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 +1,127 @@
+// lib/repositories/playlist_repository.dart
+import 'dart:math';
+import '../database/song_database.dart';
+import '../models/playlist.dart';
+import '../services/audio_service.dart';
+
+class PlaylistRepository {
+  final SongDatabase _db = SongDatabase();
+
+  String _generateId() {
+    const chars = 'abcdefghijklmnopqrstuvwxyz0123456789';
+    final random = Random();
+    return String.fromCharCodes(
+      Iterable.generate(
+          16, (_) => chars.codeUnitAt(random.nextInt(chars.length))),
+    );
+  }
+
+  // ════════════════════════════════════════════════════════════
+  // 歌单操作
+  // ════════════════════════════════════════════════════════════
+
+  Future<List<Playlist>> getAllPlaylists() async {
+    final data = await _db.getAllPlaylists();
+    return data.map((e) => Playlist.fromJson(e)).toList();
+  }
+
+  Future<Playlist?> getPlaylist(String id) async {
+    final data = await _db.getPlaylist(id);
+    if (data == null) return null;
+    return Playlist.fromJson(data);
+  }
+
+  Future<Playlist> createPlaylist(String name) async {
+    final playlist = Playlist(id: _generateId(), name: name);
+    await _db.insertPlaylist(playlist.toJson());
+    return playlist;
+  }
+
+  Future<void> updatePlaylistName(String id, String newName) async {
+    await _db.updatePlaylist(id, {
+      'name': newName,
+      'updated_at': DateTime.now().millisecondsSinceEpoch,
+    });
+  }
+
+  // ⭐ 新增：更新播放模式
+  Future<void> updatePlaylistPlayMode(String id, PlayMode playMode) async {
+    await _db.updatePlaylist(id, {
+      // ⭐ 修改前：_playModeToString
+      // 'play_mode': _playModeToString(playMode),
+
+      // ⭐ 修改后：用公开静态方法
+      'play_mode': Playlist.playModeToString(playMode),
+      'updated_at': DateTime.now().millisecondsSinceEpoch,
+    });
+  }
+
+  Future<void> deletePlaylist(String id) async {
+    await _db.deletePlaylist(id);
+  }
+
+  // ════════════════════════════════════════════════════════════
+  // 歌单歌曲操作
+  // ════════════════════════════════════════════════════════════
+
+  Future<List<String>> getPlaylistSongIds(String playlistId) async {
+    final data = await _db.getPlaylistSongs(playlistId);
+    return data.map((e) => e['song_id'] as String).toList();
+  }
+
+  Future<void> addSong(String playlistId, String songId) async {
+    await _db.addSongToPlaylist(playlistId, songId);
+  }
+
+  Future<void> removeSong(String playlistId, String songId) async {
+    await _db.removeSongFromPlaylist(playlistId, songId);
+  }
+
+  Future<void> reorderSongs(
+      String playlistId, int oldIndex, int newIndex) async {
+    if (oldIndex == newIndex) return;
+    final songs = await _db.getPlaylistSongs(playlistId);
+    if (oldIndex < 0 ||
+        oldIndex >= songs.length ||
+        newIndex < 0 ||
+        newIndex >= songs.length) {
+      return;
+    }
+    final items = songs.map((e) => e['song_id'] as String).toList();
+    final item = items.removeAt(oldIndex);
+    items.insert(newIndex, item);
+    for (int i = 0; i < items.length; i++) {
+      await _db.removeSongFromPlaylist(playlistId, items[i]);
+      await _db.addSongToPlaylist(playlistId, items[i], orderIndex: i);
+    }
+  }
+
+  Future<void> clearPlaylist(String playlistId) async {
+    await _db.clearPlaylist(playlistId);
+  }
+
+  // ════════════════════════════════════════════════════════════
+  // 收藏操作
+  // ════════════════════════════════════════════════════════════
+
+  Future<List<String>> getFavorites() async {
+    final data = await _db.getFavorites();
+    return data.map((e) => e['song_id'] as String).toList();
+  }
+
+  Future<bool> isFavorite(String songId) async {
+    return await _db.isFavorite(songId);
+  }
+
+  Future<void> addFavorite(String songId) async {
+    await _db.addFavorite(songId);
+  }
+
+  Future<void> removeFavorite(String songId) async {
+    await _db.removeFavorite(songId);
+  }
+
+  Future<void> toggleFavorite(String songId) async {
+    await _db.toggleFavorite(songId);
+  }
+}