Initial

lib/utils_from_FBPExample/extra.dart

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+import 'utils.dart';
+
+import 'package:flutter_blue_plus/flutter_blue_plus.dart';
+
+final Map<DeviceIdentifier, StreamControllerReemit<bool>> _cglobal = {};
+final Map<DeviceIdentifier, StreamControllerReemit<bool>> _dglobal = {};
+
+/// connect & disconnect + update stream
+extension Extra on BluetoothDevice {
+  // convenience
+  StreamControllerReemit<bool> get _cstream {
+    _cglobal[remoteId] ??= StreamControllerReemit(initialValue: false);
+    return _cglobal[remoteId]!;
+  }
+
+  // convenience
+  StreamControllerReemit<bool> get _dstream {
+    _dglobal[remoteId] ??= StreamControllerReemit(initialValue: false);
+    return _dglobal[remoteId]!;
+  }
+
+  // get stream
+  Stream<bool> get isConnecting {
+    return _cstream.stream;
+  }
+
+  // get stream
+  Stream<bool> get isDisconnecting {
+    return _dstream.stream;
+  }
+
+  // connect & update stream
+  Future<void> connectAndUpdateStream() async {
+    _cstream.add(true);
+    try {
+      await connect(mtu: null);
+    } finally {
+      _cstream.add(false);
+    }
+  }
+
+  // disconnect & update stream
+  Future<void> disconnectAndUpdateStream({bool queue = true}) async {
+    _dstream.add(true);
+    try {
+      await disconnect(queue: queue);
+    } finally {
+      _dstream.add(false);
+    }
+  }
+}