firebase with custom auth token from backend

Author: Umair-Manzoor-47

modules/auth/lib/auth_module.dart

@@ -8,6 +8,7 @@ import 'package:ensemble_auth/connect/widget/connect_with_google.dart';
 import 'package:ensemble_auth/connect/widget/connect_with_microsoft.dart';
 import 'package:ensemble_auth/signin/auth_manager.dart';
 import 'package:ensemble_auth/signin/sign_in_anonymous.dart';
+import 'package:ensemble_auth/signin/sign_in_with_custom_auth.dart';
 import 'package:ensemble_auth/signin/widget/sign_in_with_apple.dart';
 // import 'package:ensemble_auth/signin/widget/sign_in_with_auth0.dart';
 import 'package:ensemble_auth/signin/widget/sign_in_with_google.dart';
@@ -26,5 +27,6 @@ class AuthModuleImpl implements AuthModule {
     GetIt.I.registerSingleton<TokenManager>(TokenManagerImpl());
     GetIt.I.registerFactory<OAuthController>(() => OAuthControllerImpl());
     GetIt.I.registerFactory<SignInAnonymous>(() => SignInAnonymousImpl());
+    GetIt.I.registerFactory<SignInWithCustomAuth>(() => SignInWithCustomAuthImpl());
   }
 }

modules/auth/lib/signin/auth_manager.dart

@@ -132,6 +132,35 @@ class AuthManager with UserAuthentication {
     }
   }
 
+  Future<bool?> signInWithCustomAuth(
+      BuildContext context,
+      {required String idToken}
+  ) async {
+    try {
+      customFirebaseApp ??= await _initializeFirebaseSignIn();
+      final _auth = FirebaseAuth.instanceFor(app: customFirebaseApp!);
+
+      UserCredential userCredential = await _auth.signInWithCustomToken(idToken);
+      User? user = userCredential.user;
+      if (user == null) {
+        print('Sign in with custom firebase auth token failed');
+        return null;
+      }
+      Future<void> updateCurrentUser(BuildContext context, User newUser) async {
+        await StorageManager()
+            .writeToSystemStorage(UserAuthentication._idKey, newUser.uid);
+        await StorageManager()
+            .writeToSystemStorage(UserAuthentication._isAnonymous, user.isAnonymous);
+      }
+
+      updateCurrentUser(context, user);
+      return user.isAnonymous;
+    } catch (e) {
+      print(e.toString());
+      return null;
+    }
+  }
+
   Future<String?> _signInLocally(BuildContext context,
       {required AuthenticatedUser user, AuthToken? token}) async {
     // update the current user

modules/ensemble/lib/framework/action.dart

@@ -930,6 +930,28 @@ class SignInAnonymousAction extends EnsembleAction {
   }
 }
 
+class SignInWithCustomAuthAction extends EnsembleAction {
+  final EnsembleAction? onAuthenticated;
+  final EnsembleAction? onError;
+  final String? idToken;
+
+  SignInWithCustomAuthAction({
+    super.initiator,
+    super.inputs,
+    required this.onAuthenticated,
+    required this.onError,
+    this.idToken,
+  });
+
+  factory SignInWithCustomAuthAction.fromYaml({Map? payload}) {
+    return SignInWithCustomAuthAction(
+      onAuthenticated: EnsembleAction.from(payload?['onAuthenticated']),
+      onError: EnsembleAction.from(payload?['onError']),
+      idToken: payload?['token'],
+    );
+  }
+}
+
 class ClearKeychain extends EnsembleAction {
   ClearKeychain({
     required this.key,
@@ -1038,6 +1060,7 @@ enum ActionType {
   setLocale,
   clearLocale,
   signInAnonymous,
+  signInWithCustomAuth,
   handleDeeplink,
   createDeeplink,
   verifySignIn,
@@ -1170,6 +1193,8 @@ abstract class EnsembleAction {
       return FileUploadAction.fromYaml(payload: payload);
     } else if (actionType == ActionType.signInAnonymous) {
       return SignInAnonymousAction.fromYaml(payload: payload);
+    } else if (actionType == ActionType.signInWithCustomAuth) {
+      return SignInWithCustomAuthAction.fromYaml(payload: payload);
     } else if (actionType == ActionType.pickFiles) {
       return FilePickerAction.fromYaml(payload: payload);
     } else if (actionType == ActionType.openUrl) {

modules/ensemble/lib/module/auth_module.dart

@@ -17,6 +17,7 @@ class AuthModuleStub implements AuthModule {
     GetIt.I.registerSingleton<TokenManager>(TokenManagerStub());
     GetIt.I.registerFactory<OAuthController>(() => OAuthControllerStub());
     GetIt.I.registerFactory<SignInAnonymous>(() => SignInAnonymousStub());
+    GetIt.I.registerFactory<SignInWithCustomAuth>(() => SignInWithCustomAuthStub());
     // note that we don't inject AuthContextManagerStub(), since its presence
     // will prevent data_context to load
   }

modules/ensemble/lib/screen_controller.dart

@@ -405,6 +405,8 @@ class ScreenController {
       GetIt.I<FileManager>().pickFiles(context, action, scopeManager);
     } else if (action is SignInAnonymousAction) {
       GetIt.I<SignInAnonymous>().signInAnonymously(context, action: action);
+    } else if (action is SignInWithCustomAuthAction) {
+      GetIt.I<SignInWithCustomAuth>().signInWithCustomAuth(context, action: action);
     } else if (action is WalletConnectAction) {
       //  TODO store session:  WalletConnectSession? session = await sessionStorage.getSession();
 

modules/ensemble/lib/widget/stub_widgets.dart

@@ -68,3 +68,17 @@ class SignInAnonymousStub implements SignInAnonymous {
         "Auth is not enabled. Please review the Ensemble documentation.");
   }
 }
+
+abstract class SignInWithCustomAuth {
+  Future<void> signInWithCustomAuth(BuildContext context,
+      {required SignInWithCustomAuthAction action});
+}
+
+class SignInWithCustomAuthStub implements SignInWithCustomAuth {
+  @override
+  Future<void> signInWithCustomAuth(BuildContext context,
+      {required SignInWithCustomAuthAction action}) {
+    throw ConfigError(
+        "Auth is not enabled. Please review the Ensemble documentation.");
+  }
+}