sharp-chat/SharpChat/Commands/MessageActionCommand.cs

using SharpChat.Events;
using System;
using System.Linq;

namespace SharpChat.Commands {
    public class MessageActionCommand : IUserCommand {
        public bool IsMatch(UserCommandContext ctx) {
            return ctx.NameEquals("action")
                || ctx.NameEquals("me");
        }

        public void Dispatch(UserCommandContext ctx) {
            if(!ctx.Args.Any())
                return;

            string actionStr = string.Join(' ', ctx.Args);
            if(string.IsNullOrWhiteSpace(actionStr))
                return;

            ctx.Chat.DispatchEvent(new MessageCreateEvent(
                SharpId.Next(),
                ctx.Channel,
                ctx.User,
                DateTimeOffset.Now,
                actionStr,
                false, true, false
            ));
        }
    }
}