tcpipSocket/Chat/Core/EnterRoomResponsePacket.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace Core
{
	public class EnterRoomResponsePacket : IPacket
	{
		public StatusCode Code { get; set; }

		public EnterRoomResponsePacket(StatusCode code)
		{
			Code = code;
		}

		public EnterRoomResponsePacket(byte[] buffer)
		{
			Code = (StatusCode)IPAddress.NetworkToHostOrder(BitConverter.ToInt32(buffer, 2));
		}

		public byte[] Serialize()
		{
			// 2bytes header
			// data: 2bytes packetType + code

			byte[] packetType = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)PacketType.EnterRoomResponse));
			byte[] code = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((int)Code));

			short dataSize = (short)(packetType.Length + code.Length);
			byte[] header = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(dataSize));

			byte[] buffer = new byte[2 + dataSize];

			int cursor = 0;
			Array.Copy(header, 0, buffer, cursor, header.Length);
			cursor += header.Length;

			Array.Copy(packetType, 0, buffer, cursor, packetType.Length);
			cursor += packetType.Length;

			Array.Copy(code, 0, buffer, cursor, code.Length);

			return buffer;
		}
	}
}