ServiceLocator

protocol ServiceLocating {
  func getService<T>() -> T?
}

final class ServiceLocator: ServiceLocating {
  private lazy var services: Dictionary<String, Any> = [:]
  
  private func typeName(some: Any) -> String {
    return (some is Any.Type) ?
      "\(some)" : "\(type(of: some))"
  }
  
  func addService<T>(service: T) {
    let key = typeName(some: T.self)
    services[key] = service
  }
  
  func getService<T>() -> T? {
    let key = typeName(some: T.self)
    return services[key] as? T
  }
  
  public static let shared = ServiceLocator()
}