added basic methods to wrap ionic AlertController

src/providers/alert/alert.ts

@@ -1,5 +1,5 @@
-import { HttpClient } from '@angular/common/http';
 import { Injectable } from '@angular/core';
+import { AlertController } from 'ionic-angular/components/alert/alert-controller';
 
 /*
   Generated class for the AlertProvider provider.
@@ -10,8 +10,49 @@ import { Injectable } from '@angular/core';
 @Injectable()
 export class AlertProvider {
 
-  constructor(public http: HttpClient) {
-    console.log('Hello AlertProvider Provider');
-  }
+    constructor(private _alertCtrl: AlertController) {
+    }
+
+    public showSuccessAlert(message: string): void {
+        let successAlert = this._alertCtrl.create({
+            buttons: ["Ok"],
+            message: message,
+            enableBackdropDismiss: false,
+            title: "Success!"
+        });
+
+        successAlert.present();
+    }
+
+    public showErrorAlert(message: string): void {
+        let errorAlert = this._alertCtrl.create({
+            buttons: ["Ok"],
+            message: message,
+            enableBackdropDismiss: false,
+            title: "Error!",
+            subTitle: "An error occurred"
+        });
+
+        errorAlert.present();
+    }
+
+    public showPrompt(message: string, confirmHandler: (value: any) => boolean | void, cancelHandler: (value: any) => boolean | void): void {
+        let promptAlert = this._alertCtrl.create({
+            buttons: [{
+                role: "confirm",
+                handler: confirmHandler,
+                text: "Confirm"
+            }, {
+                role: "cancel",
+                handler: cancelHandler,
+                text: "Cancel"
+            }],
+            message: message,
+            enableBackdropDismiss: false,
+            title: "Please confirm your action"
+        });
+
+        promptAlert.present();
+    }
 
 }