import { MessageTypes } from "../common";
import { numberToUint16BE } from "../utilities/number";
import { packOutgoingPacket } from "./packet";

const MESSAGE_TYPE = numberToUint16BE(MessageTypes.Subscribe);

export interface SubscribeMessage {
  messageType: number;
}

/**
 * Create an outgoing subscribe (0x0000) packet.
 * @param properties The properties for the message.
 * @returns An outgoing subscribe (0x0000) packet.
 */
export function packSubscribeMessage(properties: SubscribeMessage): Uint8Array {
  const data = numberToUint16BE(properties.messageType);
  return packOutgoingPacket({
    messageType: MESSAGE_TYPE,
    data: data,
  });
}