feat: add background services and map status management

2025-09-24 23:36:55 +08:00
parent 10825171fd
commit 23ab5ec746
10 changed files with 694 additions and 26 deletions
--- a/lib/services/map_state_service.dart
+++ b/lib/services/map_state_service.dart
@@ -0,0 +1,113 @@
+import 'dart:convert';
+import 'package:sqflite/sqflite.dart';
+import 'package:lbjconsole/models/map_state.dart';
+import 'database_service.dart';
+
+class MapStateService {
+  static final MapStateService instance = MapStateService._internal();
+  factory MapStateService() => instance;
+  MapStateService._internal();
+
+  static const String _tableName = 'record_map_states';
+  
+  final Map<String, MapState> _memoryCache = {};
+
+  Future<void> _ensureTableExists() async {
+    final db = await DatabaseService.instance.database;
+    await db.execute('''
+      CREATE TABLE IF NOT EXISTS $_tableName (
+        key TEXT PRIMARY KEY,
+        state TEXT NOT NULL,
+        updated_at INTEGER NOT NULL
+      )
+    ''');
+  }
+
+  String getSingleRecordMapKey(String recordId) {
+    return "${recordId}_record_map";
+  }
+
+  String getMergedRecordMapKey(String groupKey) {
+    return "${groupKey}_group_map";
+  }
+
+  Future<void> saveMapState(String key, MapState state) async {
+    try {
+      _memoryCache[key] = state;
+      
+      final db = await DatabaseService.instance.database;
+      await _ensureTableExists();
+      
+      await db.insert(
+        _tableName,
+        {
+          'key': key,
+          'state': jsonEncode(state.toJson()),
+          'updated_at': DateTime.now().millisecondsSinceEpoch,
+        },
+        conflictAlgorithm: ConflictAlgorithm.replace,
+      );
+    } catch (e) {
+      print('保存地图状态失败: $e');
+    }
+  }
+
+  Future<MapState?> getMapState(String key) async {
+    if (_memoryCache.containsKey(key)) {
+      return _memoryCache[key];
+    }
+
+    try {
+      final db = await DatabaseService.instance.database;
+      await _ensureTableExists();
+      
+      final result = await db.query(
+        _tableName,
+        where: 'key = ?',
+        whereArgs: [key],
+        limit: 1,
+      );
+
+      if (result.isNotEmpty) {
+        final stateJson = jsonDecode(result.first['state'] as String);
+        final state = MapState.fromJson(stateJson);
+        _memoryCache[key] = state;
+        return state;
+      }
+    } catch (e) {
+      print('读取地图状态失败: $e');
+    }
+    
+    return null;
+  }
+
+  Future<void> deleteMapState(String key) async {
+    _memoryCache.remove(key);
+    
+    try {
+      final db = await DatabaseService.instance.database;
+      await db.delete(
+        _tableName,
+        where: 'key = ?',
+        whereArgs: [key],
+      );
+    } catch (e) {
+      print('删除地图状态失败: $e');
+    }
+  }
+
+  Future<void> clearAllMapStates() async {
+    _memoryCache.clear();
+    
+    try {
+      final db = await DatabaseService.instance.database;
+      await db.delete(_tableName);
+    } catch (e) {
+      print('清空地图状态失败: $e');
+    }
+  }
+
+  void clearMemoryCache() {
+    _memoryCache.clear();
+  }
+}