287 lines
14 KiB
Swift
287 lines
14 KiB
Swift
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final class QRCodeVC : UIViewController, UIPageViewControllerDataSource, UIPageViewControllerDelegate, OWSQRScannerDelegate {
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private let pageVC = UIPageViewController(transitionStyle: .scroll, navigationOrientation: .horizontal, options: nil)
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private var pages: [UIViewController] = []
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private var targetVCIndex: Int?
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private var tabBarTopConstraint: NSLayoutConstraint!
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// MARK: Settings
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override var preferredStatusBarStyle: UIStatusBarStyle { return isLightMode ? .default : .lightContent }
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// MARK: Components
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private lazy var tabBar: TabBar = {
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let tabs = [
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TabBar.Tab(title: NSLocalizedString("View My QR Code", comment: "")) { [weak self] in
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guard let self = self else { return }
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self.pageVC.setViewControllers([ self.pages[0] ], direction: .forward, animated: false, completion: nil)
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},
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TabBar.Tab(title: NSLocalizedString("Scan QR Code", comment: "")) { [weak self] in
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guard let self = self else { return }
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self.pageVC.setViewControllers([ self.pages[1] ], direction: .forward, animated: false, completion: nil)
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}
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]
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return TabBar(tabs: tabs)
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}()
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private lazy var viewMyQRCodeVC: ViewMyQRCodeVC = {
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let result = ViewMyQRCodeVC()
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result.qrCodeVC = self
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return result
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}()
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private lazy var scanQRCodePlaceholderVC: ScanQRCodePlaceholderVC = {
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let result = ScanQRCodePlaceholderVC()
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result.qrCodeVC = self
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return result
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}()
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private lazy var scanQRCodeWrapperVC: ScanQRCodeWrapperVC = {
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let message = NSLocalizedString("Scan someone's QR code to start a conversation with them", comment: "")
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let result = ScanQRCodeWrapperVC(message: message)
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result.delegate = self
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return result
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}()
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// MARK: Lifecycle
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override func viewDidLoad() {
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// Set gradient background
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view.backgroundColor = .clear
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let gradient = Gradients.defaultLokiBackground
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view.setGradient(gradient)
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// Set navigation bar background color
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let navigationBar = navigationController!.navigationBar
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navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
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navigationBar.shadowImage = UIImage()
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navigationBar.isTranslucent = false
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navigationBar.barTintColor = Colors.navigationBarBackground
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// Customize title
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let titleLabel = UILabel()
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titleLabel.text = NSLocalizedString("QR Code", comment: "")
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titleLabel.textColor = Colors.text
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titleLabel.font = .boldSystemFont(ofSize: Values.veryLargeFontSize)
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navigationItem.titleView = titleLabel
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// Set up page VC
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let hasCameraAccess = (AVCaptureDevice.authorizationStatus(for: .video) == .authorized)
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pages = [ viewMyQRCodeVC, (hasCameraAccess ? scanQRCodeWrapperVC : scanQRCodePlaceholderVC) ]
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pageVC.dataSource = self
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pageVC.delegate = self
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pageVC.setViewControllers([ viewMyQRCodeVC ], direction: .forward, animated: false, completion: nil)
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// Set up tab bar
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view.addSubview(tabBar)
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tabBar.pin(.leading, to: .leading, of: view)
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tabBarTopConstraint = tabBar.autoPinEdge(toSuperviewSafeArea: .top)
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view.pin(.trailing, to: .trailing, of: tabBar)
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// Set up page VC constraints
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let pageVCView = pageVC.view!
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view.addSubview(pageVCView)
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pageVCView.pin(.leading, to: .leading, of: view)
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pageVCView.pin(.top, to: .bottom, of: tabBar)
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view.pin(.trailing, to: .trailing, of: pageVCView)
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view.pin(.bottom, to: .bottom, of: pageVCView)
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let screen = UIScreen.main.bounds
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pageVCView.set(.width, to: screen.width)
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let height: CGFloat
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if #available(iOS 13, *) {
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height = navigationController!.view.bounds.height - navigationBar.height() - Values.tabBarHeight
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} else {
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let statusBarHeight = UIApplication.shared.statusBarFrame.height
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height = navigationController!.view.bounds.height - navigationBar.height() - Values.tabBarHeight - statusBarHeight
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}
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pageVCView.set(.height, to: height)
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viewMyQRCodeVC.constrainHeight(to: height)
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scanQRCodePlaceholderVC.constrainHeight(to: height)
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}
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override func viewDidAppear(_ animated: Bool) {
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super.viewDidAppear(animated)
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tabBarTopConstraint.constant = navigationController!.navigationBar.height()
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}
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// MARK: General
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func pageViewController(_ pageViewController: UIPageViewController, viewControllerBefore viewController: UIViewController) -> UIViewController? {
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guard let index = pages.firstIndex(of: viewController), index != 0 else { return nil }
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return pages[index - 1]
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}
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func pageViewController(_ pageViewController: UIPageViewController, viewControllerAfter viewController: UIViewController) -> UIViewController? {
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guard let index = pages.firstIndex(of: viewController), index != (pages.count - 1) else { return nil }
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return pages[index + 1]
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}
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fileprivate func handleCameraAccessGranted() {
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pages[1] = scanQRCodeWrapperVC
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pageVC.setViewControllers([ scanQRCodeWrapperVC ], direction: .forward, animated: false, completion: nil)
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}
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// MARK: Updating
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func pageViewController(_ pageViewController: UIPageViewController, willTransitionTo pendingViewControllers: [UIViewController]) {
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guard let targetVC = pendingViewControllers.first, let index = pages.firstIndex(of: targetVC) else { return }
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targetVCIndex = index
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}
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func pageViewController(_ pageViewController: UIPageViewController, didFinishAnimating isFinished: Bool, previousViewControllers: [UIViewController], transitionCompleted isCompleted: Bool) {
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guard isCompleted, let index = targetVCIndex else { return }
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tabBar.selectTab(at: index)
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}
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// MARK: Interaction
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@objc private func close() {
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dismiss(animated: true, completion: nil)
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}
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func controller(_ controller: OWSQRCodeScanningViewController, didDetectQRCodeWith string: String) {
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let hexEncodedPublicKey = string
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startNewPrivateChatIfPossible(with: hexEncodedPublicKey)
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}
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fileprivate func startNewPrivateChatIfPossible(with hexEncodedPublicKey: String) {
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if !ECKeyPair.isValidHexEncodedPublicKey(candidate: hexEncodedPublicKey) {
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let alert = UIAlertController(title: NSLocalizedString("Invalid Session ID", comment: ""), message: NSLocalizedString("Please check the Session ID and try again.", comment: ""), preferredStyle: .alert)
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alert.addAction(UIAlertAction(title: NSLocalizedString("OK", comment: ""), style: .default, handler: nil))
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presentAlert(alert)
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} else {
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let thread = TSContactThread.getOrCreateThread(contactId: hexEncodedPublicKey)
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presentingViewController?.dismiss(animated: true, completion: nil)
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SignalApp.shared().presentConversation(for: thread, action: .compose, animated: false)
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}
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}
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}
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private final class ViewMyQRCodeVC : UIViewController {
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weak var qrCodeVC: QRCodeVC!
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private var bottomConstraint: NSLayoutConstraint!
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private lazy var userHexEncodedPublicKey: String = {
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if let masterHexEncodedPublicKey = UserDefaults.standard.string(forKey: "masterDeviceHexEncodedPublicKey") {
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return masterHexEncodedPublicKey
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} else {
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return getUserHexEncodedPublicKey()
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}
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}()
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// MARK: Lifecycle
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override func viewDidLoad() {
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// Remove background color
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view.backgroundColor = .clear
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// Set up title label
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let titleLabel = UILabel()
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titleLabel.textColor = Colors.text
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titleLabel.font = .boldSystemFont(ofSize: isSmallScreen ? CGFloat(40) : Values.massiveFontSize)
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titleLabel.text = NSLocalizedString("Scan Me", comment: "")
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titleLabel.numberOfLines = 0
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titleLabel.textAlignment = .center
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titleLabel.lineBreakMode = .byWordWrapping
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// Set up QR code image view
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let qrCodeImageView = UIImageView()
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let qrCode = QRCode.generate(for: userHexEncodedPublicKey, hasBackground: true)
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qrCodeImageView.image = qrCode
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qrCodeImageView.contentMode = .scaleAspectFit
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qrCodeImageView.set(.height, to: isSmallScreen ? 180 : 240)
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qrCodeImageView.set(.width, to: isSmallScreen ? 180 : 240)
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// Set up QR code image view container
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let qrCodeImageViewContainer = UIView()
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qrCodeImageViewContainer.addSubview(qrCodeImageView)
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qrCodeImageView.center(.horizontal, in: qrCodeImageViewContainer)
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qrCodeImageView.pin(.top, to: .top, of: qrCodeImageViewContainer)
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qrCodeImageView.pin(.bottom, to: .bottom, of: qrCodeImageViewContainer)
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// Set up explanation label
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let explanationLabel = UILabel()
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explanationLabel.textColor = Colors.text
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explanationLabel.font = .systemFont(ofSize: Values.mediumFontSize)
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// let text = NSLocalizedString("This is your QR code. Other users can scan it to start a session with you.", comment: "")
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// let attributedText = NSMutableAttributedString(string: text)
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// attributedText.addAttribute(.font, value: UIFont.boldSystemFont(ofSize: Values.mediumFontSize), range: (text as NSString).range(of: "your unique public QR code"))
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// explanationLabel.attributedText = attributedText
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explanationLabel.text = NSLocalizedString("This is your QR code. Other users can scan it to start a session with you.", comment: "")
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explanationLabel.numberOfLines = 0
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explanationLabel.textAlignment = .center
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explanationLabel.lineBreakMode = .byWordWrapping
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// Set up share button
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let shareButton = Button(style: .regular, size: .large)
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shareButton.setTitle(NSLocalizedString("Share", comment: ""), for: UIControl.State.normal)
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shareButton.addTarget(self, action: #selector(shareQRCode), for: UIControl.Event.touchUpInside)
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// Set up share button container
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let shareButtonContainer = UIView()
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shareButtonContainer.addSubview(shareButton)
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shareButton.pin(.leading, to: .leading, of: shareButtonContainer, withInset: 80)
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shareButton.pin(.top, to: .top, of: shareButtonContainer)
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shareButtonContainer.pin(.trailing, to: .trailing, of: shareButton, withInset: 80)
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shareButtonContainer.pin(.bottom, to: .bottom, of: shareButton)
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// Set up stack view
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let stackView = UIStackView(arrangedSubviews: [ titleLabel, qrCodeImageViewContainer, explanationLabel, shareButtonContainer, UIView.vStretchingSpacer() ])
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stackView.axis = .vertical
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stackView.spacing = isSmallScreen ? Values.mediumSpacing : Values.largeSpacing
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stackView.alignment = .fill
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stackView.layoutMargins = UIEdgeInsets(top: Values.largeSpacing, left: Values.largeSpacing, bottom: Values.largeSpacing, right: Values.largeSpacing)
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stackView.isLayoutMarginsRelativeArrangement = true
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view.addSubview(stackView)
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stackView.pin(.leading, to: .leading, of: view)
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stackView.pin(.top, to: .top, of: view)
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view.pin(.trailing, to: .trailing, of: stackView)
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bottomConstraint = view.pin(.bottom, to: .bottom, of: stackView)
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// Set up width constraint
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view.set(.width, to: UIScreen.main.bounds.width)
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}
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// MARK: General
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func constrainHeight(to height: CGFloat) {
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view.set(.height, to: height)
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}
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// MARK: Interaction
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@objc private func shareQRCode() {
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let qrCode = QRCode.generate(for: userHexEncodedPublicKey, hasBackground: true)
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let shareVC = UIActivityViewController(activityItems: [ qrCode ], applicationActivities: nil)
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qrCodeVC.navigationController!.present(shareVC, animated: true, completion: nil)
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}
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}
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private final class ScanQRCodePlaceholderVC : UIViewController {
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weak var qrCodeVC: QRCodeVC!
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override func viewDidLoad() {
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// Remove background color
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view.backgroundColor = .clear
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// Set up explanation label
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let explanationLabel = UILabel()
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explanationLabel.textColor = Colors.text
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explanationLabel.font = .systemFont(ofSize: Values.smallFontSize)
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explanationLabel.text = NSLocalizedString("Session needs camera access to scan QR codes", comment: "")
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explanationLabel.numberOfLines = 0
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explanationLabel.textAlignment = .center
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explanationLabel.lineBreakMode = .byWordWrapping
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// Set up call to action button
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let callToActionButton = UIButton()
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callToActionButton.titleLabel!.font = .boldSystemFont(ofSize: Values.mediumFontSize)
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callToActionButton.setTitleColor(Colors.accent, for: UIControl.State.normal)
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callToActionButton.setTitle(NSLocalizedString("Enable Camera Access", comment: ""), for: UIControl.State.normal)
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callToActionButton.addTarget(self, action: #selector(requestCameraAccess), for: UIControl.Event.touchUpInside)
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// Set up stack view
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let stackView = UIStackView(arrangedSubviews: [ explanationLabel, callToActionButton ])
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stackView.axis = .vertical
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stackView.spacing = Values.mediumSpacing
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stackView.alignment = .center
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// Set up constraints
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view.set(.width, to: UIScreen.main.bounds.width)
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view.addSubview(stackView)
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stackView.pin(.leading, to: .leading, of: view, withInset: Values.massiveSpacing)
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view.pin(.trailing, to: .trailing, of: stackView, withInset: Values.massiveSpacing)
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let verticalCenteringConstraint = stackView.center(.vertical, in: view)
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verticalCenteringConstraint.constant = -16 // Makes things appear centered visually
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}
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func constrainHeight(to height: CGFloat) {
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view.set(.height, to: height)
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}
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@objc private func requestCameraAccess() {
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ows_ask(forCameraPermissions: { [weak self] hasCameraAccess in
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if hasCameraAccess {
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self?.qrCodeVC.handleCameraAccessGranted()
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} else {
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// Do nothing
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}
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})
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}
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}
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