feat: introduce discord authentication

packages/backend/src/apps/discord/index.ts

@@ -0,0 +1,91 @@
+import { URLSearchParams } from 'url';
+import DiscordApi from 'discord.js';
+import axios, { AxiosInstance } from 'axios';
+import App from '../../models/app';
+import Field from '../../types/field';
+
+export default class Discord {
+  client?: any
+  connectionData: any
+  appData: any
+  scope: string[] = ['identify', 'email']
+  httpClient: AxiosInstance = axios.create({
+    baseURL: 'https://discord.com/api/'
+  })
+
+  constructor(connectionData: any) {
+    this.connectionData = connectionData;
+    this.appData = App.findOneByKey('discord');
+  }
+
+  get oauthRedirectUrl() {
+    return this.appData.fields.find((field: Field) => field.key == 'oAuthRedirectUrl').value;
+  }
+
+  async createAuthLink() {
+    const searchParams = new URLSearchParams({
+      client_id: this.connectionData.consumerKey,
+      redirect_uri: this.oauthRedirectUrl,
+      response_type: 'code',
+      scope: this.scope.join(' '),
+    });
+
+    const url = `https://discord.com/api/oauth2/authorize?${searchParams.toString()}`;
+
+    return { url };
+  }
+
+  async verifyCredentials() {
+    const params = new URLSearchParams({
+      client_id: this.connectionData.consumerKey,
+      redirect_uri: this.oauthRedirectUrl,
+      response_type: 'code',
+      scope: this.scope.join(' '),
+      client_secret: this.connectionData.consumerSecret,
+      code: this.connectionData.oauthVerifier,
+      grant_type: 'authorization_code',
+    });
+    const { data: verifiedCredentials }: any = await this.httpClient.post('/oauth2/token', params.toString());
+
+    const {
+      access_token: accessToken,
+      refresh_token: refreshToken,
+      expires_in: expiresIn,
+      scope: scope,
+      token_type: tokenType,
+    } = verifiedCredentials;
+
+    const { data: user }: any = await this.httpClient.get('/users/@me', {
+      headers: {
+        Authorization: `${tokenType} ${accessToken}`,
+      },
+    });
+
+    return {
+      consumerKey: this.connectionData.consumerKey,
+      consumerSecret: this.connectionData.consumerSecret,
+      accessToken,
+      refreshToken,
+      expiresIn,
+      scope,
+      tokenType,
+      userId: user.id,
+      screenName: user.username,
+      email: user.email,
+    };
+  }
+
+  async isStillVerified() {
+    try {
+      await this.httpClient.get('/users/@me', {
+        headers: {
+          Authorization: `${this.connectionData.tokenType} ${this.connectionData.accessToken}`,
+        },
+      });
+
+      return true;
+    } catch {
+      return false
+    }
+  }
+}