fixed warns and timetable thing again

filcnaplo_kreta_api/lib/client/client.dart

@@ -26,6 +26,8 @@ class KretaClient {
   late final UserProvider _user;
   late final StatusProvider _status;
 
+  bool _loginRefreshing = false;
+
   KretaClient({
     this.accessToken,
     required SettingsProvider settings,
@@ -164,6 +166,9 @@ class KretaClient {
   }
 
   Future<void> refreshLogin() async {
+    if (_loginRefreshing) return;
+    _loginRefreshing = true;
+
     User? loginUser = _user.user;
     if (loginUser == null) return;
 
@@ -215,5 +220,7 @@ class KretaClient {
         }
       }
     }
+
+    _loginRefreshing = false;
   }
 }

filcnaplo_kreta_api/lib/providers/timetable_provider.dart

@@ -5,7 +5,7 @@ import 'package:filcnaplo_kreta_api/client/api.dart';
 import 'package:filcnaplo_kreta_api/client/client.dart';
 import 'package:filcnaplo_kreta_api/models/lesson.dart';
 import 'package:filcnaplo_kreta_api/models/week.dart';
-import 'package:flutter/material.dart';
+import 'package:flutter/foundation.dart';
 
 class TimetableProvider with ChangeNotifier {
   Map<Week, List<Lesson>> lessons = {};
@@ -69,14 +69,14 @@ class TimetableProvider with ChangeNotifier {
         .getAPI(KretaAPI.timetable(iss, start: week.start, end: week.end));
 
     if (lessonsJson == null) {
+      if (kDebugMode) print('Cannot fetch Lessons for User ${user.id}');
+
       return;
       // throw "Cannot fetch Lessons for User ${user.id}";
     } else {
       List<Lesson> lessonsList =
           lessonsJson.map((e) => Lesson.fromJson(e)).toList();
 
-      if (lessons.isEmpty) return;
-
       lessons[week] = lessonsList;
 
       await store();