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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2012 Attila Molnar <attilamolnar@hush.com>
*
* This file is part of InspIRCd. InspIRCd is free software: you can
* redistribute it and/or modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* $ModDesc: Implements server-side topic locks and the server-to-server command SVSTOPIC */
#include "inspircd.h"
class CommandSVSTOPIC : public Command
{
public:
CommandSVSTOPIC(Module* Creator)
: Command(Creator, "SVSTOPIC", 1, 4)
{
flags_needed = FLAG_SERVERONLY;
}
CmdResult Handle(const std::vector<std::string> ¶meters, User *user)
{
if (!ServerInstance->ULine(user->server))
{
// Ulines only
return CMD_FAILURE;
}
Channel* chan = ServerInstance->FindChan(parameters[0]);
if (!chan)
return CMD_FAILURE;
if (parameters.size() == 4)
{
// 4 parameter version, set all topic data on the channel to the ones given in the parameters
time_t topicts = ConvToInt(parameters[1]);
if (!topicts)
{
ServerInstance->Logs->Log("m_topiclock", LOG_DEFAULT, "Received SVSTOPIC with a 0 topicts, dropped.");
return CMD_INVALID;
}
std::string newtopic;
newtopic.assign(parameters[3], 0, ServerInstance->Config->Limits.MaxTopic);
bool topics_differ = (chan->topic != newtopic);
if ((topics_differ) || (chan->topicset != topicts) || (chan->setby != parameters[2]))
{
// Update when any parameter differs
chan->topicset = topicts;
chan->setby.assign(parameters[2], 0, 127);
chan->topic = newtopic;
// Send TOPIC to clients only if the actual topic has changed, be silent otherwise
if (topics_differ)
chan->WriteChannel(user, "TOPIC %s :%s", chan->name.c_str(), chan->topic.c_str());
}
}
else
{
// 1 parameter version, nuke the topic
bool topic_empty = chan->topic.empty();
if (!topic_empty || !chan->setby.empty())
{
chan->topicset = 0;
chan->setby.clear();
chan->topic.clear();
if (!topic_empty)
chan->WriteChannel(user, "TOPIC %s :", chan->name.c_str());
}
}
return CMD_SUCCESS;
}
RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
{
return ROUTE_BROADCAST;
}
};
class FlagExtItem : public ExtensionItem
{
public:
FlagExtItem(const std::string& key, Module* owner)
: ExtensionItem(key, owner)
{
}
virtual ~FlagExtItem()
{
}
bool get(const Extensible* container) const
{
return (get_raw(container) != NULL);
}
std::string serialize(SerializeFormat format, const Extensible* container, void* item) const
{
if (format == FORMAT_USER)
return "true";
return "1";
}
void unserialize(SerializeFormat format, Extensible* container, const std::string& value)
{
if (value == "1")
set_raw(container, this);
else
unset_raw(container);
}
void set(Extensible* container, bool value)
{
if (value)
set_raw(container, this);
else
unset_raw(container);
}
void unset(Extensible* container)
{
unset_raw(container);
}
void free(void* item)
{
// nothing to free
}
};
class ModuleTopicLock : public Module
{
CommandSVSTOPIC cmd;
FlagExtItem topiclock;
public:
ModuleTopicLock()
: cmd(this), topiclock("topiclock", this)
{
}
void init()
{
ServerInstance->Modules->AddService(cmd);
ServerInstance->Modules->AddService(topiclock);
ServerInstance->Modules->Attach(I_OnPreTopicChange, this);
}
ModResult OnPreTopicChange(User* user, Channel* chan, const std::string &topic)
{
// Only fired for local users currently, but added a check anyway
if ((IS_LOCAL(user)) && (topiclock.get(chan)))
{
user->WriteNumeric(744, "%s :TOPIC cannot be changed due to topic lock being active on the channel", chan->name.c_str());
return MOD_RES_DENY;
}
return MOD_RES_PASSTHRU;
}
Version GetVersion()
{
return Version("Implements server-side topic locks and the server-to-server command SVSTOPIC", VF_COMMON | VF_VENDOR);
}
};
MODULE_INIT(ModuleTopicLock)
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