api and storage restructure

lib/api/webuntis/queries/getSubjects/getSubjectsCache.dart

@@ -1,27 +1,14 @@
-import 'dart:convert';
-
 import '../../../requestCache.dart';
 import 'getSubjects.dart';
 import 'getSubjectsResponse.dart';
 
-class GetSubjectsCache extends RequestCache<GetSubjectsResponse> {
-  GetSubjectsCache({
-    void Function(GetSubjectsResponse)? onUpdate,
-    void Function(Exception)? onError,
-    bool? renew,
-  }) : super(
-          RequestCache.cacheHour,
-          onUpdate,
-          onError: onError ?? RequestCache.ignore,
-          renew: renew,
+class GetSubjectsCache extends SimpleCache<GetSubjectsResponse> {
+  GetSubjectsCache({super.onUpdate, super.onError, super.renew})
+      : super(
+          cacheTime: RequestCache.cacheHour,
+          loader: () => GetSubjects().run(),
+          fromJson: GetSubjectsResponse.fromJson,
         ) {
     start('wu-subjects');
   }
-
-  @override
-  Future<GetSubjectsResponse> onLoad() => GetSubjects().run();
-
-  @override
-  onLocalData(String json) => GetSubjectsResponse.fromJson(jsonDecode(json));
-
 }