import 'dart:async';

import 'package:mnemo_cards_common/mnemo_cards_common.dart';
import 'package:rxdart/rxdart.dart';

class PackHolder {
  final StreamController<PackState?> _streamController =
      StreamController.broadcast();
  PackState? _state;

  PackHolder();

  void setPacks(List<CardPackDto> packs) {
    _state = PackState(
      packs,
    );
    _streamController.add(_state);
  }

  void clear() {
    _state = null;
    _streamController.add(_state);
  }

  PackState? get state => _state;

  Stream<PackState?> get asStream => _streamController.stream.startWith(_state);
}

class PackState {
  final List<CardPackDto> packsWithCards;

  PackState(this.packsWithCards);
}