Implement Webuntis HTTP Api and Display

lib/data/timetable/persistantTimetable.dart

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+import 'dart:async';
+
+import 'package:flutter/widgets.dart';
+import 'package:path/path.dart';
+import 'package:sqflite/sqflite.dart';
+
+class PersistantTimetable {
+  final int id;
+  final String json;
+
+  PersistantTimetable(this.id, this.json);
+}

lib/data/timetable/timetable.dart

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+import 'dart:collection';
+import 'dart:convert';
+import 'dart:developer';
+
+import 'package:intl/intl.dart';
+import 'package:marianum_mobile/api/webuntis/queries/authenticate/authenticate.dart';
+import 'package:marianum_mobile/api/webuntis/queries/authenticate/authenticateResponse.dart';
+import 'package:marianum_mobile/api/webuntis/queries/getRooms/getRoomsCache.dart';
+import 'package:marianum_mobile/api/webuntis/queries/getRooms/getRoomsResponse.dart';
+import 'package:marianum_mobile/api/webuntis/queries/getSubjects/getSubjectsCache.dart';
+import 'package:marianum_mobile/api/webuntis/queries/getSubjects/getSubjectsResponse.dart';
+import 'package:marianum_mobile/data/dataHolder.dart';
+
+import '../../api/webuntis/queries/getTimetable/getTimetable.dart';
+import '../../api/webuntis/queries/getTimetable/getTimetableCache.dart';
+import '../../api/webuntis/queries/getTimetable/getTimetableParams.dart';
+import '../../api/webuntis/queries/getTimetable/getTimetableResponse.dart';
+
+class Timetable extends DataHolder {
+  int day = int.parse(DateFormat("yyyyMMdd").format(DateTime.now()));
+
+  Timetable() : super();
+
+  GetTimetableResponse? _getTimetableResponse;
+  GetTimetableResponse? get getTimetableResponse => _getTimetableResponse;
+
+  GetRoomsResponse? _getRoomsResponse;
+  GetRoomsResponse? get getRoomsResponse => _getRoomsResponse;
+
+  GetSubjectsResponse? _getSubjectsResponse;
+  GetSubjectsResponse? get getSubjectsResponse => _getSubjectsResponse;
+
+  @override
+  Future<void> run() async {
+    GetTimetableCache(
+        day: day,
+        onUpdate: (data) =>
+        {
+          _getTimetableResponse = data,
+          notifyListeners(),
+        }
+    );
+
+    GetRoomsCache(
+        onUpdate: (data) =>
+        {
+          _getRoomsResponse = data,
+          notifyListeners(),
+        }
+    );
+
+    GetSubjectsCache(
+        onUpdate: (data) =>
+        {
+          _getSubjectsResponse = data,
+          notifyListeners(),
+        }
+    );
+  }
+}