40 lines
834 B
Dart
40 lines
834 B
Dart
import 'dart:async';
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import 'package:rxdart/rxdart.dart';
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class PackHolder {
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final StreamController<PackState> _streamController =
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StreamController.broadcast();
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PackState _state;
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PackHolder() : _state = PackState.empty;
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void setPacksWithCards(
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Iterable<String> packs,
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) {
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_state = PackState(packs.toSet());
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_streamController.add(_state);
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}
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void removePackWithCards(String id) =>
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setPacksWithCards(state.packsWithCards.toList()..remove(id));
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void clear() {
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_state = PackState.empty;
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_streamController.add(_state);
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}
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PackState get state => _state;
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Stream<PackState> get asStream => _streamController.stream.startWith(_state);
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}
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class PackState {
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final Set<String> packsWithCards;
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static const empty = PackState({});
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const PackState(
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this.packsWithCards,
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);
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}
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