@IBOutlet var webView: WKWebView!

// https://developer.apple.com/documentation/uikit/uiviewcontroller/1621454-loadview

override func loadView() {

// https://developer.apple.com/documentation/webkit/wkwebviewconfiguration

let configuration = WKWebViewConfiguration()

// https://developer.apple.com/documentation/webkit/wkwebviewconfiguration/2875766-seturlschemehandler

configuration.setURLSchemeHandler(USchemeHandler(), forURLScheme: AppWebViewUrlScheme)

// https://developer.apple.com/documentation/webkit/wkusercontentcontroller

configuration.userContentController.add(self, name: "controller")

// https://developer.apple.com/documentation/webkit/wkwebview

self.webView = WKWebView(frame: .zero, configuration: configuration)

// https://developer.apple.com/documentation/webkit/wknavigationdelegate

self.webView.navigationDelegate = self

// https://webkit.org/blog/13936/enabling-the-inspection-of-web-content-in-apps/

if #available(macOS 13.3, iOS 16.4, tvOS 16.4, *) {

// https://developer.apple.com/documentation/webkit/wkwebview/4111163-inspectable/

self.webView.isInspectable = true

}

logger?.debug("\(#function, privacy: .public) - DEBUG mode: isInspectable = true")

view = webView

self.webView.scrollView.isScrollEnabled = false

self.webView.isOpaque = false

let backgroundColor = UIColor.init(red: (47/255.0), green: (51/255.0), blue: (55/255.0), alpha: 1.0)

view.setValue(backgroundColor, forKey: "backgroundColor")

self.webView.backgroundColor = backgroundColor

}

// https://developer.apple.com/documentation/uikit/uiviewcontroller/1621495-viewdidload

override func viewDidLoad() {

super.viewDidLoad()

webView.load(URLRequest(url: URL(string: "\(AppWebViewUrlScheme):///")!))

}

func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {

let appVersion = Bundle.main.infoDictionary?["CFBundleShortVersionString"] as? String ?? "??"

let buildNumber = Bundle.main.infoDictionary?["CFBundleVersion"] as? String ?? "??"

webView.evaluateJavaScript("APP.printVersion('v\(appVersion)', '(\(buildNumber))')")

webView.evaluateJavaScript("APP.printDirectory('\(getCurrentScriptsDirectoryString())')")

}

func webView(_ webView: WKWebView, decidePolicyFor navigationAction: WKNavigationAction, decisionHandler: @escaping (WKNavigationActionPolicy) -> Void) {

if navigationAction.navigationType == .linkActivated {

guard let url = navigationAction.request.url else {

decisionHandler(.allow)

return

}

// allow registration scheme

if url.scheme == AppWebViewUrlScheme {

decisionHandler(.allow)

return

}

// allow specified url prefixes

// let allowPrefixes = [

// "https://github.com/quoid/userscripts"

// ]

// for prefix in allowPrefixes {

// if url.absoluteString.lowercased().hasPrefix(prefix) {

// decisionHandler(.allow)

// return

// }

// }

// open from external app like safari

if UIApplication.shared.canOpenURL(url) {

UIApplication.shared.open(url)

decisionHandler(.cancel)

return

}

decisionHandler(.allow)

}

decisionHandler(.allow)

}

func userContentController(_ userContentController: WKUserContentController, didReceive message: WKScriptMessage) {

guard let name = message.body as? String else {

logger?.error("\(#function, privacy: .public) - Userscripts iOS received a message without a name")

return

}

if name == "CHANGE_DIRECTORY" {

// https://developer.apple.com/documentation/uikit/view_controllers/providing_access_to_directories

logger?.info("\(#function, privacy: .public) - Userscripts iOS has requested to set the readLocation")

let documentPicker = UIDocumentPickerViewController(forOpeningContentTypes: [.folder])

documentPicker.delegate = self

documentPicker.directoryURL = getDocumentsDirectory()

present(documentPicker, animated: true, completion: nil)

}

if name == "OPEN_DIRECTORY" {

guard var components = URLComponents(url: Preferences.scriptsDirectoryUrl, resolvingAgainstBaseURL: true) else {

return

}

components.scheme = "shareddocuments"

if let url = components.url, UIApplication.shared.canOpenURL(url) {

UIApplication.shared.open(url)

}

}

}

func documentPicker(_ controller: UIDocumentPickerViewController, didPickDocumentAt url: URL) {

Preferences.scriptsDirectoryUrl = url

webView.evaluateJavaScript("APP.printDirectory('\(getCurrentScriptsDirectoryString())')")

}