feat: add animation field to markers

Feature to set animation for map markers
Updated according to comments in #852

issue: Add animation field to markers #580

Author: iWebTouch

src/core/directives/google-map-marker.ts

@@ -99,9 +99,9 @@ export class SebmGoogleMapMarker implements OnDestroy, OnChanges, AfterContentIn
 
   /**
    * Which animation to play when marker is added to a map.
-   * This can be "bounce" or "drop"
+   * This can be 'BOUNCE' or 'DROP'
    */
-  animation: string;
+  animation: 'BOUNCE' | 'DROP' | null;
 
   /**
    * This event emitter gets emitted when the user clicks on the marker.

src/core/services/managers/marker-manager.ts

@@ -64,9 +64,13 @@ export class MarkerManager {
   }
 
   updateAnimation(marker: SebmGoogleMapMarker): Promise<void> {
-    return this._markers.get(marker).then((m: Marker) =>
-      m.setAnimation(google.maps.Animation[marker.animation])
-    );
+    return this._markers.get(marker).then((m: Marker) => {
+      if (typeof marker.animation === 'string') {
+        m.setAnimation(google.maps.Animation[marker.animation]);
+      } else {
+        m.setAnimation(marker.animation);
+      }
+    });
   }
 
   addMarker(marker: SebmGoogleMapMarker) {
@@ -78,13 +82,11 @@ export class MarkerManager {
       opacity: marker.opacity,
       visible: marker.visible,
       zIndex: marker.zIndex,
-      title: marker.title
+      title: marker.title,
+      animation: (typeof marker.animation === 'string') ? google.maps.Animation[marker.animation] : marker.animation
     });
-    this._markers.set(marker, markerPromise);
 
-    markerPromise.then((m: Marker) =>
-      m.setAnimation(google.maps.Animation[marker.animation])
-    );
+    this._markers.set(marker, markerPromise);
   }
 
   getNativeMarker(marker: SebmGoogleMapMarker): Promise<Marker> {