Support working on background #7

correct overrides for isolates

lib/classes/receiver.dart

@@ -104,9 +104,9 @@ class Receiver {
   ///sends `400 Bad request` as response
   ///
   ///Returns the code generated for discovery. Other devices should select this code for
-  ///connecting to this device
+  ///connecting to this devices
   Future<int> listen() async {
-    if (!saveToTemp) {
+    if (!saveToTemp && false) {
       final permissionStatus = await checkPermission();
       if (!permissionStatus) {
         throw NoStoragePermissionException();
@@ -262,7 +262,7 @@ class Receiver {
   Map<String, dynamic> get map => {
         "useDb": useDb,
         "saveToTemp": saveToTemp,
-        "port": port,
+        if (port != null) "port": port,
         "code": _code,
       };
 

lib/classes/workers/worker_interface.dart

@@ -72,6 +72,7 @@ class IsolatedSender extends Sender {
       AnimationController? uploadAnimC,
       bool useDb = true,
       void Function(double percent)? onUploadProgress}) async {
+    await initalize();
     if (progressNotification) {
       progressNotification = await notifications.initalise();
     }
@@ -89,7 +90,7 @@ class IsolatedSender extends Sender {
           break;
         case final messages.FiledropError e:
           if (progressNotification) {
-            await cancelSend();
+            await cancel();
           }
           throw e.exception;
         default:
@@ -107,8 +108,8 @@ class IsolatedSender extends Sender {
     }
   }
 
-  static Future<void> cancelSend() =>
-      _workManager.cancelByUniqueName(MyTasks.send.name);
+  @override
+  Future<void> cancel() => _workManager.cancelByUniqueName(MyTasks.send.name);
 }
 
 Future<void> initalize() async {
@@ -139,10 +140,11 @@ class IsolatedReceiver extends Receiver {
   ///If called twice, it has no effect.
   @override
   Future<int> listen() async {
+    await initalize();
     if (progressNotification) {
       progressNotification = await notifications.initalise();
     }
-    if (!saveToTemp) {
+    if (!saveToTemp && false) {
       final permissionStatus = await super.checkPermission();
       if (!permissionStatus) {
         throw NoStoragePermissionException();
@@ -156,6 +158,12 @@ class IsolatedReceiver extends Receiver {
     return super.code;
   }
 
+  @override
+  Future<void> stopListening() async {
+    await notifications.cancelDownload();
+    await _workManager.cancelByUniqueName(MyTasks.receive.name);
+  }
+
   Future<void> _portCallback(message) async {
     switch (message as messages.ReceiverMessage) {
       case final messages.UpdatePercent e:
@@ -190,10 +198,4 @@ class IsolatedReceiver extends Receiver {
         throw Error();
     }
   }
-
-  ///Stops [Receiver] worker.
-  static Future<void> cancelReceive() async {
-    await notifications.cancelDownload();
-    await _workManager.cancelByUniqueName(MyTasks.receive.name);
-  }
 }

lib/screens/receive_page.dart

@@ -31,11 +31,8 @@ class ReceivePageInner extends ConsumerStatefulWidget {
 }
 
 class _ReceivePageInnerState extends ConsumerState<ReceivePageInner>
-    with TickerProviderStateMixin {
-  late final _downloadAnimC = AnimationController(vsync: this)
-    ..addListener(() {
-      setState(() {});
-    });
+    with SingleTickerProviderStateMixin {
+  late AnimationController _downloadAnimC;
   late final _receiver = defaultTargetPlatform == TargetPlatform.android ||
           defaultTargetPlatform == TargetPlatform.iOS
       ? IsolatedReceiver(
@@ -75,6 +72,10 @@ class _ReceivePageInnerState extends ConsumerState<ReceivePageInner>
 
   @override
   void initState() {
+    _downloadAnimC = AnimationController(vsync: this)
+      ..addListener(() {
+        setState(() {});
+      });
     super.initState();
     _receive();
   }