position service

src/app/service/position.service.ts

@@ -0,0 +1,52 @@
+import {Injectable} from '@angular/core';
+import{Cord} from "../interface/cord";
+
+@Injectable({
+  providedIn: 'root'
+})
+export class positionService{
+  cord: Cord = { lat: 0, lon: 0 };
+
+  getDistanceBetweenCoordinates(lat1: number | undefined, lon1: number | undefined, lat2: number, lon2: number) {
+    if (lat1 === undefined || lon1 === undefined) {
+      console.log('lat1 or lon1 is undefined')
+      return 0;
+    }else{
+      const earthRadius = 6371; // Radius of the earth in km
+      const dLat = this.deg2rad(lat2 - lat1);  // deg2rad below
+      const dLon = this.deg2rad(lon2 - lon1);
+      const a =
+        Math.sin(dLat / 2) * Math.sin(dLat / 2) +
+        Math.cos(this.deg2rad(lat1)) * Math.cos(this.deg2rad(lat2)) *
+        Math.sin(dLon / 2) * Math.sin(dLon / 2)
+      ;
+      const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+      // Distance in km
+      return earthRadius * c;
+    }
+  }
+
+  deg2rad(deg: number) {
+    return deg * (Math.PI / 180)
+  }
+
+  async getLocation() {
+    console.log('get location');
+    return new Promise((resolve, reject) => {
+      if (navigator.geolocation) {
+        navigator.geolocation.getCurrentPosition((position) => {
+          const lat = position.coords.latitude;
+          const lon = position.coords.longitude;
+          this.cord = { lat, lon };
+          console.log(this.cord);
+          resolve(this.cord);
+        }, (error) => {
+          reject(error);
+        });
+      } else {
+        reject('Geolocation is not supported by this browser.');
+      }
+    });
+  }
+
+}