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class ProgressView: UIView, NibLoadable {

  // MARK: Properties
  var animationDuration = 0.3
  fileprivate(set) var isAnimating = false

  // MARK: - Overrides
  override func awakeFromNib() {
    super.awakeFromNib()

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// MARK: - ErrorAnimatable
extension ErrorView: ErrorAnimatable {

  func playAnimation() {
    self.isAnimating = true
  }

  func stopAnimation() {
    self.isAnimating = false
  }

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// MARK: - ErrorDisplayable
extension ErrorView: ErrorDisplayable {

  static func show<T: ErrorView>(
    fromViewController viewController: UIViewController,
    animated: Bool = true,
    completion: ((Bool) -> Swift.Void)? = nil) -> T {

    guard let subview = loadFromNib() as? T else {
      fatalError("The subview is expected to be of type \(T.self)")

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class ErrorView: UIView, NibLoadable {

  // MARK: Properties
  weak var delegate: ErrorViewDelegate?
  var animationDuration = 0.3
  fileprivate(set) var isAnimating = false

  // MARK: - Overrides
  override func awakeFromNib() {
    super.awakeFromNib()

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protocol ErrorAnimatable {
  func playAnimation()
  func stopAnimation()
}

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protocol ErrorViewDelegate: class {
  func errorView(_ errorView: ErrorView, didRetry sender: UIButton)
}

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protocol ErrorDisplayable {
  static func show<T: ErrorView>(
    fromViewController viewController: UIViewController,
    animated: Bool,
    completion: ((Bool) -> Swift.Void)?) -> T

  static func show<T: ErrorView>(
    fromView view: UIView,
    insets: UIEdgeInsets, animated: Bool,
    completion: ((Bool) -> Swift.Void)?) -> T

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// Type of screen and its error view to display
enum ErrorScreen {
  case home
  case details

  var errorView: ErrorView.Type? {
    switch self {
    default:
      return ErrorViewRetry.self
    }

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/// Specify the error display context when hasData is true : use the error message, or use data oriented priority
///
/// - dataOriented: For this type, the error message will show that data inconsistency is possible
/// - errorOriented: The error message always use the Error type localized message if available, default message if needed
enum ErrorContext {
  case dataOriented
  case errorOriented

}

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/// Errors prompting protocol at its core
protocol FailableCore {

  /// Show an error
  func showError(_ error: Swift.Error?)
}

/// Failable protocol to display error
protocol Failable: FailableCore {
  var errorScreenType: ErrorScreen? {get}