chat function

Chat/Core/ChatPacket.cs

@@ -0,0 +1,74 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Core
+{
+	public class ChatPacket : IPacket
+	{
+		public string Message { get; private set; }
+		public string NickName { get; private set; }
+
+		public ChatPacket(string nickname, string message)
+		{
+			NickName = nickname;
+			Message = message;
+		}
+
+		public ChatPacket(byte[] buffer)
+		{
+			int cursor = 2;
+
+			short messageSize = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, cursor));
+			cursor += sizeof(short);
+
+			Message = Encoding.UTF8.GetString(buffer, cursor, messageSize);
+			cursor += messageSize;
+
+			short nicknameSize = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(buffer, cursor));
+			cursor += sizeof(short);
+
+			NickName = Encoding.UTF8.GetString(buffer, cursor, nicknameSize);
+		}
+
+		public byte[] Serialize()
+		{
+			// 2bytes header
+			// data: 2bytes packetType + 2bytes id size + id + 2bytes nickname size + nickname
+
+			byte[] packetType = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)PacketType.Chat));
+			byte[] message = Encoding.UTF8.GetBytes(Message);
+			byte[] messageSize = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)message.Length));
+			byte[] nickname = Encoding.UTF8.GetBytes(NickName);
+			byte[] nicknameSize = BitConverter.GetBytes(IPAddress.HostToNetworkOrder((short)nickname.Length));
+
+			short dataSize = (short)(packetType.Length + message.Length + messageSize.Length + nickname.Length + nicknameSize.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(messageSize, 0, buffer, cursor, messageSize.Length);
+			cursor += messageSize.Length;
+
+			Array.Copy(message, 0, buffer, cursor, message.Length);
+			cursor += message.Length;
+
+			Array.Copy(nicknameSize, 0, buffer, cursor, nicknameSize.Length);
+			cursor += nicknameSize.Length;
+
+			Array.Copy(nickname, 0, buffer, cursor, nickname.Length);
+
+			return buffer;
+		}
+	}
+}

Chat/Core/PServer.cs

@@ -76,13 +76,13 @@ namespace Core
 				{
 					LoginRequestPacket requestPacket = new LoginRequestPacket(dataBuffer);
 					
-					Clients.TryAdd(requestPacket.Id, clientSocket);
+					bool result = Clients.TryAdd(requestPacket.Id, clientSocket);
 					Console.WriteLine($"[{DateTime.Now}] LoginRequest - Id: {requestPacket.Id}, Nickname: {requestPacket.NickName}");
 
 					id = requestPacket.Id;
 					nickname = requestPacket.NickName;
 
-					LoginResponsePacket responsePacket = new LoginResponsePacket(StatusCode.Success);
+					LoginResponsePacket responsePacket = new LoginResponsePacket(result ? StatusCode.Success : StatusCode.Failed);
 					await clientSocket.SendAsync(responsePacket.Serialize(), SocketFlags.None);
 				}
 				else if (packetType == PacketType.CreateRoomRequest)
@@ -169,6 +169,18 @@ namespace Core
 						}
 					}
 				}
+				else if (packetType == PacketType.Chat)
+				{
+					ChatPacket packet = new ChatPacket(dataBuffer);
+					if (Rooms.TryGetValue(roomName, out var room))
+					{
+						foreach (var user in room.Users)
+						{
+							if (Clients.TryGetValue(user.Key, out var otherClient))
+								await otherClient.SendAsync(packet.Serialize(), SocketFlags.None);
+						}
+					}
+				}
 			}
 		}
 	}

Chat/Core/PacketType.cs

@@ -18,5 +18,6 @@ namespace Core
 		EnterRoomResponse,
 		UserEnter,
 		UserLeave,
+		Chat
 	}
 }