import 'dart:async';

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

class PreviewPackHolder {
  final StreamController<PreviewPackState?> _streamController =
      StreamController.broadcast();
  PreviewPackState? _state;

  PreviewPackHolder();

  void setPreviewPacks(List<CardPackPreviewDto> packs) {
    _state = PreviewPackState(packs);
    _streamController.add(_state);
  }

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

  PreviewPackState? get state => _state;

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

class PreviewPackState {
  final List<CardPackPreviewDto> previewPacks;

  PreviewPackState(this.previewPacks);
}