user enter, leave

Chat/Client/ChatRoomForm.Designer.cs

@@ -84,6 +84,7 @@
 			this.Name = "ChatRoomForm";
 			this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
 			this.Text = "CharRoomForm";
+			this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.ChatRoomForm_FormClosing);
 			this.ResumeLayout(false);
 			this.PerformLayout();
 

Chat/Client/ChatRoomForm.cs

@@ -1,9 +1,11 @@
-using System;
+using Core;
+using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
+using System.Net.Sockets;
 using System.Text;
 using System.Threading.Tasks;
 using System.Windows.Forms;
@@ -15,6 +17,14 @@ namespace Client
 		public ChatRoomForm()
 		{
 			InitializeComponent();
+			InitInstance();
+		}
+
+		private void InitInstance()
+		{
+			lbxUser.Items.Add(Singleton.Instance.Nickname);
+			Singleton.Instance.UserEnterResponsed += UserEnterResponsed;
+			Singleton.Instance.UserLeaveResponsed += UserLeaveResponsed;
 		}
 
 		private void btmSend_Click(object sender, EventArgs e)
@@ -33,5 +43,53 @@ namespace Client
 			lbxMsg.SelectedIndex = lbxMsg.Items.Count - 1;
 			lbxMsg.SelectedIndex = -1;
 		}
+
+		private void InvokeMethod(InvokedMethod method)
+		{
+			if (this.InvokeRequired)
+			{
+				this.Invoke(new MethodInvoker(() =>
+				{
+					method();
+				}));
+			}
+			else
+			{
+				method();
+			}
+		}
+
+		private void UserEnterResponsed(object? sender, EventArgs e)
+		{
+			if (sender == null)
+				return;
+
+			UserEnterPacket packet = (UserEnterPacket)sender;
+			InvokeMethod(() =>
+			{
+				lbxUser.Items.Add(packet.Nickname);
+			});
+		}
+
+		private void UserLeaveResponsed(object? sender, EventArgs e)
+		{
+			if (sender == null)
+				return;
+
+			UserLeavePacket packet = (UserLeavePacket)sender;
+			InvokeMethod(() =>
+			{
+				lbxUser.Items.Remove(packet.Nickname);
+			});
+		}
+
+		private async void ChatRoomForm_FormClosing(object sender, FormClosingEventArgs e)
+		{
+			Singleton.Instance.UserEnterResponsed -= UserEnterResponsed;
+			Singleton.Instance.UserLeaveResponsed -= UserLeaveResponsed;
+			
+			UserLeavePacket packet = new UserLeavePacket(Singleton.Instance.Nickname);
+			await Singleton.Instance.SendAsync(packet.Serialize(), SocketFlags.None);
+		}
 	}
 }

Chat/Client/RoomListForm.cs

@@ -12,10 +12,10 @@ using System.Windows.Forms;
 
 namespace Client
 {
+	delegate void InvokedMethod();
+
 	public partial class RoomListForm : Form
 	{
-		private delegate void InvokedMethod();
-
 		public RoomListForm()
 		{
 			InitializeComponent();
@@ -61,9 +61,9 @@ namespace Client
 
 		private void InvokeMethod(InvokedMethod method)
 		{
-			if (InvokeRequired)
+			if (this.InvokeRequired)
 			{
-				lbxRoom.Invoke(new MethodInvoker(() =>
+				this.Invoke(new MethodInvoker(() =>
 				{
 					method();
 				}));

Chat/Client/Singleton.cs

@@ -21,6 +21,8 @@ namespace Client
 		public event EventHandler? CreateRoomResponsed;
 		public event EventHandler? RoomListResponsed;
 		public event EventHandler? EnterRoomResponsed;
+		public event EventHandler? UserEnterResponsed;
+		public event EventHandler? UserLeaveResponsed;
 
 		public async Task ConnectAsync(string ip, int port)
 		{
@@ -88,6 +90,16 @@ namespace Client
 					EnterRoomResponsePacket packet = new EnterRoomResponsePacket(dataBuffer);
 					EnterRoomResponsed?.Invoke(packet, EventArgs.Empty);
 				}
+				else if (packetType == PacketType.UserEnter)
+				{
+					UserEnterPacket packet = new UserEnterPacket(dataBuffer);
+					UserEnterResponsed?.Invoke(packet, EventArgs.Empty);
+				}
+				else if (packetType == PacketType.UserLeave)
+				{
+					UserLeavePacket packet = new UserLeavePacket(dataBuffer);
+					UserLeaveResponsed?.Invoke(packet, EventArgs.Empty);
+				}
 			}
 		}
 	}