replay_cubit 0.3.0-dev.1

An extension to the cubit state management library which adds support for undo and redo.

An extension to the cubit state management library which adds support for undo and redo.

Creating a ReplayCubit

class CounterCubit extends ReplayCubit<int> {
  CounterCubit() : super(0);

  void increment() => emit(state + 1);
}

Using a ReplayCubit

void main() {
  final cubit = CounterCubit();

  // trigger a state change
  cubit.increment();
  print(cubit.state); // 1

  // undo the change
  cubit.undo();
  print(cubit.state); // 0

  // redo the change
  cubit.redo();
  print(cubit.state); // 1
}

ReplayMixin

If you wish to be able to use a ReplayCubit in conjuction with a different type of cubit like HydratedCubit, you can use the ReplayMixin.

class CounterCubit extends HydratedCubit<int> with ReplayMixin<int> {
  CounterCubit() : super(0);

  void increment() => emit(state + 1);
  void decrement() => emit(state - 1);

  @override
  int fromJson(Map<String, dynamic> json) => json['value'] as int;

  @override
  Map<String, int> toJson(int state) => {'value': state};
}

Dart Versions

• Dart 2: >= 2.7.0

Maintainers

• Felix Angelov

Supporters

Starware

ReplayCubit is Starware.
This means you're free to use the project, as long as you star its GitHub repository.
Your appreciation makes us grow and glow up. ⭐