[flutter_timer] Timer Actions

main.dart

class Actions extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Row(
      mainAxisAlignment: MainAxisAlignment.spaceEvenly,
      children: _mapStateToActionButtons(
        timerBloc: BlocProvider.of<TimerBloc>(context),
      ),
    );
  }

  List<Widget> _mapStateToActionButtons({
    TimerBloc timerBloc,
  }) {
    final TimerState state = timerBloc.currentState;
    if (state is Ready) {
      return [
        FloatingActionButton(
          child: Icon(Icons.play_arrow),
          onPressed: () => timerBloc.dispatch(Start(duration: state.duration)),
        ),
      ];
    }
    if (state is Running) {
      return [
        FloatingActionButton(
          child: Icon(Icons.pause),
          onPressed: () => timerBloc.dispatch(Pause()),
        ),
        FloatingActionButton(
          child: Icon(Icons.replay),
          onPressed: () => timerBloc.dispatch(Reset()),
        ),
      ];
    }
    if (state is Paused) {
      return [
        FloatingActionButton(
          child: Icon(Icons.play_arrow),
          onPressed: () => timerBloc.dispatch(Resume()),
        ),
        FloatingActionButton(
          child: Icon(Icons.replay),
          onPressed: () => timerBloc.dispatch(Reset()),
        ),
      ];
    }
    if (state is Finished) {
      return [
        FloatingActionButton(
          child: Icon(Icons.replay),
          onPressed: () => timerBloc.dispatch(Reset()),
        ),
      ];
    }
    return [];
  }
}