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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,180 @@ | ||
| import Foundation | ||
| import UIKit | ||
| import WebKit | ||
|
|
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| let AGWKWebViewControllerErrorDomain: String = "AGWKWebViewController" | ||
| let AGWKWebViewControllerErrorCodeCanceledLogin: Int = 1 | ||
|
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| protocol AGWKWebViewControllerPresentationContextProviding: AnyObject { | ||
| func presentationAnchor(for: AGWKWebViewController) -> UIWindow | ||
| } | ||
|
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| class AGWKWebViewController: UIViewController, WKNavigationDelegate { | ||
| typealias CompletionHandler = (URL?, Error?) -> Void | ||
| weak var presentationContextProvider: AGWKWebViewControllerPresentationContextProviding? | ||
| var navigationBarBackgroundColor: UIColor? | ||
| var navigationBarButtonTintColor: UIColor? | ||
|
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| private let url: URL | ||
| private let redirectURI: URL | ||
| private var completionHandler: CompletionHandler? | ||
| private let webView: WKWebView | ||
| private var result: URL? | ||
|
|
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| init(url: URL, redirectURI: URL, completionHandler: @escaping CompletionHandler) { | ||
| self.url = url | ||
| self.redirectURI = redirectURI | ||
| self.completionHandler = completionHandler | ||
|
|
||
| let configuration = WKWebViewConfiguration() | ||
| self.webView = WKWebView(frame: .zero, configuration: configuration) | ||
| self.webView.translatesAutoresizingMaskIntoConstraints = false | ||
| self.webView.allowsBackForwardNavigationGestures = true | ||
|
|
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| super.init(nibName: nil, bundle: nil) | ||
|
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| self.webView.navigationDelegate = self | ||
| } | ||
|
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| @available(*, unavailable) | ||
| required init?(coder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
|
|
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| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
|
|
||
| // Configure layout | ||
| self.view.addSubview(self.webView) | ||
| if #available(iOS 11.0, *) { | ||
| // Extend the web view to the top edge of the screen. | ||
| // WKWebView magically offset the content so that the content is not covered by the navigation bar initially. | ||
| self.webView.topAnchor.constraint(equalTo: self.view.topAnchor).isActive = true | ||
| self.webView.leadingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.leadingAnchor).isActive = true | ||
| self.webView.trailingAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.trailingAnchor).isActive = true | ||
| // Extend the web view to the bottom edge of the screen. | ||
| self.webView.bottomAnchor.constraint(equalTo: self.view.bottomAnchor).isActive = true | ||
| } | ||
|
|
||
| // Configure the bounce behavior | ||
| self.webView.scrollView.bounces = false | ||
| self.webView.scrollView.alwaysBounceVertical = false | ||
| self.webView.scrollView.alwaysBounceHorizontal = false | ||
|
|
||
| // Configure navigation bar appearance | ||
| if #available(iOS 13.0, *) { | ||
| let appearance = UINavigationBarAppearance() | ||
| appearance.configureWithTransparentBackground() | ||
| if let navigationBarBackgroundColor = self.navigationBarBackgroundColor { | ||
| appearance.backgroundColor = navigationBarBackgroundColor | ||
| } | ||
| self.navigationItem.standardAppearance = appearance | ||
| self.navigationItem.compactAppearance = appearance | ||
| self.navigationItem.scrollEdgeAppearance = appearance | ||
| if #available(iOS 15.0, *) { | ||
| self.navigationItem.compactScrollEdgeAppearance = appearance | ||
| } | ||
| } | ||
|
|
||
| // Configure back button | ||
| self.navigationItem.hidesBackButton = true | ||
| var backButton: UIBarButtonItem | ||
| if #available(iOS 13.0, *) { | ||
| let backButtonImage = UIImage(systemName: "chevron.backward") | ||
| backButton = UIBarButtonItem(image: backButtonImage, style: .plain, target: self, action: #selector(onTapBackButton)) | ||
| } else { | ||
| backButton = UIBarButtonItem(title: "<", style: .plain, target: self, action: #selector(onTapBackButton)) | ||
| } | ||
| if let navigationBarButtonTintColor = self.navigationBarButtonTintColor { | ||
| backButton.tintColor = navigationBarButtonTintColor | ||
| } | ||
| self.navigationItem.leftBarButtonItem = backButton | ||
|
|
||
| // Configure close button | ||
| var closeButton: UIBarButtonItem | ||
| if #available(iOS 13.0, *) { | ||
| let closeButtonImage = UIImage(systemName: "xmark") | ||
| closeButton = UIBarButtonItem(image: closeButtonImage, style: .plain, target: self, action: #selector(onTapCloseButton)) | ||
| } else { | ||
| closeButton = UIBarButtonItem(title: "X", style: .plain, target: self, action: #selector(onTapCloseButton)) | ||
| } | ||
| if let navigationBarButtonTintColor = self.navigationBarButtonTintColor { | ||
| closeButton.tintColor = navigationBarButtonTintColor | ||
| } | ||
| self.navigationItem.rightBarButtonItem = closeButton | ||
|
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||
| let request = URLRequest(url: self.url) | ||
| self.webView.load(request) | ||
| } | ||
|
|
||
| override func viewDidDisappear(_ animated: Bool) { | ||
| // We only call completion handler here because | ||
| // The view controller could be swiped to dismiss. | ||
| // viewDidDisappear is the most rebust way to detect whether the view controller is dismissed. | ||
| if let result = self.result { | ||
| self.completionHandler?(result, nil) | ||
| } else { | ||
| let err = NSError(domain: AGWKWebViewControllerErrorDomain, code: AGWKWebViewControllerErrorCodeCanceledLogin) | ||
| self.completionHandler?(nil, err) | ||
| } | ||
| self.completionHandler = nil | ||
| } | ||
|
|
||
| @objc private func onTapBackButton() { | ||
| if (self.webView.canGoBack) { | ||
| _ = self.webView.goBack() | ||
| } else { | ||
| self.cancel() | ||
| } | ||
| } | ||
|
|
||
| @objc private func onTapCloseButton() { | ||
| self.cancel() | ||
| } | ||
|
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| func cancel() { | ||
| self.dismissSelf() | ||
| } | ||
|
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| func start() { | ||
| if let presentationAnchor = self.presentationContextProvider?.presentationAnchor(for: self) { | ||
| let navigationController = UINavigationController(rootViewController: self) | ||
| // Use the configured modal presentation style. | ||
| navigationController.modalPresentationStyle = self.modalPresentationStyle | ||
| presentationAnchor.rootViewController?.present(navigationController, animated: true) | ||
| } | ||
| } | ||
|
|
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| private func dismissSelf() { | ||
| self.navigationController?.presentingViewController?.dismiss(animated: true) | ||
| } | ||
|
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| func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) { | ||
| if let navigationURL = navigationAction.request.url { | ||
| var parts = URLComponents(url: navigationURL, resolvingAgainstBaseURL: false) | ||
| parts?.query = nil | ||
| parts?.fragment = nil | ||
| if let partsString = parts?.string { | ||
| if partsString == self.redirectURI.absoluteString { | ||
| decisionHandler(.cancel) | ||
| self.result = navigationURL | ||
| self.dismissSelf() | ||
| return | ||
| } | ||
| } | ||
| } | ||
|
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||
| if #available(iOS 14.5, *) { | ||
| if navigationAction.shouldPerformDownload { | ||
| decisionHandler(.download) | ||
| return | ||
| } else { | ||
| decisionHandler(.allow) | ||
| return | ||
| } | ||
| } else { | ||
| decisionHandler(.allow) | ||
| return | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| import AuthenticationServices | ||
|
|
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| public class ASWebAuthenticationSessionUIImplementation: NSObject, UIImplementation, ASWebAuthenticationPresentationContextProviding { | ||
| public func openAuthorizationURL(url: URL, redirectURI: URL, shareCookiesWithDeviceBrowser: Bool, completion: @escaping CompletionHandler) { | ||
| let session = ASWebAuthenticationSession(url: url, callbackURLScheme: redirectURI.scheme!) { url, error in | ||
| if let error = error { | ||
| completion(.failure(wrapError(error: error))) | ||
| } | ||
| if let url = url { | ||
| completion(.success(url)) | ||
| } | ||
| } | ||
| if #available(iOS 13.0, *) { | ||
| session.prefersEphemeralWebBrowserSession = !shareCookiesWithDeviceBrowser | ||
| session.presentationContextProvider = self | ||
| } | ||
| session.start() | ||
| } | ||
|
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| public func presentationAnchor(for session: ASWebAuthenticationSession) -> ASPresentationAnchor { | ||
| UIApplication.shared.windows.filter { $0.isKeyWindow }.first! | ||
| } | ||
| } |
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