Basic Webuntis error handling

lib/data/dataHolder.dart

@@ -1,3 +1,5 @@
+import 'dart:developer';
+
 import 'package:flutter/cupertino.dart';
 import 'package:localstore/localstore.dart';
 
@@ -13,6 +15,12 @@ abstract class DataHolder extends ChangeNotifier {
   List<ApiResponse?> properties();
 
   bool primaryLoading() {
-    return properties().where((element) => element != null).isEmpty;
+    log(properties().toString());
+
+    for(ApiResponse? element in properties()) {
+      if(element == null) return true;
+    }
+    return false;
+    //return properties().where((element) => element != null).isEmpty;
   }
 }

lib/data/timetable/timetableProps.dart

@@ -1,4 +1,6 @@
 
+import 'dart:developer';
+
 import 'package:intl/intl.dart';
 import 'package:marianum_mobile/api/apiResponse.dart';
 import 'package:marianum_mobile/api/webuntis/queries/getHolidays/getHolidaysCache.dart';
@@ -11,6 +13,7 @@ import 'package:marianum_mobile/data/dataHolder.dart';
 
 import '../../api/webuntis/queries/getTimetable/getTimetableCache.dart';
 import '../../api/webuntis/queries/getTimetable/getTimetableResponse.dart';
+import '../../api/webuntis/webuntisError.dart';
 
 extension DateTimeExtension on DateTime {
   DateTime next(int day) {
@@ -40,11 +43,9 @@ class TimetableProps extends DataHolder {
   GetHolidaysResponse? _getHolidaysResponse;
   GetHolidaysResponse get getHolidaysResponse => _getHolidaysResponse!;
 
-
-  TimetableProps() {
-    //nearest();
-
-  }
+  WebuntisError? error;
+  WebuntisError? get getError => error;
+  bool get hasError => error != null;
 
   @override
   List<ApiResponse?> properties() {
@@ -54,12 +55,17 @@ class TimetableProps extends DataHolder {
   @override
   void run() {
     GetTimetableCache(
-        startdate: int.parse(DateFormat("yyyyMMdd").format(startDate)),
-        enddate: int.parse(DateFormat("yyyyMMdd").format(endDate)),
-        onUpdate: (GetTimetableResponse data) => {
-          _getTimetableResponse = data,
-          notifyListeners(),
-        }
+      startdate: int.parse(DateFormat("yyyyMMdd").format(startDate)),
+      enddate: int.parse(DateFormat("yyyyMMdd").format(endDate)),
+      onUpdate: (GetTimetableResponse data) => {
+        _getTimetableResponse = data,
+        notifyListeners(),
+      },
+      onError: (Exception e) => {
+        error = e as WebuntisError?,
+        log("hello there"),
+        notifyListeners(),
+      }
     );
 
     GetRoomsCache(
@@ -106,8 +112,17 @@ class TimetableProps extends DataHolder {
   }
 
   void updateWeek() {
+    properties().forEach((element) => element = null);
+    error = null;
+    notifyListeners();
     startDate = getDate(_queryWeek.subtract(Duration(days: _queryWeek.weekday - 1)));
     endDate = getDate(_queryWeek.add(Duration(days: DateTime.daysPerWeek - _queryWeek.weekday)));
-    run();
+    try {
+      run();
+    } on WebuntisError catch(e) {
+      error = e;
+      notifyListeners();
+      log(e.toString());
+    }
   }
 }