功能优化

lib/services/sync/cache_cleaner.dart

@@ -0,0 +1,238 @@
+import 'dart:io';
+import 'package:flutter/material.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:path/path.dart' as path;
+import '../../providers/app_provider.dart';
+import '../../data/database_helper.dart';
+
+/// 缓存清理服务
+class CacheCleaner {
+  CacheCleaner._();
+  static final CacheCleaner instance = CacheCleaner._();
+
+  /// 执行完整缓存清理，返回各分类删除数量
+  Future<CacheCleanResult> clean(AppProvider provider) async {
+    final dbImagePaths = await _getAllDbImagePaths(provider);
+    final deletedImages = await _cleanImageDirectory(dbImagePaths);
+    final deletedEpubs = await _cleanOrphanedEpubBooks(provider);
+    final deletedTemp = await _cleanTempDirectory();
+    final deletedEmptyDirs = await _cleanEmptyDirectories();
+    return CacheCleanResult(
+      images: deletedImages,
+      epubs: deletedEpubs,
+      temp: deletedTemp,
+      emptyDirs: deletedEmptyDirs,
+    );
+  }
+
+  Future<Set<String>> _getAllDbImagePaths(AppProvider provider) async {
+    final paths = <String>{};
+    for (final movie in provider.movies) {
+      if (movie.posterPath?.isNotEmpty == true) paths.add(movie.posterPath!);
+    }
+    for (final book in provider.books) {
+      if (book.coverPath?.isNotEmpty == true) paths.add(book.coverPath!);
+    }
+    for (final note in provider.notes) {
+      for (final p in note.images) {
+        if (p.isNotEmpty) paths.add(p);
+      }
+    }
+    for (final movieId in provider.movies.map((m) => m.id)) {
+      for (final poster in await provider.getMoviePosters(movieId)) {
+        if (poster.posterPath.isNotEmpty) paths.add(poster.posterPath);
+      }
+    }
+    for (final game in provider.games) {
+      if (game.coverPath?.isNotEmpty == true) paths.add(game.coverPath!);
+    }
+    for (final gameId in provider.games.map((g) => g.id)) {
+      for (final screenshot in await provider.getGameScreenshots(gameId)) {
+        if (screenshot.screenshotPath.isNotEmpty) paths.add(screenshot.screenshotPath);
+      }
+    }
+    return paths;
+  }
+
+  Future<int> _cleanImageDirectory(Set<String> dbImagePaths) async {
+    int deletedCount = 0;
+    try {
+      final appDir = await getApplicationDocumentsDirectory();
+      final imagesDir = Directory('${appDir.path}/images');
+      if (!await imagesDir.exists()) return 0;
+      await for (final entity in imagesDir.list(recursive: true, followLinks: false)) {
+        if (entity is File &&
+            !dbImagePaths.contains(entity.path) &&
+            !path.basename(entity.path).startsWith('avatar')) {
+          try {
+            await entity.delete();
+            deletedCount++;
+          } catch (_) {}
+        }
+      }
+    } catch (e) {
+      debugPrint('清理图片目录失败: $e');
+    }
+    return deletedCount;
+  }
+
+  Future<int> _cleanOrphanedEpubBooks(AppProvider provider) async {
+    int deletedCount = 0;
+    try {
+      final db = await DatabaseHelper.instance.database;
+      final rows = await db.query('reader_books', columns: ['id', 'file_path', 'cover_path', 'is_deleted']);
+      final usedDirs = <String>{};
+      for (final r in rows) {
+        final isDeleted = r['is_deleted'] == 1 || r['is_deleted'] == true;
+        if (isDeleted) continue;
+        final id = r['id'] as String?;
+        if (id != null && id.isNotEmpty) usedDirs.add(id);
+        _collectEpubDirName(r['file_path'] as String?, usedDirs);
+        _collectEpubDirName(r['cover_path'] as String?, usedDirs);
+      }
+
+      final appDir = await getApplicationDocumentsDirectory();
+      final possiblePaths = [
+        '${appDir.path}/epub_books',
+        '/data/user/0/top.iletter.mooknote/app_flutter/epub_books',
+      ];
+
+      for (final epubPath in possiblePaths) {
+        final epubDir = Directory(epubPath);
+        if (!await epubDir.exists()) continue;
+        await for (final entity in epubDir.list(followLinks: false)) {
+          if (entity is Directory) {
+            final dirName = path.basename(entity.path);
+            if (!usedDirs.contains(dirName)) {
+              try {
+                await entity.delete(recursive: true);
+                deletedCount++;
+              } catch (_) {}
+            }
+          }
+        }
+      }
+    } catch (e) {
+      debugPrint('清理 epub_books 目录失败: $e');
+    }
+    return deletedCount;
+  }
+
+  void _collectEpubDirName(String? pathStr, Set<String> dirs) {
+    if (pathStr == null || pathStr.isEmpty) return;
+    final marker = '/epub_books/';
+    final idx = pathStr.indexOf(marker);
+    if (idx < 0) return;
+    final rest = pathStr.substring(idx + marker.length);
+    final slashIdx = rest.indexOf('/');
+    dirs.add(slashIdx >= 0 ? rest.substring(0, slashIdx) : rest);
+  }
+
+  Future<int> _cleanTempDirectory() async {
+    int deletedCount = 0;
+    final now = DateTime.now();
+
+    try {
+      final tempDir = await getTemporaryDirectory();
+      if (await tempDir.exists()) {
+        await for (final entity in tempDir.list(followLinks: false)) {
+          if (entity is File) {
+            final name = path.basename(entity.path);
+            if (name.startsWith('book_poster_') ||
+                name.startsWith('movie_poster_') ||
+                name.startsWith('note_share_') ||
+                name.startsWith('mooknote_download') ||
+                name.startsWith('mooknote_bidir')) {
+              try {
+                final stat = await entity.stat();
+                if (now.difference(stat.modified).inHours >= 1) {
+                  await entity.delete();
+                  deletedCount++;
+                }
+              } catch (_) {}
+            }
+          }
+        }
+      }
+    } catch (e) {
+      debugPrint('清理临时目录失败: $e');
+    }
+
+    try {
+      final cacheDir = await getApplicationCacheDirectory();
+      if (await cacheDir.exists()) {
+        await for (final entity in cacheDir.list(recursive: true, followLinks: false)) {
+          if (entity is File) {
+            try {
+              await entity.delete();
+              deletedCount++;
+            } catch (_) {}
+          }
+        }
+      }
+    } catch (e) {
+      debugPrint('清理缓存目录失败: $e');
+    }
+
+    return deletedCount;
+  }
+
+  Future<int> _cleanEmptyDirectories() async {
+    int deletedCount = 0;
+    try {
+      final appDir = await getApplicationDocumentsDirectory();
+      final cacheDir = await getApplicationCacheDirectory();
+      final dirs = [
+        Directory('${appDir.path}/images'),
+        Directory('${appDir.path}/epub_books'),
+        cacheDir,
+      ];
+      for (final dir in dirs) {
+        if (!await dir.exists()) continue;
+        deletedCount += await _removeEmptyDirsRecursive(dir);
+      }
+    } catch (e) {
+      debugPrint('清理空文件夹失败: $e');
+    }
+    return deletedCount;
+  }
+
+  Future<int> _removeEmptyDirsRecursive(Directory dir) async {
+    int count = 0;
+    try {
+      final children = await dir.list(followLinks: false).toList();
+      for (final child in children) {
+        if (child is Directory) {
+          count += await _removeEmptyDirsRecursive(child);
+          final remaining = await child.list(followLinks: false).toList();
+          if (remaining.isEmpty) {
+            try {
+              await child.delete();
+              count++;
+            } catch (_) {}
+          }
+        }
+      }
+    } catch (_) {}
+    return count;
+  }
+}
+
+class CacheCleanResult {
+  final int images;
+  final int epubs;
+  final int temp;
+  final int emptyDirs;
+
+  const CacheCleanResult({
+    required this.images,
+    required this.epubs,
+    required this.temp,
+    required this.emptyDirs,
+  });
+
+  int get total => images + epubs + temp + emptyDirs;
+
+  String get description =>
+      '已清理 $images 个孤立图片，$epubs 个孤立电子书，$temp 个临时文件，$emptyDirs 个空文件夹';
+}