Delivery state described in Swift

delivery_state.swift

enum DeliveryState: StateType {
    case notStarted
    case settingUp(appId: AppId, 
                   serviceId: ServiceId, 
                   description: ServiceDescription? = null)
    case going(progres: DeliveryProgress)
    case idle(reason: Idle)
    case failed(error: Error)
    case finished(status: ServiceStatus)

    enum Idle {
        case waitingForConnection
        case waitingForServerResponse
        case waitingForNetworkConnection
        case waitingForReconnect (deviceId: DeviceId)
    }
}