Add "controllers" for scanning

3 files changed, 39 insertions, 0 deletions

diff --git a/lib/control/scanner_controller.dart b/lib/control/scanner_controller.dart
new file mode 100644
index 0000000..75711d6
--- /dev/null
+++ b/lib/control/scanner_controller.dart
@@ -0,0 +1,16 @@
+import 'dart:async';
+
+import 'package:badge/model/device.dart';
+
+/// Represents the scan status.
+enum ScanStatus { idle, scanning, finished, error }
+
+/// Represents a scanner controller.
+/// It emits devices which may be connected to later.
+abstract class ScannerController {
+  Stream<List<Device>> get scanResultsStream;
+  Stream<ScanStatus> get statusStream;
+  Future<void> startScan({Duration timeout});
+  Future<void> stopScan();
+  void dispose();
+}
diff --git a/lib/control/scanner_controller_impl.dart b/lib/control/scanner_controller_impl.dart
new file mode 100644
index 0000000..e39aa6b
--- /dev/null
+++ b/lib/control/scanner_controller_impl.dart
@@ -0,0 +1,17 @@
+import 'dart:async';
+import 'package:badge/control/scanner_controller.dart';
+import 'package:meta/meta.dart';
+
+/// Helper class which provides the setStatus method.
+abstract class ScannerControllerImpl extends ScannerController {
+  final StreamController<ScanStatus> _scanStatusController =
+      StreamController<ScanStatus>.broadcast();
+
+  @override
+  Stream<ScanStatus> get statusStream => _scanStatusController.stream;
+
+  @protected
+  void setStatus(ScanStatus newStatus) {
+    _scanStatusController.add(newStatus);
+  }
+}
diff --git a/lib/model/device.dart b/lib/model/device.dart
new file mode 100644
index 0000000..98445fa
--- /dev/null
+++ b/lib/model/device.dart
@@ -0,0 +1,6 @@
+/// Represents a (badge) device to be connected to.
+abstract class Device {
+  String? get name;
+  String? get address;
+  int? get rssi;
+}