Disable universal links support for QR code login (#23953)

Author: kean

RELEASE-NOTES.txt

@@ -17,7 +17,7 @@
 * [*] Integrate zoom transitions in Themes, Reader [#23945, #23947]
 * [*] Fix an issue with site icons cropped in share extensions [#23950]
 * [*] Enable fast deceleration for filters on the Discover tab [#23954]
-
+* [*] Disable universal links support for QR code login. You can only scan the codes using the app now. [#23953]
 
 25.6
 -----

WordPress/Classes/ViewRelated/QR Login/Coordinators/QRLoginCoordinator.swift

@@ -18,13 +18,13 @@ struct QRLoginCoordinator: QRLoginParentCoordinator {
 
     static func didHandle(url: URL) -> Bool {
         guard
-            let token = QRLoginURLParser(urlString: url.absoluteString).parse(),
+            let _ = QRLoginURLParser(urlString: url.absoluteString).parse(),
             let source = UIApplication.shared.leafViewController
         else {
             return false
         }
-
-        self.init(origin: .deepLink).showVerifyAuthorization(token: token, from: source)
+        self.init(origin: .deepLink).showCameraScanningView(from: source)
+        Notice(title: Strings.scanFromApp).post()
         return true
     }
 
@@ -34,10 +34,7 @@ struct QRLoginCoordinator: QRLoginParentCoordinator {
 
     func showVerifyAuthorization(token: QRLoginToken, from source: UIViewController? = nil) {
         let controller = QRLoginVerifyAuthorizationViewController()
-        controller.coordinator = QRLoginVerifyCoordinator(token: token,
-                                                          view: controller,
-                                                          parentCoordinator: self)
-
+        controller.coordinator = QRLoginVerifyCoordinator(token: token, view: controller, parentCoordinator: self)
         pushOrPresent(controller, from: source)
     }
 }
@@ -115,3 +112,7 @@ extension QRLoginCoordinator {
         QRLoginCoordinator(origin: origin).showVerifyAuthorization(token: token, from: source)
     }
 }
+
+private enum Strings {
+    static let scanFromApp = NSLocalizedString("qrLogin.codeHasToBeScannedFromTheAppNotice.title", value: "Please scan the code using the app", comment: "Informational notice title. Showed when you scan a code using a camera app outside of the app, which is not allowed.")
+}

WordPress/Classes/ViewRelated/QR Login/Coordinators/QRLoginScanningCoordinator.swift

@@ -4,6 +4,7 @@ class QRLoginScanningCoordinator: NSObject {
     let parentCoordinator: QRLoginParentCoordinator
     let view: QRLoginScanningView
     var cameraSession: QRCodeScanningSession
+    private var didHandleToken = false
 
     init(view: QRLoginScanningView, parentCoordinator: QRLoginParentCoordinator, cameraSession: QRCodeScanningSession = QRLoginCameraSession()) {
         self.view = view
@@ -48,6 +49,9 @@ extension QRLoginScanningCoordinator {
     }
 
     func didScanToken(_ token: QRLoginToken) {
+        guard !didHandleToken else { return }
+        didHandleToken = true // Prevents the subsequent captures.
+
         parentCoordinator.track(.qrLoginScannerScannedCode)
 
         // Give the user a tap to let them know they've successfully scanned the code