TF-1508 Adding "Camera not available" error to common scanner

TwoFAS/CodeSupport/Camera/Camera.swift

@@ -81,7 +81,9 @@ public final class Camera {
 
 extension Camera: CameraControllerDelegate {
     func cameraDidInitialize() {}
-    func cameraFailedToInitilize(with error: CameraController.CameraError) {}
+    func cameraFailedToInitilize(with error: CameraController.CameraError) {
+        Log("Camera - can't start: \(error)", module: .camera)
+    }
     func cameraStartedPreview() {
         delegate?.didStartScanning()
     }

TwoFAS/TwoFAS/Interactors/ModuleInteractorFactory.swift

@@ -161,7 +161,8 @@ final class ModuleInteractorFactory {
     func cameraScannerModuleInteractor() -> CameraScannerModuleInteracting {
         CameraScannerModuleInteractor(
             newCodeInteractor: InteractorFactory.shared.newCodeInteractor(),
-            pushNotificationPermission: InteractorFactory.shared.pushNotificationRegistrationInteractor()
+            pushNotificationPermission: InteractorFactory.shared.pushNotificationRegistrationInteractor(),
+            cameraPermissionInteractor: InteractorFactory.shared.cameraPermissionInteractor()
         )
     }
     

TwoFAS/TwoFAS/Root/Modules/Camera Scanner/Flow/CameraScannerFlowController.swift

@@ -44,6 +44,7 @@ protocol CameraScannerFlowControlling: AnyObject {
     func toPushPermissions(extensionID: ExtensionID)
     func toRename(currentName: String, secret: String)
     func toServiceWasCreated(serviceData: ServiceData)
+    func toCameraNotAvailable()
 }
 
 final class CameraScannerFlowController: FlowController {
@@ -189,6 +190,11 @@ extension CameraScannerFlowController: CameraScannerFlowControlling {
         viewController.present(alert, animated: true, completion: nil)
     }
     
+    func toCameraNotAvailable() {
+        let ac = AlertController.cameraNotAvailable
+        ac.show(animated: true, completion: nil)
+    }
+    
     func toPushPermissions(extensionID: ExtensionID) {
         guard let navi = viewController.navigationController else { return }
         navi.setNavigationBarHidden(true, animated: false)

TwoFAS/TwoFAS/Root/Modules/Camera Scanner/Interactor/CameraScannerModuleInteractor.swift

@@ -26,6 +26,10 @@ protocol CameraScannerModuleInteracting: AnyObject {
     var shouldRename: ((String, String) -> Void)? { get set }
     var wasUserAskedAboutPush: Bool { get }
     
+    func isCameraAvailable() -> Bool
+    func isCameraAllowed() -> Bool
+    func registerCamera(callback: @escaping (Bool) -> Void)
+    
     func addCode(_ code: Code, force: Bool)
     func codeExists(_ code: Code) -> Bool
     func filterImportableCodes(_ codes: [Code]) -> [Code] 
@@ -38,19 +42,39 @@ protocol CameraScannerModuleInteracting: AnyObject {
 final class CameraScannerModuleInteractor {
     private let newCodeInteractor: NewCodeInteracting
     private let pushNotificationPermission: PushNotificationRegistrationInteracting
+    private let cameraPermissionInteractor: CameraPermissionInteracting
     
     var serviceWasCreated: ((ServiceData) -> Void)?
     var shouldRename: ((String, String) -> Void)?
     
-    init(newCodeInteractor: NewCodeInteracting, pushNotificationPermission: PushNotificationRegistrationInteracting) {
+    init(
+        newCodeInteractor: NewCodeInteracting,
+        pushNotificationPermission: PushNotificationRegistrationInteracting,
+        cameraPermissionInteractor: CameraPermissionInteracting
+    ) {
         self.newCodeInteractor = newCodeInteractor
         self.pushNotificationPermission = pushNotificationPermission
+        self.cameraPermissionInteractor = cameraPermissionInteractor
         newCodeInteractor.serviceWasCreated = { [weak self] in self?.serviceWasCreated?($0) }
         newCodeInteractor.shouldRename = { [weak self] in self?.shouldRename?($0, $1) }
     }
 }
 
 extension CameraScannerModuleInteractor: CameraScannerModuleInteracting {
+    func isCameraAvailable() -> Bool {
+        cameraPermissionInteractor.isCameraAvailable
+    }
+    
+    func isCameraAllowed() -> Bool {
+        cameraPermissionInteractor.isCameraAllowed
+    }
+    
+    func registerCamera(callback: @escaping (Bool) -> Void) {
+        cameraPermissionInteractor.register { status in
+            callback(status == .granted)
+        }
+    }
+    
     var wasUserAskedAboutPush: Bool {
         pushNotificationPermission.wasUserAsked
     }

TwoFAS/TwoFAS/Root/Modules/Camera Scanner/Presenter/CameraScannerPresenter.swift

@@ -39,6 +39,20 @@ final class CameraScannerPresenter {
 }
 
 extension CameraScannerPresenter {
+    func viewDidAppear() {
+        if interactor.isCameraAvailable() {
+            if !interactor.isCameraAllowed() {
+                interactor.registerCamera { [weak self] isGranted in
+                    if !isGranted {
+                        self?.handleCameraNotAvailable()
+                    }
+                }
+            }
+        } else {
+            handleCameraNotAvailable()
+        }
+    }
+    
     func handleOpenGallery() {
         lockScanning = true
         flowController.toGallery()
@@ -137,6 +151,13 @@ extension CameraScannerPresenter {
         }
     }
     
+    func handleCameraNotAvailable() {
+        view?.enableOverlay()
+        view?.feedback()
+        
+        flowController.toCameraNotAvailable()
+    }
+    
     func handleCameraError(_ str: String) {
         view?.enableOverlay()
         view?.feedback()

TwoFAS/TwoFAS/Root/Modules/Camera Scanner/View/CameraScannerViewController.swift

@@ -66,6 +66,11 @@ final class CameraScannerViewController: UIViewController {
         navigationController?.setNavigationBarHidden(true, animated: false)
     }
     
+    override func viewDidAppear(_ animated: Bool) {
+        super.viewDidAppear(animated)
+        presenter.viewDidAppear()
+    }
+    
     override func viewWillDisappear(_ animated: Bool) {
         super.viewWillDisappear(animated)