Configure hosting by Swift's enum

enum-set-host.swift

enum Host {
  case Staging = “http://staging.myblog.com/api”
  case Production = “https://myblog.com/api”
}

class API {
  class var host: Host
  func blog(…) -> (…) {
    let apiPath = “\(API.host.rawValue)/blog”
    ...
  }
}