34 lines
1.1 KiB
Dart
34 lines
1.1 KiB
Dart
import 'package:flutter_bloc/flutter_bloc.dart%20%20';
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import 'package:pmu_labs/presentation/like_bloc/like_event.dart';
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import 'package:pmu_labs/presentation/like_bloc/like_state.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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const String _likedPrefsKey = 'liked';
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class LikeBloc extends Bloc<LikeEvent, LikeState>{
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LikeBloc() : super(const LikeState(likedIds: [])){
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on<ChangeLikeEvent>(_onChangeLike);
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on<LoadLikesEvent>(_onLoadLikes);
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}
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Future<void> _onLoadLikes(LoadLikesEvent event, Emitter<LikeState> emit) async{
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final prefs = await SharedPreferences.getInstance();
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final data = prefs.getStringList(_likedPrefsKey);
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emit(state.copyWith(likedIds: data));
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}
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Future<void> _onChangeLike(ChangeLikeEvent event, Emitter<LikeState> emit) async{
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final updatedList = List<String>.from(state.likedIds ?? []);
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if(updatedList.contains(event.id)){
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updatedList.remove(event.id);
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} else{
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updatedList.add(event.id);
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}
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final prefs = await SharedPreferences.getInstance();
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prefs.setStringList(_likedPrefsKey, updatedList);
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emit(state.copyWith(likedIds: updatedList));
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}
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} |