1 files changed, 84 insertions, 0 deletions
diff --git a/lib/provider.dart b/lib/provider.dart
new file mode 100644
index 0000000..c96c8e4
--- /dev/null
+++ b/lib/provider.dart
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: Apache-2.0
+
+import 'dart:async';
+import 'dart:math';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:latlong2/latlong.dart';
+
+// -------------------------------------------------------------
+final clockProvider = StateNotifierProvider<Clock, DateTime>((ref) {
+  return Clock();
+});
+
+class Clock extends StateNotifier<DateTime> {
+  late final Timer _timer;
+  Clock() : super(DateTime.now()) {
+    _timer = Timer.periodic(const Duration(seconds: 5), (_) {
+      state = DateTime.now();
+    });
+  }
+
+  @override
+  void dispose() {
+    _timer.cancel();
+    super.dispose();
+  }
+}
+
+// -------------------------------------------------------------
+class PolyLinesDB {
+  final List<LatLng> currPolyLineList;
+  final List<LatLng> polyLineList;
+  PolyLinesDB({required this.currPolyLineList, required this.polyLineList});
+  PolyLinesDB copyWith({
+    List<LatLng>? currPolyLineList,
+    List<LatLng>? polyLineList,
+  }) {
+    return PolyLinesDB(
+      currPolyLineList: currPolyLineList ?? this.currPolyLineList,
+      polyLineList: polyLineList ?? this.polyLineList,
+    );
+  }
+}
+
+class PolyLineNotifier extends StateNotifier<PolyLinesDB> {
+  static final PolyLinesDB initialvalue = PolyLinesDB(
+    currPolyLineList: [],
+    polyLineList: [],
+  );
+  PolyLineNotifier() : super(initialvalue);
+  void update({
+    List<LatLng>? currPolyLineList,
+    List<LatLng>? polyLineList,
+  }) {
+    state = state.copyWith(
+      currPolyLineList: currPolyLineList,
+      polyLineList: polyLineList,
+    );
+  }
+}
+
+final polyLineStateProvider =
+    StateNotifierProvider<PolyLineNotifier, PolyLinesDB>(
+  (ref) => PolyLineNotifier(),
+);
+
+// -------------------------------------------------------------
+
+class Gear {
+  static String parking = "P";
+  static String drive = "D";
+  static String neutral = "N";
+  static String reverse = "R";
+}
+
+double calculateDistance(point1, point2) {
+  double p = 0.017453292519943295;
+
+  double halfCosLatDiff = cos((point2.latitude - point1.latitude) * p) / 2;
+  double halfCosLngDiff = cos((point2.longitude - point1.longitude) * p) / 2;
+
+  double dist = 0.5 - halfCosLatDiff + cos(point1.latitude * p) * cos(point2.latitude * p) * (0.5 - halfCosLngDiff);
+
+  return 12742 * asin(sqrt(dist));
+}