refactor(googlemaps): throw warnings plugin_not_installed (#655)

* refactor(googlemaps): adjust imports to warnings console and delete @author comments

* refactor(googlemaps): throw warnings plugin_not_installed

* refactor(googlemaps): delete warnings of the methods added Promise.reject case plugin_not_instalet

src/plugins/googlemaps.ts

@@ -1,11 +1,6 @@
-import {Cordova, CordovaInstance, Plugin, InstanceProperty} from './plugin';
+import { Cordova, CordovaInstance, Plugin, InstanceProperty, getPlugin, pluginWarn } from './plugin';
 import { Observable } from 'rxjs/Observable';
 
-
-/**
- * @private
- * Created by Ibrahim on 3/29/2016.
- */
 declare var plugin: any;
 
 /**
@@ -88,12 +83,13 @@ export const GoogleMapsAnimation = {
  *   });
  * ```
  */
-@Plugin({
+let pluginMap = {
   pluginRef: 'plugin.google.maps.Map',
   plugin: 'cordova-plugin-googlemaps',
   repo: 'https://github.com/mapsplugin/cordova-plugin-googlemaps',
   install: 'ionic plugin add cordova-plugin-googlemaps --variable API_KEY_FOR_ANDROID="YOUR_ANDROID_API_KEY_IS_HERE" --variable API_KEY_FOR_IOS="YOUR_IOS_API_KEY_IS_HERE"'
-})
+};
+@Plugin(pluginMap)
 export class GoogleMap {
   _objectInstance: any;
 
@@ -106,8 +102,14 @@ export class GoogleMap {
   static isAvailable(): Promise<boolean> { return; }
 
   constructor(element: string|HTMLElement, options?: any) {
-    if (typeof element === 'string') element = document.getElementById(<string>element);
+    if (!!getPlugin('plugin.google.maps.Map')) {
-    this._objectInstance = plugin.google.maps.Map.getMap(element, options);
+      if (typeof element === 'string') {
+        element = document.getElementById(<string>element);
+      }
+      this._objectInstance = plugin.google.maps.Map.getMap(element, options);
+    } else {
+      pluginWarn(pluginMap);
+    }
   }
 
   /**
@@ -116,6 +118,12 @@ export class GoogleMap {
    * @return {Observable<any>}
    */
   on(event: any): Observable<any> {
+    if (!this._objectInstance) {
+      return new Observable((observer) => {
+        observer.error({ error: 'plugin_not_installed' });
+      });
+    }
+
     return new Observable(
       (observer) => {
         this._objectInstance.on(event, observer.next.bind(observer));
@@ -130,6 +138,9 @@ export class GoogleMap {
    * @return {Promise<any>}
    */
   one(event: any): Promise<any> {
+    if (!this._objectInstance) {
+      return Promise.reject({ error: 'plugin_not_installed' });
+    }
     return new Promise<any>(
       resolve => this._objectInstance.one(event, resolve)
     );
@@ -207,7 +218,10 @@ export class GoogleMap {
   @CordovaInstance({ sync: true })
   setAllGesturesEnabled(enabled: boolean): void { }
 
-  addMarker(options: GoogleMapsMarkerOptions): Promise<GoogleMapsMarker> {
+  addMarker(options: GoogleMapsMarkerOptions): Promise<GoogleMapsMarker | any> {
+    if (!this._objectInstance) {
+      return Promise.reject({ error: 'plugin_not_installed' });
+    }
     return new Promise<GoogleMapsMarker>(
       (resolve, reject) => {
         this._objectInstance.addMarker(options, (marker: any) => {
@@ -221,7 +235,10 @@ export class GoogleMap {
     );
   }
 
-  addCircle(options: GoogleMapsCircleOptions): Promise<GoogleMapsCircle> {
+  addCircle(options: GoogleMapsCircleOptions): Promise<GoogleMapsCircle | any> {
+    if (!this._objectInstance) {
+      return Promise.reject({ error: 'plugin_not_installed' });
+    }
     return new Promise<GoogleMapsCircle>(
       (resolve, reject) => {
         this._objectInstance.addCircle(options, (circle: any) => {
@@ -235,7 +252,10 @@ export class GoogleMap {
     );
   }
 
-  addPolygon(options: GoogleMapsPolygonOptions): Promise<GoogleMapsPolygon> {
+  addPolygon(options: GoogleMapsPolygonOptions): Promise<GoogleMapsPolygon | any> {
+    if (!this._objectInstance) {
+      return Promise.reject({ error: 'plugin_not_installed' });
+    }
     return new Promise<GoogleMapsPolygon>(
       (resolve, reject) => {
         this._objectInstance.addPolygon(options, (polygon: any) => {
@@ -249,7 +269,10 @@ export class GoogleMap {
     );
   }
 
-  addPolyline(options: GoogleMapsPolylineOptions): Promise<GoogleMapsPolyline> {
+  addPolyline(options: GoogleMapsPolylineOptions): Promise<GoogleMapsPolyline | any> {
+    if (!this._objectInstance) {
+      return Promise.reject({ error: 'plugin_not_installed' });
+    }
     return new Promise<GoogleMapsPolyline>(
       (resolve, reject) => {
         this._objectInstance.addPolyline(options, (polyline: any) => {
@@ -263,7 +286,10 @@ export class GoogleMap {
     );
   }
 
-  addTileOverlay(options: GoogleMapsTileOverlayOptions): Promise<GoogleMapsTileOverlay> {
+  addTileOverlay(options: GoogleMapsTileOverlayOptions): Promise<GoogleMapsTileOverlay | any> {
+    if (!this._objectInstance) {
+      return Promise.reject({ error: 'plugin_not_installed' });
+    }
     return new Promise<GoogleMapsTileOverlay>(
       (resolve, reject) => {
         this._objectInstance.addTileOverlay(options, (tileOverlay: any) => {
@@ -277,7 +303,10 @@ export class GoogleMap {
     );
   }
 
-  addGroundOverlay(options: GoogleMapsGroundOverlayOptions): Promise<GoogleMapsGroundOverlay> {
+  addGroundOverlay(options: GoogleMapsGroundOverlayOptions): Promise<GoogleMapsGroundOverlay | any> {
+    if (!this._objectInstance) {
+      return Promise.reject({ error: 'plugin_not_installed' });
+    }
     return new Promise<GoogleMapsGroundOverlay>(
       (resolve, reject) => {
         this._objectInstance.addGroundOverlay(options, (groundOverlay: any) => {
@@ -291,7 +320,10 @@ export class GoogleMap {
     );
   }
 
-  addKmlOverlay(options: GoogleMapsKmlOverlayOptions): Promise<GoogleMapsKmlOverlay> {
+  addKmlOverlay(options: GoogleMapsKmlOverlayOptions): Promise<GoogleMapsKmlOverlay | any> {
+    if (!this._objectInstance) {
+      return Promise.reject({ error: 'plugin_not_installed' });
+    }
     return new Promise<GoogleMapsKmlOverlay>(
       (resolve, reject) => {
         this._objectInstance.addKmlOverlay(options, (kmlOverlay: any) => {
@@ -942,9 +974,10 @@ export class Geocoder {
    * @param {GeocoderRequest} request Request object with either an address or a position
    * @returns {Promise<GeocoderResult[]>}
    */
-  static geocode(request: GeocoderRequest): Promise<GeocoderResult[]> {
+  static geocode(request: GeocoderRequest): Promise<GeocoderResult[] | any> {
     return new Promise<GeocoderResult[]>((resolve, reject) => {
       if (!plugin || !plugin.google || !plugin.google.maps || !plugin.google.maps.Geocoder) {
+        pluginWarn(pluginMap);
         reject({ error: 'plugin_not_installed' });
       } else {
         plugin.google.maps.Geocoder.geocode(request, resolve);