refactor [discord] service (#2107)

lib/all-badge-examples.js

@@ -432,10 +432,6 @@ const allBadgeExamples = [
         title: 'Gitter',
         previewUrl: '/gitter/room/nwjs/nw.js.svg',
       },
-      {
-        title: 'Discord',
-        previewUrl: '/discord/102860784329052160.svg',
-      },
     ],
   },
   {

services/discord/discord.service.js

@@ -1,49 +1,65 @@
 'use strict'
 
-const LegacyService = require('../legacy-service')
-const { makeBadgeData: getBadgeData } = require('../../lib/badge-data')
+const Joi = require('joi')
+const BaseJsonService = require('../base-json')
 
-module.exports = class Discord extends LegacyService {
-  static registerLegacyRouteHandler({ camp, cache }) {
-    camp.route(
-      /^\/discord\/([^/]+)\.(svg|png|gif|jpg|json)$/,
-      cache((data, match, sendBadge, request) => {
-        const serverID = match[1]
-        const format = match[2]
-        const apiUrl = `https://discordapp.com/api/guilds/${serverID}/widget.json`
+const discordSchema = Joi.object({
+  members: Joi.array()
+    .allow(null)
+    .required(),
+}).required()
 
-        request(apiUrl, (err, res, buffer) => {
-          const badgeData = getBadgeData('chat', data)
-          if (res && res.statusCode === 404) {
-            badgeData.text[1] = 'invalid server'
-            sendBadge(format, badgeData)
-            return
-          }
-          if (err != null || !res || res.statusCode !== 200) {
-            badgeData.text[1] = 'inaccessible'
-            if (res && res.headers['content-type'] === 'application/json') {
-              try {
-                const data = JSON.parse(buffer)
-                if (data && typeof data.message === 'string') {
-                  badgeData.text[1] = data.message.toLowerCase()
-                }
-              } catch (e) {}
-            }
-            sendBadge(format, badgeData)
-            return
-          }
-          try {
-            const data = JSON.parse(buffer)
-            const members = Array.isArray(data.members) ? data.members : []
-            badgeData.text[1] = members.length + ' online'
-            badgeData.colorscheme = 'brightgreen'
-            sendBadge(format, badgeData)
-          } catch (e) {
-            badgeData.text[1] = 'invalid'
-            sendBadge(format, badgeData)
-          }
-        })
-      })
-    )
+module.exports = class Discord extends BaseJsonService {
+  async fetch({ serverId }) {
+    const url = `https://discordapp.com/api/guilds/${serverId}/widget.json`
+    return this._requestJson({
+      url,
+      schema: discordSchema,
+      errorMessages: {
+        404: 'invalid server',
+        403: 'widget disabled',
+      },
+    })
+  }
+
+  static render({ members }) {
+    return {
+      message: `${members} online`,
+      color: 'brightgreen',
+    }
+  }
+
+  async handle({ serverId }) {
+    const data = await this.fetch({ serverId })
+    const members = Array.isArray(data.members) ? data.members : []
+    return this.constructor.render({ members: members.length })
+  }
+
+  // Metadata
+  static get defaultBadgeData() {
+    return { label: 'chat' }
+  }
+
+  static get category() {
+    return 'chat'
+  }
+
+  static get url() {
+    return {
+      base: 'discord',
+      format: '([^/]+)',
+      capture: ['serverId'],
+    }
+  }
+
+  static get examples() {
+    return [
+      {
+        title: 'Discord',
+        exampleUrl: '102860784329052160',
+        urlPattern: ':serverId',
+        staticExample: this.render({ members: 23 }),
+      },
+    ]
   }
 }

services/discord/discord.tester.js

@@ -7,11 +7,12 @@ const t = new ServiceTester({ id: 'discord', title: 'Discord' })
 module.exports = t
 
 t.create('gets status for Reactiflux')
-  .get('/102860784329052160.json')
+  .get('/102860784329052160.json?style=_shields_test')
   .expectJSONTypes(
     Joi.object().keys({
       name: 'chat',
       value: Joi.string().regex(/^[0-9]+ online$/),
+      colorB: '#4c1',
     })
   )