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Dactyloidae iOS initial commit
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wuggy
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291
mobile/ios/Client/Frontend/Browser/QRCodeViewController.swift
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291
mobile/ios/Client/Frontend/Browser/QRCodeViewController.swift
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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import Foundation
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import AVFoundation
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import SnapKit
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import Shared
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private struct QRCodeViewControllerUX {
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static let navigationBarBackgroundColor = UIColor.black
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static let navigationBarTitleColor = UIColor.white
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static let maskViewBackgroungColor = UIColor(colorLiteralRed: 0, green: 0, blue: 0, alpha: 0.5)
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static let isLightingNavigationItemColor = UIColor(colorLiteralRed: 0.45, green: 0.67, blue: 0.84, alpha: 1)
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}
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protocol QRCodeViewControllerDelegate {
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func didScanQRCodeWithURL(_ url: URL)
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func didScanQRCodeWithText(_ text: String)
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}
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class QRCodeViewController: UIViewController {
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var qrCodeDelegate: QRCodeViewControllerDelegate?
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fileprivate lazy var captureSession: AVCaptureSession = {
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let session = AVCaptureSession()
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session.sessionPreset = AVCaptureSessionPresetHigh
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return session
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}()
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private lazy var captureDevice: AVCaptureDevice? = {
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return AVCaptureDevice.defaultDevice(withMediaType: AVMediaTypeVideo)
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}()
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private var videoPreviewLayer: AVCaptureVideoPreviewLayer?
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private let scanLine: UIImageView = UIImageView(image: UIImage(named: "qrcode-scanLine"))
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private let scanBorder: UIImageView = UIImageView(image: UIImage(named: "qrcode-scanBorder"))
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private lazy var instructionsLabel: UILabel = {
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let label = UILabel()
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label.text = Strings.ScanQRCodeInstructionsLabel
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label.textColor = UIColor.white
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label.textAlignment = NSTextAlignment.center
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label.numberOfLines = 0
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return label
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}()
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private var maskView: UIView = UIView()
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private var isAnimationing: Bool = false
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private var isLightOn: Bool = false
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private var shapeLayer: CAShapeLayer = CAShapeLayer()
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private var scanRange: CGRect {
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let size = UIDevice.current.userInterfaceIdiom == .pad ?
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CGSize(width: view.frame.width / 2, height: view.frame.width / 2) :
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CGSize(width: view.frame.width / 3 * 2, height: view.frame.width / 3 * 2)
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var rect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
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rect.center = UIScreen.main.bounds.center
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return rect
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}
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private var scanBorderHeight: CGFloat {
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return UIDevice.current.userInterfaceIdiom == .pad ?
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view.frame.width / 2 : view.frame.width / 3 * 2
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}
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override func viewDidLoad() {
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super.viewDidLoad()
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guard let captureDevice = self.captureDevice else {
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dismiss(animated: false)
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return
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}
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self.navigationItem.title = Strings.ScanQRCodeViewTitle
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// Setup the NavigationBar
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self.navigationController?.navigationBar.barTintColor = QRCodeViewControllerUX.navigationBarBackgroundColor
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self.navigationController?.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: QRCodeViewControllerUX.navigationBarTitleColor]
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// Setup the NavigationItem
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self.navigationItem.leftBarButtonItem = UIBarButtonItem(image: UIImage(named: "qrcode-goBack"), style: UIBarButtonItemStyle.plain, target: self, action: #selector(goBack))
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self.navigationItem.leftBarButtonItem?.tintColor = UIColor.white
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self.navigationItem.rightBarButtonItem = UIBarButtonItem(image: UIImage(named: "qrcode-light"), style: .plain, target: self, action: #selector(openLight))
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if captureDevice.hasTorch {
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self.navigationItem.rightBarButtonItem?.tintColor = UIColor.white
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} else {
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self.navigationItem.rightBarButtonItem?.tintColor = UIColor.gray
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self.navigationItem.rightBarButtonItem?.isEnabled = false
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}
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let getAuthorizationStatus = AVCaptureDevice.authorizationStatus(forMediaType: AVMediaTypeVideo)
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if getAuthorizationStatus != AVAuthorizationStatus.denied {
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setupCamera()
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} else {
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let alert = UIAlertController(title: "", message: Strings.ScanQRCodePermissionErrorMessage, preferredStyle: .alert)
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alert.addAction(UIAlertAction(title: Strings.ScanQRCodeErrorOKButton, style: .default, handler: nil))
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self.present(alert, animated: true, completion: nil)
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}
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maskView.backgroundColor = QRCodeViewControllerUX.maskViewBackgroungColor
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self.view.addSubview(maskView)
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self.view.addSubview(scanBorder)
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self.view.addSubview(scanLine)
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self.view.addSubview(instructionsLabel)
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setupConstraints()
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let rectPath = UIBezierPath(rect: UIScreen.main.bounds)
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rectPath.append(UIBezierPath(rect: scanRange).reversing())
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shapeLayer.path = rectPath.cgPath
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maskView.layer.mask = shapeLayer
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isAnimationing = true
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startScanLineAnimation()
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}
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override func viewWillDisappear(_ animated: Bool) {
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super.viewWillDisappear(animated)
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self.captureSession.stopRunning()
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stopScanLineAnimation()
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}
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private func setupConstraints() {
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maskView.snp.makeConstraints { (make) in
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make.edges.equalTo(self.view)
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}
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if UIDevice.current.userInterfaceIdiom == .pad {
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scanBorder.snp.makeConstraints { (make) in
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make.center.equalTo(self.view)
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make.width.height.equalTo(view.frame.width / 2)
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}
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} else {
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scanBorder.snp.makeConstraints { (make) in
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make.center.equalTo(self.view)
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make.width.height.equalTo(view.frame.width / 3 * 2)
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}
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}
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scanLine.snp.makeConstraints { (make) in
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make.left.equalTo(scanBorder.snp.left)
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make.top.equalTo(scanBorder.snp.top).offset(6)
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make.width.equalTo(scanBorder.snp.width)
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make.height.equalTo(6)
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}
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instructionsLabel.snp.makeConstraints { (make) in
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make.left.right.equalTo(self.view.layoutMarginsGuide)
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make.top.equalTo(scanBorder.snp.bottom).offset(30)
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}
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}
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func startScanLineAnimation() {
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if !isAnimationing {
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return
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}
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self.view.layoutIfNeeded()
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self.view.setNeedsLayout()
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UIView.animate(withDuration: 2.4, animations: {
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self.scanLine.snp.updateConstraints({ (make) in
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make.top.equalTo(self.scanBorder.snp.top).offset(self.scanBorderHeight - 6)
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})
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self.view.layoutIfNeeded()
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}) { (value: Bool) in
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self.scanLine.snp.updateConstraints({ (make) in
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make.top.equalTo(self.scanBorder.snp.top).offset(6)
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})
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self.perform(#selector(self.startScanLineAnimation), with: nil, afterDelay: 0)
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}
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}
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func stopScanLineAnimation() {
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isAnimationing = false
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}
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func goBack() {
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self.dismiss(animated: true, completion: nil)
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}
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func openLight() {
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guard let captureDevice = self.captureDevice else {
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return
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}
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if isLightOn {
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do {
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try captureDevice.lockForConfiguration()
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captureDevice.torchMode = AVCaptureTorchMode.off
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captureDevice.unlockForConfiguration()
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navigationItem.rightBarButtonItem?.image = UIImage(named: "qrcode-light")
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navigationItem.rightBarButtonItem?.tintColor = UIColor.white
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} catch {
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print(error)
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}
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} else {
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do {
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try captureDevice.lockForConfiguration()
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captureDevice.torchMode = AVCaptureTorchMode.on
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captureDevice.unlockForConfiguration()
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navigationItem.rightBarButtonItem?.image = UIImage(named: "qrcode-isLighting")
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navigationItem.rightBarButtonItem?.tintColor = QRCodeViewControllerUX.isLightingNavigationItemColor
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} catch {
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print(error)
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}
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}
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isLightOn = !isLightOn
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}
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func setupCamera() {
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guard let captureDevice = self.captureDevice else {
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dismiss(animated: false)
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return
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}
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do {
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let input = try AVCaptureDeviceInput(device: captureDevice)
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captureSession.addInput(input)
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} catch {
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print(error)
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}
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let output = AVCaptureMetadataOutput()
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if captureSession.canAddOutput(output) {
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captureSession.addOutput(output)
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output.setMetadataObjectsDelegate(self, queue: DispatchQueue.main)
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output.metadataObjectTypes = [AVMetadataObjectTypeQRCode]
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}
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if let videoPreviewLayer = AVCaptureVideoPreviewLayer(session: captureSession) {
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videoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill
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videoPreviewLayer.frame = UIScreen.main.bounds
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view.layer.addSublayer(videoPreviewLayer)
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self.videoPreviewLayer = videoPreviewLayer
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captureSession.startRunning()
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}
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}
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override func willAnimateRotation(to toInterfaceOrientation: UIInterfaceOrientation, duration: TimeInterval) {
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shapeLayer.removeFromSuperlayer()
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let rectPath = UIBezierPath(rect: UIScreen.main.bounds)
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rectPath.append(UIBezierPath(rect: scanRange).reversing())
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shapeLayer.path = rectPath.cgPath
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maskView.layer.mask = shapeLayer
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guard let videoPreviewLayer = self.videoPreviewLayer else {
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return
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}
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videoPreviewLayer.frame = UIScreen.main.bounds
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switch toInterfaceOrientation {
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case .portrait:
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videoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientation.portrait
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case .landscapeLeft:
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videoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientation.landscapeLeft
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case .landscapeRight:
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videoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientation.landscapeRight
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case .portraitUpsideDown:
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videoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientation.portraitUpsideDown
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default:
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videoPreviewLayer.connection.videoOrientation = AVCaptureVideoOrientation.portrait
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}
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}
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}
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extension QRCodeViewController: AVCaptureMetadataOutputObjectsDelegate {
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func captureOutput(_ captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [Any]!, from connection: AVCaptureConnection!) {
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if metadataObjects == nil || metadataObjects.count == 0 {
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self.captureSession.stopRunning()
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let alert = UIAlertController(title: "", message: Strings.ScanQRCodeInvalidDataErrorMessage, preferredStyle: .alert)
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alert.addAction(UIAlertAction(title: Strings.ScanQRCodeErrorOKButton, style: .default, handler: { (UIAlertAction) in
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self.captureSession.startRunning()
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}))
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self.present(alert, animated: true, completion: nil)
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} else {
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self.captureSession.stopRunning()
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stopScanLineAnimation()
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self.dismiss(animated: true, completion: {
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guard let metaData = metadataObjects.first as? AVMetadataMachineReadableCodeObject, let qrCodeDelegate = self.qrCodeDelegate, let text = metaData.stringValue else {
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Sentry.shared.sendWithStacktrace(message: "Unable to scan QR code", tag: .general)
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return
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}
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if let url = URIFixup.getURL(text) {
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qrCodeDelegate.didScanQRCodeWithURL(url)
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} else {
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qrCodeDelegate.didScanQRCodeWithText(text)
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}
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})
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}
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}
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}
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class QRCodeNavigationController: UINavigationController {
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override open var preferredStatusBarStyle: UIStatusBarStyle {
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return .lightContent
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}
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}
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