Task: Fixing rotated preview layer on a landscape oriented iPad

Signed-off-by: Vikas Chandra <[email protected]>

Closes: #42

ESPProvision/ESPProvisionManager.swift

@@ -210,7 +210,25 @@ public class ESPProvisionManager: NSObject, AVCaptureMetadataOutputObjectsDelega
                 return
             }
 
-            self.previewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession)
+            let aPreviewLayer = AVCaptureVideoPreviewLayer(session: self.captureSession)
+
+            if aPreviewLayer.connection?.isVideoOrientationSupported ?? false {
+
+                var interfaceOrientation:UIInterfaceOrientation = .portrait
+                var videoOrientation:AVCaptureVideoOrientation  = .portrait
+
+                if #available(iOS 13.0, *) {
+                    interfaceOrientation = UIApplication.shared.windows.first?.windowScene?.interfaceOrientation ?? .portrait
+
+                } else {
+                    interfaceOrientation = UIApplication.shared.statusBarOrientation
+                }
+
+                videoOrientation = interfaceOrientation.videoOrientation ?? videoOrientation
+                aPreviewLayer.connection?.videoOrientation = videoOrientation
+            }
+
+            self.previewLayer = aPreviewLayer
             self.previewLayer?.frame = scanView.layer.bounds
             self.previewLayer?.videoGravity = .resizeAspectFill
             scanView.layer.addSublayer(self.previewLayer!)
@@ -319,3 +337,15 @@ extension ESPProvisionManager: ESPBLETransportDelegate {
         self.scanCompletionHandler?(nil,.espDeviceNotFound)
     }
 }
+
+extension UIInterfaceOrientation {
+    var videoOrientation: AVCaptureVideoOrientation? {
+        switch self {
+        case .portraitUpsideDown: return .portraitUpsideDown
+        case .landscapeRight: return .landscapeRight
+        case .landscapeLeft: return .landscapeLeft
+        case .portrait: return .portrait
+        default: return nil
+        }
+    }
+}