PublisherDelegate.swift

extension AppDelegate: PublisherDelegate {
  
  /// this method called when failure to track location
  func publisherOnError(error: Error) {
    print("track location failed, error: \(error.
    localizedDescription)")
  }
  
  /// this method called when location successfully tracked
  func publisherOnSuccessTracking() {
    print("location successfully tracked")
  }
  
  /// this controller used to show alert.
  func publisherControllreParent() -> UIViewController? {
    UIApplication.shared.windows.first(where: { $0.isKeyWindow })?.
    rootViewController
  }
}