kharrison

// Example of refactoring with protocols
// Original javascript version is from Refactoring (2nd Edition) by Martin Fowler
import Foundation

struct Play {
    enum Genre {
        case tragedy
        case comedy
    }

kharrison

public enum NetworkingError: Error {
    case unknown
    case unexpectedStatus(HTTPURLResponse)
}

extension URLSession {
    func load(_ url: URL,
        completionHandler: @escaping (Result<Data, Error>) -> Void)
        -> URLSessionDataTask {
        let task = dataTask(with: url) { data, response, error in