去除自动备份代码

lib/services/sync/auto_backup_service.dart

@@ -1,237 +0,0 @@
-import 'dart:async';
-import 'dart:io';
-import 'package:flutter/foundation.dart';
-import 'package:path_provider/path_provider.dart';
-import 'package:path/path.dart' as path;
-import 'package:shared_preferences/shared_preferences.dart';
-import 'backup_service.dart';
-
-/// 自动备份服务 - 定时自动备份到下载目录
-class AutoBackupService {
-  static final AutoBackupService instance = AutoBackupService._init();
-  
-  AutoBackupService._init();
-  
-  Timer? _timer;
-  bool _isRunning = false;
-  
-  static const String _prefsKey = 'auto_backup_enabled';
-  static const String _backupDirName = 'mooknote';
-  static const int _maxBackups = 5;
-  static const Duration _backupInterval = Duration(minutes: 5);
-  
-  /// 是否正在运行
-  bool get isRunning => _isRunning;
-  
-  /// 获取自动备份状态
-  Future<bool> getEnabled() async {
-    final prefs = await SharedPreferences.getInstance();
-    return prefs.getBool(_prefsKey) ?? false;
-  }
-  
-  /// 设置自动备份状态
-  Future<void> setEnabled(bool enabled) async {
-    final prefs = await SharedPreferences.getInstance();
-    await prefs.setBool(_prefsKey, enabled);
-    
-    if (enabled) {
-      await start();
-    } else {
-      await stop();
-    }
-  }
-  
-  /// 启动自动备份
-  Future<void> start() async {
-    if (_isRunning) return;
-
-    _isRunning = true;
-
-    // 立即执行一次备份
-    await _performBackup();
-
-    // 启动定时器
-    _timer = Timer.periodic(_backupInterval, (_) async {
-      await _performBackup();
-    });
-  }
-  
-  /// 停止自动备份
-  Future<void> stop() async {
-    _timer?.cancel();
-    _timer = null;
-    _isRunning = false;
-  }
-  
-  /// 执行备份
-  Future<void> _performBackup() async {
-    try {
-      final backupDir = await _getBackupDirectory();
-      if (backupDir == null) {
-        debugPrint('AutoBackup: 无法获取备份目录');
-        return;
-      }
-      
-      // 确保备份目录存在
-      if (!await backupDir.exists()) {
-        await backupDir.create(recursive: true);
-      }
-      
-      // 导出数据
-      final result = await BackupService.instance.exportDataForAutoBackup();
-
-      if (!result.success || result.zipPath == null) {
-        debugPrint('AutoBackup: 导出失败 - ${result.errorMessage}');
-        return;
-      }
-
-      // 生成备份文件名
-      final fileName = 'auto_backup_${_formatDateTime(DateTime.now())}.zip';
-      final backupFile = File(path.join(backupDir.path, fileName));
-
-      // 移动临时 zip 到备份目录
-      final tempFile = File(result.zipPath!);
-      await tempFile.rename(backupFile.path);
-
-      debugPrint('AutoBackup: 备份成功 - ${backupFile.path}');
-      
-      // 清理旧备份，只保留最新的5个
-      await _cleanupOldBackups(backupDir);
-      
-    } catch (e) {
-      debugPrint('AutoBackup: 备份失败 - $e');
-    }
-  }
-  
-  /// 获取备份目录（下载目录/mooknote）
-  Future<Directory?> _getBackupDirectory() async {
-    try {
-      if (Platform.isAndroid) {
-        // 优先级 1: 官方 API 获取下载目录
-        try {
-          final dirs = await getExternalStorageDirectories(
-            type: StorageDirectory.downloads,
-          );
-          if (dirs != null && dirs.isNotEmpty) {
-            return Directory('${dirs.first.path}/$_backupDirName');
-          }
-        } catch (_) {}
-
-        // 优先级 2: 标准路径直接拼
-        final standardPath = '/storage/emulated/0/Download/$_backupDirName';
-        final standardDir = Directory(standardPath);
-        if (await standardDir.parent.exists()) {
-          return standardDir;
-        }
-
-        // 优先级 3: 从外部存储路径推导（旧逻辑兜底）
-        final externalDir = await getExternalStorageDirectory();
-        if (externalDir != null) {
-          final segments = externalDir.uri.pathSegments;
-          if (segments.length >= 3) {
-            final pkg = segments[segments.length - 3];
-            final downloadPath = externalDir.path.replaceAll(
-              '/Android/data/$pkg/files',
-              '/Download',
-            );
-            return Directory('$downloadPath/$_backupDirName');
-          }
-        }
-
-        // 优先级 4: 降级到 app 内部目录
-        final appDir = await getApplicationDocumentsDirectory();
-        return Directory('${appDir.path}/$_backupDirName');
-
-      } else if (Platform.isIOS) {
-        final docDir = await getApplicationDocumentsDirectory();
-        return Directory('${docDir.path}/$_backupDirName');
-      } else {
-        // 桌面端
-        final home = Platform.environment['HOME'] ?? Platform.environment['USERPROFILE'];
-        if (home != null) {
-          return Directory('$home/Downloads/$_backupDirName');
-        }
-        final docDir = await getApplicationDocumentsDirectory();
-        return Directory('${docDir.path}/$_backupDirName');
-      }
-    } catch (e) {
-      debugPrint('AutoBackup: 获取备份目录失败 - $e');
-      return null;
-    }
-  }
-  
-  /// 清理旧备份，只保留最新的5个
-  Future<void> _cleanupOldBackups(Directory backupDir) async {
-    try {
-      final files = await backupDir
-          .list()
-          .where((entity) => entity is File && entity.path.endsWith('.zip'))
-          .cast<File>()
-          .toList();
-      
-      // 按修改时间排序（最新的在前）
-      files.sort((a, b) {
-        final aStat = a.statSync();
-        final bStat = b.statSync();
-        return bStat.modified.compareTo(aStat.modified);
-      });
-      
-      // 删除超过10个的旧备份
-      if (files.length > _maxBackups) {
-        for (var i = _maxBackups; i < files.length; i++) {
-          try {
-            await files[i].delete();
-            debugPrint('AutoBackup: 删除旧备份 - ${files[i].path}');
-          } catch (e) {
-            debugPrint('AutoBackup: 删除旧备份失败 - $e');
-          }
-        }
-      }
-    } catch (e) {
-      debugPrint('AutoBackup: 清理旧备份失败 - $e');
-    }
-  }
-  
-  /// 获取备份文件列表
-  Future<List<File>> getBackupFiles() async {
-    try {
-      final backupDir = await _getBackupDirectory();
-      if (backupDir == null || !await backupDir.exists()) {
-        return [];
-      }
-      
-      final files = await backupDir
-          .list()
-          .where((entity) => entity is File && entity.path.endsWith('.zip'))
-          .cast<File>()
-          .toList();
-      
-      // 按修改时间排序（最新的在前）
-      files.sort((a, b) {
-        final aStat = a.statSync();
-        final bStat = b.statSync();
-        return bStat.modified.compareTo(aStat.modified);
-      });
-      
-      return files;
-    } catch (e) {
-      debugPrint('AutoBackup: 获取备份列表失败 - $e');
-      return [];
-    }
-  }
-  
-  /// 获取备份目录路径
-  Future<String?> getBackupDirectoryPath() async {
-    final dir = await _getBackupDirectory();
-    return dir?.path;
-  }
-  
-  /// 格式化日期时间用于文件名
-  String _formatDateTime(DateTime dateTime) {
-    return '${dateTime.year}${_pad(dateTime.month)}${_pad(dateTime.day)}_${_pad(dateTime.hour)}${_pad(dateTime.minute)}${_pad(dateTime.second)}';
-  }
-  
-  String _pad(int number) {
-    return number.toString().padLeft(2, '0');
-  }
-}