initial

lib/model/song_model.dart

@@ -0,0 +1,80 @@
+class SongModel {
+  final int id;
+  final String title;
+  final String artist;
+  final Map<String, dynamic>? utTitle; // 可选，根据不同版本标题可能不同
+  final List<String> albums;
+  final bool hasDx;
+  final bool hasSd;
+  final bool hasUt;
+  final String genre;
+  final int bpm;
+  final String releaseDate;
+  final String from;
+
+  // 难度详情映射 key通常是 "0"(Basic), "1"(Advanced) 等，或者 ut 的特殊id
+  final Map<String, dynamic>? dxLevels;
+  final Map<String, dynamic>? sdLevels;
+  final Map<String, dynamic>? utLevels;
+
+  SongModel({
+    required this.id,
+    required this.title,
+    required this.artist,
+    this.utTitle,
+    required this.albums,
+    required this.hasDx,
+    required this.hasSd,
+    required this.hasUt,
+    required this.genre,
+    required this.bpm,
+    required this.releaseDate,
+    required this.from,
+    this.dxLevels,
+    this.sdLevels,
+    this.utLevels,
+  });
+
+  factory SongModel.fromJson(Map<String, dynamic> json) {
+    return SongModel(
+      id: json['id'] ?? 0,
+      title: json['title'] ?? 'Unknown',
+      artist: json['artist'] ?? 'Unknown',
+      utTitle: json['utTitle'],
+      albums: List<String>.from(json['albums'] ?? []),
+      hasDx: json['hasDx'] ?? false,
+      hasSd: json['hasSd'] ?? false,
+      hasUt: json['hasUt'] ?? false,
+      genre: json['genre'] ?? '',
+      bpm: json['bpm'] ?? 0,
+      releaseDate: json['releaseDate'] ?? '',
+      from: json['from'] ?? '',
+      dxLevels: json['dx'],
+      sdLevels: json['sd'],
+      utLevels: json['ut'],
+    );
+  }
+}
+
+// 用于存储本地缓存的版本信息
+class SongCacheInfo {
+  final int songSize;
+  final String version;
+  final DateTime lastUpdate;
+
+  SongCacheInfo({required this.songSize, required this.version, required this.lastUpdate});
+
+  Map<String, dynamic> toJson() => {
+    'songSize': songSize,
+    'version': version,
+    'lastUpdate': lastUpdate.millisecondsSinceEpoch,
+  };
+
+  factory SongCacheInfo.fromJson(Map<String, dynamic> json) {
+    return SongCacheInfo(
+      songSize: json['songSize'] ?? 0,
+      version: json['version'] ?? '',
+      lastUpdate: DateTime.fromMillisecondsSinceEpoch(json['lastUpdate'] ?? 0),
+    );
+  }
+}