SceneDelegate.swift

// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import UIKit
import FirebaseAuth

classSceneDelegate:UIResponder,UIWindowSceneDelegate{
varwindow:UIWindow?

 lazy varauthNavController:UINavigationController={
letnavController=UINavigationController(rootViewController:AuthViewController())
 navController.view.backgroundColor =.systemBackground
return navController
}()

 lazy varuserNavController:UINavigationController={
letnavController=UINavigationController(rootViewController:UserViewController())
 navController.view.backgroundColor =.systemBackground
return navController
}()

 lazy vartabBarController:UITabBarController={
lettabBarController=UITabBarController()
 tabBarController.delegate = tabBarController
 tabBarController.view.backgroundColor =.systemBackground
return tabBarController
}()

func scene(_ scene:UIScene, willConnectTo session:UISceneSession,
 options connectionOptions:UIScene.ConnectionOptions){
guardlet windowScene =(scene as?UIWindowScene)else{return}

configureControllers()

 window =UIWindow(windowScene: windowScene)
 window?.rootViewController = tabBarController
 window?.makeKeyAndVisible()
}

 // Implementing this delegate method is needed when swizzling is disabled.
 // Without it, reCAPTCHA's login view controller will not dismiss.
func scene(_ scene:UIScene, openURLContexts URLContexts:Set<UIOpenURLContext>){
forurlContextin URLContexts {
leturl= urlContext.url
 _ =Auth.auth().canHandle(url)
}

 // URL not auth related; it should be handled separately.
}

func scene(_ scene:UIScene, continue userActivity:NSUserActivity){
iflet incomingURL = userActivity.webpageURL {
handleIncomingDynamicLink(incomingURL)
}
}

 // MARK: - Firebase 🔥

privatefunc handleIncomingDynamicLink(_ incomingURL:URL){
letlink= incomingURL.absoluteString

ifAuth.auth().isSignIn(withEmailLink: link){
 // Save the link as it will be used in the next step to complete login
UserDefaults.standard.set(link, forKey:"Link")

 // Post a notification to the PasswordlessViewController to resume authentication
NotificationCenter.default
.post(Notification(name:Notification.Name("PasswordlessEmailNotificationSuccess")))
}
}

 // MARK: - Private Helpers

privatefunc configureControllers(){
 authNavController.configureTabBar(
 title:"Authentication",
 systemImageName:"person.crop.circle.fill.badge.plus"
)
 userNavController.configureTabBar(title:"Current User", systemImageName:"person.fill")
 tabBarController.viewControllers =[authNavController, userNavController]
}
}