Converted observer to behaviorsubject

projects/common-map/src/fm-map/services/geolocation.service.ts

@@ -1,5 +1,5 @@
 import { Injectable } from '@angular/core';
-import { Observer, Observable } from 'rxjs';
+import { Observer, Observable,BehaviorSubject } from 'rxjs';
 
 /**
  * GeolocationService class.
@@ -9,23 +9,15 @@ import { Observer, Observable } from 'rxjs';
 @Injectable()
 export class GeolocationService {
 
-  /**
-   * Tries HTML5 geolocation.
-   *
-   * Wraps the Geolocation API into an observable.
-   *
-   * @return An observable of Position
-   */
-  getCurrentPosition(): Observable<Position> {
-    return Observable.create((observer: Observer<Position>) => {
-      // Invokes getCurrentPosition method of Geolocation API.
+  private positionObserver$:BehaviorSubject<Position>  = new BehaviorSubject<Position>(null);
+
+  constructor() {
     navigator.geolocation.watchPosition(
       (position: Position) => {
-          observer.next(position);
+        this.positionObserver$.next(position);
       },
       (error: PositionError) => {
         console.debug('Geolocation service: ' + error.message);
-          //observer.error(error);
       },
       {
         enableHighAccuracy: true,
@@ -33,7 +25,10 @@ export class GeolocationService {
         maximumAge: 0
       }
     );
-    });
   }
 
+
+  getCurrentPosition(): Observable<Position> {
+    return this.positionObserver$;
+  }
 }