Source Code added

mobile/lib/domain/utils/event_stream.dart

@@ -0,0 +1,38 @@
+import 'dart:async';
+
+class Event {
+  const Event();
+}
+
+class EventStream {
+  EventStream._();
+
+  static final EventStream shared = EventStream._();
+
+  final StreamController<Event> _controller = StreamController<Event>.broadcast();
+
+  void emit(Event event) {
+    _controller.add(event);
+  }
+
+  Stream<T> where<T extends Event>() {
+    if (T == Event) {
+      return _controller.stream as Stream<T>;
+    }
+    return _controller.stream.where((event) => event is T).cast<T>();
+  }
+
+  StreamSubscription<T> listen<T extends Event>(
+    void Function(T event)? onData, {
+    Function? onError,
+    void Function()? onDone,
+    bool? cancelOnError,
+  }) {
+    return where<T>().listen(onData, onError: onError, onDone: onDone, cancelOnError: cancelOnError);
+  }
+
+  /// Closes the stream controller
+  void dispose() {
+    _controller.close();
+  }
+}