新增静态演示界面

2026-07-21 17:41:01 +08:00
parent 030b11fe67
commit b9d7c9f2ee
23 changed files with 4215 additions and 144 deletions
@@ -0,0 +1,118 @@
+import 'dart:convert';
+
+import 'package:flutter/foundation.dart';
+import 'package:patbond_flutter/data/demo_data.dart';
+import 'package:patbond_flutter/models/models.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+
+class AppState extends ChangeNotifier {
+  static const _petKey = 'patbond_pet';
+  static const _vaccinesKey = 'patbond_vaccines';
+  static const _postsKey = 'patbond_posts';
+  static const _locationWeatherKey = 'patbond_location_weather';
+
+  PetProfile pet = initialPet;
+  VaccineRecord vaccines = initialVaccines;
+  List<PostModel> posts = List<PostModel>.from(initialPosts);
+  LocationWeather locationWeather = initialLocationWeather;
+  bool isReady = false;
+
+  Future<void> load() async {
+    try {
+      final preferences = await SharedPreferences.getInstance();
+      final savedPet = preferences.getString(_petKey);
+      final savedVaccines = preferences.getString(_vaccinesKey);
+      final savedPosts = preferences.getString(_postsKey);
+      final savedLocationWeather = preferences.getString(_locationWeatherKey);
+
+      if (savedPet != null) {
+        pet = PetProfile.fromJson(jsonDecode(savedPet) as Map<String, dynamic>);
+      }
+      if (savedVaccines != null) {
+        vaccines = VaccineRecord.fromJson(
+          jsonDecode(savedVaccines) as Map<String, dynamic>,
+        );
+      }
+      if (savedPosts != null) {
+        posts = (jsonDecode(savedPosts) as List)
+            .map((item) => PostModel.fromJson(item as Map<String, dynamic>))
+            .toList();
+      }
+      if (savedLocationWeather != null) {
+        locationWeather = LocationWeather.fromJson(
+          jsonDecode(savedLocationWeather) as Map<String, dynamic>,
+        );
+      }
+    } catch (error, stackTrace) {
+      debugPrint('读取本地数据失败，已使用默认数据：$error\n$stackTrace');
+      pet = initialPet;
+      vaccines = initialVaccines;
+      posts = List<PostModel>.from(initialPosts);
+      locationWeather = initialLocationWeather;
+    } finally {
+      isReady = true;
+      notifyListeners();
+    }
+  }
+
+  Future<void> updatePet(PetProfile value) async {
+    pet = value;
+    notifyListeners();
+    await _save(_petKey, value.toJson());
+  }
+
+  Future<void> updateVaccines(VaccineRecord value) async {
+    vaccines = value;
+    notifyListeners();
+    await _save(_vaccinesKey, value.toJson());
+  }
+
+  Future<void> updatePost(PostModel value) async {
+    final index = posts.indexWhere((post) => post.id == value.id);
+    if (index == -1) return;
+    posts[index] = value;
+    posts = List<PostModel>.from(posts);
+    notifyListeners();
+    await _savePosts();
+  }
+
+  Future<void> publishPost(PostModel value) async {
+    posts = [value, ...posts];
+    notifyListeners();
+    await _savePosts();
+  }
+
+  Future<void> updateLocationWeather(LocationWeather value) async {
+    locationWeather = value;
+    notifyListeners();
+    await _save(_locationWeatherKey, value.toJson());
+  }
+
+  Future<void> resetDemoData() async {
+    pet = initialPet;
+    vaccines = initialVaccines;
+    posts = List<PostModel>.from(initialPosts);
+    locationWeather = initialLocationWeather;
+    notifyListeners();
+    final preferences = await SharedPreferences.getInstance();
+    await Future.wait([
+      preferences.remove(_petKey),
+      preferences.remove(_vaccinesKey),
+      preferences.remove(_postsKey),
+      preferences.remove(_locationWeatherKey),
+    ]);
+  }
+
+  Future<void> _savePosts() {
+    return _save(_postsKey, posts.map((post) => post.toJson()).toList());
+  }
+
+  Future<void> _save(String key, Object value) async {
+    try {
+      final preferences = await SharedPreferences.getInstance();
+      await preferences.setString(key, jsonEncode(value));
+    } catch (error, stackTrace) {
+      debugPrint('保存本地数据失败：$error\n$stackTrace');
+    }
+  }
+}