auth_state_manager 0.2.1

This package helps you to monitor auth statuses in your app.

Auth State Manager

Auth state manager helps you to monitor auth changes in your app. This package is suitable if you use HTTP requests in your app and you require access-tokens for APIs. The package will save the access-token to shared preferences and returns it when you need.

Installation

1. Add the latest version of package to your pubspec.yaml (and rundart pub get):

dependencies:
  auth_state_manager: ^0.1.1

2. Import the package in main.dart

import 'package:auth_state_manager/auth_state_manager.dart';

3. Initialize AuthStateManager.
   • Make sure to add async to main() function.
   • Make sure to initialize FlutterBinding by WidgetsFlutterBinding.ensureInitialized();
   • Make sure await AuthStateManager initialization.

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await AuthStateManager.initializeAuthState();
  runApp(
    const MaterialApp(
      home: MyApp(),
    ),
  );
}

Usage

1. Wrap your root widget with AuthStateListener and provide widgets for both authenticated and unAuthenticated states. This will help you to control authentication flow of your app. If you did not authorize yet AuthStateListener returns unAuthenticated widget, if you logged in before it returns authenticated.

@override
  Widget build(BuildContext context) {
    return const AuthStateListener(
      authenticated: MainScreen(),
      unAuthenticated: LoginScreen(),
    );
  }

2. Save your access-token to AuthState by

await AuthStateManager.instance.setToken('MyToken');

setToken() is async so make sure to await it. Note that saving your token will not trigger Auth State Change. To change the Auth State you should use login() function.

final bool isSuccessful =
    await AuthStateManager.instance.setToken('MyToken');
if (isSuccessful) {
    AuthStateManager.instance.login();
}

3. Delete access-token and signOut by

AuthStateManager.instance.logOut();

logOut() function will delete access-token and trigger Auth State Change.

4. Listen to auth status changes by

late final StreamSubscription _authStateSub;

  @override
  void initState() {
    super.initState();
    _authStateSub = AuthStateManager.instance.authStateAsStream.listen((state) {
      if (!mounted) return;
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text('isAuthenticated: $state'),
        ),
      );
    });
  }

  @override
  void dispose() {
    super.dispose();
    _authStateSub.cancel();
  }

AuthStateManager.instance.authStateAsStream returns Stream<bool> which you can listen to.

Example

Check out to github repository /example for more information.