first sync

Server/services/Service.js

@@ -0,0 +1,10 @@
+const Logger = require('../logger')
+
+class Service {
+  constructor (ctx) {
+    this.ctx = ctx
+    this.log = new Logger(this.constructor.name)
+  }
+}
+
+module.exports = Service

Server/services/discord.js

@@ -0,0 +1,80 @@
+const Service = require('./Service')
+const discord = require('discord.js')
+const superagent = require('superagent')
+
+class DiscordService extends Service {
+  constructor (ctx) {
+    super(ctx)
+
+    this.botToken = process.env.DISCORD_BOT_TOKEN
+    this.clientId = process.env.DISCORD_CLIENT_ID
+    this.clientSecret = process.env.DISCORD_CLIENT_SECRET
+    this.oauthCallback = process.env.OAUTH_AUTH_CALLBACK
+    this.botCallback = `${ctx.config.appUrl}/oauth/bot/callback`
+
+    this.startBot()
+  }
+
+  async startBot () {
+    await discord.login(this.botToken)
+  }
+
+  // oauth step 2 flow, grab the auth token via code
+  async getAuthToken (code) {
+    const url = 'https://discordapp.com/api/oauth2/token'
+    try {
+      const rsp =
+        await superagent
+          .post(url)
+          .send({
+            client_id: this.clientId,
+            client_secret: this.clientSecret,
+            grant_type: 'authorization_code',
+            code: code,
+            redirect_uri: this.oauthCallback
+          })
+
+      return rsp.body
+    } catch (e) {
+      this.log.error('getAuthToken failed', e)
+      throw e
+    }
+  }
+
+  // on sign out, we revoke the token we had.
+  async revokeAuthToken (code, state) {
+    const url = 'https://discordapp.com/api/oauth2/revoke'
+    try {
+      const rsp =
+        await superagent
+          .post(url)
+          .send({
+            client_id: this.clientId,
+            client_secret: this.clientSecret,
+            grant_type: 'authorization_code',
+            code: code,
+            redirect_uri: this.oauthCallback
+          })
+
+      return rsp.body
+    } catch (e) {
+      this.log.error('getAuthToken failed', e)
+      throw e
+    }
+  }
+
+  // returns oauth authorize url with IDENTIFY permission
+  // we only need IDENTIFY because we only use it for matching IDs from the bot
+  getAuthUrl (state) {
+    return `https://discordapp.com/oauth2/authorize?client_id=${this.clientId}&redirect_uri=${this.oauthCallback}&response_type=code&scope=identify`
+  }
+
+  // returns the bot join url with MANAGE_ROLES permission
+  // MANAGE_ROLES is the only permission we really need.
+  getBotJoinUrl () {
+    return `https://discordapp.com/oauth2/authorize?client_id=${this.clientId}&scope=bot&permissions=268435456&redirect_uri=${this.botCallback}`
+  }
+
+}
+
+module.exports = DiscordService