[ Firebase ] Hướng dẫn gửi notifications với Cloud Functions

// // AppDelegate.swift // Elite Condos Supplier // // Created by Khoa on 11/1/16. // Copyright © 2016 Khoa. All rights reserved. //

import UIKit import Firebase import FirebaseInstanceID import FirebaseMessaging @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate {
    
    
    var window: UIWindow?
    
    func application(\_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: \[UIApplicationLaunchOptionsKey: Any\]?) -> Bool {
        // Override point for customization after application launch.
        FIRApp.configure()
        if #available(iOS 8.0, \*) {
            let settings: UIUserNotificationSettings = UIUserNotificationSettings(types: \[.alert, .badge, .sound\], categories: nil)
            application.registerUserNotificationSettings(settings)
            application.registerForRemoteNotifications()
        } else {
            let types: UIRemoteNotificationType = \[.alert, .badge, .sound\]
            application.registerForRemoteNotifications(matching: types)
    
        }
    
        NotificationCenter.default.addObserver(self, selector: #selector(self.tokenRefreshNotification(notification:)), name: NSNotification.Name.firInstanceIDTokenRefresh, object: nil)
        return true
    }
    
    func applicationWillResignActive(\_ application: UIApplication) {
    
    }
    
    func applicationDidEnterBackground(\_ application: UIApplication) {
          }
    
    func applicationWillEnterForeground(\_ application: UIApplication) {
    
    }
    
    func applicationDidBecomeActive(\_ application: UIApplication) {
        UIApplication.shared.applicationIconBadgeNumber = 0
        connectToFCM()
           }
    
    func applicationWillTerminate(\_ application: UIApplication) {
    
    }
    
    func tokenRefreshNotification(notification: NSNotification) {
        if let token = FIRInstanceID.instanceID().token(){
            Api.User.updateTokenToDatabase(token: token, onSuccess: {
                UserDefaults.standard.setValue(token, forKey: "token")
                print("token in didRegister: \\(token)")
                self.connectToFCM()
            })
    
        }
    }
    func application(\_ application: UIApplication, didRegister notificationSettings: UIUserNotificationSettings) {
    
        if let token = FIRInstanceID.instanceID().token(){
            Api.User.updateTokenToDatabase(token: token, onSuccess: {
                UserDefaults.standard.setValue(token, forKey: "token")
                print("token in didRegister: \\(token)")
                self.connectToFCM()
            })
    
        }
    }
    func connectToFCM() {
        FIRMessaging.messaging().connect { (error) in
    
            if (error != nil) {
                print("Unable to connect to FCM \\(error.debugDescription)")
            } else {
                print("Connected to FCM")
    
            }
        }
    }

}

'use strict';

const functions = require('firebase-functions'); const admin = require('firebase-admin'); admin.initializeApp(functions.config().firebase);

// Moderates messages by lowering all uppercase messages and removing swearwords. exports.sendNotifications = functions.database .ref('/orders/{orderId}').onWrite(event => { const order = event.data.val();
    
    
    const orderId = event.params.orderId
    var statusName = "NOTACCEPTED";
    
    switch (order.status) {
      case 0:
        statusName = "NOTACCEPTED"
        break;
      case 1:
        statusName = "ONGOING"
        break;
      case 2:
        statusName = "CANCEL"
        break;
      case 3:
        statusName = "FINISHED"
        break;
      default:
        statusName = "REJECTED"
        break;
    }
    
    console.log('Current status: ', order.status);
    
    console.log('customer id', order.customerId);
    console.log('supplier id', order.supplierId);
    const customerRef = admin.database().ref(\`/customers/${order.customerId}\`).once('value');
    const supplierRef = admin.database().ref(\`/suppliers/${order.supplierId}\`).once('value');
    return Promise.all(\[customerRef, supplierRef\]).then(result => {
      const customer = result\[0\].val()
      const supplier = result\[1\].val()
      if (customer.token != null && supplier.token != null) {
    
        console.log('customer Token = ', customer.token);
        console.log('supplier Token = ', supplier.token);
    
        const payload = {
          notification: {
            title: \`Elite Condos Notifications\`,
            body: \`Đơn hàng #${orderId} đã thay đổi trạng thái:  ${statusName}\`,
            sound: "default",
            badge: "1"
          }
        };
        var tokens = \[customer.token, supplier.token\];
        console.log(' Tokens array = ', tokens);
        return admin.messaging().sendToDevice(tokens, payload).then(response => {
          console.log('response', response)
        })
      }
    
    })

});