphQLObjectType({
+export const Place = new GraphQLObjectType({
   name: 'Place',
   description: `A [place](https://musicbrainz.org/doc/Place) is a venue, studio,
 or other place where music is performed, recorded, engineered, etc.`,
@@ -47,28 +51,29 @@ or other place where music is performed, recorded, engineered, etc.`,
     address: {
       type: GraphQLString,
       description: `The address describes the location of the place using the
-standard addressing format for the country it is located in.`
+standard addressing format for the country it is located in.`,
     },
     area: {
       type: Area,
       description: `The area entity representing the area, such as the city, in
-which the place is located.`
+which the place is located.`,
     },
     coordinates: {
       type: Coordinates,
-      description: 'The geographic coordinates of the place.'
+      description: 'The geographic coordinates of the place.',
     },
     lifeSpan,
     ...fieldWithID('type', {
       description: `The type categorises the place based on its primary
-function.`
+function.`,
     }),
     events,
     relationships,
     collections,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const PlaceConnection = connectionWithExtras(Place)
-export default Place
+export const PlaceConnection = connectionWithExtras(Place);
+
+export const places = linkedQuery(PlaceConnection);

src/types/rating.js

@@ -1,11 +1,9 @@
-import {
-  GraphQLObjectType,
-  GraphQLNonNull,
-  GraphQLInt,
-  GraphQLFloat
-} from 'graphql/type'
+import GraphQL from 'graphql';
+import { createSubqueryResolver } from '../resolvers.js';
 
-export default new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLNonNull, GraphQLInt, GraphQLFloat } = GraphQL;
+
+export const Rating = new GraphQLObjectType({
   name: 'Rating',
   description: `[Ratings](https://musicbrainz.org/doc/Rating_System) allow users
 to rate MusicBrainz entities. User may assign a value between 1 and 5; these
@@ -15,11 +13,17 @@ for the entity.`,
     voteCount: {
       type: new GraphQLNonNull(GraphQLInt),
       description: 'The number of votes that have contributed to the rating.',
-      resolve: rating => rating['votes-count']
+      resolve: (rating) => rating['votes-count'],
     },
     value: {
       type: GraphQLFloat,
-      description: 'The average rating value based on the aggregated votes.'
-    }
-  })
-})
+      description: 'The average rating value based on the aggregated votes.',
+    },
+  }),
+});
+
+export const rating = {
+  type: Rating,
+  description: 'The rating users have given to this entity.',
+  resolve: createSubqueryResolver({ inc: 'ratings' }),
+};

src/types/recording.js

@@ -1,25 +1,27 @@
-import { GraphQLObjectType, GraphQLList, GraphQLBoolean } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
-import { Duration, ISRC } from './scalars'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
+import { Duration, ISRC } from './scalars.js';
 import {
   id,
   mbid,
   title,
   disambiguation,
-  aliases,
-  artistCredit,
-  artistCredits,
-  artists,
-  releases,
-  relationships,
-  collections,
-  rating,
-  tags,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { aliases } from './alias.js';
+import { artists } from './artist.js';
+import { artistCredit, artistCredits } from './artist-credit.js';
+import { collections } from './collection.js';
+import { tags } from './tag.js';
+import { rating } from './rating.js';
+import { relationships } from './relationship.js';
+import { releases } from './release.js';
 
-const Recording = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLList, GraphQLBoolean } = GraphQL;
+
+export const Recording = new GraphQLObjectType({
   name: 'Recording',
   description: `A [recording](https://musicbrainz.org/doc/Recording) is an
 entity in MusicBrainz which can be linked to tracks on releases. Each track must
@@ -48,33 +50,34 @@ or mixing.`,
 (ISRCs) for this recording.`,
       resolve: (source, args, context) => {
         if (source.isrcs) {
-          return source.isrcs
+          return source.isrcs;
         }
         // TODO: Add support for parent entities knowing to include this `inc`
         // parameter in their own calls by inspecting what fields are requested
         // or batching things at the loader level.
         return context.loaders.lookup
           .load(['recording', source.id, { inc: 'isrcs' }])
-          .then(recording => recording.isrcs)
-      }
+          .then((recording) => recording.isrcs);
+      },
     },
     length: {
       type: Duration,
       description: `An approximation to the length of the recording, calculated
-from the lengths of the tracks using it.`
+from the lengths of the tracks using it.`,
     },
     video: {
       type: GraphQLBoolean,
-      description: 'Whether this is a video recording.'
+      description: 'Whether this is a video recording.',
     },
     artists,
     releases,
     relationships,
     collections,
     rating,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const RecordingConnection = connectionWithExtras(Recording)
-export default Recording
+export const RecordingConnection = connectionWithExtras(Recording);
+
+export const recordings = linkedQuery(RecordingConnection);

src/types/relationship.js

@@ -1,15 +1,25 @@
+import GraphQL from 'graphql';
+import GraphQLRelay from 'graphql-relay';
+import { DateType } from './scalars.js';
+import { Entity } from './entity.js';
 import {
+  resolveHyphenated,
+  fieldWithID,
+  connectionWithExtras,
+} from './helpers.js';
+import { resolveRelationship, includeRelationships } from '../resolvers.js';
+import { toDashed } from '../util.js';
+
+const {
   GraphQLObjectType,
   GraphQLNonNull,
   GraphQLString,
   GraphQLList,
-  GraphQLBoolean
-} from 'graphql/type'
-import { DateType } from './scalars'
-import Entity from './entity'
-import { resolveHyphenated, fieldWithID, connectionWithExtras } from './helpers'
+  GraphQLBoolean,
+} = GraphQL;
+const { connectionArgs } = GraphQLRelay;
 
-const Relationship = new GraphQLObjectType({
+export const Relationship = new GraphQLObjectType({
   name: 'Relationship',
   description: `[Relationships](https://musicbrainz.org/doc/Relationships) are a
 way to represent all the different ways in which entities are connected to each
@@ -18,63 +28,112 @@ other and to URLs outside MusicBrainz.`,
     target: {
       type: new GraphQLNonNull(Entity),
       description: 'The target entity.',
-      resolve: source => {
-        const targetType = source['target-type']
-        const target = source[targetType]
-        target._type = targetType.replace('_', '-')
-        return target
-      }
+      resolve: (source) => {
+        const targetType = source['target-type'];
+        const target = source[targetType];
+        target._type = targetType.replace('_', '-');
+        return target;
+      },
     },
     direction: {
       type: new GraphQLNonNull(GraphQLString),
-      description: 'The direction of the relationship.'
+      description: 'The direction of the relationship.',
     },
     targetType: {
       type: new GraphQLNonNull(GraphQLString),
       description:
         'The type of entity on the receiving end of the relationship.',
-      resolve: resolveHyphenated
+      resolve: resolveHyphenated,
     },
     sourceCredit: {
       type: GraphQLString,
       description: `How the source entity was actually credited, if different
 from its main (performance) name.`,
-      resolve: resolveHyphenated
+      resolve: resolveHyphenated,
     },
     targetCredit: {
       type: GraphQLString,
       description: `How the target entity was actually credited, if different
 from its main (performance) name.`,
-      resolve: resolveHyphenated
+      resolve: resolveHyphenated,
     },
     begin: {
       type: DateType,
-      description: 'The date on which the relationship became applicable.'
+      description: 'The date on which the relationship became applicable.',
     },
     end: {
       type: DateType,
       description:
-        'The date on which the relationship became no longer applicable.'
+        'The date on which the relationship became no longer applicable.',
     },
     ended: {
       type: GraphQLBoolean,
-      description: 'Whether the relationship still applies.'
+      description: 'Whether the relationship still applies.',
     },
     attributes: {
       type: new GraphQLList(GraphQLString),
       description: `Attributes which modify the relationship. There is a [list
 of all attributes](https://musicbrainz.org/relationship-attributes), but the
 attributes which are available, and how they should be used, depends on the
-relationship type.`
+relationship type.`,
     },
     // There doesn't seem to be any documentation for the `attribute-values`
     // field.
     // attributeValues: {},
     ...fieldWithID('type', {
-      description: 'The type of relationship.'
-    })
-  })
-})
+      description: 'The type of relationship.',
+    }),
+  }),
+});
 
-export const RelationshipConnection = connectionWithExtras(Relationship)
-export default Relationship
+export const RelationshipConnection = connectionWithExtras(Relationship);
+
+export const relationship = {
+  type: RelationshipConnection,
+  description: 'A list of relationships between these two entity types.',
+  args: {
+    direction: {
+      type: GraphQLString,
+      description: 'Filter by the relationship direction.',
+    },
+    ...fieldWithID('type', {
+      description: 'Filter by the relationship type.',
+    }),
+    ...connectionArgs,
+  },
+  resolve: resolveRelationship,
+};
+
+export const relationships = {
+  type: new GraphQLObjectType({
+    name: 'Relationships',
+    description: 'Lists of entity relationships for each entity type.',
+    fields: () => ({
+      areas: relationship,
+      artists: relationship,
+      events: relationship,
+      instruments: relationship,
+      labels: relationship,
+      places: relationship,
+      recordings: relationship,
+      releases: relationship,
+      releaseGroups: relationship,
+      series: relationship,
+      urls: relationship,
+      works: relationship,
+    }),
+  }),
+  description: 'Relationships between this entity and other entitites.',
+  resolve: (entity, args, { loaders }, info) => {
+    let promise;
+    if (entity.relations != null) {
+      promise = Promise.resolve(entity);
+    } else {
+      const entityType = toDashed(info.parentType.name);
+      const id = entity.id;
+      const params = includeRelationships({}, info);
+      promise = loaders.lookup.load([entityType, id, params]);
+    }
+    return promise.then((entity) => entity.relations);
+  },
+};

src/types/release-event.js

@@ -1,13 +1,15 @@
-import { GraphQLObjectType } from 'graphql/type'
-import { DateType } from './scalars'
-import Area from './area'
+import GraphQL from 'graphql';
+import { DateType } from './scalars.js';
+import { Area } from './area.js';
 
-export default new GraphQLObjectType({
+const { GraphQLObjectType } = GraphQL;
+
+export const ReleaseEvent = new GraphQLObjectType({
   name: 'ReleaseEvent',
   description: `The date on which a release was issued in a country/region with
 a particular label, catalog number, barcode, and format.`,
   fields: () => ({
     area: { type: Area },
-    date: { type: DateType }
-  })
-})
+    date: { type: DateType },
+  }),
+});

src/types/release-group.js

@@ -1,28 +1,31 @@
-import { GraphQLObjectType, GraphQLList } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
-import { DateType } from './scalars'
-import { ReleaseGroupType } from './enums'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
+import { DateType } from './scalars.js';
+import { ReleaseGroupType } from './enums.js';
 import {
   id,
   mbid,
   title,
   disambiguation,
-  aliases,
-  artistCredit,
-  artistCredits,
-  artists,
-  releases,
-  relationships,
-  collections,
-  rating,
-  tags,
   fieldWithID,
+  releaseGroupType,
   resolveHyphenated,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { aliases } from './alias.js';
+import { artistCredit, artistCredits } from './artist-credit.js';
+import { artists } from './artist.js';
+import { releases } from './release.js';
+import { relationships } from './relationship.js';
+import { collections } from './collection.js';
+import { rating } from './rating.js';
+import { tags } from './tag.js';
 
-const ReleaseGroup = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLList } = GraphQL;
+
+export const ReleaseGroup = new GraphQLObjectType({
   name: 'ReleaseGroup',
   description: `A [release group](https://musicbrainz.org/doc/Release_Group) is
 used to group several different releases into a single logical entity. Every
@@ -44,28 +47,33 @@ album – it doesn’t matter how many CDs or editions/versions it had.`,
     firstReleaseDate: {
       type: DateType,
       description: 'The date of the earliest release in the group.',
-      resolve: resolveHyphenated
+      resolve: resolveHyphenated,
     },
     ...fieldWithID('primaryType', {
       type: ReleaseGroupType,
       description: `The [type](https://musicbrainz.org/doc/Release_Group/Type)
 of a release group describes what kind of releases the release group represents,
 e.g. album, single, soundtrack, compilation, etc. A release group can have a
-“main” type and an unspecified number of additional types.`
+“main” type and an unspecified number of additional types.`,
     }),
     ...fieldWithID('secondaryTypes', {
       type: new GraphQLList(ReleaseGroupType),
       description: `Additional [types](https://musicbrainz.org/doc/Release_Group/Type)
-that apply to this release group.`
+that apply to this release group.`,
     }),
     artists,
     releases,
     relationships,
     collections,
     rating,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const ReleaseGroupConnection = connectionWithExtras(ReleaseGroup)
-export default ReleaseGroup
+export const ReleaseGroupConnection = connectionWithExtras(ReleaseGroup);
+
+export const releaseGroups = linkedQuery(ReleaseGroupConnection, {
+  args: {
+    type: releaseGroupType,
+  },
+});

src/types/release.js

@@ -1,31 +1,35 @@
-import { GraphQLObjectType, GraphQLString, GraphQLList } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
-import { ASIN, DateType } from './scalars'
-import Media from './media'
-import { ReleaseStatus } from './enums'
-import ReleaseEvent from './release-event'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
+import { ASIN, DateType } from './scalars.js';
+import { Media } from './media.js';
+import { ReleaseStatus } from './enums.js';
+import { ReleaseEvent } from './release-event.js';
 import {
   id,
   mbid,
   title,
   disambiguation,
-  aliases,
-  artistCredit,
-  artistCredits,
-  artists,
-  labels,
-  recordings,
-  releaseGroups,
-  relationships,
-  collections,
-  tags,
   fieldWithID,
+  releaseGroupType,
+  releaseStatus,
   resolveHyphenated,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { aliases } from './alias.js';
+import { artistCredit, artistCredits } from './artist-credit.js';
+import { artists } from './artist.js';
+import { collections } from './collection.js';
+import { labels } from './label.js';
+import { recordings } from './recording.js';
+import { relationships } from './relationship.js';
+import { releaseGroups } from './release-group.js';
+import { tags } from './tag.js';
 
-const Release = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLString, GraphQLList } = GraphQL;
+
+export const Release = new GraphQLObjectType({
   name: 'Release',
   description: `A [release](https://musicbrainz.org/doc/Release) represents the
 unique release (i.e. issuing) of a product on a specific date with specific
@@ -44,48 +48,48 @@ MusicBrainz as one release.`,
     releaseEvents: {
       type: new GraphQLList(ReleaseEvent),
       description: 'The release events for this release.',
-      resolve: resolveHyphenated
+      resolve: resolveHyphenated,
     },
     date: {
       type: DateType,
       description: `The [release date](https://musicbrainz.org/doc/Release/Date)
 is the date in which a release was made available through some sort of
-distribution mechanism.`
+distribution mechanism.`,
     },
     country: {
       type: GraphQLString,
-      description: 'The country in which the release was issued.'
+      description: 'The country in which the release was issued.',
     },
     asin: {
       type: ASIN,
       description: `The [Amazon Standard Identification Number](https://musicbrainz.org/doc/ASIN)
-of the release.`
+of the release.`,
     },
     barcode: {
       type: GraphQLString,
       description: `The [barcode](https://en.wikipedia.org/wiki/Barcode), if the
 release has one. The most common types found on releases are 12-digit
 [UPCs](https://en.wikipedia.org/wiki/Universal_Product_Code) and 13-digit
-[EANs](https://en.wikipedia.org/wiki/International_Article_Number).`
+[EANs](https://en.wikipedia.org/wiki/International_Article_Number).`,
     },
     ...fieldWithID('status', {
       type: ReleaseStatus,
-      description: 'The status describes how “official” a release is.'
+      description: 'The status describes how “official” a release is.',
     }),
     ...fieldWithID('packaging', {
       description: `The physical packaging that accompanies the release. See
 the [list of packaging](https://musicbrainz.org/doc/Release/Packaging) for more
-information.`
+information.`,
     }),
     quality: {
       type: GraphQLString,
       description: `Data quality indicates how good the data for a release is.
 It is not a mark of how good or bad the music itself is – for that, use
-[ratings](https://musicbrainz.org/doc/Rating_System).`
+[ratings](https://musicbrainz.org/doc/Rating_System).`,
     },
     media: {
       type: new GraphQLList(Media),
-      description: 'The media on which the release was distributed.'
+      description: 'The media on which the release was distributed.',
     },
     artists,
     labels,
@@ -93,9 +97,15 @@ It is not a mark of how good or bad the music itself is – for that, use
     releaseGroups,
     relationships,
     collections,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const ReleaseConnection = connectionWithExtras(Release)
-export default Release
+export const ReleaseConnection = connectionWithExtras(Release);
+
+export const releases = linkedQuery(ReleaseConnection, {
+  args: {
+    type: releaseGroupType,
+    status: releaseStatus,
+  },
+});

src/types/scalars.js

@@ -1,70 +1,71 @@
-import { Kind } from 'graphql/language'
-import { GraphQLScalarType } from 'graphql/type'
+import GraphQL from 'graphql';
+
+const { Kind, GraphQLScalarType } = GraphQL;
 
 function createScalar(config) {
   return new GraphQLScalarType({
-    serialize: value => value,
-    parseValue: value => value,
+    serialize: (value) => value,
+    parseValue: (value) => value,
     parseLiteral(ast) {
       if (ast.kind === Kind.STRING) {
-        return ast.value
+        return ast.value;
       }
-      return undefined
+      return undefined;
     },
-    ...config
-  })
+    ...config,
+  });
 }
 
-const uuid = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/
-const locale = /^([a-z]{2})(_[A-Z]{2})?(\.[a-zA-Z0-9-]+)?$/
+const uuid = /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/;
+const locale = /^([a-z]{2})(_[A-Z]{2})?(\.[a-zA-Z0-9-]+)?$/;
 // Be extremely lenient; just prevent major input errors.
-const url = /^\w+:\/\/[\w-]+\.\w+/
+const url = /^\w+:\/\/[\w-]+\.\w+/;
 
 function validateMBID(value) {
   if (typeof value === 'string' && uuid.test(value)) {
-    return value
+    return value;
   }
-  throw new TypeError(`Malformed MBID: ${value}`)
+  throw new TypeError(`Malformed MBID: ${value}`);
 }
 
 function validatePositive(value) {
   if (value >= 0) {
-    return value
+    return value;
   }
-  throw new TypeError(`Expected positive value: ${value}`)
+  throw new TypeError(`Expected positive value: ${value}`);
 }
 
 function validateLocale(value) {
   if (typeof value === 'string' && locale.test(value)) {
-    return value
+    return value;
   }
-  throw new TypeError(`Malformed locale: ${value}`)
+  throw new TypeError(`Malformed locale: ${value}`);
 }
 
 function validateURL(value) {
   if (typeof value === 'string' && url.test(value)) {
-    return value
+    return value;
   }
-  throw new TypeError(`Malformed URL: ${value}`)
+  throw new TypeError(`Malformed URL: ${value}`);
 }
 
 export const ASIN = createScalar({
   name: 'ASIN',
   description: `An [Amazon Standard Identification Number](https://musicbrainz.org/doc/ASIN)
 (ASIN) is a 10-character alphanumeric unique identifier assigned by Amazon.com
-and its partners for product identification within the Amazon organization.`
-})
+and its partners for product identification within the Amazon organization.`,
+});
 
 export const DateType = createScalar({
   name: 'Date',
   description:
-    'Year, month (optional), and day (optional) in YYYY-MM-DD format.'
-})
+    'Year, month (optional), and day (optional) in YYYY-MM-DD format.',
+});
 
 export const Degrees = createScalar({
   name: 'Degrees',
-  description: 'Decimal degrees, used for latitude and longitude.'
-})
+  description: 'Decimal degrees, used for latitude and longitude.',
+});
 
 export const DiscID = createScalar({
   name: 'DiscID',
@@ -80,8 +81,8 @@ Different pressing of a CD often have slightly different frame offsets, and
 hence different disc IDs.
 
 Conversely, two different CDs may happen to have exactly the same set of frame
-offsets and hence the same disc ID.`
-})
+offsets and hence the same disc ID.`,
+});
 
 export const Duration = createScalar({
   name: 'Duration',
@@ -90,25 +91,25 @@ export const Duration = createScalar({
   parseValue: validatePositive,
   parseLiteral(ast) {
     if (ast.kind === Kind.INT) {
-      return validatePositive(parseInt(ast.value, 10))
+      return validatePositive(parseInt(ast.value, 10));
     }
-    return undefined
-  }
-})
+    return undefined;
+  },
+});
 
 export const IPI = createScalar({
   name: 'IPI',
   description: `An [Interested Parties Information](https://musicbrainz.org/doc/IPI)
 (IPI) code is an identifying number assigned by the CISAC database for musical
-rights management.`
-})
+rights management.`,
+});
 
 export const ISNI = createScalar({
   name: 'ISNI',
   description: `The [International Standard Name Identifier](https://musicbrainz.org/doc/ISNI)
 (ISNI) is an ISO standard for uniquely identifying the public identities of
-contributors to media content.`
-})
+contributors to media content.`,
+});
 
 export const ISRC = createScalar({
   name: 'ISRC',
@@ -121,15 +122,15 @@ not the song itself. Therefore, different recordings, edits, remixes and
 remasters of the same song will each be assigned their own ISRC. However, note
 that same recording should carry the same ISRC in all countries/territories.
 Songs are identified by analogous [International Standard Musical Work Codes](https://musicbrainz.org/doc/ISWC)
-(ISWCs).`
-})
+(ISWCs).`,
+});
 
 export const ISWC = createScalar({
   name: 'ISWC',
   description: `The [International Standard Musical Work Code](https://musicbrainz.org/doc/ISWC)
 (ISWC) is an ISO standard similar to ISBNs for identifying musical works /
-compositions.`
-})
+compositions.`,
+});
 
 export const Locale = createScalar({
   name: 'Locale',
@@ -138,11 +139,11 @@ export const Locale = createScalar({
   parseValue: validateLocale,
   parseLiteral(ast) {
     if (ast.kind === Kind.STRING) {
-      return validateLocale(ast.value)
+      return validateLocale(ast.value);
     }
-    return undefined
-  }
-})
+    return undefined;
+  },
+});
 
 export const MBID = createScalar({
   name: 'MBID',
@@ -152,16 +153,16 @@ export const MBID = createScalar({
   parseValue: validateMBID,
   parseLiteral(ast) {
     if (ast.kind === Kind.STRING) {
-      return validateMBID(ast.value)
+      return validateMBID(ast.value);
     }
-    return undefined
-  }
-})
+    return undefined;
+  },
+});
 
 export const Time = createScalar({
   name: 'Time',
-  description: 'A time of day, in 24-hour hh:mm notation.'
-})
+  description: 'A time of day, in 24-hour hh:mm notation.',
+});
 
 export const URLString = createScalar({
   name: 'URLString',
@@ -170,8 +171,8 @@ export const URLString = createScalar({
   parseValue: validateURL,
   parseLiteral(ast) {
     if (ast.kind === Kind.STRING) {
-      return validateURL(ast.value)
+      return validateURL(ast.value);
     }
-    return undefined
-  }
-})
+    return undefined;
+  },
+});

src/types/series.js

@@ -1,19 +1,22 @@
-import { GraphQLObjectType } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
 import {
   id,
   mbid,
   name,
   disambiguation,
-  relationships,
-  collections,
-  tags,
   fieldWithID,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { collections } from './collection.js';
+import { relationships } from './relationship.js';
+import { tags } from './tag.js';
 
-const Series = new GraphQLObjectType({
+const { GraphQLObjectType } = GraphQL;
+
+export const Series = new GraphQLObjectType({
   name: 'Series',
   description: `A [series](https://musicbrainz.org/doc/Series) is a sequence of
 separate release groups, releases, recordings, works or events with a common
@@ -26,13 +29,14 @@ theme.`,
     disambiguation,
     ...fieldWithID('type', {
       description: `The type primarily describes what type of entity the series
-contains.`
+contains.`,
     }),
     relationships,
     collections,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const SeriesConnection = connectionWithExtras(Series)
-export default Series
+export const SeriesConnection = connectionWithExtras(Series);
+
+export const series = linkedQuery(SeriesConnection);

src/types/tag.js

@@ -1,12 +1,17 @@
-import {
+import GraphQL from 'graphql';
+import GraphQLRelay from 'graphql-relay';
+import { connectionWithExtras, linkedQuery } from './helpers.js';
+import { createSubqueryResolver } from '../resolvers.js';
+
+const {
   GraphQLObjectType,
   GraphQLNonNull,
   GraphQLString,
-  GraphQLInt
-} from 'graphql/type'
-import { connectionWithExtras } from './helpers'
+  GraphQLInt,
+} = GraphQL;
+const { connectionFromArray } = GraphQLRelay;
 
-const Tag = new GraphQLObjectType({
+export const Tag = new GraphQLObjectType({
   name: 'Tag',
   description: `[Tags](https://musicbrainz.org/tags) are a way to mark entities
 with extra information – for example, the genres that apply to an artist,
@@ -14,14 +19,24 @@ release, or recording.`,
   fields: () => ({
     name: {
       type: new GraphQLNonNull(GraphQLString),
-      description: 'The tag label.'
+      description: 'The tag label.',
     },
     count: {
       type: GraphQLInt,
-      description: 'How many times this tag has been applied to the entity.'
-    }
-  })
-})
+      description: 'How many times this tag has been applied to the entity.',
+    },
+  }),
+});
 
-export const TagConnection = connectionWithExtras(Tag)
-export default Tag
+export const TagConnection = connectionWithExtras(Tag);
+
+export const tags = linkedQuery(TagConnection, {
+  resolve: createSubqueryResolver({}, (value = [], args) => {
+    const connection = connectionFromArray(value, args);
+    return {
+      nodes: connection.edges.map((edge) => edge.node),
+      totalCount: value.length,
+      ...connection,
+    };
+  }),
+});

src/types/track.js

@@ -1,10 +1,12 @@
-import { GraphQLObjectType, GraphQLInt, GraphQLString } from 'graphql/type'
-import Entity from './entity'
-import { Duration } from './scalars'
-import Recording from './recording'
-import { mbid, title } from './helpers'
+import GraphQL from 'graphql';
+import { Entity } from './entity.js';
+import { Duration } from './scalars.js';
+import { Recording } from './recording.js';
+import { mbid, title } from './helpers.js';
 
-export default new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLInt, GraphQLString } = GraphQL;
+
+export const Track = new GraphQLObjectType({
   name: 'Track',
   description: `A track is the way a recording is represented on a particular
   release (or, more exactly, on a particular medium). Every track has a title
@@ -16,27 +18,27 @@ export default new GraphQLObjectType({
     position: {
       type: GraphQLInt,
       description: `The track’s position on the overall release (including all
-tracks from all discs).`
+tracks from all discs).`,
     },
     number: {
       type: GraphQLString,
       description: `The track number, which may include information about the
-disc or side it appears on, e.g. “A1” or “B3”.`
+disc or side it appears on, e.g. “A1” or “B3”.`,
     },
     length: {
       type: Duration,
-      description: 'The length of the track.'
+      description: 'The length of the track.',
     },
     recording: {
       type: Recording,
       description: 'The recording that appears on the track.',
-      resolve: source => {
-        const { recording } = source
+      resolve: (source) => {
+        const { recording } = source;
         if (recording) {
-          recording._type = 'recording'
+          recording._type = 'recording';
         }
-        return recording
-      }
-    }
-  })
-})
+        return recording;
+      },
+    },
+  }),
+});

src/types/url.js

@@ -1,10 +1,13 @@
-import { GraphQLObjectType, GraphQLNonNull } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
-import { URLString } from './scalars'
-import { id, mbid, relationships, connectionWithExtras } from './helpers'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
+import { URLString } from './scalars.js';
+import { id, mbid, connectionWithExtras } from './helpers.js';
+import { relationships } from './relationship.js';
 
-const URL = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLNonNull } = GraphQL;
+
+export const URL = new GraphQLObjectType({
   name: 'URL',
   description: `A [URL](https://musicbrainz.org/doc/URL) pointing to a resource
 external to MusicBrainz, i.e. an official homepage, a site where music can be
@@ -15,11 +18,10 @@ acquired, an entry in another database, etc.`,
     mbid,
     resource: {
       type: new GraphQLNonNull(URLString),
-      description: 'The actual URL string.'
+      description: 'The actual URL string.',
     },
-    relationships
-  })
-})
+    relationships,
+  }),
+});
 
-export const URLConnection = connectionWithExtras(URL)
-export default URL
+export const URLConnection = connectionWithExtras(URL);

src/types/work.js

@@ -1,22 +1,25 @@
-import { GraphQLObjectType, GraphQLString, GraphQLList } from 'graphql/type'
-import Node from './node'
-import Entity from './entity'
+import GraphQL from 'graphql';
+import { Node } from './node.js';
+import { Entity } from './entity.js';
 import {
   id,
   mbid,
   title,
   disambiguation,
-  aliases,
-  artists,
-  relationships,
-  collections,
-  rating,
-  tags,
   fieldWithID,
-  connectionWithExtras
-} from './helpers'
+  connectionWithExtras,
+  linkedQuery,
+} from './helpers.js';
+import { aliases } from './alias.js';
+import { artists } from './artist.js';
+import { collections } from './collection.js';
+import { rating } from './rating.js';
+import { relationships } from './relationship.js';
+import { tags } from './tag.js';
 
-const Work = new GraphQLObjectType({
+const { GraphQLObjectType, GraphQLString, GraphQLList } = GraphQL;
+
+export const Work = new GraphQLObjectType({
   name: 'Work',
   description: `A [work](https://musicbrainz.org/doc/Work) is a distinct
 intellectual or artistic creation, which can be expressed in the form of one or
@@ -31,22 +34,23 @@ more audio recordings.`,
     iswcs: {
       type: new GraphQLList(GraphQLString),
       description: `A list of [ISWCs](https://musicbrainz.org/doc/ISWC) assigned
-to the work by copyright collecting agencies.`
+to the work by copyright collecting agencies.`,
     },
     language: {
       type: GraphQLString,
-      description: 'The language in which the work was originally written.'
+      description: 'The language in which the work was originally written.',
     },
     ...fieldWithID('type', {
-      description: 'The type of work.'
+      description: 'The type of work.',
     }),
     artists,
     relationships,
     collections,
     rating,
-    tags
-  })
-})
+    tags,
+  }),
+});
 
-export const WorkConnection = connectionWithExtras(Work)
-export default Work
+export const WorkConnection = connectionWithExtras(Work);
+
+export const works = linkedQuery(WorkConnection);

src/util.js

@@ -1,6 +1,8 @@
-import util from 'util'
+import util from 'util';
+import dashify from 'dashify';
+import pascalCase from 'pascalcase';
 
-export const ONE_DAY = 24 * 60 * 60 * 1000
+export const ONE_DAY = 24 * 60 * 60 * 1000;
 
 export function getFields(
   info,
@@ -9,57 +11,89 @@ export function getFields(
   prefix = ''
 ) {
   if (info.kind !== 'Field') {
-    info = info.fieldNodes[0]
+    info = info.fieldNodes[0];
   }
-  const selections = info.selectionSet.selections
+  const selections = info.selectionSet.selections;
   const reducer = (fields, selection) => {
     if (selection.kind === 'FragmentSpread') {
-      const name = selection.name.value
-      const fragment = fragments[name]
+      const name = selection.name.value;
+      const fragment = fragments[name];
       if (!fragment) {
-        throw new Error(`Fragment '${name}' was not passed to getFields()`)
+        throw new Error(`Fragment '${name}' was not passed to getFields()`);
       }
-      fragment.selectionSet.selections.reduce(reducer, fields)
+      fragment.selectionSet.selections.reduce(reducer, fields);
     } else if (selection.kind === 'InlineFragment') {
-      selection.selectionSet.selections.reduce(reducer, fields)
+      selection.selectionSet.selections.reduce(reducer, fields);
     } else {
-      const prefixedName = prefix + selection.name.value
-      fields[prefixedName] = selection
+      const prefixedName = prefix + selection.name.value;
+      fields[prefixedName] = selection;
       if (depth > 0 && selection.selectionSet) {
         const subFields = getFields(
           selection,
           fragments,
           depth - 1,
           `${prefixedName}.`
-        )
-        Object.assign(fields, subFields)
+        );
+        Object.assign(fields, subFields);
       }
     }
-    return fields
-  }
-  return selections.reduce(reducer, {})
+    return fields;
+  };
+  return selections.reduce(reducer, {});
 }
 
 export function prettyPrint(
   obj,
   { depth = 5, colors = true, breakLength = 120 } = {}
 ) {
-  console.log(util.inspect(obj, { depth, colors, breakLength }))
+  console.log(util.inspect(obj, { depth, colors, breakLength }));
 }
 
 export function toFilteredArray(obj) {
-  return (Array.isArray(obj) ? obj : [obj]).filter(x => x)
+  return (Array.isArray(obj) ? obj : [obj]).filter((x) => x);
 }
 
 export function extendIncludes(includes, moreIncludes) {
-  includes = toFilteredArray(includes)
-  moreIncludes = toFilteredArray(moreIncludes)
-  const seen = {}
-  return includes.concat(moreIncludes).filter(x => {
+  includes = toFilteredArray(includes);
+  moreIncludes = toFilteredArray(moreIncludes);
+  const seen = {};
+  return includes.concat(moreIncludes).filter((x) => {
     if (seen[x]) {
-      return false
+      return false;
     }
-    seen[x] = true
-    return true
-  })
+    seen[x] = true;
+    return true;
+  });
+}
+
+export const toPascal = pascalCase;
+export const toDashed = dashify;
+
+export function toPlural(name) {
+  return name.endsWith('s') ? name : name + 's';
+}
+
+export function toSingular(name) {
+  return name.endsWith('s') && !/series/i.test(name) ? name.slice(0, -1) : name;
+}
+
+export function toWords(name) {
+  return toPascal(name).replace(/([^A-Z])?([A-Z]+)/g, (match, tail, head) => {
+    tail = tail ? tail + ' ' : '';
+    head = head.length > 1 ? head : head.toLowerCase();
+    return `${tail}${head}`;
+  });
+}
+
+export function filterObjectValues(obj, filter) {
+  return Object.entries(obj).reduce((obj, [key, value]) => {
+    if (filter(value)) {
+      obj[key] = value;
+    }
+    return obj;
+  }, {});
+}
+
+export function getTypeName(value) {
+  return Object.prototype.toString.call(value).slice(8, -1);
 }

test/_schema.js

@@ -1,27 +1,25 @@
-import test from 'ava'
-import { graphql } from 'graphql'
-import schemas from './helpers/schema'
-import context from './helpers/context'
+import test from 'ava';
+import GraphQL from 'graphql';
+import context from './helpers/context.js';
 
-const TEST_SCHEMA = process.env.TEST_SCHEMA || 'baseSchema'
-const schema = schemas[TEST_SCHEMA]
+const { graphql } = GraphQL;
 
 function testData(t, query, handler) {
-  return graphql(schema, query, null, context).then(result => {
+  return graphql(t.context.schema, query, null, context).then((result) => {
     if (result.errors !== undefined) {
-      result.errors.forEach(error => t.log(error))
+      result.errors.forEach((error) => t.log(error));
     }
-    t.is(result.errors, undefined)
-    return handler(t, result.data)
-  })
+    t.is(result.errors, undefined);
+    return handler(t, result.data);
+  });
 }
 
 function testError(t, query, handler) {
-  return graphql(schema, query, null, context).then(result => {
-    t.truthy(result.errors)
-    t.true(result.errors.length > 0)
-    return handler(t, result.errors)
-  })
+  return graphql(t.context.schema, query, null, context).then((result) => {
+    t.truthy(result.errors);
+    t.true(result.errors.length > 0);
+    return handler(t, result.errors);
+  });
 }
 
 test(
@@ -41,11 +39,11 @@ test(
     t.deepEqual(data, {
       node: {
         __typename: 'ReleaseGroup',
-        mbid: 'e37d2740-4503-4e3f-ab6d-e622a25e964d'
-      }
-    })
+        mbid: 'e37d2740-4503-4e3f-ab6d-e622a25e964d',
+      },
+    });
   }
-)
+);
 
 test(
   'schema has a lookup query',
@@ -67,12 +65,12 @@ test(
         artist: {
           mbid: 'c8da2e40-bd28-4d4e-813a-bd2f51958ba8',
           name: 'Lures',
-          type: 'Group'
-        }
-      }
-    })
+          type: 'Group',
+        },
+      },
+    });
   }
-)
+);
 
 test(
   'schema has a search query',
@@ -94,12 +92,12 @@ test(
   }
 `,
   (t, data) => {
-    const { recordings } = data.search
-    t.true(recordings.totalCount > 0)
-    t.true(recordings.edges.length === 25)
-    recordings.edges.forEach(edge => t.true(edge.score > 0))
+    const { recordings } = data.search;
+    t.true(recordings.totalCount > 0);
+    t.true(recordings.edges.length === 25);
+    recordings.edges.forEach((edge) => t.true(edge.score > 0));
   }
-)
+);
 
 test(
   'schema has a browse query',
@@ -127,12 +125,12 @@ test(
   }
 `,
   (t, data) => {
-    const { releaseGroups } = data.browse
-    t.true(releaseGroups.totalCount > 0)
-    t.true(releaseGroups.edges.length > 0)
-    releaseGroups.edges.forEach(edge => t.truthy(edge.node.title))
+    const { releaseGroups } = data.browse;
+    t.true(releaseGroups.totalCount > 0);
+    t.true(releaseGroups.edges.length > 0);
+    releaseGroups.edges.forEach((edge) => t.truthy(edge.node.title));
   }
-)
+);
 
 test(
   'supports deeply nested queries',
@@ -207,11 +205,11 @@ test(
   }
 `,
   (t, data) => {
-    const { labels } = data.search
-    t.true(labels.edges.length > 0)
-    t.is(labels.edges[0].node.releases.edges.length, 1)
+    const { labels } = data.search;
+    t.true(labels.edges.length > 0);
+    t.is(labels.edges[0].node.releases.edges.length, 1);
   }
-)
+);
 
 test(
   'connections have a nodes shortcut field',
@@ -276,11 +274,11 @@ test(
   }
 `,
   (t, data) => {
-    const { labels } = data.search
-    t.true(labels.nodes.length > 0)
-    t.is(labels.nodes[0].releases.nodes.length, 1)
+    const { labels } = data.search;
+    t.true(labels.nodes.length > 0);
+    t.is(labels.nodes[0].releases.nodes.length, 1);
   }
-)
+);
 
 test(
   'throws an error if given a malformed MBID',
@@ -295,9 +293,9 @@ test(
   }
 `,
   (t, errors) => {
-    t.regex(errors[0].message, /Malformed MBID: ABC123/)
+    t.regex(errors[0].message, /Malformed MBID: ABC123/);
   }
-)
+);
 
 test(
   'artist areas access begin_area/end_area for lookup queries',
@@ -317,11 +315,11 @@ test(
   }
 `,
   (t, data) => {
-    const { artist } = data.lookup
-    t.is(artist.beginArea.name, 'Westmount')
-    t.is(artist.endArea.name, 'Los Angeles')
+    const { artist } = data.lookup;
+    t.is(artist.beginArea.name, 'Westmount');
+    t.is(artist.endArea.name, 'Los Angeles');
   }
-)
+);
 
 test(
   'artist areas access begin_area/end_area for browse queries',
@@ -345,12 +343,12 @@ test(
   }
 `,
   (t, data) => {
-    const artists = data.browse.artists.edges.map(edge => edge.node)
-    t.true(artists.length > 1)
-    t.true(artists.some(artist => artist.beginArea))
-    t.true(artists.some(artist => artist.endArea))
+    const artists = data.browse.artists.edges.map((edge) => edge.node);
+    t.true(artists.length > 1);
+    t.true(artists.some((artist) => artist.beginArea));
+    t.true(artists.some((artist) => artist.endArea));
   }
-)
+);
 
 test(
   'artist areas access begin-area/end-area for search queries',
@@ -374,12 +372,12 @@ test(
   }
 `,
   (t, data) => {
-    const artists = data.search.artists.edges.map(edge => edge.node)
-    t.true(artists.length === 1)
-    t.is(artists[0].beginArea.name, 'Westmount')
-    t.is(artists[0].endArea.name, 'Los Angeles')
+    const artists = data.search.artists.edges.map((edge) => edge.node);
+    t.true(artists.length === 1);
+    t.is(artists[0].beginArea.name, 'Westmount');
+    t.is(artists[0].endArea.name, 'Los Angeles');
   }
-)
+);
 
 test(
   'relationships are grouped by target type',
@@ -425,24 +423,24 @@ test(
   }
 `,
   (t, data) => {
-    const { relationships } = data.lookup.artist
-    t.is(relationships.artists.edges.length, 5)
-    relationships.artists.edges.forEach(edge => {
-      t.is(edge.node.targetType, 'artist')
-      t.is(edge.node.target.__typename, 'Artist')
-    })
-    t.is(relationships.recordings.edges.length, 5)
-    relationships.recordings.edges.forEach(edge => {
-      t.is(edge.node.targetType, 'recording')
-      t.is(edge.node.target.__typename, 'Recording')
-    })
-    t.is(relationships.releases.edges.length, 5)
-    relationships.releases.edges.forEach(edge => {
-      t.is(edge.node.targetType, 'release')
-      t.is(edge.node.target.__typename, 'Release')
-    })
+    const { relationships } = data.lookup.artist;
+    t.is(relationships.artists.edges.length, 5);
+    relationships.artists.edges.forEach((edge) => {
+      t.is(edge.node.targetType, 'artist');
+      t.is(edge.node.target.__typename, 'Artist');
+    });
+    t.is(relationships.recordings.edges.length, 5);
+    relationships.recordings.edges.forEach((edge) => {
+      t.is(edge.node.targetType, 'recording');
+      t.is(edge.node.target.__typename, 'Recording');
+    });
+    t.is(relationships.releases.edges.length, 5);
+    relationships.releases.edges.forEach((edge) => {
+      t.is(edge.node.targetType, 'release');
+      t.is(edge.node.target.__typename, 'Release');
+    });
   }
-)
+);
 
 test(
   'relationships can be filtered by type',
@@ -466,15 +464,15 @@ test(
   }
 `,
   (t, data) => {
-    const { artist } = data.lookup
-    const rels = artist.relationships.artists.edges.map(edge => edge.node)
-    t.is(rels.length, 2)
-    rels.forEach(rel => {
-      t.is(rel.targetType, 'artist')
-      t.is(rel.type, 'parent')
-    })
+    const { artist } = data.lookup;
+    const rels = artist.relationships.artists.edges.map((edge) => edge.node);
+    t.is(rels.length, 2);
+    rels.forEach((rel) => {
+      t.is(rel.targetType, 'artist');
+      t.is(rel.type, 'parent');
+    });
   }
-)
+);
 
 test(
   'relationships can be filtered by type ID',
@@ -498,15 +496,15 @@ test(
   }
 `,
   (t, data) => {
-    const { artist } = data.lookup
-    const rels = artist.relationships.artists.edges.map(edge => edge.node)
-    t.is(rels.length, 1)
-    rels.forEach(rel => {
-      t.is(rel.targetType, 'artist')
-      t.is(rel.type, 'involved with')
-    })
+    const { artist } = data.lookup;
+    const rels = artist.relationships.artists.edges.map((edge) => edge.node);
+    t.is(rels.length, 1);
+    rels.forEach((rel) => {
+      t.is(rel.targetType, 'artist');
+      t.is(rel.type, 'involved with');
+    });
   }
-)
+);
 
 test(
   'relationships can be filtered by direction',
@@ -538,21 +536,21 @@ test(
   }
 `,
   (t, data) => {
-    const { area } = data.lookup
-    const isPartOf = area.relationships.isPartOf.edges.map(edge => edge.node)
-    const hasParts = area.relationships.hasParts.edges.map(edge => edge.node)
-    t.true(isPartOf.length > 0)
-    t.true(hasParts.length > 0)
-    isPartOf.forEach(rel => {
-      t.is(rel.type, 'part of')
-      t.is(rel.direction, 'backward')
-    })
-    hasParts.forEach(rel => {
-      t.is(rel.type, 'part of')
-      t.is(rel.direction, 'forward')
-    })
+    const { area } = data.lookup;
+    const isPartOf = area.relationships.isPartOf.edges.map((edge) => edge.node);
+    const hasParts = area.relationships.hasParts.edges.map((edge) => edge.node);
+    t.true(isPartOf.length > 0);
+    t.true(hasParts.length > 0);
+    isPartOf.forEach((rel) => {
+      t.is(rel.type, 'part of');
+      t.is(rel.direction, 'backward');
+    });
+    hasParts.forEach((rel) => {
+      t.is(rel.type, 'part of');
+      t.is(rel.direction, 'forward');
+    });
   }
-)
+);
 
 test(
   'area maps iso-3166-1-codes to isoCodes',
@@ -568,9 +566,9 @@ test(
   }
 `,
   (t, data) => {
-    t.deepEqual(data.lookup.area.isoCodes, ['US'])
+    t.deepEqual(data.lookup.area.isoCodes, ['US']);
   }
-)
+);
 
 test(
   'area isoCodes accepts an argument to retrieve 3166-1, 3166-2, or 3166-3 codes',
@@ -596,17 +594,17 @@ test(
   }
 `,
   (t, data) => {
-    t.deepEqual(data.lookup.eastGermany.isoDefault, ['XG'])
-    t.deepEqual(data.lookup.eastGermany.iso3166_1, ['XG'])
-    t.is(data.lookup.eastGermany.iso3166_2, null)
-    t.deepEqual(data.lookup.eastGermany.iso3166_3, ['DDDE'])
+    t.deepEqual(data.lookup.eastGermany.isoDefault, ['XG']);
+    t.deepEqual(data.lookup.eastGermany.iso3166_1, ['XG']);
+    t.is(data.lookup.eastGermany.iso3166_2, null);
+    t.deepEqual(data.lookup.eastGermany.iso3166_3, ['DDDE']);
 
-    t.is(data.lookup.newYork.isoDefault, null)
-    t.is(data.lookup.newYork.iso3166_1, null)
-    t.deepEqual(data.lookup.newYork.iso3166_2, ['US-NY'])
-    t.is(data.lookup.newYork.iso3166_3, null)
+    t.is(data.lookup.newYork.isoDefault, null);
+    t.is(data.lookup.newYork.iso3166_1, null);
+    t.deepEqual(data.lookup.newYork.iso3166_2, ['US-NY']);
+    t.is(data.lookup.newYork.iso3166_3, null);
   }
-)
+);
 
 test(
   'areas have a type and typeID',
@@ -625,9 +623,9 @@ test(
   }
 `,
   (t, data) => {
-    t.snapshot(data)
+    t.snapshot(data);
   }
-)
+);
 
 test(
   'alias locales use the locale scalar',
@@ -645,11 +643,15 @@ test(
   }
 `,
   (t, data) => {
-    const { aliases } = data.lookup.artist
-    t.is(aliases.find(alias => alias.locale === 'en').name, 'PSY')
-    t.is(aliases.find(alias => alias.locale === 'ko').name, '싸이')
+    const { aliases } = data.lookup.artist;
+    t.true(
+      aliases.some((alias) => alias.locale === 'en' && alias.name === 'PSY')
+    );
+    t.true(
+      aliases.some((alias) => alias.locale === 'ko' && alias.name === '싸이')
+    );
   }
-)
+);
 
 test(
   'work ISWCs use the ISWC scalar',
@@ -665,11 +667,11 @@ test(
   }
 `,
   (t, data) => {
-    const { work } = data.lookup
-    t.is(work.title, 'The Partisan')
-    t.deepEqual(work.iswcs, ['T-900.755.682-3'])
+    const { work } = data.lookup;
+    t.is(work.title, 'The Partisan');
+    t.deepEqual(work.iswcs, ['T-900.755.682-3']);
   }
-)
+);
 
 test(
   'URLs may be looked up by resource',
@@ -685,11 +687,11 @@ test(
   }
 `,
   (t, data) => {
-    const { url } = data.lookup
-    t.is(url.mbid, '4347ffe2-82ec-4059-9520-6a1a3f73a304')
-    t.is(url.resource, 'http://www.nirvana.com/')
+    const { url } = data.lookup;
+    t.is(url.mbid, '4347ffe2-82ec-4059-9520-6a1a3f73a304');
+    t.is(url.resource, 'http://www.nirvana.com/');
   }
-)
+);
 
 test(
   'throws an error if given a malformed resource URL',
@@ -705,9 +707,9 @@ test(
   }
 `,
   (t, errors) => {
-    t.regex(errors[0].message, /Malformed URL: http:foo/)
+    t.regex(errors[0].message, /Malformed URL: http:foo/);
   }
-)
+);
 
 test(
   'release groups can be browsed by type',
@@ -726,11 +728,15 @@ test(
   }
 `,
   (t, data) => {
-    const releaseGroups = data.browse.releaseGroups.edges.map(edge => edge.node)
-    t.is(releaseGroups.length, 8)
-    releaseGroups.forEach(releaseGroup => t.is(releaseGroup.primaryType, 'EP'))
+    const releaseGroups = data.browse.releaseGroups.edges.map(
+      (edge) => edge.node
+    );
+    t.is(releaseGroups.length, 8);
+    releaseGroups.forEach((releaseGroup) =>
+      t.is(releaseGroup.primaryType, 'EP')
+    );
   }
-)
+);
 
 test(
   'releases can be browsed by type and status',
@@ -749,11 +755,11 @@ test(
   }
 `,
   (t, data) => {
-    const releases = data.browse.releases.edges.map(edge => edge.node)
-    t.is(releases.length, 6)
-    releases.forEach(release => t.is(release.status, 'BOOTLEG'))
+    const releases = data.browse.releases.edges.map((edge) => edge.node);
+    t.is(releases.length, 6);
+    releases.forEach((release) => t.is(release.status, 'BOOTLEG'));
   }
-)
+);
 
 test(
   'releases have an ASIN field',
@@ -768,10 +774,10 @@ test(
   }
 `,
   (t, data) => {
-    const { release } = data.lookup
-    t.is(release.asin, 'B01KN6XDS6')
+    const { release } = data.lookup;
+    t.is(release.asin, 'B01KN6XDS6');
   }
-)
+);
 
 test(
   'artists have a list of ISNIs and IPIs',
@@ -787,11 +793,11 @@ test(
   }
 `,
   (t, data) => {
-    const { artist } = data.lookup
-    t.deepEqual(artist.ipis, ['00006457004'])
-    t.deepEqual(artist.isnis, ['0000000110273481'])
+    const { artist } = data.lookup;
+    t.deepEqual(artist.ipis, ['00006457004']);
+    t.deepEqual(artist.isnis, ['0000000110273481']);
   }
-)
+);
 
 test(
   'artistCredits is an alias for artistCredit',
@@ -833,24 +839,42 @@ test(
   }
 `,
   (t, data) => {
-    const { recording, release, releaseGroup } = data.lookup
+    const { recording, release, releaseGroup } = data.lookup;
     t.deepEqual(recording.artistCredit, [
-      { name: 'Holly Golightly & The Brokeoffs', joinPhrase: '' }
-    ])
-    t.deepEqual(recording.artistCredits, recording.artistCredit)
+      { name: 'Holly Golightly & The Brokeoffs', joinPhrase: '' },
+    ]);
+    t.deepEqual(recording.artistCredits, recording.artistCredit);
 
     t.deepEqual(release.artistCredit, [
-      { name: 'Leonard Cohen', joinPhrase: '' }
-    ])
-    t.deepEqual(release.artistCredits, release.artistCredit)
+      { name: 'Leonard Cohen', joinPhrase: '' },
+    ]);
+    t.deepEqual(release.artistCredits, release.artistCredit);
 
     t.deepEqual(releaseGroup.artistCredit, [
       { name: 'DJ Muggs', joinPhrase: ' vs. ' },
-      { name: 'Ill Bill', joinPhrase: '' }
-    ])
-    t.deepEqual(releaseGroup.artistCredits, releaseGroup.artistCredit)
+      { name: 'Ill Bill', joinPhrase: '' },
+    ]);
+    t.deepEqual(releaseGroup.artistCredits, releaseGroup.artistCredit);
   }
-)
+);
+
+test(
+  'recordings have a list of ISRCs',
+  testData,
+  `
+  {
+    lookup {
+      recording(mbid: "9f9cf187-d6f9-437f-9d98-d59cdbd52757") {
+        isrcs
+      }
+    }
+  }
+  `,
+  (t, data) => {
+    t.true(data.lookup.recording.isrcs.includes('GBAYE9701376'));
+    t.true(data.lookup.recording.isrcs.includes('GBBKS1700108'));
+  }
+);
 
 test(
   'recordings can be browsed by ISRC',
@@ -871,13 +895,13 @@ test(
   }
 `,
   (t, data) => {
-    const recordings = data.browse.recordings.edges.map(edge => edge.node)
-    t.is(data.browse.recordings.totalCount, 1)
-    t.deepEqual(recordings, [
-      { title: 'About a Girl', isrcs: ['USSUB0200002', 'USUG10200084'] }
-    ])
+    const recordings = data.browse.recordings.edges.map((edge) => edge.node);
+    t.true(data.browse.recordings.totalCount >= 1);
+    t.true(
+      recordings.every((recording) => recording.isrcs.includes('USSUB0200002'))
+    );
   }
-)
+);
 
 test(
   'releases can be browsed by Disc ID',
@@ -898,20 +922,20 @@ test(
   }
 `,
   (t, data) => {
-    const releases = data.browse.releases.edges.map(edge => edge.node)
-    t.true(data.browse.releases.totalCount >= 2)
+    const releases = data.browse.releases.edges.map((edge) => edge.node);
+    t.true(data.browse.releases.totalCount >= 2);
     t.true(
       releases.some(
-        release => release.mbid === '5a6e5ad7-c2bd-3484-a20e-121bf981c883'
+        (release) => release.mbid === '5a6e5ad7-c2bd-3484-a20e-121bf981c883'
       )
-    )
+    );
     t.true(
       releases.some(
-        release => release.mbid === '96f6f90e-d831-4f37-bf72-ce2982e459fb'
+        (release) => release.mbid === '96f6f90e-d831-4f37-bf72-ce2982e459fb'
       )
-    )
+    );
   }
-)
+);
 
 test(
   'works can be browsed by ISWC',
@@ -932,11 +956,11 @@ test(
   }
 `,
   (t, data) => {
-    const works = data.browse.works.edges.map(edge => edge.node)
-    t.is(data.browse.works.totalCount, 1)
-    t.deepEqual(works, [{ title: 'The Partisan', iswcs: ['T-900.755.682-3'] }])
+    const works = data.browse.works.edges.map((edge) => edge.node);
+    t.is(data.browse.works.totalCount, 1);
+    t.deepEqual(works, [{ title: 'The Partisan', iswcs: ['T-900.755.682-3'] }]);
   }
-)
+);
 
 test(
   'recordings have a length in milliseconds',
@@ -951,10 +975,10 @@ test(
   }
 `,
   (t, data) => {
-    const { recording } = data.lookup
-    t.is(recording.length, 383493)
+    const { recording } = data.lookup;
+    t.is(recording.length, 383813);
   }
-)
+);
 
 test(
   'collections can be browsed by the entities they contain',
@@ -986,20 +1010,20 @@ test(
   }
 `,
   (t, data) => {
-    const collections = data.browse.collections.edges.map(edge => edge.node)
-    t.true(collections.length >= 2)
-    t.true(collections.some(collection => collection.editor === 'arist.on'))
+    const collections = data.browse.collections.edges.map((edge) => edge.node);
+    t.true(collections.length >= 2);
+    t.true(collections.some((collection) => collection.editor === 'arist.on'));
     t.true(
-      collections.some(collection => collection.editor === 'ListMyCDs.com')
-    )
-    collections.forEach(collection => {
-      t.is(collection.entityType, 'artist')
-      t.is(collection.type, 'Artist')
-      t.true(collection.artists.totalCount > 0)
-      t.true(collection.artists.edges.length > 0)
-    })
+      collections.some((collection) => collection.editor === 'ListMyCDs.com')
+    );
+    collections.forEach((collection) => {
+      t.is(collection.entityType, 'artist');
+      t.is(collection.type, 'Artist');
+      t.true(collection.artists.totalCount > 0);
+      t.true(collection.artists.edges.length > 0);
+    });
   }
-)
+);
 
 test(
   'collections can be looked up by MBID',
@@ -1021,11 +1045,11 @@ test(
   }
 `,
   (t, data) => {
-    const { collection } = data.lookup
-    t.is(collection.name, 'Beets Music Collection')
-    t.is(collection.releases.edges.length, 25)
+    const { collection } = data.lookup;
+    t.is(collection.name, 'Beets Music Collection');
+    t.is(collection.releases.edges.length, 25);
   }
-)
+);
 
 test(
   'entities have a collections field',
@@ -1059,12 +1083,12 @@ test(
   }
 `,
   (t, data) => {
-    const { release, artist } = data.lookup
-    t.true(release.collections.totalCount > 0)
-    t.true(release.collections.edges.length > 0)
-    t.true(artist.collections.edges.length > 0)
+    const { release, artist } = data.lookup;
+    t.true(release.collections.totalCount > 0);
+    t.true(release.collections.edges.length > 0);
+    t.true(artist.collections.edges.length > 0);
   }
-)
+);
 
 test(
   'releases support a list of media',
@@ -1085,25 +1109,25 @@ test(
   }
 `,
   (t, data) => {
-    const { release } = data.lookup
+    const { release } = data.lookup;
     t.deepEqual(release.media, [
       {
         title: 'Left',
         format: 'CD',
         formatID: '9712d52a-4509-3d4b-a1a2-67c88c643e31',
         position: 1,
-        trackCount: 12
+        trackCount: 12,
       },
       {
         title: 'Right',
         format: 'CD',
         formatID: '9712d52a-4509-3d4b-a1a2-67c88c643e31',
         position: 2,
-        trackCount: 11
-      }
-    ])
+        trackCount: 11,
+      },
+    ]);
   }
-)
+);
 
 test(
   'throws an error if looking up a URL without an argument',
@@ -1121,9 +1145,9 @@ test(
     t.is(
       errors[0].message,
       'Lookups by a field other than MBID must provide: resource'
-    )
+    );
   }
-)
+);
 
 test(
   'some entities support ratings',
@@ -1191,27 +1215,29 @@ test(
   }
 `,
   (t, data) => {
-    const { event, work } = data.lookup
-    const artists = data.browse.artists.edges.map(edge => edge.node)
-    const recordings = data.browse.recordings.edges.map(edge => edge.node)
-    const labels = data.search.labels.edges.map(edge => edge.node)
-    const releaseGroups = data.search.releaseGroups.edges.map(edge => edge.node)
-    t.is(event.rating.voteCount, 0)
-    t.is(event.rating.value, null)
-    t.true(work.rating.voteCount > 0)
-    t.true(work.rating.value >= 4)
-    t.true(artists.some(artist => artist.rating.voteCount > 0))
-    t.true(artists.some(artist => artist.rating.value > 3))
-    t.true(recordings.some(recording => recording.rating.voteCount > 0))
-    t.true(recordings.some(recording => recording.rating.value > 3))
-    t.true(labels.some(label => label.rating.voteCount > 0))
-    t.true(labels.some(label => label.rating.value > 3))
+    const { event, work } = data.lookup;
+    const artists = data.browse.artists.edges.map((edge) => edge.node);
+    const recordings = data.browse.recordings.edges.map((edge) => edge.node);
+    const labels = data.search.labels.edges.map((edge) => edge.node);
+    const releaseGroups = data.search.releaseGroups.edges.map(
+      (edge) => edge.node
+    );
+    t.is(event.rating.voteCount, 0);
+    t.is(event.rating.value, null);
+    t.true(work.rating.voteCount > 0);
+    t.true(work.rating.value >= 4);
+    t.true(artists.some((artist) => artist.rating.voteCount > 0));
+    t.true(artists.some((artist) => artist.rating.value > 3));
+    t.true(recordings.some((recording) => recording.rating.voteCount > 0));
+    t.true(recordings.some((recording) => recording.rating.value > 3));
+    t.true(labels.some((label) => label.rating.voteCount > 0));
+    t.true(labels.some((label) => label.rating.value > 3));
     t.true(
-      releaseGroups.some(releaseGroup => releaseGroup.rating.voteCount > 0)
-    )
-    t.true(releaseGroups.some(releaseGroup => releaseGroup.rating.value > 3))
+      releaseGroups.some((releaseGroup) => releaseGroup.rating.voteCount > 0)
+    );
+    t.true(releaseGroups.some((releaseGroup) => releaseGroup.rating.value > 3));
   }
-)
+);
 
 test(
   'discs can be looked up by disc ID',
@@ -1238,10 +1264,10 @@ test(
   }
 `,
   (t, data) => {
-    const { disc } = data.lookup
-    t.is(disc.discID, 'TMXdzZkTcc9Jq24PD0w5J9_AXms-')
-    t.is(disc.offsetCount, 9)
-    t.is(disc.sectors, 193443)
+    const { disc } = data.lookup;
+    t.is(disc.discID, 'TMXdzZkTcc9Jq24PD0w5J9_AXms-');
+    t.is(disc.offsetCount, 9);
+    t.is(disc.sectors, 193443);
     t.deepEqual(disc.offsets, [
       150,
       18190,
@@ -1251,16 +1277,16 @@ test(
       116853,
       151413,
       166833,
-      184123
-    ])
-    t.is(disc.releases.totalCount, 1)
-    t.is(disc.releases.edges.length, 1)
+      184123,
+    ]);
+    t.is(disc.releases.totalCount, 1);
+    t.is(disc.releases.edges.length, 1);
     t.is(
       disc.releases.edges[0].node.mbid,
       '7f6d3088-837d-495e-905f-be5c70ac2d82'
-    )
+    );
   }
-)
+);
 
 test(
   'release media has a list of discs',
@@ -1287,14 +1313,14 @@ test(
   }
 `,
   (t, data) => {
-    const { release } = data.lookup
-    t.is(release.media.length, 1)
-    t.is(release.media[0].discs.length, 2)
+    const { release } = data.lookup;
+    t.is(release.media.length, 1);
+    t.is(release.media[0].discs.length, 2);
   }
-)
+);
 
 // FIXME: API seems to have changed, potentially a bug in MusicBrainz.
-test.skip(
+test(
   'disc queries can be deeply nested',
   testData,
   `
@@ -1344,25 +1370,25 @@ test.skip(
   }
 `,
   (t, data) => {
-    const { disc } = data.lookup
-    t.true(disc.releases.edges.length > 0)
-    disc.releases.edges.forEach(release => {
-      t.true(release.node.media.length > 0)
-      release.node.media.forEach(medium => {
-        t.true(medium.discs.length > 0)
-        medium.discs.forEach(disc => {
-          t.true(disc.releases.edges.length > 0)
-          disc.releases.edges.forEach(release => {
-            t.true(release.node.media.length > 0)
-            release.node.media.forEach(medium => {
-              t.true(medium.discs.length > 0)
-            })
-          })
-        })
-      })
-    })
+    const { disc } = data.lookup;
+    t.true(disc.releases.edges.length > 0);
+    disc.releases.edges.forEach((release) => {
+      t.true(release.node.media.length > 0);
+      release.node.media.forEach((medium) => {
+        t.true(medium.discs.length > 0);
+        medium.discs.forEach((disc) => {
+          t.true(disc.releases.edges.length > 0);
+          disc.releases.edges.forEach((release) => {
+            t.true(release.node.media.length > 0);
+            release.node.media.forEach((medium) => {
+              t.true(medium.discs.length > 0);
+            });
+          });
+        });
+      });
+    });
   }
-)
+);
 
 test(
   'entities support tags',
@@ -1400,14 +1426,16 @@ test(
   }
 `,
   (t, data) => {
-    const { label } = data.lookup
-    const artists = data.search.artists.edges.map(edge => edge.node)
-    t.true(label.tags.edges.some(edge => edge.node.name === 'indie folk'))
-    t.true(label.tags.edges.some(edge => edge.node.count > 0))
-    t.true(artists[0].tags.edges.some(edge => edge.node.name === 'blues rock'))
-    t.true(artists[0].tags.edges.some(edge => edge.node.count > 0))
+    const { label } = data.lookup;
+    const artists = data.search.artists.edges.map((edge) => edge.node);
+    t.true(label.tags.edges.some((edge) => edge.node.name === 'indie folk'));
+    t.true(label.tags.edges.some((edge) => edge.node.count > 0));
+    t.true(
+      artists[0].tags.edges.some((edge) => edge.node.name === 'blues rock')
+    );
+    t.true(artists[0].tags.edges.some((edge) => edge.node.count > 0));
   }
-)
+);
 
 test(
   'releases can include tracks',
@@ -1437,11 +1465,11 @@ test(
   }
 `,
   (t, data) => {
-    t.true(data.lookup.release.media.every(media => media.tracks.length > 0))
+    t.true(data.lookup.release.media.every((media) => media.tracks.length > 0));
     t.true(
-      data.lookup.release.media.every(media =>
-        media.tracks.every(track => track.recording)
+      data.lookup.release.media.every((media) =>
+        media.tracks.every((track) => track.recording)
       )
-    )
+    );
   }
-)
+);

test/api/client.js

@@ -1,12 +1,14 @@
-import test from 'ava'
-import Client from '../../src/api/client'
+import test from 'ava';
+import Client from '../../src/api/client.js';
 
-test('parseErrorMessage() returns the body or status code', t => {
-  const client = new Client()
-  t.is(
-    client.parseErrorMessage({ statusCode: 500 }, 'something went wrong'),
-    'something went wrong'
-  )
-  t.is(client.parseErrorMessage({ statusCode: 500 }, ''), '500')
-  t.is(client.parseErrorMessage({ statusCode: 404 }, {}), '404')
-})
+test('parseErrorMessage() returns the input error by default', (t) => {
+  const client = new Client();
+  const error = {
+    name: 'HTTPError',
+    response: {
+      statusCode: 500,
+      body: 'something went wrong',
+    },
+  };
+  t.is(client.parseErrorMessage(error), error);
+});

test/api/fixtures/musicbrainz.js.nock

@@ -0,0 +1,116 @@
+[
+  [
+    "getBrowseURL() generates a browse URL",
+    [
+    ]
+  ],
+  [
+    "getLookupURL() generates a lookup URL",
+    [
+    ]
+  ],
+  [
+    "getSearchURL() generates a search URL",
+    [
+    ]
+  ],
+  [
+    "lookup() sends a lookup query",
+    [
+      {
+        "body": "",
+        "method": "GET",
+        "path": "/ws/2/artist/c8da2e40-bd28-4d4e-813a-bd2f51958ba8?fmt=json",
+        "rawHeaders": [
+          "Date",
+          "Thu, 15 Apr 2021 09:07:10 GMT",
+          "Content-Type",
+          "application/json; charset=utf-8",
+          "Transfer-Encoding",
+          "chunked",
+          "Connection",
+          "close",
+          "Vary",
+          "Accept-Encoding",
+          "X-RateLimit-Limit",
+          "1200",
+          "X-RateLimit-Remaining",
+          "783",
+          "X-RateLimit-Reset",
+          "1618477631",
+          "Server",
+          "Plack::Handler::Starlet",
+          "ETag",
+          "W/\"80f1f0e96231d62805a0ac7d54414c6f\"",
+          "Access-Control-Allow-Origin",
+          "*",
+          "X-Cache-Status",
+          "STALE"
+        ],
+        "reqheaders": {
+          "accept": "application/json",
+          "accept-encoding": "gzip, deflate, br",
+          "host": "musicbrainz.org"
+        },
+        "response": "{\"life-span\":{\"end\":null,\"ended\":false,\"begin\":\"2013\"},\"id\":\"c8da2e40-bd28-4d4e-813a-bd2f51958ba8\",\"type-id\":\"e431f5f6-b5d2-343d-8b36-72607fffb74b\",\"begin_area\":{\"type-id\":null,\"id\":\"10adc6b5-63bf-4b4e-993e-ed83b05c22fc\",\"sort-name\":\"Seattle\",\"name\":\"Seattle\",\"type\":null,\"disambiguation\":\"\"},\"country\":null,\"gender-id\":null,\"disambiguation\":\"Seattle trio\",\"isnis\":[],\"gender\":null,\"sort-name\":\"Lures\",\"name\":\"Lures\",\"end-area\":null,\"begin-area\":{\"type-id\":null,\"id\":\"10adc6b5-63bf-4b4e-993e-ed83b05c22fc\",\"sort-name\":\"Seattle\",\"name\":\"Seattle\",\"type\":null,\"disambiguation\":\"\"},\"end_area\":null,\"ipis\":[],\"type\":\"Group\",\"area\":{\"disambiguation\":\"\",\"type\":null,\"type-id\":null,\"id\":\"10adc6b5-63bf-4b4e-993e-ed83b05c22fc\",\"name\":\"Seattle\",\"sort-name\":\"Seattle\"}}",
+        "responseIsBinary": false,
+        "scope": "http://musicbrainz.org:80",
+        "status": 200
+      }
+    ]
+  ],
+  [
+    "rejects non-MusicBrainz errors",
+    [
+    ]
+  ],
+  [
+    "rejects the promise when the API returns an error",
+    [
+      {
+        "body": "",
+        "method": "GET",
+        "path": "/ws/2/artist/5b11f4ce-a62d-471e-81fc-a69a8278c7da?inc=foobar&fmt=json",
+        "rawHeaders": [
+          "Date",
+          "Thu, 15 Apr 2021 09:07:10 GMT",
+          "Content-Type",
+          "application/json; charset=utf-8",
+          "Content-Length",
+          "144",
+          "Connection",
+          "close",
+          "X-RateLimit-Limit",
+          "1200",
+          "X-RateLimit-Remaining",
+          "664",
+          "X-RateLimit-Reset",
+          "1618477631",
+          "Server",
+          "Plack::Handler::Starlet",
+          "ETag",
+          "\"294308a5f1930ea2b39414c0b8ec853c\"",
+          "Access-Control-Allow-Origin",
+          "*"
+        ],
+        "reqheaders": {
+          "accept": "application/json",
+          "accept-encoding": "gzip, deflate, br",
+          "host": "musicbrainz.org"
+        },
+        "response": {
+          "error": "foobar is not a valid inc parameter for the artist resource.",
+          "help": "For usage, please see: https://musicbrainz.org/development/mmd"
+        },
+        "responseIsBinary": false,
+        "scope": "http://musicbrainz.org:80",
+        "status": 400
+      }
+    ]
+  ],
+  [
+    "uses the default error impementation if there is no JSON error",
+    [
+    ]
+  ]
+]

test/api/musicbrainz.js

@@ -1,84 +1,87 @@
-import test from 'ava'
-import MusicBrainz, { MusicBrainzError } from '../../src/api'
-import client from '../helpers/client/musicbrainz'
+import test from 'ava';
+import MusicBrainz from '../../src/api/index.js';
+import client from '../helpers/client/musicbrainz.js';
 
-test('getLookupURL() generates a lookup URL', t => {
+test('getLookupURL() generates a lookup URL', (t) => {
   t.is(
     client.getLookupURL('artist', 'c8da2e40-bd28-4d4e-813a-bd2f51958ba8', {
-      inc: ['recordings', 'release-groups']
+      inc: ['recordings', 'release-groups'],
     }),
     'artist/c8da2e40-bd28-4d4e-813a-bd2f51958ba8?inc=recordings%2Brelease-groups'
-  )
-})
+  );
+});
 
-test('getBrowseURL() generates a browse URL', t => {
+test('getBrowseURL() generates a browse URL', (t) => {
   t.is(
     client.getBrowseURL('recording', {
       artist: 'c8da2e40-bd28-4d4e-813a-bd2f51958ba8',
       limit: null,
-      offset: 0
+      offset: 0,
     }),
     'recording?artist=c8da2e40-bd28-4d4e-813a-bd2f51958ba8&offset=0'
-  )
-})
+  );
+});
 
-test('getSearchURL() generates a search URL', t => {
+test('getSearchURL() generates a search URL', (t) => {
   t.is(
     client.getSearchURL('artist', 'Lures', { inc: null }),
     'artist?query=Lures'
-  )
-})
+  );
+});
 
-test('lookup() sends a lookup query', t => {
-  return client
-    .lookup('artist', 'c8da2e40-bd28-4d4e-813a-bd2f51958ba8')
-    .then(response => {
-      t.is(response.id, 'c8da2e40-bd28-4d4e-813a-bd2f51958ba8')
-      t.is(response.type, 'Group')
-    })
-})
+test('lookup() sends a lookup query', async (t) => {
+  const response = await client.lookup(
+    'artist',
+    'c8da2e40-bd28-4d4e-813a-bd2f51958ba8'
+  );
 
-test('rejects the promise when the API returns an error', t => {
+  t.is(response.id, 'c8da2e40-bd28-4d4e-813a-bd2f51958ba8');
+  t.is(response.type, 'Group');
+});
+
+test('rejects the promise when the API returns an error', (t) => {
   const req = client.lookup('artist', '5b11f4ce-a62d-471e-81fc-a69a8278c7da', {
-    inc: ['foobar']
-  })
-  return t.throws(req, MusicBrainzError)
-})
+    inc: ['foobar'],
+  });
+  return t.throwsAsync(req, {
+    name: 'MusicBrainzError',
+    message: 'foobar is not a valid inc parameter for the artist resource.',
+  });
+});
 
-test('shouldRetry() retries only 5xx responses from MusicBrainz', t => {
-  t.true(client.shouldRetry(new MusicBrainzError('error', 500)))
-  t.true(client.shouldRetry(new MusicBrainzError('error', 501)))
-  t.true(client.shouldRetry(new MusicBrainzError('error', 598)))
-  t.true(client.shouldRetry(new MusicBrainzError('error', 599)))
-  t.false(client.shouldRetry(new MusicBrainzError('error', 404)))
-  t.false(client.shouldRetry(new MusicBrainzError('error', 499)))
-  t.false(client.shouldRetry(new MusicBrainzError('error', 600)))
-})
-
-test('shouldRetry() retries only transient local connection issues', t => {
-  t.true(client.shouldRetry({ code: 'ECONNRESET' }))
-  t.true(client.shouldRetry({ code: 'ENOTFOUND' }))
-  t.true(client.shouldRetry({ code: 'ESOCKETTIMEDOUT' }))
-  t.true(client.shouldRetry({ code: 'ETIMEDOUT' }))
-  t.true(client.shouldRetry({ code: 'ECONNREFUSED' }))
-  t.true(client.shouldRetry({ code: 'EHOSTUNREACH' }))
-  t.true(client.shouldRetry({ code: 'EPIPE' }))
-  t.true(client.shouldRetry({ code: 'EAI_AGAIN' }))
-  t.false(client.shouldRetry({ code: 'ENOENT' }))
-  t.false(client.shouldRetry({ code: 'EACCES' }))
-  t.false(client.shouldRetry({ code: 'EPERM' }))
-})
-
-test('rejects non-MusicBrainz errors', t => {
-  const client = new MusicBrainz({ baseURL: '$!@#$' })
-  return t.throws(
+test('rejects non-MusicBrainz errors', (t) => {
+  const client = new MusicBrainz({ baseURL: '$!@#$' });
+  return t.throwsAsync(
     client.get('artist/5b11f4ce-a62d-471e-81fc-a69a8278c7da'),
-    Error
-  )
-})
+    {
+      name: 'TypeError',
+    }
+  );
+});
 
-test('uses the default error impementation if there is no JSON error', t => {
-  t.is(client.parseErrorMessage({ statusCode: 501 }, 'yikes'), 'yikes')
-  t.is(client.parseErrorMessage({ statusCode: 500 }, {}), '500')
-  t.is(client.parseErrorMessage({ statusCode: 404 }, null), '404')
-})
+test('uses the default error impementation if there is no JSON error', (t) => {
+  let error = {
+    name: 'HTTPError',
+    response: {
+      statusCode: 501,
+      body: 'yikes',
+    },
+  };
+  t.is(client.parseErrorMessage(error), error);
+  error = {
+    name: 'HTTPError',
+    response: {
+      statusCode: 500,
+      body: {},
+    },
+  };
+  t.is(client.parseErrorMessage(error), error);
+  error = {
+    name: 'HTTPError',
+    response: {
+      statusCode: 404,
+      body: null,
+    },
+  };
+  t.is(client.parseErrorMessage(error), error);
+});

test/base-schema.js

@@ -1,2 +1,8 @@
-process.env.TEST_SCHEMA = 'baseSchema'
-require('./_schema')
+import test from 'ava';
+import { baseSchema } from '../src/schema.js';
+
+test.before((t) => {
+  t.context.schema = baseSchema;
+});
+
+import './_schema.js';

test/extended-schema.js

@@ -1,2 +1,13 @@
-process.env.TEST_SCHEMA = 'extendedSchema'
-require('./_schema')
+import test from 'ava';
+import { baseSchema, createSchema } from '../src/schema.js';
+import { defaultExtensions, loadExtension } from '../src/index.js';
+
+test.before(async (t) => {
+  const extensions = await Promise.all(
+    defaultExtensions.map((extension) => loadExtension(extension))
+  );
+  const schema = createSchema(baseSchema, { extensions });
+  t.context.schema = schema;
+});
+
+import './_schema.js';

test/extensions/cover-art-archive/client.js

@@ -1,58 +1,87 @@
-import test from 'ava'
-import client from '../../helpers/client/cover-art-archive'
+import test from 'ava';
+import client from '../../helpers/client/cover-art-archive.js';
 
-test('can retrieve a front image URL', t => {
-  return client
-    .imageURL('release', '76df3287-6cda-33eb-8e9a-044b5e15ffdd', 'front')
-    .then(url => {
-      t.is(
-        url,
-        'http://archive.org/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd-829521842.jpg'
-      )
-    })
-})
+test('can retrieve a front image URL', async (t) => {
+  const url = await client.imageURL(
+    'release',
+    '76df3287-6cda-33eb-8e9a-044b5e15ffdd',
+    'front'
+  );
 
-test('can retrieve a back image URL', t => {
-  return client
-    .imageURL('release', '76df3287-6cda-33eb-8e9a-044b5e15ffdd', 'back')
-    .then(url => {
-      t.is(
-        url,
-        'http://archive.org/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd-5769317885.jpg'
-      )
-    })
-})
+  t.is(
+    url,
+    'http://archive.org/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd-829521842.jpg'
+  );
+});
 
-test('can retrieve a list of release images', t => {
-  return client
-    .images('release', '76df3287-6cda-33eb-8e9a-044b5e15ffdd')
-    .then(data => {
-      t.is(
-        data.release,
-        'http://musicbrainz.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd'
-      )
-      t.true(data.images.length >= 3)
-      data.images.forEach(image => {
-        t.true(image.approved)
-        t.truthy(image.image)
-        t.truthy(image.id)
-        t.truthy(image.thumbnails.small)
-        t.truthy(image.thumbnails.large)
-      })
-      t.true(data.images.some(image => image.front))
-      t.true(data.images.some(image => image.back))
-      t.true(data.images.some(image => image.types.indexOf('Front') !== -1))
-      t.true(data.images.some(image => image.types.indexOf('Back') !== -1))
-      t.true(data.images.some(image => image.types.indexOf('Medium') !== -1))
-    })
-})
+test('can retrieve a back image URL', async (t) => {
+  const url = await client.imageURL(
+    'release',
+    '76df3287-6cda-33eb-8e9a-044b5e15ffdd',
+    'back'
+  );
 
-test('throws an error if given an invalid MBID', t => {
-  return t.throws(client.images('release', 'xyz'), client.errorClass)
-})
+  t.is(
+    url,
+    'http://archive.org/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd-5769317885.jpg'
+  );
+});
 
-test('uses the default error impementation if there is no HTML error', t => {
-  t.is(client.parseErrorMessage({ statusCode: 501 }, 'yikes'), 'yikes')
-  t.is(client.parseErrorMessage({ statusCode: 500 }, ''), '500')
-  t.is(client.parseErrorMessage({ statusCode: 404 }, null), '404')
-})
+test('can retrieve a list of release images', async (t) => {
+  const data = await client.images(
+    'release',
+    '76df3287-6cda-33eb-8e9a-044b5e15ffdd'
+  );
+
+  t.is(
+    data.release,
+    'https://musicbrainz.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd'
+  );
+  t.true(data.images.length >= 3);
+  data.images.forEach((image) => {
+    t.true(image.approved);
+    t.truthy(image.image);
+    t.truthy(image.id);
+    t.truthy(image.thumbnails.small);
+    t.truthy(image.thumbnails.large);
+  });
+  t.true(data.images.some((image) => image.front));
+  t.true(data.images.some((image) => image.back));
+  t.true(data.images.some((image) => image.types.indexOf('Front') !== -1));
+  t.true(data.images.some((image) => image.types.indexOf('Back') !== -1));
+  t.true(data.images.some((image) => image.types.indexOf('Medium') !== -1));
+});
+
+test('throws an error if given an invalid MBID', (t) => {
+  return t.throwsAsync(client.images('release', 'xyz'), {
+    name: 'CoverArtArchiveError',
+    message: 'Bad Request: invalid MBID specified',
+  });
+});
+
+test('uses the default error impementation if there is no HTML error', (t) => {
+  let error = {
+    name: 'HTTPError',
+    response: {
+      statusCode: 501,
+      body: 'yikes',
+    },
+  };
+  t.is(client.parseErrorMessage(error), error);
+  error = {
+    name: 'HTTPError',
+    response: {
+      statusCode: 500,
+      body: '',
+    },
+  };
+  t.is(client.parseErrorMessage(error), error);
+  error = {
+    name: 'HTTPError',
+    response: {
+      statusCode: 500,
+      body: null,
+    },
+  };
+  t.is(client.parseErrorMessage(error), error);
+});

test/extensions/cover-art-archive/fixtures/client.js.nock

@@ -0,0 +1,332 @@
+[
+  [
+    "can retrieve a back image URL",
+    [
+      {
+        "body": "",
+        "method": "HEAD",
+        "path": "/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/back",
+        "rawHeaders": [
+          "Date",
+          "Thu, 15 Apr 2021 09:07:12 GMT",
+          "Content-Type",
+          "text/plain; charset=utf-8",
+          "Content-Length",
+          "132",
+          "Connection",
+          "close",
+          "Location",
+          "http://archive.org/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd-5769317885.jpg",
+          "Access-Control-Allow-Origin",
+          "*"
+        ],
+        "reqheaders": {
+          "accept": "application/json",
+          "accept-encoding": "gzip, deflate, br",
+          "host": "coverartarchive.org"
+        },
+        "response": "",
+        "responseIsBinary": false,
+        "scope": "http://coverartarchive.org:80",
+        "status": 307
+      }
+    ]
+  ],
+  [
+    "can retrieve a front image URL",
+    [
+      {
+        "body": "",
+        "method": "HEAD",
+        "path": "/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/front",
+        "rawHeaders": [
+          "Date",
+          "Thu, 15 Apr 2021 09:07:12 GMT",
+          "Content-Type",
+          "text/plain; charset=utf-8",
+          "Content-Length",
+          "131",
+          "Connection",
+          "close",
+          "Location",
+          "http://archive.org/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd-829521842.jpg",
+          "Access-Control-Allow-Origin",
+          "*"
+        ],
+        "reqheaders": {
+          "accept": "application/json",
+          "accept-encoding": "gzip, deflate, br",
+          "host": "coverartarchive.org"
+        },
+        "response": "",
+        "responseIsBinary": false,
+        "scope": "http://coverartarchive.org:80",
+        "status": 307
+      }
+    ]
+  ],
+  [
+    "can retrieve a list of release images",
+    [
+      {
+        "body": "",
+        "method": "GET",
+        "path": "/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd",
+        "rawHeaders": [
+          "Date",
+          "Thu, 15 Apr 2021 09:07:12 GMT",
+          "Content-Type",
+          "text/plain; charset=utf-8",
+          "Content-Length",
+          "86",
+          "Connection",
+          "close",
+          "Location",
+          "http://archive.org/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/index.json",
+          "Access-Control-Allow-Origin",
+          "*"
+        ],
+        "reqheaders": {
+          "accept": "application/json",
+          "accept-encoding": "gzip, deflate, br",
+          "host": "coverartarchive.org"
+        },
+        "response": "See: http://archive.org/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/index.json\n",
+        "responseIsBinary": false,
+        "scope": "http://coverartarchive.org:80",
+        "status": 307
+      },
+      {
+        "body": "",
+        "method": "GET",
+        "path": "/download/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/index.json",
+        "rawHeaders": [
+          "Server",
+          "nginx/1.16.1 (Ubuntu)",
+          "Date",
+          "Thu, 15 Apr 2021 09:07:12 GMT",
+          "Content-Type",
+          "text/html; charset=UTF-8",
+          "Transfer-Encoding",
+          "chunked",
+          "Connection",
+          "close",
+          "Access-Control-Allow-Origin",
+          "*",
+          "Accept-Ranges",
+          "bytes",
+          "Location",
+          "http://ia802607.us.archive.org/32/items/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/index.json",
+          "Strict-Transport-Security",
+          "max-age=15724800",
+          "Referrer-Policy",
+          "no-referrer-when-downgrade"
+        ],
+        "reqheaders": {
+          "accept": "application/json",
+          "accept-encoding": "gzip, deflate, br",
+          "host": "archive.org"
+        },
+        "response": "",
+        "responseIsBinary": false,
+        "scope": "http://archive.org:80",
+        "status": 302
+      },
+      {
+        "body": "",
+        "method": "GET",
+        "path": "/32/items/mbid-76df3287-6cda-33eb-8e9a-044b5e15ffdd/index.json",
+        "rawHeaders": [
+          "Server",
+          "nginx/1.18.0 (Ubuntu)",
+          "Date",
+          "Thu, 15 Apr 2021 09:07:13 GMT",
+          "Content-Type",
+          "application/json",
+          "Content-Length",
+          "4445",
+          "Last-Modified",
+          "Tue, 12 Nov 2019 22:11:45 GMT",
+          "Connection",
+          "close",
+          "ETag",
+          "\"5dcb2e21-115d\"",
+          "Strict-Transport-Security",
+          "max-age=15724800",
+          "Expires",
+          "Thu, 15 Apr 2021 15:07:13 GMT",
+          "Cache-Control",
+          "max-age=21600",
+          "Access-Control-Allow-Origin",
+          "*",
+          "Accept-Ranges",
+          "bytes"
+        ],
+        "reqheaders": {
+          "accept": "application/json",
+          "accept-encoding": "gzip, deflate, br",
+          "host": "ia802607.us.archive.org"
+        },
+        "response": {
+          "images": [
+            {
+              "approved": true,
+              "back": false,
+              "comment": "",
+              "edit": 17462565,
+              "front": true,
+              "id": 829521842,
+              "image": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/829521842.jpg",
+              "thumbnails": {
+                "1200": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/829521842-1200.jpg",
+                "250": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/829521842-250.jpg",
+                "500": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/829521842-500.jpg",
+                "large": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/829521842-500.jpg",
+                "small": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/829521842-250.jpg"
+              },
+              "types": [
+                "Front"
+              ]
+            },
+            {
+              "approved": true,
+              "back": false,
+              "comment": "",
+              "edit": 65037291,
+              "front": false,
+              "id": 24546038908,
+              "image": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546038908.jpg",
+              "thumbnails": {
+                "1200": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546038908-1200.jpg",
+                "250": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546038908-250.jpg",
+                "500": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546038908-500.jpg",
+                "large": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546038908-500.jpg",
+                "small": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546038908-250.jpg"
+              },
+              "types": [
+                "Front",
+                "Booklet"
+              ]
+            },
+            {
+              "approved": true,
+              "back": false,
+              "comment": "",
+              "edit": 65037298,
+              "front": false,
+              "id": 24546039829,
+              "image": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546039829.jpg",
+              "thumbnails": {
+                "1200": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546039829-1200.jpg",
+                "250": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546039829-250.jpg",
+                "500": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546039829-500.jpg",
+                "large": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546039829-500.jpg",
+                "small": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546039829-250.jpg"
+              },
+              "types": [
+                "Booklet"
+              ]
+            },
+            {
+              "approved": true,
+              "back": false,
+              "comment": "",
+              "edit": 65037300,
+              "front": false,
+              "id": 24546040945,
+              "image": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546040945.jpg",
+              "thumbnails": {
+                "1200": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546040945-1200.jpg",
+                "250": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546040945-250.jpg",
+                "500": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546040945-500.jpg",
+                "large": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546040945-500.jpg",
+                "small": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/24546040945-250.jpg"
+              },
+              "types": [
+                "Booklet"
+              ]
+            },
+            {
+              "approved": true,
+              "back": true,
+              "comment": "",
+              "edit": 24923554,
+              "front": false,
+              "id": 5769317885,
+              "image": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769317885.jpg",
+              "thumbnails": {
+                "1200": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769317885-1200.jpg",
+                "250": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769317885-250.jpg",
+                "500": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769317885-500.jpg",
+                "large": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769317885-500.jpg",
+                "small": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769317885-250.jpg"
+              },
+              "types": [
+                "Back"
+              ]
+            },
+            {
+              "approved": true,
+              "back": false,
+              "comment": "",
+              "edit": 24923552,
+              "front": false,
+              "id": 5769316809,
+              "image": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769316809.jpg",
+              "thumbnails": {
+                "1200": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769316809-1200.jpg",
+                "250": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769316809-250.jpg",
+                "500": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769316809-500.jpg",
+                "large": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769316809-500.jpg",
+                "small": "http://coverartarchive.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd/5769316809-250.jpg"
+              },
+              "types": [
+                "Medium"
+              ]
+            }
+          ],
+          "release": "https://musicbrainz.org/release/76df3287-6cda-33eb-8e9a-044b5e15ffdd"
+        },
+        "responseIsBinary": false,
+        "scope": "http://ia802607.us.archive.org:80",
+        "status": 200
+      }
+    ]
+  ],
+  [
+    "throws an error if given an invalid MBID",
+    [
+      {
+        "body": "",
+        "method": "GET",
+        "path": "/release/xyz",
+        "rawHeaders": [
+          "Date",
+          "Thu, 15 Apr 2021 09:07:13 GMT",
+          "Content-Type",
+          "text/html",
+          "Content-Length",
+          "138",
+          "Connection",
+          "close",
+          "Access-Control-Allow-Origin",
+          "*"
+        ],
+        "reqheaders": {
+          "accept": "application/json",
+          "accept-encoding": "gzip, deflate, br",
+          "host": "coverartarchive.org"
+        },
+        "response": "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 3.2 Final//EN\">\n<title>400 Bad Request</title>\n<h1>Bad Request</h1>\n<p>invalid MBID specified</p>\n",
+        "responseIsBinary": false,
+        "scope": "http://coverartarchive.org:80",
+        "status": 400
+      }
+    ]
+  ],
+  [
+    "uses the default error impementation if there is no HTML error",
+    [
+    ]
+  ]
+]

test/extensions/cover-art-archive/schema.js

@@ -1,20 +1,27 @@
-import test from 'ava'
-import { graphql } from 'graphql'
-import extension from '../../../src/extensions/cover-art-archive'
-import baseSchema, { applyExtension } from '../../../src/schema'
-import baseContext from '../../helpers/context'
+import test from 'ava';
+import GraphQL from 'graphql';
+import extension from '../../../src/extensions/cover-art-archive/index.js';
+import { baseSchema, applyExtension } from '../../../src/schema.js';
+import baseContext from '../../helpers/context.js';
 
-const schema = applyExtension(extension, baseSchema)
-const context = extension.extendContext(baseContext)
+const { graphql } = GraphQL;
+
+const schema = applyExtension(extension, baseSchema);
+const context = extension.extendContext(baseContext, {
+  coverArtArchive: {
+    limit: Infinity,
+    period: 0,
+  },
+});
 
 function testData(t, query, handler) {
-  return graphql(schema, query, null, context).then(result => {
+  return graphql(schema, query, null, context).then((result) => {
     if (result.errors !== undefined) {
-      result.errors.forEach(error => t.log(error))
+      result.errors.forEach((error) => t.log(error));
     }
-    t.is(result.errors, undefined)
-    return handler(t, result.data)
-  })
+    t.is(result.errors, undefined);
+    return handler(t, result.data);
+  });
 }
 
 test(
@@ -33,11 +40,11 @@ test(
   }
 `,
   (t, data) => {
-    const { coverArtArchive } = data.lookup.release
-    t.true(coverArtArchive.artwork)
-    t.true(coverArtArchive.count >= 10)
+    const { coverArtArchive } = data.lookup.release;
+    t.true(coverArtArchive.artwork);
+    t.true(coverArtArchive.count >= 10);
   }
-)
+);
 
 test(
   'releases have a set of cover art images',
@@ -69,48 +76,50 @@ test(
   }
 `,
   (t, data) => {
-    const { coverArtArchive } = data.lookup.release
+    const { coverArtArchive } = data.lookup.release;
     t.is(
       coverArtArchive.front,
       'http://coverartarchive.org/release/b84ee12a-09ef-421b-82de-0441a926375b/1611507818.jpg'
-    )
+    );
     t.is(
       coverArtArchive.back,
       'http://coverartarchive.org/release/b84ee12a-09ef-421b-82de-0441a926375b/13536418798.jpg'
-    )
-    t.true(coverArtArchive.images.length >= 10)
-    t.true(coverArtArchive.images.some(image => image.front === true))
-    t.true(coverArtArchive.images.some(image => image.back === true))
+    );
+    t.true(coverArtArchive.images.length >= 10);
+    t.true(coverArtArchive.images.some((image) => image.front === true));
+    t.true(coverArtArchive.images.some((image) => image.back === true));
     t.true(
-      coverArtArchive.images.some(image => image.types.indexOf('Front') >= 0)
-    )
+      coverArtArchive.images.some((image) => image.types.indexOf('Front') >= 0)
+    );
     t.true(
-      coverArtArchive.images.some(image => image.types.indexOf('Back') >= 0)
-    )
+      coverArtArchive.images.some((image) => image.types.indexOf('Back') >= 0)
+    );
     t.true(
-      coverArtArchive.images.some(image => image.types.indexOf('Liner') >= 0)
-    )
+      coverArtArchive.images.some((image) => image.types.indexOf('Liner') >= 0)
+    );
     t.true(
-      coverArtArchive.images.some(image => image.types.indexOf('Poster') >= 0)
-    )
+      coverArtArchive.images.some((image) => image.types.indexOf('Poster') >= 0)
+    );
     t.true(
-      coverArtArchive.images.some(image => image.types.indexOf('Medium') >= 0)
-    )
-    t.true(coverArtArchive.images.some(image => image.edit === 18544122))
-    t.true(coverArtArchive.images.some(image => image.comment === ''))
-    t.true(coverArtArchive.images.some(image => image.fileID === '1611507818'))
+      coverArtArchive.images.some((image) => image.types.indexOf('Medium') >= 0)
+    );
+    t.true(coverArtArchive.images.some((image) => image.edit === 18544122));
+    t.true(coverArtArchive.images.some((image) => image.comment === ''));
+    t.true(
+      coverArtArchive.images.some((image) => image.fileID === '1611507818')
+    );
     t.true(
       coverArtArchive.images.some(
-        image =>
+        (image) =>
           image.image ===
           'http://coverartarchive.org/release/b84ee12a-09ef-421b-82de-0441a926375b/13536422691.jpg'
       )
-    )
-    t.true(coverArtArchive.images.every(image => image.approved === true))
-    t.true(coverArtArchive.images.every(image => image.thumbnails.small))
-    t.true(coverArtArchive.images.every(image => image.thumbnails.large))
+    );
+    t.true(coverArtArchive.images.every((image) => image.approved === true));
+    t.true(coverArtArchive.images.every((image) => image.thumbnails.small));
+    t.true(coverArtArchive.images.every((image) => image.thumbnails.large));
   }
-)
+);
 
 test(
   'can request a size for front and back cover art',
@@ -129,21 +138,21 @@ test(
   }
 `,
   (t, data) => {
-    const { coverArtArchive } = data.lookup.release
+    const { coverArtArchive } = data.lookup.release;
     t.is(
       coverArtArchive.front,
       'http://coverartarchive.org/release/b84ee12a-09ef-421b-82de-0441a926375b/1611507818-500.jpg'
-    )
+    );
     t.is(
       coverArtArchive.back,
       'http://coverartarchive.org/release/b84ee12a-09ef-421b-82de-0441a926375b/13536418798-250.jpg'
-    )
+    );
     t.is(
       coverArtArchive.fullFront,
       'http://coverartarchive.org/release/b84ee12a-09ef-421b-82de-0441a926375b/1611507818.jpg'
-    )
+    );
   }
-)
+);
 
 test(
   'release groups have a front cover art image',
@@ -169,16 +178,16 @@ test(
   }
 `,
   (t, data) => {
-    const { coverArtArchive } = data.lookup.releaseGroup
-    const { front } = coverArtArchive
-    t.true(coverArtArchive.artwork)
-    t.snapshot({ front })
-    t.is(coverArtArchive.release.mbid, '25fbfbb4-b1ee-4448-aadf-ae3bc2e2dd27')
-    t.is(coverArtArchive.release.title, 'The Dark Side of the Moon')
-    t.is(coverArtArchive.images.length, 1)
-    t.true(coverArtArchive.images[0].front)
+    const { coverArtArchive } = data.lookup.releaseGroup;
+    const { front } = coverArtArchive;
+    t.true(coverArtArchive.artwork);
+    t.snapshot({ front });
+    t.is(coverArtArchive.release.mbid, '6ef6e6cd-ad36-4c2f-816d-121bfb2f6774');
+    t.is(coverArtArchive.release.title, 'The Dark Side of the Moon');
+    t.is(coverArtArchive.images.length, 1);
+    t.true(coverArtArchive.images[0].front);
   }
-)
+);
 
 test(
   'release groups have different cover art sizes available',
@@ -196,11 +205,11 @@ test(
   }
 `,
   (t, data) => {
-    const { coverArtArchive } = data.lookup.releaseGroup
-    const { small, large } = coverArtArchive
-    t.snapshot({ small, large })
+    const { coverArtArchive } = data.lookup.releaseGroup;
+    const { small, large } = coverArtArchive;
+    t.snapshot({ small, large });
   }
-)
+);
 
 test(
   'can retrieve cover art in searches',
@@ -226,11 +235,15 @@ test(
   }
 `,
   (t, data) => {
-    const releases = data.search.releases.edges.map(edge => edge.node)
-    t.is(releases.length, 25)
-    t.true(releases.some(release => release.coverArtArchive.artwork === true))
-    t.true(releases.some(release => release.coverArtArchive.images.length > 0))
-    t.true(releases.some(release => release.coverArtArchive.front === null))
-    t.true(releases.some(release => release.coverArtArchive.back === null))
+    const releases = data.search.releases.edges.map((edge) => edge.node);
+    t.is(releases.length, 25);
+    t.true(
+      releases.some((release) => release.coverArtArchive.artwork === true)
+    );
+    t.true(
+      releases.some((release) => release.coverArtArchive.images.length > 0)
+    );
+    t.true(releases.some((release) => release.coverArtArchive.front === null));
+    t.true(releases.some((release) => release.coverArtArchive.back === null));
   }
-)
+);

test/extensions/cover-art-archive/snapshots/schema.js.md

@@ -2,14 +2,14 @@
 
 The actual snapshot is saved in `schema.js.snap`.
 
-Generated by [AVA](https://ava.li).
+Generated by [AVA](https://avajs.dev).
 
 ## release groups have a front cover art image
 
 > Snapshot 1
 
     {
-      front: 'http://coverartarchive.org/release/25fbfbb4-b1ee-4448-aadf-ae3bc2e2dd27/18974521469.jpg',
+      front: 'http://coverartarchive.org/release/6ef6e6cd-ad36-4c2f-816d-121bfb2f6774/12699438648.jpg',
     }
 
 ## release groups have different cover art sizes available
@@ -17,6 +17,6 @@ Generated by [AVA](https://ava.li).
 > Snapshot 1
 
     {
-      large: 'http://coverartarchive.org/release/25fbfbb4-b1ee-4448-aadf-ae3bc2e2dd27/18974521469-500.jpg',
-      small: 'http://coverartarchive.org/release/25fbfbb4-b1ee-4448-aadf-ae3bc2e2dd27/18974521469-250.jpg',
+      large: 'http://coverartarchive.org/release/6ef6e6cd-ad36-4c2f-816d-121bfb2f6774/12699438648-500.jpg',
+      small: 'http://coverartarchive.org/release/6ef6e6cd-ad36-4c2f-816d-121bfb2f6774/12699438648-250.jpg',
     }

test/extensions/fanart-tv/schema.js

@@ -1,20 +1,27 @@
-import test from 'ava'
-import { graphql } from 'graphql'
-import extension from '../../../src/extensions/fanart-tv'
-import baseSchema, { applyExtension } from '../../../src/schema'
-import baseContext from '../../helpers/context'
+import test from 'ava';
+import GraphQL from 'graphql';
+import extension from '../../../src/extensions/fanart-tv/index.js';
+import { baseSchema, applyExtension } from '../../../src/schema.js';
+import baseContext from '../../helpers/context.js';
 
-const schema = applyExtension(extension, baseSchema)
-const context = extension.extendContext(baseContext)
+const { graphql } = GraphQL;
+
+const schema = applyExtension(extension, baseSchema);
+const context = extension.extendContext(baseContext, {
+  fanArt: {
+    limit: Infinity,
+    period: 0,
+  },
+});
 
 function testData(t, query, handler) {
-  return graphql(schema, query, null, context).then(result => {
+  return graphql(schema, query, null, context).then((result) => {
     if (result.errors !== undefined) {
-      result.errors.forEach(error => t.log(error))
+      result.errors.forEach((error) => t.log(error));
     }
-    t.is(result.errors, undefined)
-    return handler(t, result.data)
-  })
+    t.is(result.errors, undefined);
+    return handler(t, result.data);
+  });
 }
 
 test(
@@ -61,19 +68,19 @@ test(
   }
 `,
   (t, data) => {
-    t.snapshot(data)
-    const { fanArt } = data.lookup.artist
+    t.snapshot(data);
+    const { fanArt } = data.lookup.artist;
     const allImages = []
       .concat(fanArt.backgrounds)
       .concat(fanArt.banners)
       .concat(fanArt.logos)
       .concat(fanArt.logosHD)
-      .concat(fanArt.thumbnails)
-    allImages.forEach(image => {
-      t.not(image.url, image.fullSizeURL)
-    })
+      .concat(fanArt.thumbnails);
+    allImages.forEach((image) => {
+      t.not(image.url, image.fullSizeURL);
+    });
   }
-)
+);
 
 test(
   'release groups have a fanArt field and preview images',
@@ -102,14 +109,14 @@ test(
   }
 `,
   (t, data) => {
-    t.snapshot(data)
-    const { fanArt } = data.lookup.releaseGroup
-    const allImages = [].concat(fanArt.albumCovers).concat(fanArt.discImages)
-    allImages.forEach(image => {
-      t.not(image.url, image.fullSizeURL)
-    })
+    t.snapshot(data);
+    const { fanArt } = data.lookup.releaseGroup;
+    const allImages = [].concat(fanArt.albumCovers).concat(fanArt.discImages);
+    allImages.forEach((image) => {
+      t.not(image.url, image.fullSizeURL);
+    });
   }
-)
+);
 
 test(
   'labels have a fanArt field and preview images',
@@ -132,10 +139,10 @@ test(
   }
 `,
   (t, data) => {
-    t.snapshot(data)
-    const { fanArt } = data.lookup.label
-    fanArt.logos.forEach(image => {
-      t.not(image.url, image.fullSizeURL)
-    })
+    t.snapshot(data);
+    const { fanArt } = data.lookup.label;
+    fanArt.logos.forEach((image) => {
+      t.not(image.url, image.fullSizeURL);
+    });
   }
-)
+);

test/extensions/fanart-tv/snapshots/schema.js.md

@@ -2,7 +2,7 @@
 
 The actual snapshot is saved in `schema.js.snap`.
 
-Generated by [AVA](https://ava.li).
+Generated by [AVA](https://avajs.dev).
 
 ## artists have a fanArt field and preview images
 
@@ -16,79 +16,79 @@ Generated by [AVA](https://ava.li).
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-4ddaf131354a8.jpg',
                 imageID: '2539',
-                likeCount: 9,
+                likeCount: 11,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-4ddaf131354a8.jpg',
               },
-              {
-                fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-524daf0607406.jpg',
-                imageID: '99990',
-                likeCount: 8,
-                url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-524daf0607406.jpg',
-              },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-52c91734c39dd.jpg',
                 imageID: '108996',
-                likeCount: 8,
+                likeCount: 10,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-52c91734c39dd.jpg',
               },
+              {
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-524daf0607406.jpg',
+                imageID: '99990',
+                likeCount: 9,
+                url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-524daf0607406.jpg',
+              },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-500187e32be79.jpg',
                 imageID: '42530',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-500187e32be79.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-4de90b913b2a1.jpg',
                 imageID: '4153',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-4de90b913b2a1.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-56d0287053099.jpg',
                 imageID: '190330',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-56d0287053099.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-56d02870536ef.jpg',
                 imageID: '190331',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-56d02870536ef.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-54dc843050470.jpg',
                 imageID: '151698',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-54dc843050470.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-524daf0607e44.jpg',
                 imageID: '99991',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-524daf0607e44.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-52c917ac71459.jpg',
                 imageID: '108997',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-52c917ac71459.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-55baa96c8c47f.jpg',
                 imageID: '172578',
-                likeCount: 3,
+                likeCount: 4,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-55baa96c8c47f.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-54dc845f81d1b.jpg',
                 imageID: '151699',
-                likeCount: 3,
+                likeCount: 4,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-54dc845f81d1b.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-54ac79e578054.jpg',
                 imageID: '146472',
-                likeCount: 1,
+                likeCount: 2,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistbackground/nirvana-54ac79e578054.jpg',
               },
             ],
@@ -96,13 +96,13 @@ Generated by [AVA](https://ava.li).
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/musicbanner/nirvana-591789a12da78.jpg',
                 imageID: '218845',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/musicbanner/nirvana-591789a12da78.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/musicbanner/nirvana-515f7e1a6f50b.jpg',
                 imageID: '78008',
-                likeCount: 3,
+                likeCount: 4,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/musicbanner/nirvana-515f7e1a6f50b.jpg',
               },
             ],
@@ -110,7 +110,7 @@ Generated by [AVA](https://ava.li).
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/musiclogo/nirvana-4e4b9bc06dcc4.png',
                 imageID: '8957',
-                likeCount: 5,
+                likeCount: 6,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/musiclogo/nirvana-4e4b9bc06dcc4.png',
               },
             ],
@@ -118,49 +118,73 @@ Generated by [AVA](https://ava.li).
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5261733fe6c60.png',
                 imageID: '101686',
-                likeCount: 6,
+                likeCount: 7,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5261733fe6c60.png',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-518a696cda12f.png',
                 imageID: '81480',
-                likeCount: 5,
+                likeCount: 7,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-518a696cda12f.png',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-518ada7d98805.png',
                 imageID: '81521',
-                likeCount: 5,
+                likeCount: 7,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-518ada7d98805.png',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-561900ee87f11.png',
                 imageID: '181150',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-561900ee87f11.png',
               },
+              {
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5c7c5d116b427.png',
+                imageID: '260035',
+                likeCount: 5,
+                url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5c7c5d116b427.png',
+              },
+              {
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5c0d8d0dbb1cd.png',
+                imageID: '252735',
+                likeCount: 4,
+                url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5c0d8d0dbb1cd.png',
+              },
+              {
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5c0d8d16333f9.png',
+                imageID: '252736',
+                likeCount: 4,
+                url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5c0d8d16333f9.png',
+              },
+              {
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5c0d8d1ddf738.png',
+                imageID: '252737',
+                likeCount: 4,
+                url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5c0d8d1ddf738.png',
+              },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-518a696c1ab0b.png',
                 imageID: '81479',
-                likeCount: 3,
+                likeCount: 4,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-518a696c1ab0b.png',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-561900db6b999.png',
                 imageID: '181149',
-                likeCount: 2,
+                likeCount: 3,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-561900db6b999.png',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5619010106ffb.png',
                 imageID: '181151',
-                likeCount: 2,
+                likeCount: 3,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-5619010106ffb.png',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-59039625adb45.png',
                 imageID: '217621',
-                likeCount: 1,
+                likeCount: 2,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/hdmusiclogo/nirvana-59039625adb45.png',
               },
             ],
@@ -168,45 +192,31 @@ Generated by [AVA](https://ava.li).
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistthumb/nirvana-4fb61ff40a15a.jpg',
                 imageID: '31455',
-                likeCount: 5,
+                likeCount: 6,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistthumb/nirvana-4fb61ff40a15a.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistthumb/nirvana-4fb6205204d6e.jpg',
                 imageID: '31456',
-                likeCount: 4,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistthumb/nirvana-4fb6205204d6e.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistthumb/nirvana-515ddb61b444b.jpg',
                 imageID: '77828',
-                likeCount: 3,
+                likeCount: 4,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistthumb/nirvana-515ddb61b444b.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistthumb/nirvana-4fb61fd2f3204.jpg',
                 imageID: '31454',
-                likeCount: 3,
+                likeCount: 4,
                 url: 'https://assets.fanart.tv/preview/music/5b11f4ce-a62d-471e-81fc-a69a8278c7da/artistthumb/nirvana-4fb61fd2f3204.jpg',
               },
             ],
           },
         },
       },
-    
-
-## labels have a fanArt field and preview images
-
-> Snapshot 1
-
-    {
-      lookup: {
-        label: {
-          fanArt: {
-            logos: [],
-          },
-        },
-      },
     }
 
 ## release groups have a fanArt field and preview images
@@ -218,82 +228,94 @@ Generated by [AVA](https://ava.li).
         releaseGroup: {
           fanArt: {
             albumCovers: [
-              {
-                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-4decb408b6604.jpg',
-                imageID: '4417',
-                likeCount: 12,
-                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-4decb408b6604.jpg',
-              },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-53afcfaa65a86.jpg',
                 imageID: '128223',
-                likeCount: 6,
+                likeCount: 13,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-53afcfaa65a86.jpg',
               },
+              {
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-535054d4e2e32.jpg',
+                imageID: '118729',
+                likeCount: 7,
+                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-535054d4e2e32.jpg',
+              },
+              {
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-5e1bd6d08e565.jpg',
+                imageID: '283340',
+                likeCount: 7,
+                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-5e1bd6d08e565.jpg',
+              },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-5647389f76c9a.jpg',
                 imageID: '183166',
-                likeCount: 3,
+                likeCount: 6,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-5647389f76c9a.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-555319062404d.jpg',
                 imageID: '163522',
-                likeCount: 3,
+                likeCount: 6,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-555319062404d.jpg',
               },
               {
-                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-535054d4e2e32.jpg',
-                imageID: '118729',
-                likeCount: 3,
-                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-535054d4e2e32.jpg',
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-55cbdf80ef05c.jpg',
+                imageID: '174560',
+                likeCount: 6,
+                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-55cbdf80ef05c.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-53cf470795637.jpg',
                 imageID: '130679',
-                likeCount: 2,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-53cf470795637.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a82b1a7c6cd.jpg',
                 imageID: '225420',
-                likeCount: 1,
+                likeCount: 5,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a82b1a7c6cd.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a82d31adb2f.jpg',
                 imageID: '225421',
-                likeCount: 1,
+                likeCount: 4,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a82d31adb2f.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-55c4af535f7e9.jpg',
                 imageID: '173720',
-                likeCount: 1,
+                likeCount: 4,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-55c4af535f7e9.jpg',
               },
               {
-                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-55cbdf80ef05c.jpg',
-                imageID: '174560',
-                likeCount: 1,
-                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-55cbdf80ef05c.jpg',
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-5e66d1295bad3.jpg',
+                imageID: '289604',
+                likeCount: 3,
+                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-5e66d1295bad3.jpg',
               },
               {
-                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a31c7ad5931.jpg',
-                imageID: '225172',
-                likeCount: 0,
-                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a31c7ad5931.jpg',
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-603e7e8d5d50a.jpg',
+                imageID: '329894',
+                likeCount: 3,
+                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-603e7e8d5d50a.jpg',
+              },
+              {
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-5c709e472b685.jpg',
+                imageID: '259037',
+                likeCount: 3,
+                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-5c709e472b685.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a48bfb008e3.jpg',
                 imageID: '225266',
-                likeCount: 0,
+                likeCount: 3,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a48bfb008e3.jpg',
               },
               {
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a48df6822b4.jpg',
                 imageID: '225267',
-                likeCount: 0,
+                likeCount: 3,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/albumcover/the-dark-side-of-the-moon-59a48df6822b4.jpg',
               },
             ],
@@ -312,6 +334,13 @@ Generated by [AVA](https://ava.li).
                 size: 1000,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-56047e045d648.png',
               },
+              {
+                discNumber: 1,
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-59a0791276643.png',
+                imageID: '225077',
+                size: 1000,
+                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-59a0791276643.png',
+              },
               {
                 discNumber: 3,
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-50aa6521ef0f3.png',
@@ -319,6 +348,13 @@ Generated by [AVA](https://ava.li).
                 size: 1000,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-50aa6521ef0f3.png',
               },
+              {
+                discNumber: 1,
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-59a3237b3607a.png',
+                imageID: '225188',
+                size: 1000,
+                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-59a3237b3607a.png',
+              },
               {
                 discNumber: 1,
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-56047e56b51f8.png',
@@ -333,13 +369,6 @@ Generated by [AVA](https://ava.li).
                 size: 1000,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-5957ea48b6728.png',
               },
-              {
-                discNumber: 1,
-                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-59a0791276643.png',
-                imageID: '225077',
-                size: 1000,
-                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-59a0791276643.png',
-              },
               {
                 discNumber: 1,
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-501c2a49803a0.png',
@@ -396,13 +425,6 @@ Generated by [AVA](https://ava.li).
                 size: 1000,
                 url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-54c55c43410af.png',
               },
-              {
-                discNumber: 1,
-                fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-59a3237b3607a.png',
-                imageID: '225188',
-                size: 1000,
-                url: 'https://assets.fanart.tv/preview/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-59a3237b3607a.png',
-              },
               {
                 discNumber: 1,
                 fullSizeURL: 'https://assets.fanart.tv/fanart/music/83d91898-7763-47d7-b03b-b92132375c47/cdart/the-dark-side-of-the-moon-532569d57474d.png',
@@ -421,4 +443,33 @@ Generated by [AVA](https://ava.li).
           },
         },
       },
-    }
+    }
+
+## labels have a fanArt field and preview images
+
+> Snapshot 1
+
+    {
+      lookup: {
+        label: {
+          fanArt: {
+            logos: [
+              {
+                color: null,
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/0cf56645-50ec-4411-aeb6-c9f4ce0f8edb/musiclabel/hardly-art-5c71e1b57f00c.png',
+                imageID: '259128',
+                likeCount: 0,
+                url: 'https://assets.fanart.tv/preview/music/0cf56645-50ec-4411-aeb6-c9f4ce0f8edb/musiclabel/hardly-art-5c71e1b57f00c.png',
+              },
+              {
+                color: null,
+                fullSizeURL: 'https://assets.fanart.tv/fanart/music/0cf56645-50ec-4411-aeb6-c9f4ce0f8edb/musiclabel/hardly-art-5c71e1b586d3b.png',
+                imageID: '259129',
+                likeCount: 0,
+                url: 'https://assets.fanart.tv/preview/music/0cf56645-50ec-4411-aeb6-c9f4ce0f8edb/musiclabel/hardly-art-5c71e1b586d3b.png',
+              },
+            ],
+          },
+        },
+      },
+    }