feat(LazyMapsAPILoader): support region & language

closes #102
closes #125

src/services/maps-api-loader/lazy-maps-api-loader.ts

@@ -33,6 +33,22 @@ export class LazyMapsAPILoaderConfig {
  * Defines which Google Maps libraries should get loaded.
  */
  libraries: string[] = [];
+
+ /**
+ * The default bias for the map behavior is US.
+ * If you wish to alter your application to serve different map tiles or bias the
+ * application, you can overwrite the default behavior (US) by defining a `region`.
+ * See https://developers.google.com/maps/documentation/javascript/basics#Region
+ */
+ region: string = null;
+
+ /**
+ * The Google Maps API uses the browser's preferred language when displaying
+ * textual information. If you wish to overwrite this behavior and force the API
+ * to use a given language, you can use this setting.
+ * See https://developers.google.com/maps/documentation/javascript/basics#Language
+ */
+ language: string = null;
 }
 
 const DEFAULT_CONFIGURATION = new LazyMapsAPILoaderConfig();
@@ -90,6 +106,8 @@ export class LazyMapsAPILoader extends MapsAPILoader {
  const hostAndPath: string = this._config.hostAndPath || DEFAULT_CONFIGURATION.hostAndPath;
  const apiKey: string = this._config.apiKey || DEFAULT_CONFIGURATION.apiKey;
  const libraries: string[] = this._config.libraries || DEFAULT_CONFIGURATION.libraries;
+ const region: string = this._config.region || DEFAULT_CONFIGURATION.region;
+ const language: string = this._config.language || DEFAULT_CONFIGURATION.language;
  const queryParams: {[key: string]: string} = {
  v: this._config.apiVersion || DEFAULT_CONFIGURATION.apiKey,
  callback: callbackName
@@ -100,6 +118,12 @@ export class LazyMapsAPILoader extends MapsAPILoader {
  if (libraries != null && libraries.length > 0) {
  queryParams['libraries'] = libraries.join(',');
  }
+ if (region != null && region.length > 0) {
+ queryParams['region'] = region;
+ }
+ if (language != null && language.length > 0) {
+ queryParams['language'] = language;
+ }
  const params: string = Object.keys(queryParams)
  .map((k: string, i: number) => {
  let param = (i === 0) ? '?' : '&';