引入播放列表库，同时引入全新的播放控制器，以控制读库与播放模式的动作，但是功能仍在完善，需要确认部分边界问题

2026-08-27 22:29:20 +08:00
parent ad6617592e
commit e58be9c17f
6 changed files with 677 additions and 126 deletions
@@ -0,0 +1,131 @@
+// lib/controllers/playback_controller.dart
+import '../services/audio_service.dart';
+import '../services/webdav_service.dart';
+import '../database/song_database.dart';
+
+class PlaybackController {
+  static final PlaybackController _instance = PlaybackController._internal();
+  factory PlaybackController() => _instance;
+  PlaybackController._internal();
+
+  final AudioService _audioService = AudioService();
+  final SongDatabase _db = SongDatabase();
+
+  // ════════════════════════════════════════════════════════════
+  // 播放 WebDAV 目录中的歌曲（从点击歌曲开始）
+  // ════════════════════════════════════════════════════════════
+  Future<void> playFromWebDAV({
+    required String directoryPath,
+    required String clickedSongPath,
+    required List<WebDAVItem> allItems,
+  }) async {
+    final musicFiles = allItems.where((item) => !item.isDirectory).toList();
+    if (musicFiles.isEmpty) return;
+
+    final clickedIndex =
+        musicFiles.indexWhere((item) => item.path == clickedSongPath);
+    if (clickedIndex == -1) {
+      await _playSingleSong(clickedSongPath);
+      return;
+    }
+
+    final queue = await _buildSongQueue(musicFiles);
+
+    final playMode = _audioService.playMode;
+    // ⭐ 修复：显式指定类型
+    List<Song> finalQueue = List<Song>.from(queue);
+    int startIndex = clickedIndex;
+
+    if (playMode == PlayMode.shuffle) {
+      final shuffled = List<Song>.from(queue)..shuffle();
+      startIndex = shuffled.indexWhere((s) => s.id == clickedSongPath);
+      if (startIndex == -1) startIndex = 0;
+      finalQueue = shuffled;
+    }
+
+    _audioService.setQueue(finalQueue, startIndex: startIndex);
+  }
+
+  // ════════════════════════════════════════════════════════════
+  // 播放整个目录（从第一首开始）
+  // ════════════════════════════════════════════════════════════
+  Future<void> playAllFromWebDAV({
+    required String directoryPath,
+    required List<WebDAVItem> allItems,
+  }) async {
+    final musicFiles = allItems.where((item) => !item.isDirectory).toList();
+    if (musicFiles.isEmpty) return;
+
+    final queue = await _buildSongQueue(musicFiles);
+
+    final playMode = _audioService.playMode;
+    // ⭐ 修复：显式指定类型
+    List<Song> finalQueue = List<Song>.from(queue);
+    if (playMode == PlayMode.shuffle) {
+      finalQueue = List<Song>.from(queue)..shuffle();
+    }
+
+    _audioService.setQueue(finalQueue, startIndex: 0);
+  }
+
+  // ════════════════════════════════════════════════════════════
+  // 播放单曲（fallback）
+  // ════════════════════════════════════════════════════════════
+  Future<void> _playSingleSong(String songPath) async {
+    final url = WebDAVService.instance.getFileUrl(songPath);
+    final dbSong = await _db.getSongByPath(songPath);
+    final song = Song(
+      id: songPath,
+      title: dbSong?['title'] as String? ??
+          songPath.split('/').last.replaceAll(RegExp(r'\.[^.]*$'), ''),
+      artist: dbSong?['artist'] as String? ?? '未知艺术家',
+      url: url,
+    );
+    _audioService.playSong(song);
+  }
+
+  // ════════════════════════════════════════════════════════════
+  // 辅助方法：从音乐文件列表构建 Song 队列
+  // ════════════════════════════════════════════════════════════
+  Future<List<Song>> _buildSongQueue(List<WebDAVItem> musicFiles) async {
+    final queue = <Song>[];
+    for (final item in musicFiles) {
+      final dbSong = await _db.getSongByPath(item.path);
+      final url = WebDAVService.instance.getFileUrl(item.path);
+      if (dbSong != null) {
+        queue.add(Song(
+          id: item.path,
+          title: dbSong['title'] as String? ??
+              item.name.replaceAll(RegExp(r'\.[^.]*$'), ''),
+          artist: dbSong['artist'] as String? ?? '未知艺术家',
+          url: url,
+        ));
+      } else {
+        queue.add(Song(
+          id: item.path,
+          title: item.name.replaceAll(RegExp(r'\.[^.]*$'), ''),
+          artist: '未知艺术家',
+          url: url,
+        ));
+      }
+    }
+    return queue;
+  }
+
+  // ════════════════════════════════════════════════════════════
+  // 播放控制（透传到 AudioService）
+  // ════════════════════════════════════════════════════════════
+  void next() {
+    _audioService.next();
+  }
+
+  void previous() {
+    _audioService.previous();
+  }
+
+  void togglePlayMode() {
+    _audioService.togglePlayMode();
+  }
+
+  PlayMode get playMode => _audioService.playMode;
+}