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/*
* InspIRCd -- Internet Relay Chat Daemon
*
* Copyright (C) 2017-2019 Sadie Powell <sadie@witchery.services>
* Copyright (C) 2015 Daniel Vassdal <shutter@canternet.org>
* Copyright (C) 2013-2016 Attila Molnar <attilamolnar@hush.com>
* Copyright (C) 2012 Robby <robby@chatbelgie.be>
* Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
* Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
* Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
* Copyright (C) 2006-2007, 2010 Craig Edwards <brain@inspircd.org>
*
* 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/>.
*/
#include "inspircd.h"
/** Handle /LIST.
*/
class CommandList : public Command
{
private:
ChanModeReference secretmode;
ChanModeReference privatemode;
/** Parses the creation time or topic set time out of a LIST parameter.
* @param value The parameter containing a minute count.
* @return The UNIX time at \p value minutes ago.
*/
time_t ParseMinutes(const std::string& value)
{
time_t minutes = ConvToNum<time_t>(value.c_str() + 2);
if (!minutes)
return 0;
return ServerInstance->Time() - (minutes * 60);
}
public:
/** Constructor for list.
*/
CommandList(Module* parent)
: Command(parent,"LIST", 0, 0)
, secretmode(creator, "secret")
, privatemode(creator, "private")
{
allow_empty_last_param = false;
Penalty = 5;
}
/** Handle command.
* @param parameters The parameters to the command
* @param user The user issuing the command
* @return A value from CmdResult to indicate command success or failure.
*/
CmdResult Handle(User* user, const Params& parameters) CXX11_OVERRIDE;
};
/** Handle /LIST
*/
CmdResult CommandList::Handle(User* user, const Params& parameters)
{
// C: Searching based on creation time, via the "C<val" and "C>val" modifiers
// to search for a channel creation time that is lower or higher than val
// respectively.
time_t mincreationtime = 0;
time_t maxcreationtime = 0;
// M: Searching based on mask.
// N: Searching based on !mask.
bool match_name_topic = false;
bool match_inverted = false;
const char* match = NULL;
// T: Searching based on topic time, via the "T<val" and "T>val" modifiers to
// search for a topic time that is lower or higher than val respectively.
time_t mintopictime = 0;
time_t maxtopictime = 0;
// U: Searching based on user count within the channel, via the "<val" and
// ">val" modifiers to search for a channel that has less than or more than
// val users respectively.
size_t minusers = 0;
size_t maxusers = 0;
for (Params::const_iterator iter = parameters.begin(); iter != parameters.end(); ++iter)
{
const std::string& constraint = *iter;
if (constraint[0] == '<')
{
maxusers = ConvToNum<size_t>(constraint.c_str() + 1);
}
else if (constraint[0] == '>')
{
minusers = ConvToNum<size_t>(constraint.c_str() + 1);
}
else if (!constraint.compare(0, 2, "C<", 2) || !constraint.compare(0, 2, "c<", 2))
{
mincreationtime = ParseMinutes(constraint);
}
else if (!constraint.compare(0, 2, "C>", 2) || !constraint.compare(0, 2, "c>", 2))
{
maxcreationtime = ParseMinutes(constraint);
}
else if (!constraint.compare(0, 2, "T<", 2) || !constraint.compare(0, 2, "t<", 2))
{
mintopictime = ParseMinutes(constraint);
}
else if (!constraint.compare(0, 2, "T>", 2) || !constraint.compare(0, 2, "t>", 2))
{
maxtopictime = ParseMinutes(constraint);
}
else
{
// If the glob is prefixed with ! it is inverted.
match = constraint.c_str();
if (match[0] == '!')
{
match_inverted = true;
match += 1;
}
// Ensure that the user didn't just run "LIST !".
if (match[0])
match_name_topic = true;
}
}
const bool has_privs = user->HasPrivPermission("channels/auspex");
user->WriteNumeric(RPL_LISTSTART, "Channel", "Users Name");
const chan_hash& chans = ServerInstance->GetChans();
for (chan_hash::const_iterator i = chans.begin(); i != chans.end(); ++i)
{
Channel* const chan = i->second;
// Check the user count if a search has been specified.
const size_t users = chan->GetUserCounter();
if ((minusers && users <= minusers) || (maxusers && users >= maxusers))
continue;
// Check the creation ts if a search has been specified.
const time_t creationtime = chan->age;
if ((mincreationtime && creationtime <= mincreationtime) || (maxcreationtime && creationtime >= maxcreationtime))
continue;
// Check the topic ts if a search has been specified.
const time_t topictime = chan->topicset;
if ((mintopictime && (!topictime || topictime <= mintopictime)) || (maxtopictime && (!topictime || topictime >= maxtopictime)))
continue;
// Attempt to match a glob pattern.
if (match_name_topic)
{
bool matches = InspIRCd::Match(chan->name, match) || InspIRCd::Match(chan->topic, match);
// The user specified an match that we did not match.
if (!matches && !match_inverted)
continue;
// The user specified an inverted match that we did match.
if (matches && match_inverted)
continue;
}
// if the channel is not private/secret, OR the user is on the channel anyway
bool n = (has_privs || chan->HasUser(user));
// If we're not in the channel and +s is set on it, we want to ignore it
if ((n) || (!chan->IsModeSet(secretmode)))
{
if ((!n) && (chan->IsModeSet(privatemode)))
{
// Channel is private (+p) and user is outside/not privileged
user->WriteNumeric(RPL_LIST, '*', users, "");
}
else
{
/* User is in the channel/privileged, channel is not +s */
user->WriteNumeric(RPL_LIST, chan->name, users, InspIRCd::Format("[+%s] %s", chan->ChanModes(n), chan->topic.c_str()));
}
}
}
user->WriteNumeric(RPL_LISTEND, "End of channel list.");
return CMD_SUCCESS;
}
class CoreModList : public Module
{
private:
CommandList cmd;
public:
CoreModList()
: cmd(this)
{
}
void On005Numeric(std::map<std::string, std::string>& tokens) CXX11_OVERRIDE
{
tokens["ELIST"] = "CMNTU";
tokens["SAFELIST"];
}
Version GetVersion() CXX11_OVERRIDE
{
return Version("Provides the LIST command", VF_VENDOR|VF_CORE);
}
};
MODULE_INIT(CoreModList)
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