Feat: Stellt den BackgroundManager auf IsolateManager um

lib/Controller/background_task_controller.dart

@@ -1,19 +1,18 @@
 import 'dart:async';
 import 'dart:io';
-import 'dart:isolate';
 
-import 'package:flutter/services.dart';
+import 'package:flutter/foundation.dart';
+import 'package:isolate_manager/isolate_manager.dart';
 import 'package:workmanager/workmanager.dart';
 
-import '../Tasks/generate_transactions_task.dart';
-import '../Tasks/task.dart';
-import 'port_controller.dart';
+import '../Tasks/workers.dart';
+import '../Tasks/workmanager_workers.dart';
 
 /// Erstellt Hintergrundtasks und führt diese aus
 class BackgroundTaskController {
   /// Erstellt eine neue Instanz dieser Klasse
   BackgroundTaskController() {
-    if (Platform.isAndroid) {
+    if (!kIsWeb && Platform.isAndroid) {
       unawaited(Workmanager().initialize(callbackDispatcher));
       unawaited(
         Workmanager().registerPeriodicTask(
@@ -25,47 +24,12 @@ class BackgroundTaskController {
       );
     } else {
       unawaited(
-        Isolate.run(() {
-          unawaited(_runTask(
-            GenerateTransactionsTask(),
-            const Duration(minutes: 1),
-            const Duration(minutes: 30),
-          ));
+        IsolateManager.runFunction(runTask, {
+          'taskName': 'generate_transactions',
+          'initialDelayMinutes': 1,
+          'frequencyMinutes': 30,
         }),
       );
     }
   }
-
-  Future<void> _runTask(
-    final Task task,
-    final Duration initialDelay,
-    final Duration frequency,
-  ) async {
-    await Future.delayed(initialDelay);
-
-    final RootIsolateToken? rootIsolateToken = await PortController()
-        .getRootIsolateToken();
-
-    if (rootIsolateToken != null) {
-      BackgroundIsolateBinaryMessenger.ensureInitialized(rootIsolateToken);
-      await GenerateTransactionsTask().execute();
-    }
-
-    await Future.delayed(frequency);
-
-    unawaited(_runTask(task, initialDelay, frequency));
-  }
-}
-
-/// Die Funktion wird von Hintergrundtasks ausgerufen, um diese auszuführen
-@pragma('vm:entry-point')
-void callbackDispatcher() {
-  Workmanager().executeTask((final task, final inputData) {
-    switch (task) {
-      case 'generate_transactions':
-        return GenerateTransactionsTask().execute();
-    }
-
-    return Future.value(true);
-  });
 }

lib/Controller/port_controller.dart

@@ -2,24 +2,28 @@ import 'dart:async';
 import 'dart:isolate';
 import 'dart:ui';
 
+import 'package:flutter/foundation.dart';
 import 'package:flutter/services.dart';
+import 'package:logger/logger.dart';
 
-/// Ein PortController mit verschiedenen FUnktionen zur KOmmunikations zwischen
+/// Ein PortController mit verschiedenen Funktionen zur Kommunikation zwischen
 /// main und anderen Isolates
 class PortController {
   /// Gibt eine Instanz dieser Klasse zurück
   factory PortController() => _instance;
 
   PortController._internal() {
-    if (ServicesBinding.rootIsolateToken != null) {
+    if (!kIsWeb && ServicesBinding.rootIsolateToken != null) {
       _registerRootIsolateTokenSender();
     }
   }
 
   static final PortController _instance = PortController._internal();
+  final Logger _logger = Logger();
 
   /// Fügt einen Port mit [name] zum NameServer hinzu
   void addPort(final SendPort sendPort, final String name) {
+    IsolateNameServer.removePortNameMapping(name);
     IsolateNameServer.registerPortWithName(sendPort, name);
   }
 
@@ -29,6 +33,8 @@ class PortController {
 
   /// Gibt das [RootIsolateToken] der main-Isolate zurück
   Future<RootIsolateToken?> getRootIsolateToken() async {
+    _logger.d('Trying to retrieve RootIsolateToken...');
+
     final ReceivePort receivePort = ReceivePort();
 
     final SendPort? rootPort = IsolateNameServer.lookupPortByName(
@@ -36,21 +42,26 @@ class PortController {
     );
 
     if (rootPort == null) {
+      _logger.e("Couldn't get Port from IsolateNameServer!");
       receivePort.close();
       return null;
     }
 
+    _logger.i('Sending communication attempt...');
     rootPort.send(receivePort.sendPort);
 
     try {
       final dynamic message = await receivePort.first;
 
       if (message is RootIsolateToken) {
+        _logger.i('Got RootIsolateToken, returning...');
         return message;
       }
 
+      _logger.w("Couldn't get RootIsolateToken!");
       return null;
     } finally {
+      _logger.i('Closing receivePort...');
       receivePort.close();
     }
   }
@@ -58,6 +69,8 @@ class PortController {
   void _registerRootIsolateTokenSender() {
     final ReceivePort receivePort = ReceivePort()
       ..listen((final value) {
+        _logger.d('Received Message with $value');
+
         if (value is SendPort) {
           value.send(ServicesBinding.rootIsolateToken);
         }

lib/Entities/drift_database.dart

@@ -102,5 +102,6 @@ class AppDatabase extends _$AppDatabase {
       sqlite3Wasm: Uri.parse('sqlite3.wasm'),
       driftWorker: Uri.parse('drift_worker.js'),
     ),
+      native: const DriftNativeOptions(shareAcrossIsolates: true)
   );
 }

lib/Entities/drift_database.g.dart

@@ -577,8 +577,7 @@ class RecurringTransaction extends DataClass
   String toString() {
     return (StringBuffer('RecurringTransaction(')
           ..write('id: $id, ')
-          ..write('name: $name, ')
-          ..write('startDate: $startDate, ')..write(
+          ..write('name: $name, ')..write('startDate: $startDate, ')..write(
           'timeFrame: $timeFrame, ')..write('amount: $amount, ')..write(
           'accountId: $accountId, ')..write('updatedAt: $updatedAt')
           ..write(')'))
@@ -702,8 +701,7 @@ class RecurringTransactionsCompanion
   String toString() {
     return (StringBuffer('RecurringTransactionsCompanion(')
           ..write('id: $id, ')
-          ..write('name: $name, ')
-          ..write('startDate: $startDate, ')..write(
+          ..write('name: $name, ')..write('startDate: $startDate, ')..write(
           'timeFrame: $timeFrame, ')..write('amount: $amount, ')..write(
           'accountId: $accountId, ')..write('updatedAt: $updatedAt')
           ..write(')'))
@@ -1076,11 +1074,14 @@ class Transaction extends DataClass implements Insertable<Transaction> {
   @override
   String toString() {
     return (StringBuffer('Transaction(')
-          ..write('id: $id, ')..write('name: $name, ')..write(
-          'date: $date, ')..write('amount: $amount, ')..write(
-          'checked: $checked, ')..write('accountId: $accountId, ')..write(
-          'recurringTransactionId: $recurringTransactionId, ')..write(
-          'updatedAt: $updatedAt')
+          ..write('id: $id, ')
+          ..write('name: $name, ')
+          ..write('date: $date, ')
+          ..write('amount: $amount, ')
+          ..write('checked: $checked, ')
+          ..write('accountId: $accountId, ')
+          ..write('recurringTransactionId: $recurringTransactionId, ')
+          ..write('updatedAt: $updatedAt')
           ..write(')'))
         .toString();
   }
@@ -1220,11 +1221,15 @@ class TransactionsCompanion extends UpdateCompanion<Transaction> {
   @override
   String toString() {
     return (StringBuffer('TransactionsCompanion(')
-          ..write('id: $id, ')..write('name: $name, ')..write(
-          'date: $date, ')..write('amount: $amount, ')..write(
-          'checked: $checked, ')..write('accountId: $accountId, ')..write(
-          'recurringTransactionId: $recurringTransactionId, ')..write(
-          'updatedAt: $updatedAt')..write(')'))
+          ..write('id: $id, ')
+          ..write('name: $name, ')
+          ..write('date: $date, ')
+          ..write('amount: $amount, ')
+          ..write('checked: $checked, ')
+          ..write('accountId: $accountId, ')
+          ..write('recurringTransactionId: $recurringTransactionId, ')
+          ..write('updatedAt: $updatedAt')
+          ..write(')'))
         .toString();
   }
 }
@@ -1233,9 +1238,7 @@ class $SyncLogTable extends SyncLog with TableInfo<$SyncLogTable, SyncLogData> {
   @override
   final GeneratedDatabase attachedDatabase;
   final String? _alias;
-
   $SyncLogTable(this.attachedDatabase, [this._alias]);
-
   static const VerificationMeta _idMeta = const VerificationMeta('id');
   @override
   late final GeneratedColumn<int> id = GeneratedColumn<int>(
@@ -1282,19 +1285,16 @@ class $SyncLogTable extends SyncLog with TableInfo<$SyncLogTable, SyncLogData> {
     requiredDuringInsert: false,
     defaultValue: currentDateAndTime,
   );
-
   @override
   List<GeneratedColumn> get $columns => [id, type, description, updatedAt];
-
   @override
   String get aliasedName => _alias ?? actualTableName;
-
   @override
   String get actualTableName => $name;
   static const String $name = 'sync_log';
-
   @override
-  VerificationContext validateIntegrity(Insertable<SyncLogData> instance, {
+  VerificationContext validateIntegrity(
+    Insertable<SyncLogData> instance, {
     bool isInserting = false,
   }) {
     final context = VerificationContext();
@@ -1322,7 +1322,6 @@ class $SyncLogTable extends SyncLog with TableInfo<$SyncLogTable, SyncLogData> {
 
   @override
   Set<GeneratedColumn> get $primaryKey => {id};
-
   @override
   SyncLogData map(Map<String, dynamic> data, {String? tablePrefix}) {
     final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
@@ -1369,14 +1368,12 @@ class SyncLogData extends DataClass implements Insertable<SyncLogData> {
 
   /// Wann dieser SyncLog das letzte mal geupdated wurde
   final DateTime updatedAt;
-
   const SyncLogData({
     required this.id,
     required this.type,
     required this.description,
     required this.updatedAt,
   });
-
   @override
   Map<String, Expression> toColumns(bool nullToAbsent) {
     final map = <String, Expression>{};
@@ -1398,7 +1395,8 @@ class SyncLogData extends DataClass implements Insertable<SyncLogData> {
     );
   }
 
-  factory SyncLogData.fromJson(Map<String, dynamic> json, {
+  factory SyncLogData.fromJson(
+    Map<String, dynamic> json, {
     ValueSerializer? serializer,
   }) {
     serializer ??= driftRuntimeOptions.defaultSerializer;
@@ -1411,7 +1409,6 @@ class SyncLogData extends DataClass implements Insertable<SyncLogData> {
       updatedAt: serializer.fromJson<DateTime>(json['updatedAt']),
     );
   }
-
   @override
   Map<String, dynamic> toJson({ValueSerializer? serializer}) {
     serializer ??= driftRuntimeOptions.defaultSerializer;
@@ -1428,14 +1425,12 @@ class SyncLogData extends DataClass implements Insertable<SyncLogData> {
     SyncLogTypeEnum? type,
     String? description,
     DateTime? updatedAt,
-  }) =>
-      SyncLogData(
+  }) => SyncLogData(
     id: id ?? this.id,
     type: type ?? this.type,
     description: description ?? this.description,
     updatedAt: updatedAt ?? this.updatedAt,
   );
-
   SyncLogData copyWithCompanion(SyncLogCompanion data) {
     return SyncLogData(
       id: data.id.present ? data.id.value : this.id,
@@ -1450,15 +1445,16 @@ class SyncLogData extends DataClass implements Insertable<SyncLogData> {
   @override
   String toString() {
     return (StringBuffer('SyncLogData(')
-      ..write('id: $id, ')..write('type: $type, ')..write(
-          'description: $description, ')..write('updatedAt: $updatedAt')..write(
-          ')'))
+          ..write('id: $id, ')
+          ..write('type: $type, ')
+          ..write('description: $description, ')
+          ..write('updatedAt: $updatedAt')
+          ..write(')'))
         .toString();
   }
 
   @override
   int get hashCode => Object.hash(id, type, description, updatedAt);
-
   @override
   bool operator ==(Object other) =>
       identical(this, other) ||
@@ -1474,21 +1470,18 @@ class SyncLogCompanion extends UpdateCompanion<SyncLogData> {
   final Value<SyncLogTypeEnum> type;
   final Value<String> description;
   final Value<DateTime> updatedAt;
-
   const SyncLogCompanion({
     this.id = const Value.absent(),
     this.type = const Value.absent(),
     this.description = const Value.absent(),
     this.updatedAt = const Value.absent(),
   });
-
   SyncLogCompanion.insert({
     this.id = const Value.absent(),
     required SyncLogTypeEnum type,
     this.description = const Value.absent(),
     this.updatedAt = const Value.absent(),
   }) : type = Value(type);
-
   static Insertable<SyncLogData> custom({
     Expression<int>? id,
     Expression<int>? type,
@@ -1540,8 +1533,10 @@ class SyncLogCompanion extends UpdateCompanion<SyncLogData> {
   @override
   String toString() {
     return (StringBuffer('SyncLogCompanion(')
-      ..write('id: $id, ')..write('type: $type, ')..write(
-          'description: $description, ')..write('updatedAt: $updatedAt')
+          ..write('id: $id, ')
+          ..write('type: $type, ')
+          ..write('description: $description, ')
+          ..write('updatedAt: $updatedAt')
           ..write(')'))
         .toString();
   }
@@ -2905,7 +2900,6 @@ class $$SyncLogTableFilterComposer
     super.$addJoinBuilderToRootComposer,
     super.$removeJoinBuilderFromRootComposer,
   });
-
   ColumnFilters<int> get id => $composableBuilder(
     column: $table.id,
     builder: (column) => ColumnFilters(column),
@@ -2937,7 +2931,6 @@ class $$SyncLogTableOrderingComposer
     super.$addJoinBuilderToRootComposer,
     super.$removeJoinBuilderFromRootComposer,
   });
-
   ColumnOrderings<int> get id => $composableBuilder(
     column: $table.id,
     builder: (column) => ColumnOrderings(column),
@@ -2968,7 +2961,6 @@ class $$SyncLogTableAnnotationComposer
     super.$addJoinBuilderToRootComposer,
     super.$removeJoinBuilderFromRootComposer,
   });
-
   GeneratedColumn<int> get id =>
       $composableBuilder(column: $table.id, builder: (column) => column);
 
@@ -3069,7 +3061,6 @@ class $AppDatabaseManager {
       $$RecurringTransactionsTableTableManager(_db, _db.recurringTransactions);
   $$TransactionsTableTableManager get transactions =>
       $$TransactionsTableTableManager(_db, _db.transactions);
-
   $$SyncLogTableTableManager get syncLog =>
       $$SyncLogTableTableManager(_db, _db.syncLog);
 }

lib/Tasks/background_init.dart

@@ -0,0 +1,16 @@
+import 'package:flutter/services.dart';
+import 'package:logger/logger.dart';
+
+import '../Controller/port_controller.dart';
+
+/// Initialisiert benötigte Services in Background-Isolates
+Future<void> initBackground() async {
+  final Logger logger = Logger()..d('Init Background for Native');
+
+  final RootIsolateToken? rootIsolateToken = await PortController()
+      .getRootIsolateToken();
+  if (rootIsolateToken != null) {
+    logger.i('Initialising BackgroundIsolateBinaryMessenger...');
+    BackgroundIsolateBinaryMessenger.ensureInitialized(rootIsolateToken);
+  }
+}

lib/Tasks/background_init_web.dart

@@ -0,0 +1,6 @@
+import 'package:logger/logger.dart';
+
+/// Initialisiert benötigte Services in Background-Isolates für Web
+Future<void> initBackground() async {
+  Logger().d('Init Background for Web');
+}

lib/Tasks/generate_transactions_task.dart

@@ -1,4 +1,5 @@
 import 'package:drift/drift.dart';
+import 'package:logger/logger.dart';
 
 import '../Entities/drift_database.dart';
 import '../Entities/time_frame_enum.dart';
@@ -13,12 +14,18 @@ class GenerateTransactionsTask extends Task {
   final RecurringTransactionRepository _recurringTransactionRepository =
       RecurringTransactionRepository();
 
+  final Logger _logger = Logger();
+
   @override
   Future<bool> execute() async {
+    _logger.i('Generating Transactions of recurring Transactions...');
+
     final List<RecurringTransaction> recurringTransactions =
         await _recurringTransactionRepository.findBy();
 
     for (final recurringTransaction in recurringTransactions) {
+      _logger.i('Generating Transactions of $recurringTransaction...');
+
       final List<Transaction> transactions = await _transactionRepository
           .findBy(
             recurringTransaction: recurringTransaction,
@@ -43,6 +50,7 @@ class GenerateTransactionsTask extends Task {
       }
 
       if (DateTime.now().compareTo(nextTransactionDate) <= 0) {
+        // TODO: Nicht mit NOW, sondern Ende dieses Monats Vergleichen
         final TransactionsCompanion transaction = TransactionsCompanion(
           name: Value(recurringTransaction.name),
           date: Value(nextTransactionDate),
@@ -52,10 +60,15 @@ class GenerateTransactionsTask extends Task {
           recurringTransactionId: Value(recurringTransaction.id),
         );
 
+        _logger.i(
+          'Adding transaction ${transaction.name} on ${transaction.date}',
+        );
+
         await _transactionRepository.add(transaction);
       }
     }
 
+    _logger.i('Generating transactions completed.');
     return true;
   }
 }

lib/Tasks/workers.dart

@@ -0,0 +1,38 @@
+import 'dart:async';
+
+import 'package:isolate_manager/isolate_manager.dart';
+
+import 'background_init_web.dart' if (dart.library.io) 'background_init.dart';
+import 'generate_transactions_task.dart';
+
+@pragma('vm:entry-point')
+@isolateManagerWorker
+/// Führt eine Hintergrundtask lokal aus
+Future<void> runTask(final Map<String, dynamic> params) async {
+  final String taskName = params['taskName'];
+  final int initialDelayMinutes = params['initialDelayMinutes'];
+  final int frequencyMinutes = params['frequencyMinutes'];
+
+  await Future.delayed(Duration(minutes: initialDelayMinutes));
+
+  await executeTask(taskName, null);
+
+  await Future.delayed(Duration(minutes: frequencyMinutes));
+
+  unawaited(runTask(params));
+}
+
+/// Funktion um Hintergrundaufgaben auszuführen
+Future<bool> executeTask(
+  final String taskName,
+  final Map<String, dynamic>? inputData,
+) async {
+  await initBackground();
+
+  switch (taskName) {
+    case 'generate_transactions':
+      return GenerateTransactionsTask().execute();
+  }
+
+  return Future.value(true);
+}

lib/Tasks/workmanager_workers.dart

@@ -0,0 +1,9 @@
+import 'package:workmanager/workmanager.dart';
+
+import 'workers.dart';
+
+/// Die Funktion wird von Hintergrundtasks ausgerufen, um diese auszuführen
+@pragma('vm:entry-point')
+void callbackDispatcher() {
+  Workmanager().executeTask(executeTask);
+}

lib/main.dart

@@ -3,6 +3,7 @@ import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:routemaster/routemaster.dart';
 
 import 'Controller/background_task_controller.dart';
+import 'Controller/port_controller.dart';
 import 'Services/navigation_service.dart';
 import 'Services/router_service.dart';
 import 'Services/theme_service.dart';
@@ -10,6 +11,7 @@ import 'Services/theme_service.dart';
 void main() {
   WidgetsFlutterBinding.ensureInitialized();
 
+  PortController();
   BackgroundTaskController();
 
   runApp(