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

        public void Handler(object sender, ReceivedCommandEventArgs e)
        {
            if (e.Arguments.Length < 1)
            {
                e.User.ErrorNeedMoreParams(CMD);
                return;
            }

            if (!e.Server.IsValidChannel(e.Arguments[0]))
            {
                e.User.SendNumeric(Numerics.ERR_BADCHANMASK, e.Arguments[0], ":That is an invalid channel mask.");
                return;
            }

            ChannelBase channel = e.Server.GetChannel(e.Arguments[0]);
            if (channel == null || (channel.HasFlag("Secret") && !e.User.IsVoice(channel) && e.User.GetChannel(channel.Name) == null))
            {
                e.User.SendNumeric(Numerics.ERR_NOSUCHCHANNEL, e.Arguments[0], ":That channel does not exist.");
                return;
            }

            if (e.Arguments.Length > 1)
            {
                if (!e.User.IsOperator(channel))
                {
                    if (channel.HasFlag("TopicLock"))
                    {
                        e.User.SendNumeric(Numerics.ERR_CHANOPPRIVSNEEDED, channel.Name, ":You must be an operator or higher to change the topic.");
                        return;
                    }
                    else if (!e.User.CanSendToChannel(channel, false, "change the topic"))
                    {
                        return;
                    }
                }

                string topic = e.Arguments[1];
                if (string.IsNullOrWhiteSpace(topic) || topic == "-")
                {
                    topic = string.Empty;
                    if (channel.Properties.ContainsKey("Topic"))
                    {
                        channel.Properties.Remove("Topic");
                        channel.Commit();
                    }
                    else
                    {
                        return;
                    }
                }
                else
                {
                    int max = e.Server.Settings.MaximumTopicLength;
                    if (topic.Length > max)
                    {
                        topic = topic.Remove(max);
                    }

                    channel.Properties["Topic"] = topic;
                    channel.Commit();
                }

                channel.BroadcastInclusive(CMD, e.User, channel.Name, topic);
            }
            else
            {
                if (channel.Properties.ContainsKey("Topic"))
                {
                    e.User.SendNumeric(Numerics.RPL_TOPIC, channel.Name, ":" + (string)channel.Properties["Topic"]);
                }
                else
                {
                    e.User.SendNumeric(Numerics.RPL_NOTOPIC, channel.Name, ":No topic set.");
                }
            }
        }