Add distance to map lat lang

lib/dashboard.dart

@@ -68,7 +68,6 @@ class _DashboardState extends State<Dashboard> {
 
   Widget _dashBoard() {
 
-
     return Container(
       color: screenBackgroundColor,
       child: Column(

lib/order_tracking_page.dart

@@ -27,6 +27,8 @@ class OrderTrackingPageState extends State<OrderTrackingPage> {
   double latitude=0;
   double longitude=0;
   LocationData? currentLocation;
+  Location _location = Location();
+  String _reachTime = '';
 
   String googleAPiKey ="AIzaSyDJpK9RVhlBejtJu9xSGfneuTN6HOfJgSM";
 
@@ -40,6 +42,7 @@ class OrderTrackingPageState extends State<OrderTrackingPage> {
   @override
   void initState() {
     super.initState();
+    _getLocation();
     latitude=widget.lat;
     longitude=widget.lng;
     LatLng endLocation =  LatLng(widget.lat,widget.lng);
@@ -56,6 +59,50 @@ class OrderTrackingPageState extends State<OrderTrackingPage> {
     getDirections(endLocation); //fetch direction polylines from Google API
   }
 
+
+  Future<void> _getLocation() async {
+    try {
+      currentLocation = await _location.getLocation();
+    } catch (e) {
+      currentLocation = null;
+    }
+
+    // Calculate ETA using current location and destination coordinates
+    double eta = _calculateETA( startLocation.latitude, startLocation.longitude,latitude, longitude,);
+    // Convert ETA to readable format
+    String hours = eta.floor().toString();
+    String minutes = ((eta - eta.floor()) * 60).round().toString();
+    _reachTime = minutes;
+  }
+
+// Function to calculate ETA
+  double _calculateETA(double currentLat, double currentLng, double destinationLat, double destinationLng) {
+    // Algorithm to calculate ETA based on current location, destination coordinates, and traffic conditions
+    // You can use any algorithm or API to calculate ETA based on your requirements
+    // Here's an example algorithm:
+    double distance = _calculateDistance(currentLat, currentLng, destinationLat, destinationLng); // Calculate distance between current location and destination
+    double speed = 30.0; // Assuming an average speed of 30 km/h
+    double time = distance / speed; // Calculate time in hours
+    return time;
+  }
+
+// Function to calculate distance between two coordinates
+  double _calculateDistance(double lat1, double lng1, double lat2, double lng2) {
+    double rad = 0.017453292519943295; // Math.PI / 180
+    double cosLat1 = cos(lat1 * rad);
+    double cosLat2 = cos(lat2 * rad);
+    double sinLat1 = sin(lat1 * rad);
+    double sinLat2 = sin(lat2 * rad);
+    double cosLng1 = cos(lng1 * rad);
+    double cosLng2 = cos(lng2 * rad);
+    double sinLng1 = sin(lng1 * rad);
+    double sinLng2 = sin(lng2 * rad);
+    double c = cosLat1 * cosLat2 * cosLng2 * sinLng1 + cosLat1 * cosLat2 * sinLng2 * cosLng1 + sinLat1 * sinLat2;
+    double distance = 6371 * acos(c); // 6371 is the radius of the Earth in kilometers
+    return distance;
+  }
+
+
   getDirections(endLocation) async {
     markers.clear();
 
@@ -97,20 +144,6 @@ class OrderTrackingPageState extends State<OrderTrackingPage> {
     }
 
 
-  /*  if (result.status == "OK") {
-      final route = result.routes.first;
-      final leg = route.legs.first;
-
-      final distance = leg.distance?.text ?? '';
-      final duration = leg.duration?.text ?? '';
-
-      print('Distance: $distance');
-      print('Duration: $duration');
-    } else {
-      print('Error: ${result.errorMessage}');
-    }*/
-
-
 
 
 //polulineCoordinates is the List of longitute and latidtude.
@@ -191,7 +224,6 @@ class OrderTrackingPageState extends State<OrderTrackingPage> {
                 mapController.complete(controller);
               }
             },
-
           ),
 
           const SizedBox(
@@ -210,6 +242,29 @@ class OrderTrackingPageState extends State<OrderTrackingPage> {
                     ),
                   )
               )),
+
+        /*  Positioned(
+              bottom: 150,
+              left: 50,
+              child: Container(
+                  child: Card(
+                    child: Container(
+                        padding: EdgeInsets.all(20),
+                        child: Column(
+                          children: [
+                            currentLocation != null
+                                ? Text('Current location: (${latitude}, ${longitude})')
+                                : Text('Location not available'),
+                            SizedBox(height: 16),
+                            Text('Estimated time of arrival: $_reachTime'),
+                          ],
+                        )
+
+
+
+                    ),
+                  )
+              )),*/
         ],
       )