feat: added google support

src/core/server/app/middleware/passport/index.ts

@@ -7,6 +7,7 @@ import passport, { Authenticator } from "passport";
 
 import { Config } from "talk-common/config";
 import FacebookStrategy from "talk-server/app/middleware/passport/strategies/facebook";
+import GoogleStrategy from "talk-server/app/middleware/passport/strategies/google";
 import { JWTStrategy } from "talk-server/app/middleware/passport/strategies/jwt";
 import { createLocalStrategy } from "talk-server/app/middleware/passport/strategies/local";
 import OIDCStrategy from "talk-server/app/middleware/passport/strategies/oidc";
@@ -54,6 +55,9 @@ export function createPassport(
   // Use the FacebookStrategy.
   auth.use(new FacebookStrategy(options));
 
+  // Use the GoogleStrategy.
+  auth.use(new GoogleStrategy(options));
+
   return auth;
 }
 

src/core/server/app/middleware/passport/strategies/facebook.ts

@@ -77,6 +77,8 @@ export default class FacebookStrategy extends OAuth2Strategy<
       });
     }
 
+    // TODO: maybe update user details?
+
     return user;
   }
 

src/core/server/app/middleware/passport/strategies/google.ts

@@ -0,0 +1,116 @@
+import { Db } from "mongodb";
+import { Profile, Strategy } from "passport-google-oauth2";
+
+import { Config } from "talk-common/config";
+import OAuth2Strategy from "talk-server/app/middleware/passport/strategies/oauth2";
+import { reconstructTenantURL } from "talk-server/app/url";
+import {
+  GQLAuthIntegrations,
+  GQLGoogleAuthIntegration,
+  GQLUSER_ROLE,
+} from "talk-server/graph/tenant/schema/__generated__/types";
+import { Tenant } from "talk-server/models/tenant";
+import {
+  GoogleProfile,
+  retrieveUserWithProfile,
+} from "talk-server/models/user";
+import TenantCache from "talk-server/services/tenant/cache";
+import { upsert } from "talk-server/services/users";
+
+export interface GoogleStrategyOptions {
+  config: Config;
+  mongo: Db;
+  tenantCache: TenantCache;
+}
+
+export interface GoogleStrategyOptions {
+  config: Config;
+  mongo: Db;
+  tenantCache: TenantCache;
+}
+
+export default class GoogleStrategy extends OAuth2Strategy<
+  GQLGoogleAuthIntegration,
+  Strategy
+> {
+  public name = "google";
+
+  constructor(options: GoogleStrategyOptions) {
+    super({
+      ...options,
+      scope: ["profile"],
+    });
+  }
+
+  protected getIntegration = (integrations: GQLAuthIntegrations) =>
+    integrations.google;
+
+  protected async findOrCreateUser(
+    tenant: Tenant,
+    integration: Required<GQLGoogleAuthIntegration>,
+    { id, photos, emails, displayName }: Profile
+  ) {
+    // Create the user profile that will be used to lookup the User.
+    const profile: GoogleProfile = {
+      type: "google",
+      id,
+    };
+
+    let user = await retrieveUserWithProfile(this.mongo, tenant.id, profile);
+    if (!user) {
+      if (!integration.allowRegistration) {
+        // Registration is disabled, so we can't create the user user here.
+        return;
+      }
+
+      // FIXME: implement rules.
+
+      // Try to get the avatar.
+      let avatar: string | undefined;
+      if (photos && photos.length > 0) {
+        avatar = photos[0].value;
+      }
+
+      // Try to get the email address.
+      let email: string | undefined;
+      let emailVerified: boolean | undefined;
+      if (emails && emails.length > 0) {
+        email = emails[0].value;
+        emailVerified = false;
+      }
+
+      user = await upsert(this.mongo, tenant, {
+        username: null,
+        displayName,
+        role: GQLUSER_ROLE.COMMENTER,
+        email,
+        email_verified: emailVerified,
+        avatar,
+        profiles: [profile],
+      });
+    }
+
+    // TODO: maybe update user details?
+
+    return user;
+  }
+
+  protected createStrategy(
+    tenant: Tenant,
+    integration: Required<GQLGoogleAuthIntegration>
+  ) {
+    return new Strategy(
+      {
+        clientID: integration.clientID,
+        clientSecret: integration.clientSecret,
+        callbackURL: reconstructTenantURL(
+          this.config,
+          tenant,
+          "/api/tenant/auth/google/callback"
+        ),
+        passReqToCallback: true,
+      },
+      this.verifyCallback
+    );
+  }
+}

src/core/server/app/middleware/passport/strategies/oauth2.ts

@@ -21,6 +21,7 @@ export interface OAuth2StrategyOptions {
   config: Config;
   mongo: Db;
   tenantCache: TenantCache;
+  scope?: string[];
 }
 
 export default abstract class OAuth2Strategy<
@@ -30,13 +31,15 @@ export default abstract class OAuth2Strategy<
   protected config: Config;
   protected mongo: Db;
   protected cache: TenantCacheAdapter<U>;
+  private scope?: string[];
 
-  constructor({ config, mongo, tenantCache }: OAuth2StrategyOptions) {
+  constructor({ config, mongo, tenantCache, scope }: OAuth2StrategyOptions) {
     super();
 
     this.config = config;
     this.mongo = mongo;
     this.cache = new TenantCacheAdapter(tenantCache);
+    this.scope = scope;
   }
 
   protected abstract getIntegration(integrations: GQLAuthIntegrations): T;
@@ -114,7 +117,10 @@ export default abstract class OAuth2Strategy<
       strategy.redirect = this.redirect.bind(this);
       strategy.success = this.success.bind(this);
 
-      strategy.authenticate(req, { session: false });
+      strategy.authenticate(req, {
+        session: false,
+        scope: this.scope,
+      });
     } catch (err) {
       return this.error(err);
     }