first commit

lib/database/time_goal_dao.dart

@@ -0,0 +1,130 @@
+import 'package:flutter/foundation.dart' show kIsWeb;
+import '../models/time_goal.dart';
+import 'database_helper.dart';
+
+class TimeGoalDao {
+  final DatabaseHelper _dbHelper = DatabaseHelper.instance;
+
+  // Web 平台使用内存存储
+  final List<TimeGoal> _webGoals = [];
+
+  // Web 平台检查
+  bool get _isWeb => kIsWeb;
+
+  // 插入或更新时间目标
+  Future<void> upsertTimeGoal(TimeGoal goal) async {
+    if (_isWeb) {
+      // Web 平台使用内存存储
+      final index = _webGoals.indexWhere((g) => 
+        g.goalType == goal.goalType && g.category == goal.category);
+      if (index >= 0) {
+        _webGoals[index] = goal;
+      } else {
+        _webGoals.add(goal);
+      }
+      return;
+    }
+
+    final db = await _dbHelper.database;
+    final now = DateTime.now().millisecondsSinceEpoch ~/ 1000;
+
+    final map = {
+      'goal_type': goal.goalType,
+      'category': goal.category,
+      'target_time': goal.targetTime,
+      'is_active': goal.isActive ? 1 : 0,
+      'created_at': now,
+      'updated_at': now,
+    };
+
+    // 检查是否已存在相同类型的目标
+    final existing = await db.query(
+      'time_goal',
+      where: 'goal_type = ? AND (category = ? OR category IS NULL)',
+      whereArgs: [
+        goal.goalType,
+        goal.category,
+      ],
+    );
+
+    if (existing.isEmpty) {
+      await db.insert('time_goal', map);
+    } else {
+      await db.update(
+        'time_goal',
+        map,
+        where: 'goal_type = ? AND (category = ? OR category IS NULL)',
+        whereArgs: [
+          goal.goalType,
+          goal.category,
+        ],
+      );
+    }
+  }
+
+  // 获取所有激活的目标
+  Future<List<TimeGoal>> getActiveGoals() async {
+    if (_isWeb) {
+      return _webGoals.where((g) => g.isActive).toList();
+    }
+
+    final db = await _dbHelper.database;
+    final maps = await db.query(
+      'time_goal',
+      where: 'is_active = 1',
+      orderBy: 'goal_type, category',
+    );
+
+    return maps.map((map) => TimeGoal.fromMap(map)).toList();
+  }
+
+  // 获取所有目标（包括非激活的）
+  Future<List<TimeGoal>> getAllGoals() async {
+    if (_isWeb) {
+      return List<TimeGoal>.from(_webGoals);
+    }
+
+    final db = await _dbHelper.database;
+    final maps = await db.query(
+      'time_goal',
+      orderBy: 'goal_type, category',
+    );
+
+    return maps.map((map) => TimeGoal.fromMap(map)).toList();
+  }
+
+  // 获取指定类型的目标
+  Future<TimeGoal?> getGoal(String goalType, {String? category}) async {
+    final db = await _dbHelper.database;
+    final maps = await db.query(
+      'time_goal',
+      where: 'goal_type = ? AND (category = ? OR category IS NULL) AND is_active = 1',
+      whereArgs: [goalType, category],
+    );
+
+    if (maps.isEmpty) return null;
+    return TimeGoal.fromMap(maps.first);
+  }
+
+  // 删除目标
+  Future<void> deleteGoal(int id) async {
+    final db = await _dbHelper.database;
+    await db.delete(
+      'time_goal',
+      where: 'id = ?',
+      whereArgs: [id],
+    );
+  }
+
+  // 停用目标
+  Future<void> deactivateGoal(int id) async {
+    final db = await _dbHelper.database;
+    await db.update(
+      'time_goal',
+      {'is_active': 0, 'updated_at': DateTime.now().millisecondsSinceEpoch ~/ 1000},
+      where: 'id = ?',
+      whereArgs: [id],
+    );
+  }
+}
+