QR code: Integrate Eric's QR code scanner

Signed-off-by: Roopesh Chander <roop@roopc.net>

WireGuard/WireGuard/UI/iOS/QRScanViewController.swift

@@ -11,25 +11,21 @@ import CoreData
 import UIKit
 
 protocol QRScanViewControllerDelegate: class {
-    func didSave(tunnel: Tunnel, qrScanViewController: QRScanViewController)
+    func scannedQRCode(tunnelConfiguration: TunnelConfiguration, qrScanViewController: QRScanViewController)
 }
 
 class QRScanViewController: UIViewController {
-
-    private var viewContext: NSManagedObjectContext!
-    private weak var delegate: QRScanViewControllerDelegate?
+    weak var delegate: QRScanViewControllerDelegate?
     var captureSession: AVCaptureSession? = AVCaptureSession()
     let metadataOutput = AVCaptureMetadataOutput()
     var previewLayer: AVCaptureVideoPreviewLayer!
 
-    func configure(context: NSManagedObjectContext, delegate: QRScanViewControllerDelegate? = nil) {
-        viewContext = context
-        self.delegate = delegate
-    }
-
     override func viewDidLoad() {
         super.viewDidLoad()
 
+        self.title = "Scan QR code"
+        self.navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .cancel, target: self, action: #selector(cancelTapped))
+
         guard let videoCaptureDevice = AVCaptureDevice.default(for: .video),
             let videoInput = try? AVCaptureDeviceInput(device: videoCaptureDevice),
             let captureSession = captureSession,
@@ -69,8 +65,9 @@ class QRScanViewController: UIViewController {
 
     func scanDidComplete(withCode code: String) {
         do {
-            let tunnel = try Tunnel.fromConfig(code, context: viewContext)
-            delegate?.didSave(tunnel: tunnel, qrScanViewController: self)
+            let tunnelConfiguration = try WgQuickConfigFileParser.parse(code, name: "Scanned")
+            delegate?.scannedQRCode(tunnelConfiguration: tunnelConfiguration, qrScanViewController: self)
+            dismiss(animated: true, completion: nil)
         } catch {
             scanDidEncounterError(title: "Invalid Code", message: "The scanned code is not a valid WireGuard config file.")
         }
@@ -85,6 +82,9 @@ class QRScanViewController: UIViewController {
         captureSession = nil
     }
 
+    @objc func cancelTapped() {
+        dismiss(animated: true, completion: nil)
+    }
 }
 
 extension QRScanViewController: AVCaptureMetadataOutputObjectsDelegate {
@@ -101,7 +101,4 @@ extension QRScanViewController: AVCaptureMetadataOutputObjectsDelegate {
         AudioServicesPlaySystemSound(SystemSoundID(kSystemSoundID_Vibrate))
         scanDidComplete(withCode: stringValue)
     }
-
 }
-
-extension QRScanViewController: Identifyable {}

WireGuard/WireGuard/UI/iOS/TunnelsListTableViewController.swift

@@ -47,6 +47,11 @@ class TunnelsListTableViewController: UITableViewController {
         }
         alert.addAction(importFileAction)
 
+        let scanQRCodeAction = UIAlertAction(title: "Scan QR code", style: .default) { [weak self] (action) in
+            self?.presentViewControllerForScanningQRCode()
+        }
+        alert.addAction(scanQRCodeAction)
+
         let createFromScratchAction = UIAlertAction(title: "Create from scratch", style: .default) { [weak self] (action) in
             if let s = self, let tunnelsManager = s.tunnelsManager {
                 s.presentViewControllerForTunnelCreation(tunnelsManager: tunnelsManager, tunnelConfiguration: nil)
@@ -96,6 +101,14 @@ class TunnelsListTableViewController: UITableViewController {
         self.present(filePicker, animated: true)
     }
 
+    func presentViewControllerForScanningQRCode() {
+        let scanQRCodeVC = QRScanViewController()
+        scanQRCodeVC.delegate = self
+        let scanQRCodeNC = UINavigationController(rootViewController: scanQRCodeVC)
+        scanQRCodeNC.modalPresentationStyle = .fullScreen
+        self.present(scanQRCodeNC, animated: true)
+    }
+
     func showErrorAlert(title: String, message: String) {
         let okAction = UIAlertAction(title: "Ok", style: .default)
         let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
@@ -130,6 +143,14 @@ extension TunnelsListTableViewController: UIDocumentPickerDelegate {
     }
 }
 
+// MARK: QRScanViewControllerDelegate
+
+extension TunnelsListTableViewController: QRScanViewControllerDelegate {
+    func scannedQRCode(tunnelConfiguration: TunnelConfiguration, qrScanViewController: QRScanViewController) {
+        print("Scanned QR code") // TODO
+    }
+}
+
 // MARK: UITableViewDataSource
 
 extension TunnelsListTableViewController {