Flutter bloc 8.x authentication not updating - flutter

Question

Im experimenting and learning on a small project and im trying to implement an authentication workflow. Ive implemented everything and by printing my steps everything should just work fine. Im wondering why my BlocBuilder isn't going to update. The project is really small so I can provide you everything easy. Since im learning bloc, i appreciate every hint, approach and I want to thank you in advance.
terminal output when the app is starting:
flutter: building main.dart
flutter: AppLoaded()
flutter: user is NOT signed in
flutter: false
flutter: Transition { currentState: AuthInitial(), event: AppLoaded(), nextState: UnauthenticatedState() }
flutter: block says user is NOT authenticated
This is completely fine since im checking at the beginning if there is any user data valid. Now when I press on the Login Textbutton in my home.dart my Blocbuilder should show that im logged in, but it doesnt. This is the terminal output:
flutter: AppLoaded()
flutter: signed id with credentials: User{id: 1, socketId: 123, userName: Logged in User}
flutter: user is signed in
flutter: true
flutter: currentuser is not empty: User{id: 1, socketId: 123, userName: Logged in User}
flutter: Transition { currentState: AuthInitial(), event: AppLoaded(), nextState: AuthenticatedState() }
flutter: block says user is authenticated
main.dart
import 'package:fl_auth/bloc/auth/auth_bloc.dart';
import 'package:fl_auth/repositories/user_repository.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'bloc/bloc_observer.dart';
import 'home.dart';
import 'models/auth.dart';
void main() {
BlocOverrides.runZoned(
() {
runApp(const MyApp());
},
blocObserver: SimpleBlocObserver(),
);
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
Auth _auth = Auth.instance;
UserRepository _userRepository = UserRepository(auth: _auth);
print('building main.dart');
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: BlocProvider(
create: (context) =>
AuthBloc(userRepository: _userRepository)..add(AppLoaded()),
child: Home(),
),
);
}
}
home.dart
import 'package:flutter/material.dart';
import 'package:flutter/src/foundation/key.dart';
import 'package:flutter/src/widgets/framework.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'bloc/auth/auth_bloc.dart';
import 'models/auth.dart';
import 'repositories/user_repository.dart';
class Home extends StatelessWidget {
const Home({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
Auth _auth = Auth.instance;
UserRepository _userRepository = UserRepository(auth: _auth);
AuthBloc authBloc = AuthBloc(userRepository: _userRepository);
return Scaffold(
body: SizedBox(
height: 500,
child: Column(
children: [
Container(
height: 200,
child: BlocBuilder<AuthBloc, AuthState>(
builder: (context, state) {
if (state is UnauthenticatedState) {
return Center(child: Text('User is unauthenticated'));
} else if (state is AuthenticatedState) {
return Center(child: Text('YEAH logged in!'));
} else {
return Center(child: Text('something went wrong'));
}
}),
),
TextButton(
onPressed: () => {
authBloc.userRepository.signIn(),
authBloc.add(AppLoaded())
},
child: Text('Login')),
],
)));
}
}
auth_event.dart
part of 'auth_bloc.dart';
abstract class AuthEvent extends Equatable {
const AuthEvent();
#override
List<Object> get props => [];
}
class AppLoaded extends AuthEvent {}
auth_state.dart
// ignore_for_file: public_member_api_docs, sort_constructors_first
part of 'auth_bloc.dart';
abstract class AuthState extends Equatable {
const AuthState();
#override
List<Object> get props => [];
}
class AuthInitial extends AuthState {}
class AuthenticatedState extends AuthState {
User user;
AuthenticatedState({
required this.user,
});
}
class UnauthenticatedState extends AuthState {}
auth.bloc
import 'package:bloc/bloc.dart';
import 'package:equatable/equatable.dart';
import 'package:fl_auth/repositories/user_repository.dart';
import '../../models/user.dart';
part 'auth_event.dart';
part 'auth_state.dart';
class AuthBloc extends Bloc<AuthEvent, AuthState> {
UserRepository userRepository;
AuthBloc({required this.userRepository}) : super(AuthInitial()) {
on<AppLoaded>((event, emit) async {
try {
var isSignedIn = await userRepository.isSignedIn();
print(isSignedIn);
if (isSignedIn) {
var user = await userRepository.getCurrentUser();
emit(AuthenticatedState(user: user));
print('block says user is authenticated');
} else {
emit(UnauthenticatedState());
print('block says user is NOT authenticated');
}
} catch (e) {
emit(UnauthenticatedState());
}
});
}
}
user_repository.dart
import 'package:fl_auth/models/user.dart';
import '../models/auth.dart';
class UserRepository {
Auth auth = Auth.instance;
UserRepository({required this.auth});
// sign in with username
//TODO: change hardcoded username to email and passwort later on
Future<User> signIn() async {
try{
await Future.delayed(Duration(seconds: 1));
var credentials = User(id: 1, socketId: '123', userName: 'Logged in User');
print('signed id with credentials: ${auth.currentUser}');
auth.currentUser = credentials;
return auth.currentUser;
}catch(e){
print(e.toString());
throw e;
}
}
// check signed in status
Future<bool> isSignedIn() async {
try{
await Future.delayed(const Duration(seconds: 1));
var currentUser = auth.currentUser;
if(currentUser.isNotEmpty){
print('user is signed in');
return true;
} else {
print('user is NOT signed in');
return false;
}
}catch(e){
print(e.toString());
throw e;
}
}
// get user
Future<User> getCurrentUser() async {
try{
await Future.delayed(const Duration(seconds: 1));
var currentUser = auth.currentUser;
if(currentUser.isNotEmpty){
print('currentuser is not empty: $currentUser');
return currentUser;
} else {
var message = 'User is empty';
print('currentuser IS empty: $currentUser');
throw message;
}
}catch(e){
print(e.toString());
throw e;
}
}
}
auth.dart
import 'user.dart';
class Auth {
/// private constructor
Auth._();
/// the one and only instance of this singleton
static final instance = Auth._();
//ChatBloc chatBloc = ChatBloc(DatabaseApi.db);
// Create a User instance. Actually it would be better if this is empty so I can notice if a user is valid or not and can react by checking if the user has values and
// if not log the user out later on
User currentUser = User.empty;
}
user.dart
import 'package:equatable/equatable.dart';
/// {#template user}
/// User model
///
/// [User.empty] represents an unauthenticated user.
/// {#endtemplate}
class User extends Equatable {
/// {#macro user}
const User({
required this.id,
this.socketId,
this.userName,
});
/// The current user's scoket id.
final String? socketId;
/// The current user's id.
final int id;
/// The current user's name (display name).
final String? userName;
/// Empty user which represents an unauthenticated user.
static const empty = User(id: 0);
/// Convenience getter to determine whether the current user is empty.
bool get isEmpty => this == User.empty;
/// Convenience getter to determine whether the current user is not empty.
bool get isNotEmpty => this != User.empty;
#override
List<Object?> get props => [id, socketId, userName];
// Convert a user into a Map. The keys must correspond to the names of the
// columns in the database.
Map<String, dynamic> toMap() {
return {
'id': id,
'socketId': socketId,
'userName': userName,
};
}
factory User.fromMap(Map<String, dynamic> map) {
return User(
id: map['id'] as int,
socketId: map['socketId'] as String,
userName: map['userName'] as String,
);
}
// Implement toString to make it easier to see information about
// each user when using the print statement.
#override
String toString() {
return 'User{id: $id, socketId: $socketId, userName: $userName}';
}
}

Answer 1

The issue is In your OnTap Function you can call Event like this. I have checked and It's working as expected.
TextButton(
onPressed: () => {
authBloc.userRepository.signIn(),
context.read<AuthBloc>().add(AppLoaded())
},
child: const Text('Login')),