rpcerror.swift

func sendCommand(command: RpcCommand, controller: ControlNode) -> SignalProducer<AnyObject, RpcControllerError> {
	self.mac = controller.mac
	let (method, params) = command.rpcTuple
	return self.sendCommand(method, withParams: params).toSignalProducer()
		.ignoreNil()
		.map { $0["result"] }
		.mapError { (error: NSError) -> RpcControllerError in
			switch error.domain {
			case NSPOSIXErrorDomain:
				switch Int32(error.code) {
				case ETIMEDOUT:
					return .TimedOut(error.localizedDescription)
				case ECONNREFUSED, ECONNABORTED, ENETUNREACH:
					return .NetworkError(error.localizedDescription, error.code)
				default: break
				}
			case RPCErrorDomain:
				return .RpcError(error.localizedDescription, error.code)
			case NSCocoaErrorDomain:
				return .JsonError(error.localizedDescription)
			default: break
			}
			return .UnknownError(error.localizedDescription, error.code)
		}
}