Type-safe routes in Swift

routes.swift

//
//  main.swift
//  Routes
//
//  Created by Chris Eidhof on 17/08/14.
//  Copyright (c) 2014 Chris Eidhof. All rights reserved.
//

import Foundation

enum Github {
    case Zen
    case UserProfile(String)
}

protocol Path {
    var path : String { get }
}

extension Github : Path {
    var path: String {
        switch self {
        case .Zen: return "/zen"
        case .UserProfile(let name): return "/users/\(name)"
        }
    }
}

let sample = Github.UserProfile("ashfurrow")

println(sample.path) // Prints "/users/ashfurrow"

// So far, so good

protocol Moya : Path {
    var baseURL: NSURL { get }
    var sampleData: String { get } // Probably JSON would be better than AnyObject
}

extension Github : Moya {
    var baseURL: NSURL { return NSURL(string: "https://api.github.com") }
    var sampleData: String {
        switch self {
        case .Zen: return "Half measures are as bad as nothing at all."
        case .UserProfile(let name): return "{login: \"\(name)\", id: 100}"
        }
    }
}

func url(route: Moya) -> NSURL {
    return route.baseURL.URLByAppendingPathComponent(route.path)
}

println(url(sample)) // prints https://api.github.com/users/ashfurrow