48 lines
1.4 KiB
Dart
48 lines
1.4 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'package:aesthetica_wallpaper/models/recipe.dart';
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class RecipeProvider with ChangeNotifier {
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final String _storageKey = "aesthetica_recipes";
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List<Recipe> _recipes = [];
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List<Recipe> get recipes => _recipes;
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// 从 SharedPreferences 加载配方
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Future<void> loadRecipes() async {
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final prefs = await SharedPreferences.getInstance();
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final List<String> recipeStrings = prefs.getStringList(_storageKey) ?? [];
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_recipes = recipeStrings
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.map((str) => Recipe.fromJsonString(str))
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.toList()
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.reversed
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.toList(); // 反转，让最新的在最前面
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notifyListeners();
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}
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// 保存所有配方到 SharedPreferences
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Future<void> _save() async {
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final prefs = await SharedPreferences.getInstance();
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final List<String> recipeStrings = _recipes
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.map((r) => r.toJsonString())
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.toList();
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await prefs.setStringList(_storageKey, recipeStrings);
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}
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// 添加一个新配方
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Future<void> addRecipe(Recipe recipe) async {
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// 确保 ID 是唯一的
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recipe.id = DateTime.now().millisecondsSinceEpoch.toString();
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_recipes.insert(0, recipe); // 插入到最前面
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await _save();
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notifyListeners();
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}
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// 删除一个配方
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Future<void> deleteRecipe(String id) async {
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_recipes.removeWhere((r) => r.id == id);
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await _save();
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notifyListeners();
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}
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}
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