chore: Extract authentication logic of the apps to their own classes

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

@@ -1,78 +1,9 @@
-import { google, google as GoogleApi } from 'googleapis';
-import App from '../../models/app';
-import Field from '../../types/field';
+import Authentication from './authentication'
 
 export default class Firebase {
-  oauthClient: any
-  connectionData: any
-  appData: any
-
-  scopes: string[] = [
-    'https://www.googleapis.com/auth/datastore',
-    'https://www.googleapis.com/auth/firebase',
-    'https://www.googleapis.com/auth/user.emails.read',
-    'profile',
-  ]
+  authenticationClient: any
 
   constructor(connectionData: any) {
-    this.appData = App.findOneByKey('firebase');
-    this.connectionData = connectionData;
-
-    this.oauthClient = new GoogleApi.auth.OAuth2(
-      connectionData.consumerKey,
-      connectionData.consumerSecret,
-      this.oauthRedirectUrl,
-    );
-
-    GoogleApi.options({ auth: this.oauthClient });
-  }
-
-  get oauthRedirectUrl() {
-    return this.appData.fields.find((field: Field) => field.key == 'oAuthRedirectUrl').value;
-  }
-
-  async createAuthData() {
-    const url = this.oauthClient.generateAuthUrl({
-      access_type: 'offline',
-      scope: this.scopes
-    });
-
-    return { url };
-  }
-
-  async verifyCredentials() {
-    const { tokens } = await this.oauthClient.getToken(this.connectionData.oauthVerifier);
-    this.oauthClient.setCredentials(tokens);
-
-    const people = GoogleApi.people('v1');
-
-    const { data } = await people.people.get({
-      resourceName: 'people/me',
-      personFields: 'emailAddresses',
-    });
-
-    const { emailAddresses, resourceName: userId } = data;
-    const primaryEmailAddress = emailAddresses.find(emailAddress => emailAddress.metadata.primary);
-
-    return {
-      consumerKey: this.connectionData.consumerKey,
-      consumerSecret: this.connectionData.consumerSecret,
-      accessToken: tokens.access_token,
-      refreshToken: tokens.refresh_token,
-      tokenType: tokens.token_type,
-      expiryDate: tokens.expiry_date,
-      scope: tokens.scope,
-      screenName: primaryEmailAddress.value,
-      userId,
-    }
-  }
-
-  async isStillVerified() {
-    try {
-      await this.oauthClient.getTokenInfo(this.connectionData.accessToken);
-      return true;
-    } catch {
-      return false
-    }
+    this.authenticationClient = new Authentication(connectionData);
   }
 }