controller_pubsub

Description:

controller pubsub

A Flutter package providing a simple implementation of the Publisher-Subscriber pattern for controllers. This package is designed to facilitate communication between controllers.
Features #


Controller Listener: A mixin class that allows classes to listen to controller notifications.


Controller Publisher: A mixin class that provides a mechanism for subscribing to a controller.


Controller Watcher: A singleton class that acts as the central hub for managing controller notifications.


Getting started #


Add the dependency to your pubspec.yaml file:
dependencies:
controller_pubsub: ^0.0.3
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Usage #
Include short and useful examples for package users. Add longer examples
to /example folder.
/// This is a sample of how to use the [ControllerPublisher] mixin class.
class AuthBloc extends Bloc<AuthEvent, AuthState>
with ControllerPublisher<AuthBloc> {
final IAuthRepository _authRepository;
AuthBloc(this._authRepository) : super(const AuthState.initial()) {
on<AuthEvent>(
(event, emit) async {
await event.map(
authCheckRequested: (e) async {
final result = await _authRepository.isSignIn();
emit(
result
? const AuthState.authenticated()
: const AuthState.initial(),
);
if (result) {
notifySubscribers('Hi there!'); // This will notify all subscribers of this controller.
}
},
);
},
);
}
}
/// This is a sample of how to use the [ControllerListener] mixin class.
class LogInBloc extends Bloc<LogInEvent, LogInState>
with ControllerSubscriber<AuthBloc> {

@override
void handleNotification([value]) {
print(value); // This will print 'Hi there!' when the [AuthBloc] notifies this controller.
super.handleNotification(value);
}

@override
LogInBloc(this._signInRepository) : super(LogInState.initial()) {
addListener(this); // Don't forget to add the listener to the controller.
....
}

@override
Future<void> close() {
removeListener(this); // Don't forget to remove the listener from the controller.
return super.close();
}
}

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Additional information #
This package serves as a helper when you need to listen to one BLoC in another BLoC and perform actions when the state changes.