Add implementations of BLE controller

q&d

3 files changed, 83 insertions, 0 deletions

diff --git a/lib/control/flutter_blue_plus_scanner_controller.dart b/lib/control/flutter_blue_plus_scanner_controller.dart
new file mode 100644
index 0000000..b6f9dfc
--- /dev/null
+++ b/lib/control/flutter_blue_plus_scanner_controller.dart
@@ -0,0 +1,44 @@
+import 'dart:async';
+import 'package:badge/control/scanner_controller_impl.dart';
+import 'package:badge/model/flutter_blue_plus_device.dart';
+import 'package:badge/model/device.dart';
+import 'package:badge/control/scanner_controller.dart';
+import 'package:flutter_blue_plus/flutter_blue_plus.dart';
+
+class FlutterBluePlusScannerController extends ScannerControllerImpl {
+  final StreamController<List<Device>> _scanResultsController =
+      StreamController<List<Device>>.broadcast();
+
+  @override
+  Stream<List<Device>> get scanResultsStream => _scanResultsController.stream;
+
+  @override
+  Future<void> startScan({
+    Duration timeout = const Duration(seconds: 5),
+  }) async {
+    stopScan();
+    super.setStatus(ScanStatus.scanning);
+
+    var subscription = FlutterBluePlus.scanResults.listen((results) {
+      List<Device> devices = results
+          .map((d) => FlutterBluePlusDevice.fromScan(d))
+          .toList();
+      _scanResultsController.add(devices);
+    });
+    // either this, or the cancel in the finally block, should do the same?
+    FlutterBluePlus.cancelWhenScanComplete(subscription);
+    await FlutterBluePlus.startScan(timeout: Duration(seconds: 5));
+    await FlutterBluePlus.isScanning.where((val) => val == false).first;
+  }
+
+  @override
+  Future<void> stopScan() async {
+    await FlutterBluePlus.stopScan();
+  }
+
+  @override
+  void dispose() {
+    stopScan().ignore();
+    _scanResultsController.close();
+  }
+}
diff --git a/lib/first_where_ext.dart b/lib/first_where_ext.dart
new file mode 100644
index 0000000..7e297ff
--- /dev/null
+++ b/lib/first_where_ext.dart
@@ -0,0 +1,9 @@
+extension FirstWhereExt<T> on List<T> {
+  /// The first element satisfying [test], or `null` if there are none.
+  T? firstWhereOrNull(bool Function(T element) test) {
+    for (final element in this) {
+      if (test(element)) return element;
+    }
+    return null;
+  }
+}
diff --git a/lib/model/flutter_blue_plus_device.dart b/lib/model/flutter_blue_plus_device.dart
new file mode 100644
index 0000000..8a3619b
--- /dev/null
+++ b/lib/model/flutter_blue_plus_device.dart
@@ -0,0 +1,30 @@
+import 'package:badge/model/device.dart';
+import 'package:flutter_blue_plus/flutter_blue_plus.dart';
+
+class FlutterBluePlusDevice implements Device {
+  final ScanResult scanResult;
+
+  @override
+  String? get address => scanResult.device.remoteId.str;
+
+  @override
+  String? get name => firstGiven([
+    scanResult.device.advName,
+    scanResult.device.platformName,
+    "<Unknown>",
+  ]);
+
+  @override
+  int? get rssi => scanResult.rssi;
+
+  FlutterBluePlusDevice._(this.scanResult);
+
+  static FlutterBluePlusDevice fromScan(ScanResult scanResult) {
+    var bleDevice = FlutterBluePlusDevice._(scanResult);
+    return bleDevice;
+  }
+}
+
+String firstGiven(List<String> list) {
+  return list.firstWhere((s) => s.isNotEmpty, orElse: () => "");
+}