Add availability stream

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/control/scanner_controller_impl.dart b/lib/control/scanner_controller_impl.dart
index e60aec3..ac1c28c 100644
--- a/lib/control/scanner_controller_impl.dart
+++ b/lib/control/scanner_controller_impl.dart
@@ -12,6 +12,8 @@ abstract class ScannerControllerImpl extends ScannerController {
   final StreamController<ScanAvailability> _availabilityStreamController =
       StreamController<ScanAvailability>.broadcast();
 
+  ScanAvailability? _latestAvailability;
+
   @override
   Stream<ScanStatus> get statusStream => _scanStatusController.stream;
 
@@ -22,6 +24,15 @@ abstract class ScannerControllerImpl extends ScannerController {
   Stream<ScanAvailability> get availabilityStream =>
       _availabilityStreamController.stream;
 
+  ScannerControllerImpl() {
+    // fucking broadcast streams not even caching one value...
+    _availabilityStreamController.onListen = () {
+      if (_latestAvailability != null) {
+        _availabilityStreamController.add(_latestAvailability!);
+      }
+    };
+  }
+
   @protected
   void setStatus(ScanStatus newStatus) {
     if (_scanStatusController.isClosed) return;
@@ -39,6 +50,7 @@ abstract class ScannerControllerImpl extends ScannerController {
   @protected
   void setAvailability(ScanAvailability available) {
     _availabilityStreamController.add(available);
+    _latestAvailability = available;
   }
 
   @override