[AltStoreCore] Caches Patreon session cookies from in-app browser

Allows us to download apps from locked Patreon posts.

AltStore.xcodeproj/project.pbxproj

@@ -357,6 +357,7 @@
 		D51AD27F29356B7B00967AAA /* ALTWrappedError.m in Sources */ = {isa = PBXBuildFile; fileRef = D51AD27D29356B7B00967AAA /* ALTWrappedError.m */; };
 		D51AD28029356B8000967AAA /* ALTWrappedError.m in Sources */ = {isa = PBXBuildFile; fileRef = D51AD27D29356B7B00967AAA /* ALTWrappedError.m */; };
 		D52A2F972ACB40F700BDF8E3 /* Logger+AltStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = D52A2F962ACB40F700BDF8E3 /* Logger+AltStore.swift */; };
+		D52B4ABF2AF183F0005991C3 /* WebViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D52B4ABE2AF183F0005991C3 /* WebViewController.swift */; };
 		D52C08EE28AEC37A006C4AE5 /* AppVersion.swift in Sources */ = {isa = PBXBuildFile; fileRef = D52C08ED28AEC37A006C4AE5 /* AppVersion.swift */; };
 		D52DD35E2AAA89A600A7F2B6 /* AltSign-Dynamic in Frameworks */ = {isa = PBXBuildFile; productRef = D52DD35D2AAA89A600A7F2B6 /* AltSign-Dynamic */; };
 		D52EF2BE2A0594550096C377 /* AppDetailCollectionViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = D52EF2BD2A0594550096C377 /* AppDetailCollectionViewController.swift */; };
@@ -976,6 +977,7 @@
 		D51AD27C29356B7B00967AAA /* ALTWrappedError.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = ALTWrappedError.h; sourceTree = "<group>"; };
 		D51AD27D29356B7B00967AAA /* ALTWrappedError.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = ALTWrappedError.m; sourceTree = "<group>"; };
 		D52A2F962ACB40F700BDF8E3 /* Logger+AltStore.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Logger+AltStore.swift"; sourceTree = "<group>"; };
+		D52B4ABE2AF183F0005991C3 /* WebViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = WebViewController.swift; sourceTree = "<group>"; };
 		D52C08ED28AEC37A006C4AE5 /* AppVersion.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppVersion.swift; sourceTree = "<group>"; };
 		D52E988928D002D30032BE6B /* AltStore 11.xcdatamodel */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcdatamodel; path = "AltStore 11.xcdatamodel"; sourceTree = "<group>"; };
 		D52EF2BD2A0594550096C377 /* AppDetailCollectionViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = AppDetailCollectionViewController.swift; sourceTree = "<group>"; };
@@ -1496,6 +1498,7 @@
 			isa = PBXGroup;
 			children = (
 				BF66EE8B2501AEB1007EE018 /* Keychain.swift */,
+				D52B4ABE2AF183F0005991C3 /* WebViewController.swift */,
 			);
 			path = Components;
 			sourceTree = "<group>";
@@ -3062,6 +3065,7 @@
 				D5FB28EE2ADDF89800A1C337 /* KnownSource.swift in Sources */,
 				BF66EED32501AECA007EE018 /* AltStore2ToAltStore3.xcmappingmodel in Sources */,
 				BF66EEA52501AEC5007EE018 /* Benefit.swift in Sources */,
+				D52B4ABF2AF183F0005991C3 /* WebViewController.swift in Sources */,
 				BF66EED22501AECA007EE018 /* AltStore4ToAltStore5.xcmappingmodel in Sources */,
 				D5A645252AF5BC7F0047D980 /* UserAccount.swift in Sources */,
 				D5189C022A01BC6800F44625 /* UserInfoValue.swift in Sources */,

AltStore/Settings/PatreonViewController.swift

@@ -191,7 +191,7 @@ private extension PatreonViewController
     
     @IBAction func authenticate(_ sender: UIBarButtonItem)
     {
-        PatreonAPI.shared.authenticate { (result) in
+        PatreonAPI.shared.authenticate(presentingViewController: self) { (result) in
             do
             {
                 let account = try result.get()
@@ -201,9 +201,12 @@ private extension PatreonViewController
                     self.update()
                 }
             }
-            catch ASWebAuthenticationSessionError.canceledLogin
+            catch is CancellationError
             {
-                // Ignore
+                // Clear in-app browser cache in case they are signed into wrong account.
+                Task<Void, Never>.detached {
+                    await PatreonAPI.shared.deleteAuthCookies()
+                }
             }
             catch
             {

AltStoreCore/Components/WebViewController.swift

@@ -0,0 +1,356 @@
+//
+//  WebViewController.swift
+//  AltStoreCore
+//
+//  Created by Riley Testut on 10/31/23.
+//  Copyright © 2023 Riley Testut. All rights reserved.
+//
+
+import UIKit
+import WebKit
+import Combine
+
+public protocol WebViewControllerDelegate: NSObject
+{
+    func webViewControllerDidFinish(_ webViewController: WebViewController)
+}
+
+public class WebViewController: UIViewController
+{
+    //MARK: Public Properties
+    public weak var delegate: WebViewControllerDelegate?
+    
+    // WKWebView used to display webpages
+    public private(set) var webView: WKWebView!
+    
+    public private(set) lazy var backButton: UIBarButtonItem = UIBarButtonItem(image: UIImage(systemName: "chevron.backward"), style: .plain, target: self, action: #selector(WebViewController.goBack(_:)))
+    public private(set) lazy var forwardButton: UIBarButtonItem = UIBarButtonItem(image: UIImage(systemName: "chevron.forward"), style: .plain, target: self, action: #selector(WebViewController.goForward(_:)))
+    public private(set) lazy var shareButton: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: .action, target: self, action: #selector(WebViewController.shareLink(_:)))
+    
+    public private(set) lazy var reloadButton: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: .refresh, target: self, action: #selector(WebViewController.refresh(_:)))
+    public private(set) lazy var stopLoadingButton: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: .stop, target: self, action: #selector(WebViewController.refresh(_:)))
+    
+    public private(set) lazy var doneButton: UIBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(WebViewController.dismissWebViewController(_:)))
+    
+    //MARK: Private Properties
+    private let progressView = UIProgressView()
+    private lazy var refreshButton: UIBarButtonItem = self.reloadButton
+    
+    private let initialReqest: URLRequest?
+    private var ignoreUpdateProgress: Bool = false
+    private var cancellables: Set<AnyCancellable> = []
+
+    public required init(request: URLRequest?, configuration: WKWebViewConfiguration = WKWebViewConfiguration())
+    {
+        self.initialReqest = request
+                
+        super.init(nibName: nil, bundle: nil)
+        
+        self.webView = WKWebView(frame: CGRectZero, configuration: configuration)
+        self.webView.allowsBackForwardNavigationGestures = true
+        
+        self.progressView.progressViewStyle = .bar
+        self.progressView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        self.progressView.progress = 0.5
+        self.progressView.alpha = 0.0
+        self.progressView.isHidden = true
+    }
+    
+    public convenience init(url: URL?, configuration: WKWebViewConfiguration = WKWebViewConfiguration())
+    {
+        if let url
+        {
+            let request = URLRequest(url: url)
+            self.init(request: request, configuration: configuration)
+        }
+        else
+        {
+            self.init(request: nil, configuration: configuration)
+        }
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    //MARK: UIViewController
+    
+    public override func loadView()
+    {
+        self.preparePipeline()
+        
+        if let request = self.initialReqest
+        {
+            self.webView.load(request)
+        }
+        
+        self.view = self.webView
+    }
+    
+    public override func viewDidLoad() 
+    {
+        super.viewDidLoad()
+        
+        self.navigationController?.isModalInPresentation = true
+        self.navigationController?.view.tintColor = .altPrimary
+        
+        if let navigationBar = self.navigationController?.navigationBar
+        {
+            navigationBar.scrollEdgeAppearance = navigationBar.standardAppearance
+        }
+        
+        if let toolbar = self.navigationController?.toolbar, #available(iOS 15, *)
+        {
+            toolbar.scrollEdgeAppearance = toolbar.standardAppearance
+        }
+    }
+    
+    public override func viewIsAppearing(_ animated: Bool)
+    {
+        super.viewIsAppearing(animated)
+        
+        if self.webView.estimatedProgress < 1.0
+        {
+            self.transitionCoordinator?.animate(alongsideTransition: { context in
+                self.showProgressBar(animated: true)
+            }) { context in
+                if context.isCancelled
+                {
+                    self.hideProgressBar(animated: false)
+                }
+            }
+        }
+        
+        self.navigationController?.setToolbarHidden(false, animated: false)
+        
+        self.update()
+    }
+    
+    public override func viewWillDisappear(_ animated: Bool)
+    {
+        super.viewWillDisappear(animated)
+        
+        var shouldHideToolbarItems = true
+        
+        if let toolbarItems = self.navigationController?.topViewController?.toolbarItems
+        {
+            if toolbarItems.count > 0
+            {
+                shouldHideToolbarItems = false
+            }
+        }
+        
+        if shouldHideToolbarItems
+        {
+            self.navigationController?.setToolbarHidden(true, animated: false)
+        }
+        
+        self.transitionCoordinator?.animate(alongsideTransition: { context in
+            self.hideProgressBar(animated: true)
+        }) { (context) in
+            if context.isCancelled && self.webView.estimatedProgress < 1.0
+            {
+                self.showProgressBar(animated: false)
+            }
+        }
+    }
+    
+    public override func didMove(toParent parent: UIViewController?)
+    {
+        super.didMove(toParent: parent)
+        
+        if parent == nil
+        {
+            self.webView.stopLoading()
+        }
+    }
+    
+    deinit
+    {
+        self.webView.stopLoading()
+    }
+}
+
+private extension WebViewController
+{
+    func preparePipeline()
+    {
+        self.webView.publisher(for: \.title, options: [.initial, .new])
+            .sink { [weak self] title in
+                self?.title = title
+            }
+            .store(in: &self.cancellables)
+        
+        self.webView.publisher(for: \.estimatedProgress, options: [.new])
+            .sink { [weak self] progress in
+                self?.updateProgress(progress)
+            }
+            .store(in: &self.cancellables)
+        
+        Publishers.Merge3(
+            self.webView.publisher(for: \.isLoading, options: [.new]),
+            self.webView.publisher(for: \.canGoBack, options: [.new]),
+            self.webView.publisher(for: \.canGoForward, options: [.new])
+        )
+        .sink { [weak self] _ in
+            self?.update()
+        }
+        .store(in: &self.cancellables)
+    }
+    
+    func update()
+    {
+        if self.webView.isLoading
+        {
+            self.refreshButton = self.stopLoadingButton
+        }
+        else
+        {
+            self.refreshButton = self.reloadButton
+        }
+        
+        self.backButton.isEnabled = self.webView.canGoBack
+        self.forwardButton.isEnabled = self.webView.canGoForward
+        
+        self.navigationItem.leftBarButtonItem = self.doneButton
+        self.navigationItem.rightBarButtonItem = self.refreshButton
+        
+        self.toolbarItems = [self.backButton, .fixedSpace(70), self.forwardButton, .flexibleSpace(), self.shareButton]
+    }
+    
+    func updateProgress(_ progress: Double)
+    {
+        if self.progressView.isHidden
+        {
+            self.showProgressBar(animated: true)
+        }
+        
+        if self.ignoreUpdateProgress
+        {
+            self.ignoreUpdateProgress = false
+            self.hideProgressBar(animated: true)
+        }
+        else if progress < Double(self.progressView.progress)
+        {
+            // If progress is less than self.progressView.progress, another webpage began to load before the first one completed
+            // In this case, we set the progress back to 0.0, and then wait until the next updateProgress, because it results in a much better animation
+            
+            self.progressView.setProgress(0.0, animated: false)
+        }
+        else
+        {
+            UIView.animate(withDuration: 0.4, animations: {
+                self.progressView.setProgress(Float(progress), animated: true)
+            }, completion: { (finished) in
+                if progress == 1.0
+                {
+                    // This delay serves two purposes. One, it keeps the progress bar on screen just a bit longer so it doesn't appear to disappear too quickly.
+                    // Two, it allows us to prevent the progress bar from disappearing if the user actually started loading another webpage before the current one finished loading.
+                    
+                    DispatchQueue.main.asyncAfter(deadline: .now() + 0.2) {
+                        if self.webView.estimatedProgress == 1.0
+                        {
+                            self.hideProgressBar(animated: true)
+                        }
+                    }
+                }
+            })
+        }
+    }
+    
+    func showProgressBar(animated: Bool)
+    {
+        let navigationBarBounds = self.navigationController?.navigationBar.bounds ?? .zero
+        self.progressView.frame = CGRect(x: 0, y: navigationBarBounds.height - self.progressView.bounds.height, width: navigationBarBounds.width, height: self.progressView.bounds.height)
+        
+        self.navigationController?.navigationBar.addSubview(self.progressView)
+        
+        self.progressView.setProgress(Float(self.webView.estimatedProgress), animated: false)
+        self.progressView.isHidden = false
+        
+        if animated
+        {
+            UIView.animate(withDuration: 0.4) {
+                self.progressView.alpha = 1.0
+            }
+        }
+        else
+        {
+            self.progressView.alpha = 1.0
+        }
+    }
+    
+    func hideProgressBar(animated: Bool)
+    {
+        if animated
+        {
+            UIView.animate(withDuration: 0.4, animations: {
+                self.progressView.alpha = 0.0
+            }, completion: { (finished) in
+                self.progressView.setProgress(0.0, animated: false)
+                self.progressView.isHidden = true
+                self.progressView.removeFromSuperview()
+            })
+        }
+        else
+        {
+            self.progressView.alpha = 0.0
+            
+            // Completion
+            self.progressView.setProgress(0.0, animated: false)
+            self.progressView.isHidden = true
+            self.progressView.removeFromSuperview()
+        }
+    }
+}
+
+@objc
+private extension WebViewController
+{
+    func goBack(_ sender: UIBarButtonItem)
+    {
+        self.webView.goBack()
+    }
+    
+    func goForward(_ sender: UIBarButtonItem)
+    {
+        self.webView.goForward()
+    }
+    
+    func refresh(_ sender: UIBarButtonItem)
+    {
+        if self.webView.isLoading
+        {
+            self.ignoreUpdateProgress = true
+            self.webView.stopLoading()
+        }
+        else
+        {
+            if let initialRequest = self.initialReqest, self.webView.url == nil && self.webView.backForwardList.backList.count == 0
+            {
+                self.webView.load(initialRequest)
+            }
+            else
+            {
+                self.webView.reload()
+            }
+        }
+    }
+    
+    func shareLink(_ sender: UIBarButtonItem)
+    {
+        let url = self.webView.url ?? (NSURL() as URL)
+        
+        let activityViewController = UIActivityViewController(activityItems: [url], applicationActivities: nil)
+        activityViewController.modalPresentationStyle = .popover
+        activityViewController.popoverPresentationController?.barButtonItem = sender
+        self.present(activityViewController, animated: true)
+    }
+    
+    func dismissWebViewController(_ sender: UIBarButtonItem)
+    {
+        self.delegate?.webViewControllerDidFinish(self)
+        
+        self.parent?.dismiss(animated: true)
+    }
+}

AltStoreCore/Patreon/PatreonAPI.swift

@@ -9,6 +9,7 @@
 import Foundation
 import AuthenticationServices
 import CoreData
+import WebKit
 
 private let clientID = "ZMx0EGUWe4TVWYXNZZwK_fbIK5jHFVWoUf1Qb-sqNXmT-YzAGwDPxxq7ak3_W5Q2"
 private let clientSecret = "1hktsZB89QyN69cB4R0tu55R4TCPQGXxvebYUUh7Y-5TLSnRswuxs6OUjdJ74IJt"
@@ -58,6 +59,10 @@ public class PatreonAPI: NSObject
     private let session = URLSession(configuration: .ephemeral)
     private let baseURL = URL(string: "https://www.patreon.com/")!
     
+    private var authHandlers = [(Result<PatreonAccount, Swift.Error>) -> Void]()
+    private var authContinuation: CheckedContinuation<URL, Error>?
+    private weak var webViewController: WebViewController?
+    
     private override init()
     {
         super.init()
@@ -66,19 +71,40 @@ public class PatreonAPI: NSObject
 
 public extension PatreonAPI
 {
-    func authenticate(completion: @escaping (Result<PatreonAccount, Swift.Error>) -> Void)
+    func authenticate(presentingViewController: UIViewController, completion: @escaping (Result<PatreonAccount, Swift.Error>) -> Void)
     {
-        var components = URLComponents(string: "/oauth2/authorize")!
+        Task<Void, Never>.detached { @MainActor in
-        components.queryItems = [URLQueryItem(name: "response_type", value: "code"),
+            guard self.authHandlers.isEmpty else {
-                                 URLQueryItem(name: "client_id", value: clientID),
+                self.authHandlers.append(completion)
-                                 URLQueryItem(name: "redirect_uri", value: "https://rileytestut.com/patreon/altstore")]
+                return
-        
+            }
-        let requestURL = components.url(relativeTo: self.baseURL)!
+            
-        
+            self.authHandlers.append(completion)
-        self.authenticationSession = ASWebAuthenticationSession(url: requestURL, callbackURLScheme: "altstore") { (callbackURL, error) in
+            
             do
             {
-                let callbackURL = try Result(callbackURL, error).get()
+                var components = URLComponents(string: "/oauth2/authorize")!
+                components.queryItems = [URLQueryItem(name: "response_type", value: "code"),
+                                         URLQueryItem(name: "client_id", value: clientID),
+                                         URLQueryItem(name: "redirect_uri", value: "https://rileytestut.com/patreon/altstore"),
+                                         URLQueryItem(name: "scope", value: "identity identity[email] identity.memberships campaigns.posts")]
+                
+                let requestURL = components.url(relativeTo: self.baseURL)
+                
+                let configuration = WKWebViewConfiguration()
+                configuration.setURLSchemeHandler(self, forURLScheme: "altstore")
+                configuration.websiteDataStore = .default()
+                
+                let webViewController = WebViewController(url: requestURL, configuration: configuration)
+                webViewController.delegate = self
+                self.webViewController = webViewController
+                
+                let callbackURL = try await withCheckedThrowingContinuation { continuation in
+                    self.authContinuation = continuation
+                    
+                    let navigationController = UINavigationController(rootViewController: webViewController)
+                    presentingViewController.present(navigationController, animated: true)
+                }
                 
                 guard
                     let components = URLComponents(url: callbackURL, resolvingAgainstBaseURL: false),
@@ -86,26 +112,45 @@ public extension PatreonAPI
                     let code = codeQueryItem.value
                 else { throw PatreonAPIError(.unknown) }
                 
-                self.fetchAccessToken(oauthCode: code) { (result) in
+                let (accessToken, refreshToken) = try await withCheckedThrowingContinuation { continuation in
-                    switch result
+                    self.fetchAccessToken(oauthCode: code) { result in
+                        continuation.resume(with: result)
+                    }
+                }
+                Keychain.shared.patreonAccessToken = accessToken
+                Keychain.shared.patreonRefreshToken = refreshToken
+                
+                let patreonAccount = try await withCheckedThrowingContinuation { continuation in
+                    self.fetchAccount { result in
+                        let result = result.map { AsyncManaged(wrappedValue: $0) }
+                        continuation.resume(with: result)
+                    }
+                }
+                
+                await self.saveAuthCookies()
+                
+                await patreonAccount.perform { patreonAccount in
+                    for callback in self.authHandlers
                     {
-                    case .failure(let error): completion(.failure(error))
+                        callback(.success(patreonAccount))
-                    case .success((let accessToken, let refreshToken)):
-                        Keychain.shared.patreonAccessToken = accessToken
-                        Keychain.shared.patreonRefreshToken = refreshToken
-                        
-                        self.fetchAccount(completion: completion)
                     }
                 }
             }
             catch
             {
-                completion(.failure(error))
+                for callback in self.authHandlers
+                {
+                    callback(.failure(error))
+                }
+            }
+            
+            self.authHandlers = []
+            
+            await MainActor.run {
+                self.webViewController?.dismiss(animated: true)
+                self.webViewController = nil
             }
         }
-        
-        self.authenticationSession?.presentationContextProvider = self
-        self.authenticationSession?.start()
     }
     
     func fetchAccount(completion: @escaping (Result<PatreonAccount, Swift.Error>) -> Void)
@@ -205,7 +250,10 @@ public extension PatreonAPI
                 Keychain.shared.patreonRefreshToken = nil
                 Keychain.shared.patreonAccountID = nil
                 
-                completion(.success(()))
+                Task<Void, Never>.detached {
+                    await self.deleteAuthCookies()
+                    completion(.success(()))
+                }
             }
             catch
             {
@@ -239,6 +287,56 @@ public extension PatreonAPI
     }
 }
 
+extension PatreonAPI
+{
+    private func saveAuthCookies() async
+    {
+        let cookieStore = await MainActor.run { WKWebsiteDataStore.default().httpCookieStore } // Must access from main actor
+        
+        let cookies = await cookieStore.allCookies()
+        for cookie in cookies where cookie.domain.lowercased().hasSuffix("patreon.com")
+        {
+            Logger.main.debug("Saving Patreon cookie \(cookie.name, privacy: .public): \(cookie.value, privacy: .private(mask: .hash)) (Expires: \(cookie.expiresDate?.description ?? "nil", privacy: .public))")
+            HTTPCookieStorage.shared.setCookie(cookie)
+        }
+    }
+    
+    public func deleteAuthCookies() async
+    {
+        Logger.main.info("Clearing Patreon cookie cache...")
+        
+        let cookieStore = await MainActor.run { WKWebsiteDataStore.default().httpCookieStore } // Must access from main actor
+                        
+        if let cookies = HTTPCookieStorage.shared.cookies(for: URL(string: "https://www.patreon.com")!)
+        {
+            for cookie in cookies
+            {
+                Logger.main.debug("Deleting Patreon cookie \(cookie.name, privacy: .public) (Expires: \(cookie.expiresDate?.description ?? "nil", privacy: .public))")
+                
+                await cookieStore.deleteCookie(cookie)
+                HTTPCookieStorage.shared.deleteCookie(cookie)
+            }
+            
+            Logger.main.info("Cleared Patreon cookie cache!")
+        }
+        else
+        {
+            Logger.main.info("No Patreon cookies to clear.")
+        }
+    }
+}
+
+extension PatreonAPI: WebViewControllerDelegate
+{
+    public func webViewControllerDidFinish(_ webViewController: WebViewController)
+    {
+        guard let authContinuation else { return }
+        self.authContinuation = nil
+        
+        authContinuation.resume(throwing: CancellationError())
+    }
+}
+
 private extension PatreonAPI
 {
     func fetchAccessToken(oauthCode: String, completion: @escaping (Result<(String, String), Swift.Error>) -> Void)
@@ -366,25 +464,25 @@ private extension PatreonAPI
     }
 }
 
-extension PatreonAPI: ASWebAuthenticationPresentationContextProviding
+extension PatreonAPI: WKURLSchemeHandler
 {
-    public func presentationAnchor(for session: ASWebAuthenticationSession) -> ASPresentationAnchor
+    public func webView(_ webView: WKWebView, start urlSchemeTask: WKURLSchemeTask)
     {
-        //TODO: Properly support multiple scenes.
+        guard let authContinuation else { return }
-        
+        self.authContinuation = nil
-        guard let windowScene = UIApplication.alt_shared?.connectedScenes.lazy.compactMap({ $0 as? UIWindowScene }).first else { return UIWindow() }
+                
-
+        if let callbackURL = urlSchemeTask.request.url
-        if #available(iOS 15, *), let keyWindow = windowScene.keyWindow
         {
-            return keyWindow
+            authContinuation.resume(returning: callbackURL)
         }
-        else if let delegate = windowScene.delegate as? UIWindowSceneDelegate,
+        else
-                let optionalWindow = delegate.window,
-                let window = optionalWindow
         {
-            return window
+            authContinuation.resume(throwing: URLError(.badURL))
         }
-
+    }
-        return UIWindow()
+    
+    public func webView(_ webView: WKWebView, stop urlSchemeTask: WKURLSchemeTask)
+    {
+        Logger.main.debug("WKWebView stopped handling url scheme.")
     }
 }