49 lines
1.6 KiB
Dart
49 lines
1.6 KiB
Dart
import 'dart:convert';
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import 'package:shared_preferences/shared_preferences.dart';
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import '../kt_model/kt_goods_bean.dart';
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class KtPurchaseRestoreUtil {
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static final KtPurchaseRestoreUtil _instance = KtPurchaseRestoreUtil._internal();
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factory KtPurchaseRestoreUtil() => _instance;
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KtPurchaseRestoreUtil._internal();
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static const String _cacheKey = 'restore_goods_list';
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/// 保存失败的goods到本地缓存
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Future<void> cacheFailedGoods(KtGoodsBean goods) async {
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final prefs = await SharedPreferences.getInstance();
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List<String> goodsList = prefs.getStringList(_cacheKey) ?? [];
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goodsList.add(json.encode(goods.toJson()));
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print('-----goods.toJson:${goods.toJson()}');
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await prefs.setStringList(_cacheKey, goodsList);
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}
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/// 读取本地缓存的goods列表
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Future<List<KtGoodsBean>> getCachedGoodsList() async {
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final prefs = await SharedPreferences.getInstance();
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List<String> goodsList = prefs.getStringList(_cacheKey) ?? [];
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return goodsList.map((e) => KtGoodsBean.fromJson(json.decode(e))).toList();
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}
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/// 清除本地缓存
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Future<void> clearCachedGoods() async {
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final prefs = await SharedPreferences.getInstance();
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await prefs.remove(_cacheKey);
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}
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/// 移除指定goods
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Future<void> removeGoods(KtGoodsBean goods) async {
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final prefs = await SharedPreferences.getInstance();
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List<String> goodsList = prefs.getStringList(_cacheKey) ?? [];
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goodsList.removeWhere((e) {
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final g = KtGoodsBean.fromJson(json.decode(e));
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return g.id == goods.id;
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});
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await prefs.setStringList(_cacheKey, goodsList);
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}
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}
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