为查询添加缓存

bin/domain/repositories/album_repository.dart

@@ -6,10 +6,17 @@ import '../entities/album.dart';
 
 class AlbumRepository {
   final String basePath;
+  final List<Album> _albums = List.empty(growable: true);
+  DateTime _updated = DateTime.utc(1970);
 
   AlbumRepository({required this.basePath});
 
   Future<List<Album>> getAllAlbums() async {
+    if (DateTime.now().difference(_updated).inSeconds <= 60) {
+      return _albums;
+    }
+    _updated = DateTime.now();
+
     final dir = Directory(basePath);
     if (!await dir.exists()) {
       return [];
@@ -29,7 +36,8 @@ class AlbumRepository {
           );
         })
         .toList();
-
+    _albums.clear();
+    _albums.addAll(albums);
     return albums;
   }