reversible_bloc

A Bloc mixin that enables to revert the bloc / cubit to a previous state.

Setup

Add dependency to your pubspec.yaml

dependencies:
  reversible_bloc : ^0.0.2

Run pub get to install.

Usage

To use reversible_bloc, you need to import and mix ReversibleBlocMixin to your Bloc or Cubit.

import 'package:reversible_bloc/reversible_bloc.dart';

class MyReversibleCubit extends Cubit<int> with ReversibleBlocMixin {
  MyReversibleCubit(int initialState) : super(initialState);

  void changeValue(int newValue) => emit(newValue);
}

Then, when you need to rollback to previous state, you can use revert() method. If bloc has no previous state, it will throw an EmptyStackException.

final myReversibleCubit = context.read<MyReversibleCubit>();
myReversibleCubit.changeValue(2);
myReversibleCubit.changeValue(4);
// Current state is 4
myReversibleCubit.revert();
// Current state back to 2
myReversibleCubit.revert();
// Current state back to initial state
myReversibleCubit.revert();
// throws EmptyStackException

How to contribute

Feel free to add sugestions and report bugs in Issues page. PRs are welcomed too.

Maintainers

• Guilherme Gabanelli