Add GitHub discussions total badge [GithubTotalDiscussions] (#6472)

* use headers from options passed as argument in request method

* add github total discussions badge

* use nonNegativeInteger for total discussion count

Co-authored-by: repo-ranger[bot] <39074581+repo-ranger[bot]@users.noreply.github.com>

services/github/github-api-provider.js

@@ -188,6 +188,7 @@ class GithubApiProvider {
           'User-Agent': userAgent,
           Accept: 'application/vnd.github.v3+json',
           Authorization: `token ${tokenString}`,
+          ...options.headers,
         },
       },
     }

services/github/github-discussions-total.service.js

@@ -0,0 +1,74 @@
+'use strict'
+
+const { default: gql } = require('graphql-tag')
+const Joi = require('joi')
+const { nonNegativeInteger } = require('../validators')
+const { GithubAuthV4Service } = require('./github-auth-service')
+const { transformErrors } = require('./github-helpers')
+
+const schema = Joi.object({
+  data: Joi.object({
+    repository: Joi.object({
+      discussions: Joi.object({
+        totalCount: nonNegativeInteger,
+      }).required(),
+    }).required(),
+  }).required(),
+}).required()
+
+module.exports = class GithubTotalDiscussions extends GithubAuthV4Service {
+  static category = 'other'
+  static route = {
+    base: 'github/discussions',
+    pattern: ':user/:repo',
+  }
+
+  static examples = [
+    {
+      title: 'GitHub Discussions',
+      namedParams: {
+        user: 'vercel',
+        repo: 'next.js',
+      },
+      staticPreview: this.render({
+        discussions: '6000 total',
+      }),
+    },
+  ]
+
+  static defaultBadgeData = { label: 'discussions', color: 'blue' }
+
+  static render({ discussions }) {
+    return { message: discussions }
+  }
+
+  async fetch({ user, repo }) {
+    return this._requestGraphql({
+      query: gql`
+        query($user: String!, $repo: String!) {
+          repository(name: $repo, owner: $user) {
+            discussions {
+              totalCount
+            }
+          }
+        }
+      `,
+      variables: { user, repo },
+      schema,
+      options: { headers: { 'GraphQL-Features': 'discussions_api' } },
+      transformErrors,
+    })
+  }
+
+  async handle({ user, repo }) {
+    const json = await this.fetch({ user, repo })
+    const {
+      data: {
+        repository: {
+          discussions: { totalCount },
+        },
+      },
+    } = json
+    return this.constructor.render({ discussions: `${totalCount} total` })
+  }
+}

services/github/github-discussions-total.tester.js

@@ -0,0 +1,15 @@
+'use strict'
+
+const { withRegex } = require('../test-validators')
+const t = (module.exports = require('../tester').createServiceTester())
+
+t.create('GitHub Total Discussions (repo not found)')
+  .get('/not-a-user/not-a-repo.json')
+  .expectBadge({ label: 'discussions', message: 'repo not found' })
+
+// example: 6000 total
+const numberSpaceTotal = withRegex(/^\d+ total$/)
+
+t.create('GitHub Total Discussions (repo having discussions)')
+  .get('/vercel/next.js.json')
+  .expectBadge({ label: 'discussions', message: numberSpaceTotal })