Push Notification Service

pushNotificatonService.js

import { Injectable } from '@angular/core';
import {
    Platform,
    AlertController
} from 'ionic-angular';
import {
    Push,
    PushObject
} from '@ionic-native/push';

@Injectable()
export class PushNotificationService {
    public registrationToken: string;

    constructor(private platform: Platform,
        private push: Push,
        public alertCtrl: AlertController) {
    }

    initPushNotification() {
        if (!this.platform.is('cordova')) {
            console.warn('Push notifications not initialized. Cordova is not available - Run in physical device');
            return;
        }

        const pushObject: PushObject = this.push.init({
            android: {
                senderID: 'senderId'
            },
            ios: {
                alert: "true",
                badge: "true",
                sound: "true",
                clearBadge: true
            }
        });
        
        pushObject.on('registration').subscribe((data) => {
            console.log('registration device with token', data.registrationId)
            this.registrationToken = data.registrationId;
        });
        
        pushObject.on('notification').subscribe((data) => {

            console.log('notification data', data)

            if (data.additionalData.foreground) {
                // if application open, show popup
                console.log('App is on foreground state');

            } else {
                //if user NOT using app and push notification comes
                //TODO: Your logic on click of push notification directly
                // this.nav.push(DetailsPage, { message: data.message });
                console.log('Push notification clicked');
            }

        });
        
        pushObject.on('error').subscribe((err) => {
            console.error('Error with Push plugin' + err)
        });
    }
}