Fix: Macht die BackgroundWorker für den IsolateManager on Web möglich

lib/PlatformDependent/Native/update_transactions.dart

@@ -0,0 +1,6 @@
+import '../../Controller/port_controller.dart';
+
+/// Aktualisiert die Transaktionen, die angezeigt werden
+void updateTransactions() {
+  PortController().getPort('update-transactions')?.send('ready');
+}

lib/PlatformDependent/Web/date_utils_web.dart

@@ -0,0 +1,19 @@
+/// Utility functions for working with dates.
+class DateUtils {
+  /// Returns a [DateTime] that is [monthDate] with the added number
+  /// of months and the day set to 1 and time set to midnight.
+  ///
+  /// For example:
+  ///
+  /// ```dart
+  /// DateTime date = DateTime(2019, 1, 15);
+  /// DateTime futureDate = DateUtils.addMonthsToMonthDate(date, 3);
+  /// ```
+  ///
+  /// `date` would be January 15, 2019.
+  /// `futureDate` would be April 1, 2019 since it adds 3 months.
+  static DateTime addMonthsToMonthDate(
+    final DateTime monthDate,
+    final int monthsToAdd,
+  ) => DateTime(monthDate.year, monthDate.month + monthsToAdd);
+}

lib/PlatformDependent/Web/local_notifications_web_stub.dart

@@ -0,0 +1,7 @@
+/// Ein Stub
+class LocalNotifications {
+  /// Ein Stub
+  Future<void> showTransactionsToCheckNotification(
+    final List<dynamic> transactions,
+  ) async {}
+}

lib/PlatformDependent/Web/update_transactions.dart

@@ -0,0 +1,2 @@
+/// Ein Stub
+void updateTransactions() {}

lib/Tasks/BackgroundHandler/background_init_web.dart

@@ -1,6 +1,6 @@
 import 'package:logger/logger.dart';
 
-/// Initialisiert benötigte Services in Background-Isolates für Web
+/// Initialisiert benötigte Services in Background-Isolates für PlatformDependent
 Future<void> initBackground() async {
-  Logger().d('Init Background for Web');
+  Logger().d('Init Background for PlatformDependent');
 }

lib/Tasks/generate_transactions_task.dart

@@ -1,14 +1,14 @@
 import 'dart:async';
 
 import 'package:drift/drift.dart';
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
 import 'package:logger/logger.dart';
 
-import '../Controller/port_controller.dart';
-import '../Controller/transaction_controller.dart';
 import '../Entities/drift_database.dart';
 import '../Entities/time_frame_enum.dart';
+import '../PlatformDependent/Web/date_utils_web.dart'
+    if (dart.library.io) 'package:flutter/material.dart';
+import '../PlatformDependent/Web/update_transactions.dart'
+    if (dart.library.io) '../PlatformDependent/Native/update_transactions.dart';
 import '../Repositories/recurring_transacation_repository.dart';
 import '../Repositories/transaction_repository.dart';
 import 'task.dart';
@@ -48,11 +48,7 @@ class GenerateTransactionsTask extends Task {
 
     _logger.i('Generating transactions completed.');
 
-    if (!kIsWeb) {
-      PortController().getPort('update-transactions')?.send('ready');
-    } else {
-      unawaited(TransactionController().updateTransactions());
-    }
+    updateTransactions();
 
     return true;
   }

lib/Tasks/show_notifications_task.dart

@@ -1,7 +1,8 @@
 import 'package:logger/logger.dart';
 
-import '../Controller/local_notifications.dart';
 import '../Entities/drift_database.dart';
+import '../PlatformDependent/Web/local_notifications_web_stub.dart'
+    if (dart.library.io) '../Controller/local_notifications.dart';
 import '../Repositories/transaction_repository.dart';
 import 'task.dart';
 
@@ -18,6 +19,7 @@ class ShowNotificationsTask extends Task {
 
     if (transactions.isNotEmpty) {
       Logger().i('Showing notification for unchecked transactions...');
+
       await LocalNotifications().showTransactionsToCheckNotification(
         transactions,
       );

lib/Web/local_notifications_web_stub.dart

@@ -0,0 +1 @@
+// TODO Implement this library.