refactor(spinner): spinner moved into services

src/app/theme/services/baThemeSpinner/baThemeSpinner.service.ts

@@ -0,0 +1,22 @@
+import {Injectable} from '@angular/core';
+
+@Injectable()
+export class BaThemeSpinner {
+
+  private _selector:string = 'preloader';
+  private _element:HTMLElement;
+
+  constructor() {
+    this._element = document.getElementById(this._selector);
+  }
+
+  public show():void {
+    this._element.style['display'] = 'block';
+  }
+
+  public hide(delay:number = 0):void {
+    setTimeout(() => {
+      this._element.style['display'] = 'none';
+    }, delay);
+  }
+}

src/app/theme/services/baThemeSpinner/index.ts

@@ -0,0 +1 @@
+export * from './baThemeSpinner.service';

src/app/theme/services/index.ts

@@ -1,2 +1,3 @@
 export * from './baImageLoader';
 export * from './baThemePreloader';
+export * from './baThemeSpinner';