feat: check man out of safe zone and changed zone color

CyberMongers · Apr 17, 2023 · 671927e · 671927e
1 parent ac6a985
commit 671927e
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Showing 2 changed files with 35 additions and 5 deletions.
diff --git a/lib/screens/homescreen.dart b/lib/screens/homescreen.dart
@@ -19,6 +19,7 @@ class RocketSocket extends StatefulWidget {
 class _RocketSocketState extends State<RocketSocket> {
   final mapController = MapController();
   LatLng? currentLocation;
+  LatLng? safeAreaLocation;
   bool? isTransmitting = false;
   WSServices wsServices = WSServices();
   Timer? timer;
@@ -30,7 +31,10 @@ class _RocketSocketState extends State<RocketSocket> {
   void initState() {
     setUserId();
     isTransmitting = false;
-
+    // dummy safe area location
+    safeAreaLocation = LatLng(22.5310, 88.3260);
+    // fake until current location is fetched
+    currentLocation = LatLng(22.5726, 88.3639);
     getCurrentLocation();
     super.initState();
   }
@@ -95,6 +99,7 @@ class _RocketSocketState extends State<RocketSocket> {
         .listen((Position? position) {
       setState(() {
         currentLocation = LatLng(position!.latitude, position.longitude);
+        // safeAreaLocation = currentLocation;
         mapController.move(currentLocation!, 15);
       });
     });
@@ -127,6 +132,11 @@ class _RocketSocketState extends State<RocketSocket> {
     // Temporary timer for testing
     debugPrint("Start Transmitting");
     timer = Timer.periodic(const Duration(seconds: 1), (timer) {
+      manOutOfBound = isManOutOfBound(
+          safeAreaLocation!.latitude,
+          safeAreaLocation!.longitude,
+          currentLocation!.latitude,
+          currentLocation!.longitude);
       setState(() {
         transmitLocation();
         getCurrentLocation();
@@ -162,7 +172,7 @@ class _RocketSocketState extends State<RocketSocket> {
                   child: FlutterMap(
                     mapController: mapController,
                     options: MapOptions(
-                      center: currentLocation ?? LatLng(22.5726, 88.3639),
+                      center: currentLocation,
                       //   bounds: LatLngBounds(
                       //       LatLng(29, 77.8963), LatLng(29.8659, 77.8963)),
                     ),
@@ -177,9 +187,9 @@ class _RocketSocketState extends State<RocketSocket> {
                         circles: [
                           CircleMarker(
                             // hardcoded area bounds for ground personal
-                            point: LatLng(22.5310, 88.3260),
-                            color: Colors.red.withOpacity(0.5),
-                            borderColor: Colors.red,
+                            point: safeAreaLocation!,
+                            color: Colors.green.withOpacity(0.5),
+                            borderColor: Colors.green,
                             borderStrokeWidth: 1,
                             useRadiusInMeter: true,
                             radius: 8000,

diff --git a/lib/utils/utils.dart b/lib/utils/utils.dart
@@ -1,3 +1,5 @@
+import 'dart:math';
+
 import 'package:flutter/material.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:uuid/uuid.dart';
@@ -15,3 +17,21 @@ getUserId() async {
   String? userId = prefs.getString("userId"); //returns null if doesn't exist
   return userId;
 }
+
+double calculateDistance(lat1, lon1, lat2, lon2) {
+  var p = 0.017453292519943295;
+  var c = cos;
+  var a = 0.5 -
+      c((lat2 - lat1) * p) / 2 +
+      c(lat1 * p) * c(lat2 * p) * (1 - c((lon2 - lon1) * p)) / 2;
+  // result in meters
+  return 12742 * asin(sqrt(a)) * 1000;
+}
+
+bool isManOutOfBound(lat1, lon1, lat2, lon2) {
+  var distance = calculateDistance(lat1, lon1, lat2, lon2);
+  if (distance >= 8000) {
+    return true;
+  }
+  return false;
+}