sharp-chat/SharpChat/Commands/AFKCommand.cs

using SharpChat.Packet;
using System.Linq;

namespace SharpChat.Commands {
    public class AFKCommand : IChatCommand {
        private const string DEFAULT = "AFK";
        private const int MAX_LENGTH = 5;

        public bool IsMatch(ChatCommandContext ctx) {
            return ctx.NameEquals("afk");
        }

        public void Dispatch(ChatCommandContext ctx) {
            string statusText = ctx.Args.FirstOrDefault();
            if(string.IsNullOrWhiteSpace(statusText))
                statusText = DEFAULT;
            else {
                statusText = statusText.Trim();
                if(statusText.Length > MAX_LENGTH)
                    statusText = statusText[..MAX_LENGTH].Trim();
            }

            ctx.Chat.UpdateUser(
                ctx.User,
                status: ChatUserStatus.Away,
                statusText: statusText
            );
        }
    }
}