Added C2S and S2C markings to class names.

SharpChat/C2SPacketHandlers/PingC2SPacketHandler.cs

@@ -0,0 +1,43 @@
+using SharpChat.Misuzu;
+using SharpChat.S2CPackets;
+
+namespace SharpChat.C2SPacketHandlers {
+    public class PingC2SPacketHandler(MisuzuClient msz) : C2SPacketHandler {
+        private readonly MisuzuClient Misuzu = msz ?? throw new ArgumentNullException(nameof(msz));
+
+        private readonly TimeSpan BumpInterval = TimeSpan.FromMinutes(1);
+        private DateTimeOffset LastBump = DateTimeOffset.MinValue;
+
+        public bool IsMatch(ChatPacketHandlerContext ctx) {
+            return ctx.CheckPacketId("0");
+        }
+
+        public void Handle(ChatPacketHandlerContext ctx) {
+            string[] parts = ctx.SplitText(2);
+
+            if(!int.TryParse(parts.FirstOrDefault(), out int pTime))
+                return;
+
+            ctx.Connection.BumpPing();
+            ctx.Connection.Send(new PongS2CPacket());
+
+            ctx.Chat.ContextAccess.Wait();
+            try {
+                if(LastBump < DateTimeOffset.UtcNow - BumpInterval) {
+                    (string, string)[] bumpList = [.. ctx.Chat.Users
+                        .Where(u => u.Status == ChatUserStatus.Online && ctx.Chat.Connections.Any(c => c.User == u))
+                        .Select(u => (u.UserId.ToString(), ctx.Chat.GetRemoteAddresses(u).FirstOrDefault()?.ToString() ?? string.Empty))];
+
+                    if(bumpList.Length > 0)
+                        Task.Run(async () => {
+                            await Misuzu.BumpUsersOnlineAsync(bumpList);
+                        }).Wait();
+
+                    LastBump = DateTimeOffset.UtcNow;
+                }
+            } finally {
+                ctx.Chat.ContextAccess.Release();
+            }
+        }
+    }
+}