119 lines
3.7 KiB
Dart
119 lines
3.7 KiB
Dart
import 'dart:convert';
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import 'package:flutter/foundation.dart';
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import 'package:patbond_flutter/data/demo_data.dart';
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import 'package:patbond_flutter/models/models.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class AppState extends ChangeNotifier {
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static const _petKey = 'patbond_pet';
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static const _vaccinesKey = 'patbond_vaccines';
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static const _postsKey = 'patbond_posts';
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static const _locationWeatherKey = 'patbond_location_weather';
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PetProfile pet = initialPet;
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VaccineRecord vaccines = initialVaccines;
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List<PostModel> posts = List<PostModel>.from(initialPosts);
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LocationWeather locationWeather = initialLocationWeather;
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bool isReady = false;
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Future<void> load() async {
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try {
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final preferences = await SharedPreferences.getInstance();
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final savedPet = preferences.getString(_petKey);
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final savedVaccines = preferences.getString(_vaccinesKey);
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final savedPosts = preferences.getString(_postsKey);
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final savedLocationWeather = preferences.getString(_locationWeatherKey);
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if (savedPet != null) {
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pet = PetProfile.fromJson(jsonDecode(savedPet) as Map<String, dynamic>);
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}
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if (savedVaccines != null) {
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vaccines = VaccineRecord.fromJson(
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jsonDecode(savedVaccines) as Map<String, dynamic>,
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);
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}
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if (savedPosts != null) {
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posts = (jsonDecode(savedPosts) as List)
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.map((item) => PostModel.fromJson(item as Map<String, dynamic>))
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.toList();
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}
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if (savedLocationWeather != null) {
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locationWeather = LocationWeather.fromJson(
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jsonDecode(savedLocationWeather) as Map<String, dynamic>,
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);
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}
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} catch (error, stackTrace) {
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debugPrint('读取本地数据失败，已使用默认数据：$error\n$stackTrace');
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pet = initialPet;
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vaccines = initialVaccines;
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posts = List<PostModel>.from(initialPosts);
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locationWeather = initialLocationWeather;
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} finally {
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isReady = true;
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notifyListeners();
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}
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}
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Future<void> updatePet(PetProfile value) async {
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pet = value;
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notifyListeners();
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await _save(_petKey, value.toJson());
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}
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Future<void> updateVaccines(VaccineRecord value) async {
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vaccines = value;
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notifyListeners();
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await _save(_vaccinesKey, value.toJson());
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}
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Future<void> updatePost(PostModel value) async {
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final index = posts.indexWhere((post) => post.id == value.id);
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if (index == -1) return;
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posts[index] = value;
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posts = List<PostModel>.from(posts);
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notifyListeners();
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await _savePosts();
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}
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Future<void> publishPost(PostModel value) async {
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posts = [value, ...posts];
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notifyListeners();
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await _savePosts();
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}
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Future<void> updateLocationWeather(LocationWeather value) async {
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locationWeather = value;
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notifyListeners();
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await _save(_locationWeatherKey, value.toJson());
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}
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Future<void> resetDemoData() async {
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pet = initialPet;
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vaccines = initialVaccines;
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posts = List<PostModel>.from(initialPosts);
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locationWeather = initialLocationWeather;
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notifyListeners();
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final preferences = await SharedPreferences.getInstance();
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await Future.wait([
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preferences.remove(_petKey),
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preferences.remove(_vaccinesKey),
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preferences.remove(_postsKey),
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preferences.remove(_locationWeatherKey),
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]);
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}
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Future<void> _savePosts() {
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return _save(_postsKey, posts.map((post) => post.toJson()).toList());
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}
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Future<void> _save(String key, Object value) async {
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try {
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final preferences = await SharedPreferences.getInstance();
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await preferences.setString(key, jsonEncode(value));
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} catch (error, stackTrace) {
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debugPrint('保存本地数据失败：$error\n$stackTrace');
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}
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}
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}
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