Name adjustments and moved some things to the common lib.

SharpChat/ClientCommands/KickBanClientCommand.cs

@@ -0,0 +1,81 @@
+using SharpChat.Misuzu;
+using SharpChat.S2CPackets;
+
+namespace SharpChat.ClientCommands {
+    public class KickBanClientCommand(MisuzuClient msz) : ClientCommand {
+        private readonly MisuzuClient Misuzu = msz ?? throw new ArgumentNullException(nameof(msz));
+
+        public bool IsMatch(ClientCommandContext ctx) {
+            return ctx.NameEquals("kick")
+                || ctx.NameEquals("ban");
+        }
+
+        public void Dispatch(ClientCommandContext ctx) {
+            bool isBanning = ctx.NameEquals("ban");
+            long msgId = ctx.Chat.RandomSnowflake.Next();
+
+            if(!ctx.User.Can(isBanning ? UserPermissions.BanUser : UserPermissions.KickUser)) {
+                ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.COMMAND_NOT_ALLOWED, true, $"/{ctx.Name}"));
+                return;
+            }
+
+            string? banUserTarget = ctx.Args.ElementAtOrDefault(0);
+            string? banDurationStr = ctx.Args.ElementAtOrDefault(1);
+            int banReasonIndex = 1;
+            User? banUser = null;
+
+            if(banUserTarget == null || (banUser = ctx.Chat.Users.FirstOrDefault(u => u.NameEquals(banUserTarget))) == null) {
+                ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.USER_NOT_FOUND, true, banUserTarget ?? "User"));
+                return;
+            }
+
+            if(banUser.Rank >= ctx.User.Rank && banUser != ctx.User) {
+                ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.KICK_NOT_ALLOWED, true, banUser.LegacyName));
+                return;
+            }
+
+            TimeSpan duration = isBanning ? TimeSpan.MaxValue : TimeSpan.Zero;
+            if(!string.IsNullOrWhiteSpace(banDurationStr) && double.TryParse(banDurationStr, out double durationSeconds)) {
+                if(durationSeconds < 0) {
+                    ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.COMMAND_FORMAT_ERROR));
+                    return;
+                }
+
+                duration = TimeSpan.FromSeconds(durationSeconds);
+                ++banReasonIndex;
+            }
+
+            if(duration <= TimeSpan.Zero) {
+                ctx.Chat.BanUser(banUser, duration);
+                return;
+            }
+
+            string banReason = string.Join(' ', ctx.Args.Skip(banReasonIndex));
+
+            Task.Run(async () => {
+                string userId = banUser.UserId.ToString();
+                string userIp = ctx.Chat.GetRemoteAddresses(banUser).FirstOrDefault()?.ToString() ?? string.Empty;
+
+                // obviously it makes no sense to only check for one ip address but that's current misuzu limitations
+                MisuzuBanInfo? fbi = await Misuzu.CheckBanAsync(userId, userIp);
+                if(fbi is null) {
+                    ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.GENERIC_ERROR, true));
+                    return;
+                }
+
+                if(fbi.IsBanned && !fbi.HasExpired) {
+                    ctx.Chat.SendTo(ctx.User, new CommandResponseS2CPacket(msgId, LCR.KICK_NOT_ALLOWED, true, banUser.LegacyName));
+                    return;
+                }
+
+                await Misuzu.CreateBanAsync(
+                    userId, userIp,
+                    ctx.User.UserId.ToString(), ctx.Connection.RemoteAddress.ToString(),
+                    duration, banReason
+                );
+
+                ctx.Chat.BanUser(banUser, duration);
+            }).Wait();
+        }
+    }
+}