GNSS eszközhöz való kapcsolódás és bluetooth kommunikáció refraktorálása külön osztályokba

2026-05-11 09:34:41 +02:00
parent 7192fa5322
commit f1a3753f36
6 changed files with 343 additions and 5 deletions
@@ -0,0 +1,104 @@
+// lib/services/gnss/gnss_service.dart
+import 'dart:async';
+import 'package:get/get.dart';
+import 'package:nmea/nmea.dart';
+import '../../gnss_sentences/gngga.dart';
+import 'gnss_connection.dart';
+import 'bt_serial_gnss_connection.dart';
+import 'ble_gnss_connection.dart';
+
+class GnssService extends GetxService {
+  static GnssService get to => Get.find();
+
+  GnssConnection? _connection;
+
+  // Reaktív állapot — a controllerek Obx-szel figyelhetik
+  final connectionState = GnssConnectionState.disconnected.obs;
+  final activeConnectionType = Rxn<GnssConnectionType>();
+
+  // Parsed NMEA adatok
+  final latitude = 0.0.obs;
+  final longitude = 0.0.obs;
+  final altitude = 0.0.obs;
+  final geoidSeparation = 0.0.obs;
+  final gpsQuality = 0.obs;
+  final utcFix = ''.obs;
+  final satelliteCount = 0.obs;
+  final hdop = 0.0.obs;
+
+  final NmeaDecoder _decoder = NmeaDecoder();
+  StreamSubscription? _nmeaSub;
+  StreamSubscription? _stateSub;
+
+  @override
+  void onInit() {
+    super.onInit();
+    _decoder.registerTalkerSentence('GGA', (l) => Gngga(raw: l));
+  }
+
+  // ── Kapcsolódás ──────────────────────────────────────────────────
+
+  Future<void> connectBtSerial(String macAddress) async {
+    await _disconnect();
+    _connection = BtSerialGnssConnection();
+    activeConnectionType.value = GnssConnectionType.btSerial;
+    await _doConnect(macAddress);
+  }
+
+  Future<void> connectBle(
+    String deviceId, {
+    String? serviceUuid,
+    String? txCharUuid,
+  }) async {
+    await _disconnect();
+    _connection = BleGnssConnection(
+      serviceUuid: serviceUuid ?? '6e400001-b5b3-f393-e0a9-e50e24dcca9e',
+      txCharUuid: txCharUuid ?? '6e400003-b5b3-f393-e0a9-e50e24dcca9e',
+    );
+    activeConnectionType.value = GnssConnectionType.ble;
+    await _doConnect(deviceId);
+  }
+
+  Future<void> _doConnect(String address) async {
+    _stateSub = _connection!.connectionState.listen((s) {
+      connectionState.value = s;
+    });
+    _nmeaSub = _connection!.nmeaLines.listen(_parseNmea);
+    await _connection!.connect(address);
+  }
+
+  Future<void> _disconnect() async {
+    await _nmeaSub?.cancel();
+    await _stateSub?.cancel();
+    await _connection?.disconnect();
+    _connection?.dispose();
+    _connection = null;
+  }
+
+  // ── NMEA parsing — egy helyen, nem háromban ──────────────────────
+
+  void _parseNmea(String line) {
+    if (!line.startsWith('\$GNGGA') && !line.startsWith('\$GPGGA')) return;
+
+    try {
+      final sentence = _decoder.decode(line);
+      if (sentence == null || !sentence.valid || sentence is! Gngga) return;
+      if (sentence.gpsQualityIndicator == 0) return;
+
+      latitude.value = sentence.latitude;
+      longitude.value = sentence.longitude;
+      altitude.value = sentence.altitudeAboveMeanSeaLevel;
+      geoidSeparation.value = sentence.geoidSeparation;
+      gpsQuality.value = sentence.gpsQualityIndicator;
+      utcFix.value = sentence.utcOfPositionFix;
+      satelliteCount.value = sentence.numberOfSvsInUse;
+      hdop.value = sentence.hdop;
+    } catch (_) {}
+  }
+
+  @override
+  void onClose() {
+    _disconnect();
+    super.onClose();
+  }
+}