67 lines
1.8 KiB
Dart
67 lines
1.8 KiB
Dart
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import 'package:flutter_bloc/flutter_bloc.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import '../../../home/domain/entities/site_entity.dart';
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class SiteState {
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final List<SiteEntity> sites;
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final SiteEntity? selectedSite;
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const SiteState({
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this.sites = const [],
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this.selectedSite,
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});
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SiteState copyWith({
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List<SiteEntity>? sites,
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SiteEntity? selectedSite,
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}) {
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return SiteState(
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sites: sites ?? this.sites,
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selectedSite: selectedSite ?? this.selectedSite,
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);
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}
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}
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class SiteCubit extends Cubit<SiteState> {
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final SharedPreferences sharedPreferences;
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static const String _selectedSiteIdKey = 'selected_site_id';
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SiteCubit(this.sharedPreferences) : super(const SiteState());
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/// 更新场站列表
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void updateSites(List<SiteEntity> sites) {
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// 尝试恢复之前选中的场站
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final savedSiteId = sharedPreferences.getInt(_selectedSiteIdKey);
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SiteEntity? selectedSite;
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if (savedSiteId != null && sites.isNotEmpty) {
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selectedSite = sites.firstWhere(
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(site) => site.id == savedSiteId,
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orElse: () => sites.first,
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);
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} else if (sites.isNotEmpty) {
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selectedSite = sites.first;
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}
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emit(state.copyWith(sites: sites, selectedSite: selectedSite));
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}
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/// 选择场站（持久化）
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void selectSite(SiteEntity site) {
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sharedPreferences.setInt(_selectedSiteIdKey, site.id);
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emit(state.copyWith(selectedSite: site));
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}
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/// 清除选中场站
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void clearSelectedSite() {
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sharedPreferences.remove(_selectedSiteIdKey);
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emit(state.copyWith(selectedSite: null));
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}
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/// 清空所有场站数据（退出登录时调用）
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void clearAll() {
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sharedPreferences.remove(_selectedSiteIdKey);
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emit(const SiteState());
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}
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}
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