Exif Orientation from current device orientation

ExifOrientation.swift

var exifOrientation: Int {
  let exifOrientation: DeviceOrientation
  enum DeviceOrientation: Int {
    case top0ColLeft = 1
    case top0ColRight = 2
    case bottom0ColRight = 3
    case bottom0ColLeft = 4
    case left0ColTop = 5
    case right0ColTop = 6
    case right0ColBottom = 7
    case left0ColBottom = 8
  }

  switch UIDevice.current.orientation {
    case .portraitUpsideDown:
      exifOrientation = .left0ColBottom
    case .landscapeLeft:
      if isUsingFrontFacingCamera == true {
      exifOrientation = .bottom0ColRight
      } else {
      exifOrientation = .top0ColLeft
      }
    case .landscapeRight:
      if isUsingFrontFacingCamera == true {
        exifOrientation = .top0ColLeft
      } else {
        exifOrientation = .bottom0ColRight
      }
    default:
      exifOrientation = .right0ColTop
  }
  return exifOrientation.rawValue
}