Aselia.UserCommands.NickHandler.Handler C# (CSharp) Метод

        public void Handler(object sender, ReceivedCommandEventArgs e)
        {
            if (e.Arguments.Length < 1)
            {
                e.User.ErrorNeedMoreParams(CMD);
                return;
            }
            string nickname = e.Arguments[0];

            if (e.User.Mask.Nickname != "*")
            {
                e.User.ErrorAlreadyRegistered(CMD);
                return;
            }

            if (!e.User.ValidateNickname(nickname))
            {
                // ValidateNickname will send the numeric.
                return;
            }

            if (e.Server.IsQLined(nickname))
            {
                e.User.SendNumeric(Numerics.ERR_NICKCOLLISION, nickname, ":That nickname is invalid.");
                return;
            }

            string id = nickname.ToLower();
            if (e.Server.UsersById.ContainsKey(id))
            {
                e.User.SendNumeric(Numerics.ERR_NICKNAMEINUSE, nickname, ":That nickname is already in use.");
                return;
            }

            if (e.User.Level != Authorizations.Connecting)
            {
                e.User.BroadcastInclusive("NICK", e.User.Mask.Nickname, nickname);

                e.User.Mask.Nickname = nickname;

                e.Server.UsersById.Remove(e.User.Id);
                e.User.Id = id;
                e.Server.UsersById.Add(e.User.Id, e.User);
            }
            else
            {
                foreach (ChannelBase c in e.User.Channels.Values)
                {
                    if (!e.User.CanSendToChannel(c, true, "change your nickname"))
                    {
                        return;
                    }
                }

                e.User.Mask.Nickname = nickname;
                e.User.Id = id;

                if (e.User.HasSessionFlag("PassedUser") && !e.User.HasSessionFlag("WaitForCap"))
                {
                    e.User.ClearSessionFlag("PassedUser");
                    e.User.OnConnected();
                }
                else
                {
                    e.User.SetSessionFlag("PassedNick");
                }
            }
        }