Add support for passkeys on login (#3996)

* WIP

Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com>

* WIP

Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com>

* Use ASWebAuthenticationSession

Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com>

* WIP

Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com>

* WIP

Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com>

---------

Signed-off-by: Milen Pivchev <milen.pivchev@gmail.com>

Author: mpivchev

Brand/Intro/NCIntroViewController.swift

@@ -22,6 +22,7 @@ class NCIntroViewController: UIViewController, UICollectionViewDataSource, UICol
     private var timer: Timer?
     private var textColor: UIColor = .white
     private var textColorOpponent: UIColor = .black
+    private var activeLoginProvider: NCLoginProvider?
 
     // MARK: - View Life Cycle
 
@@ -164,11 +165,12 @@ class NCIntroViewController: UIViewController, UICollectionViewDataSource, UICol
     }
 
     @IBAction func signupWithProvider(_ sender: Any) {
-        if let viewController = UIStoryboard(name: "NCLogin", bundle: nil).instantiateViewController(withIdentifier: "NCLoginProvider") as? NCLoginProvider {
-            viewController.controller = self.controller
-            viewController.initialURLString = NCBrandOptions.shared.linkloginPreferredProviders
-            self.navigationController?.pushViewController(viewController, animated: true)
-        }
+        let loginProvider = NCLoginProvider()
+        loginProvider.controller = self.controller
+        loginProvider.initialURLString = NCBrandOptions.shared.linkloginPreferredProviders
+        loginProvider.presentingViewController = self
+        loginProvider.startAuthentication()
+        self.activeLoginProvider = loginProvider
     }
 
     @IBAction func host(_ sender: Any) {

iOSClient/Login/NCLogin.swift

@@ -44,6 +44,7 @@ class NCLogin: UIViewController, UITextFieldDelegate, NCLoginQRCodeDelegate {
     private var p12Data: Data?
     private var p12Password: String?
     private var QRCodeCheck: Bool = false
+    private var activeLoginProvider: NCLoginProvider?
 
     // MARK: - View Life Cycle
 
@@ -338,12 +339,14 @@ class NCLogin: UIViewController, UITextFieldDelegate, NCLoginQRCodeDelegate {
                     // Login Flow V2
                     if error == .success, let token, let endpoint, let login {
                         nkLog(debug: "Successfully received login flow information.")
-                        let safariVC = NCLoginProvider()
-                        safariVC.initialURLString = login
-                        safariVC.uiColor = textColor
-                        safariVC.delegate = self
-                        safariVC.startPolling(loginFlowV2Token: token, loginFlowV2Endpoint: endpoint, loginFlowV2Login: login)
-                        navigationController?.pushViewController(safariVC, animated: true)
+                        let loginProvider = NCLoginProvider()
+                        loginProvider.initialURLString = login
+                        loginProvider.delegate = self
+                        loginProvider.controller = self.controller
+                        loginProvider.presentingViewController = self
+                        loginProvider.startPolling(loginFlowV2Token: token, loginFlowV2Endpoint: endpoint, loginFlowV2Login: login)
+                        loginProvider.startAuthentication()
+                        self.activeLoginProvider = loginProvider
                     }
                 }
             case .failure(let error):
@@ -506,5 +509,7 @@ extension NCLogin: NCLoginProviderDelegate {
     func onBack() {
         loginButton.isEnabled = true
         loginButton.hideSpinnerAndShowButton()
+        activeLoginProvider?.cancel()
+        activeLoginProvider = nil
     }
 }