Firebase Cloud Messaging Manager

FCMManager.swift

//
//  FCMManager.swift
//  FirebaseExamples
//
//  Created by Bernardo Silva on 26/08/19.
//  Copyright © 2019 Bernardo. All rights reserved.
//

import Foundation
import UIKit
import Firebase

class FCMManager: NSObject, UNUserNotificationCenterDelegate {
    
    func registerForNotifications(application: UIApplication) {
        if #available(iOS 10.0, *) {
            // For iOS 10 display notification (sent via APNS)
            UNUserNotificationCenter.current().delegate = self
            
            let authOptions: UNAuthorizationOptions = [.alert, .badge, .sound]
            UNUserNotificationCenter.current().requestAuthorization(
                options: authOptions,
                completionHandler: {_, _ in })
        } else {
            let settings: UIUserNotificationSettings =
                UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
            application.registerUserNotificationSettings(settings)
        }
        
        application.registerForRemoteNotifications()
        Messaging.messaging().delegate = self
    }
    
    func getToken() {
        InstanceID.instanceID().instanceID { (result, error) in
            if let error = error {
                print("Error fetching remote instance ID: \(error)")
            } else if let result = result {
                print("Remote instance ID token: \(result.token)")
            }
        }
    }
    
}

extension FCMManager: MessagingDelegate {
    
    func messaging(_ messaging: Messaging, didReceiveRegistrationToken fcmToken: String) {
        print("Firebase registration token: \(fcmToken)")
        
        let dataDict:[String: String] = ["token": fcmToken]
        NotificationCenter.default.post(name: Notification.Name("FCMToken"), object: nil, userInfo: dataDict)
        // TODO: If necessary send token to application server.
        // Note: This callback is fired at each app startup and whenever a new token is generated.
    }

    
}