Flutter Firebase Auth SDK

A reusable Authentication SDK powered by Firebase that supports both a pre-built UI and a no-UI mode for custom implementation.

Features

• Dual Mode UI:
  • Default Mode: Plug-and-play AuthScreen widget.
  • Headless Mode: Exposed AuthService and streams for building custom UIs.
• Unified Error Handling: Maps Firebase errors to custom exceptions (UserNotFoundException, InvalidCredentialsException, etc.).
• Configurable: Enable/disable providers via AuthConfig.
• State Management: Built-in streams for Authenticated, Unauthenticated, TokenExpired.

Installation

1. Add the dependency to your pubspec.yaml:

dependencies:
  flutter_firebase_auth_sdk:
    path: path/to/flutter_firebase_auth_sdk

2. (Optional) For full Firebase support, ensure you have configured your Flutter app with Firebase:
   • Add Firebase to your Flutter app

Usage

1. Default Mode (Pre-built UI)

import 'package:flutter_firebase_auth_sdk/arc_firebase_auth_sdk.dart';

// ...

AuthScreen(
  config: AuthConfig(
    enableEmailPassword: true,
    enableGoogle: true,
    enableApple: true,
  ),
  authService: FirebaseAuthService(), // Or MockAuthService() for testing
  onAuthSuccess: () {
    print("User authenticated!");
  },
);

2. Headless Mode (Custom UI)

final authService = FirebaseAuthService();

// Sign In
try {
  await authService.signInWithEmailAndPassword(
    email: 'test@example.com', 
    password: 'password'
  );
} on AuthException catch (e) {
  print(e.message);
}

// Listen to state
StreamBuilder<AuthState>(
  stream: authService.authStateChanges,
  builder: (context, snapshot) {
    if (snapshot.data?.status == AuthStatus.authenticated) {
      return HomePage();
    }
    return LoginPage();
  },
);

Error Handling

The SDK maps Firebase errors to specific exceptions:

• InvalidCredentialsException: Wrong email/password.
• UserNotFoundException: User does not exist.
• EmailAlreadyInUseException: Email already registered.
• WeakPasswordException: Password is too weak.
• NetworkException: Network connectivity issues.

##Screenshot