loading spinner in ongoing process

src/providers/on-going-process/on-going-process.ts

@@ -1,14 +1,27 @@
 import { Injectable } from '@angular/core';
+import { LoadingController } from 'ionic-angular';
 
 @Injectable()
 export class OnGoingProcessProvider {
-
-  constructor() {
+  private loading: any;
+  constructor(
+    private loadingCtrl: LoadingController,
+  ) {
     console.log('Hello OnGoingProcessProvider Provider');
   }
 
   public set(processName: string, isOn: boolean, customHandler?: any) {
     console.log('TODO: OnGoingProcessProvider set()...');
+    if (isOn) {
+      this.loading = this.loadingCtrl.create({
+        content: processName
+      });
+      this.loading.present();
+
+    }
+    else {
+      this.loading.dismiss();
+    }
   }
 
 }