first commit

lib/database/daily_stats_dao.dart

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+import 'package:flutter/foundation.dart' show kIsWeb;
+import '../models/daily_stats.dart';
+import 'database_helper.dart';
+
+class DailyStatsDao {
+  final DatabaseHelper _dbHelper = DatabaseHelper.instance;
+
+  // Web 平台检查
+  bool get _isWeb => kIsWeb;
+
+  // 插入或更新每日统计
+  Future<void> upsertDailyStats(DailyStats stats) async {
+    final db = await _dbHelper.database;
+    final dateStr = _formatDate(stats.date);
+    final map = stats.toMap();
+    
+    final existing = await db.query(
+      'daily_stats',
+      where: 'date = ?',
+      whereArgs: [dateStr],
+    );
+
+    if (existing.isEmpty) {
+      await db.insert('daily_stats', map);
+    } else {
+      await db.update(
+        'daily_stats',
+        map,
+        where: 'date = ?',
+        whereArgs: [dateStr],
+      );
+    }
+  }
+
+  // 获取指定日期的统计
+  Future<DailyStats?> getDailyStats(DateTime date) async {
+    final db = await _dbHelper.database;
+    final dateStr = _formatDate(date);
+
+    final maps = await db.query(
+      'daily_stats',
+      where: 'date = ?',
+      whereArgs: [dateStr],
+    );
+
+    if (maps.isEmpty) return null;
+
+    return _mapToDailyStats(maps.first);
+  }
+
+  // 获取今日统计
+  Future<DailyStats?> getTodayStats() async {
+    return await getDailyStats(DateTime.now());
+  }
+
+  // 获取指定日期范围的统计
+  Future<List<DailyStats>> getStatsRange({
+    required DateTime startDate,
+    required DateTime endDate,
+  }) async {
+    if (_isWeb) return [];
+    
+    final db = await _dbHelper.database;
+    final startStr = _formatDate(startDate);
+    final endStr = _formatDate(endDate);
+
+    final maps = await db.query(
+      'daily_stats',
+      where: 'date >= ? AND date <= ?',
+      whereArgs: [startStr, endStr],
+      orderBy: 'date ASC',
+    );
+
+    return maps.map((map) => _mapToDailyStats(map)).toList();
+  }
+
+  // 获取本周统计
+  Future<List<DailyStats>> getWeekStats() async {
+    final now = DateTime.now();
+    final startOfWeek = now.subtract(Duration(days: now.weekday - 1));
+    final endOfWeek = startOfWeek.add(const Duration(days: 6));
+    return await getStatsRange(startDate: startOfWeek, endDate: endOfWeek);
+  }
+
+  // 获取本月统计
+  Future<List<DailyStats>> getMonthStats() async {
+    final now = DateTime.now();
+    final startOfMonth = DateTime(now.year, now.month, 1);
+    final endOfMonth = DateTime(now.year, now.month + 1, 0);
+    return await getStatsRange(startDate: startOfMonth, endDate: endOfMonth);
+  }
+
+  // 删除指定日期之前的数据
+  Future<void> deleteBeforeDate(DateTime date) async {
+    if (_isWeb) return;
+    
+    final db = await _dbHelper.database;
+    final dateStr = _formatDate(date);
+    await db.delete(
+      'daily_stats',
+      where: 'date < ?',
+      whereArgs: [dateStr],
+    );
+  }
+
+  // 删除指定 ID 的统计
+  Future<void> deleteDailyStats(int id) async {
+    if (_isWeb) return;
+    
+    final db = await _dbHelper.database;
+    await db.delete(
+      'daily_stats',
+      where: 'id = ?',
+      whereArgs: [id],
+    );
+  }
+
+  String _formatDate(DateTime date) {
+    return '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
+  }
+
+  DailyStats _mapToDailyStats(Map<String, dynamic> map) {
+    return DailyStats(
+      id: map['id'] as int?,
+      date: DateTime.parse(map['date'] as String),
+      totalTime: map['total_time'] as int,
+      workTime: map['work_time'] as int? ?? 0,
+      studyTime: map['study_time'] as int? ?? 0,
+      entertainmentTime: map['entertainment_time'] as int? ?? 0,
+      socialTime: map['social_time'] as int? ?? 0,
+      toolTime: map['tool_time'] as int? ?? 0,
+      efficiencyScore: map['efficiency_score'] as int?,
+      focusScore: map['focus_score'] as int?,
+      appSwitchCount: map['app_switch_count'] as int? ?? 0,
+      createdAt: DateTime.fromMillisecondsSinceEpoch((map['created_at'] as int) * 1000),
+      updatedAt: DateTime.fromMillisecondsSinceEpoch((map['updated_at'] as int) * 1000),
+    );
+  }
+}
+
+// 扩展 DailyStats 模型，添加 toMap 方法
+extension DailyStatsExtension on DailyStats {
+  Map<String, dynamic> toMap() {
+    return {
+      'id': id,
+      'date': _formatDate(date),
+      'total_time': totalTime,
+      'work_time': workTime,
+      'study_time': studyTime,
+      'entertainment_time': entertainmentTime,
+      'social_time': socialTime,
+      'tool_time': toolTime,
+      'efficiency_score': efficiencyScore,
+      'focus_score': focusScore,
+      'app_switch_count': appSwitchCount,
+      'created_at': createdAt.millisecondsSinceEpoch ~/ 1000,
+      'updated_at': updatedAt.millisecondsSinceEpoch ~/ 1000,
+    };
+  }
+
+  String _formatDate(DateTime date) {
+    return '${date.year}-${date.month.toString().padLeft(2, '0')}-${date.day.toString().padLeft(2, '0')}';
+  }
+}
+