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/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#ifndef INSPIRCD_LISTMODE_PROVIDER
#define INSPIRCD_LISTMODE_PROVIDER
#include <stdio.h>
#include <string>
#include <sstream>
#include <vector>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "wildcard.h"
#include "inspircd.h"
/* Updated to use the <banlist> config tag if it exists
* Written by Om <omster@gmail.com>, December 2005.
* Based on code previously written by Om - April 2005
* Updated to new API July 8th 2006 by Brain
* Originally based on m_chanprotect and m_silence
*/
/** Get the time as a string
*/
inline std::string stringtime()
{
std::ostringstream TIME;
TIME << time(NULL);
return TIME.str();
}
/** An item in a listmode's list
*/
class ListItem : public classbase
{
public:
std::string nick;
irc::string mask;
std::string time;
};
/** The number of items a listmode's list may contain
*/
class ListLimit : public classbase
{
public:
std::string mask;
unsigned int limit;
};
/** Items stored in the channel's list
*/
typedef std::vector<ListItem> modelist;
/** Max items per channel by name
*/
typedef std::vector<ListLimit> limitlist;
/** A request used to check if a user is on a channel's list or not
*/
class ListModeRequest : public Request
{
public:
userrec* user;
chanrec* chan;
/** Check if a user is on a channel's list.
* The Event::Send() event returns true if the user is on the channel's list.
* @param sender Sending module
* @param target Target module
* @param u User to check against
* @param c Channel to check against
*/
ListModeRequest(Module* sender, Module* target, userrec* u, chanrec* c) : Request(sender, target, "LM_CHECKLIST"), user(u), chan(c)
{
}
/** Destructor
*/
~ListModeRequest()
{
}
};
/** The base class for list modes, should be inherited.
*/
class ListModeBase : public ModeHandler
{
protected:
/** Storage key
*/
std::string infokey;
/** Numeric to use when outputting the list
*/
std::string listnumeric;
/** Numeric to indicate end of list
*/
std::string endoflistnumeric;
/** String to send for end of list
*/
std::string endofliststring;
/** Automatically tidy up entries
*/
bool tidy;
/** Config tag to check for max items per channel
*/
std::string configtag;
/** Limits on a per-channel basis read from the tag
* specified in ListModeBase::configtag
*/
limitlist chanlimits;
public:
/** Constructor.
* @param Instance The creator of this class
* @param modechar Mode character
* @param eolstr End of list string
* @pram lnum List numeric
* @param eolnum End of list numeric
* @param autotidy Automatically tidy list entries on add
* @param ctag Configuration tag to get limits from
*/
ListModeBase(InspIRCd* Instance, char modechar, const std::string &eolstr, const std::string &lnum, const std::string &eolnum, bool autotidy, const std::string &ctag = "banlist")
: ModeHandler(Instance, modechar, 1, 1, true, MODETYPE_CHANNEL, false), listnumeric(lnum), endoflistnumeric(eolnum), endofliststring(eolstr), tidy(autotidy), configtag(ctag)
{
this->DoRehash();
infokey = "listbase_mode_" + std::string(1, mode) + "_list";
}
/** See mode.h
*/
std::pair<bool,std::string> ModeSet(userrec* source, userrec* dest, chanrec* channel, const std::string ¶meter)
{
modelist* el;
channel->GetExt(infokey, el);
if (el)
{
for (modelist::iterator it = el->begin(); it != el->end(); it++)
{
if(parameter == it->mask)
{
return std::make_pair(true, parameter);
}
}
}
return std::make_pair(false, parameter);
}
/** Display the list for this mode
* @param user The user to send the list to
* @param channel The channel the user is requesting the list for
*/
virtual void DisplayList(userrec* user, chanrec* channel)
{
modelist* el;
channel->GetExt(infokey, el);
if (el)
{
for (modelist::reverse_iterator it = el->rbegin(); it != el->rend(); ++it)
{
user->WriteServ("%s %s %s %s %s %s", listnumeric.c_str(), user->nick, channel->name, it->mask.c_str(), it->nick.c_str(), it->time.c_str());
}
}
user->WriteServ("%s %s %s :%s", endoflistnumeric.c_str(), user->nick, channel->name, endofliststring.c_str());
}
/** Remove all instances of the mode from a channel.
* See mode.h
* @param channel The channel to remove all instances of the mode from
*/
virtual void RemoveMode(chanrec* channel)
{
modelist* el;
channel->GetExt(infokey, el);
if (el)
{
irc::modestacker modestack(false);
std::deque<std::string> stackresult;
const char* mode_junk[MAXMODES+2];
mode_junk[0] = channel->name;
userrec* n = new userrec(ServerInstance);
n->SetFd(FD_MAGIC_NUMBER);
for (modelist::iterator it = el->begin(); it != el->end(); it++)
{
modestack.Push(this->GetModeChar(), assign(it->mask));
}
while (modestack.GetStackedLine(stackresult))
{
for (size_t j = 0; j < stackresult.size(); j++)
{
mode_junk[j+1] = stackresult[j].c_str();
}
ServerInstance->SendMode(mode_junk, stackresult.size() + 1, n);
}
delete n;
}
}
/** See mode.h
*/
virtual void RemoveMode(userrec* user)
{
/* Listmodes dont get set on users */
}
/** Perform a rehash of this mode's configuration data
*/
virtual void DoRehash()
{
ConfigReader Conf(ServerInstance);
chanlimits.clear();
for (int i = 0; i < Conf.Enumerate(configtag); i++)
{
// For each <banlist> tag
ListLimit limit;
limit.mask = Conf.ReadValue(configtag, "chan", i);
limit.limit = Conf.ReadInteger(configtag, "limit", i, true);
if (limit.mask.size() && limit.limit > 0)
chanlimits.push_back(limit);
}
if (chanlimits.size() == 0)
{
ListLimit limit;
limit.mask = "*";
limit.limit = 64;
chanlimits.push_back(limit);
}
}
/** Populate the Implements list with the correct events for a List Mode
*/
virtual void DoImplements(char* List)
{
List[I_OnChannelDelete] = List[I_OnSyncChannel] = List[I_OnCleanup] = List[I_OnRehash] = 1;
}
/** Handle the list mode.
* See mode.h
*/
virtual ModeAction OnModeChange(userrec* source, userrec* dest, chanrec* channel, std::string ¶meter, bool adding)
{
// Try and grab the list
modelist* el;
channel->GetExt(infokey, el);
if (adding)
{
// If there was no list
if (!el)
{
// Make one
el = new modelist;
channel->Extend(infokey, el);
}
// Clean the mask up
if (this->tidy)
ModeParser::CleanMask(parameter);
// Check if the item already exists in the list
for (modelist::iterator it = el->begin(); it != el->end(); it++)
{
if (parameter == it->mask)
{
/* Give a subclass a chance to error about this */
TellAlreadyOnList(source, channel, parameter);
// it does, deny the change
return MODEACTION_DENY;
}
}
unsigned int maxsize = 0;
for (limitlist::iterator it = chanlimits.begin(); it != chanlimits.end(); it++)
{
if (match(channel->name, it->mask.c_str()))
{
// We have a pattern matching the channel...
maxsize = el->size();
if (maxsize < it->limit)
{
/* Ok, it *could* be allowed, now give someone subclassing us
* a chance to validate the parameter.
* The param is passed by reference, so they can both modify it
* and tell us if we allow it or not.
*
* eg, the subclass could:
* 1) allow
* 2) 'fix' parameter and then allow
* 3) deny
*/
if (ValidateParam(source, channel, parameter))
{
// And now add the mask onto the list...
ListItem e;
e.mask = assign(parameter);
e.nick = source->nick;
e.time = stringtime();
el->push_back(e);
return MODEACTION_ALLOW;
}
else
{
/* If they deny it they have the job of giving an error message */
return MODEACTION_DENY;
}
}
}
}
/* List is full, give subclass a chance to send a custom message */
if (!TellListTooLong(source, channel, parameter))
{
source->WriteServ("478 %s %s %s :Channel ban/ignore list is full", source->nick, channel->name, parameter.c_str());
}
parameter = "";
return MODEACTION_DENY;
}
else
{
// We're taking the mode off
if (el)
{
for (modelist::iterator it = el->begin(); it != el->end(); it++)
{
if (parameter == it->mask)
{
el->erase(it);
if (el->size() == 0)
{
channel->Shrink(infokey);
delete el;
}
return MODEACTION_ALLOW;
}
}
/* Tried to remove something that wasn't set */
TellNotSet(source, channel, parameter);
parameter = "";
return MODEACTION_DENY;
}
else
{
/* Hmm, taking an exception off a non-existant list, DIE */
TellNotSet(source, channel, parameter);
parameter = "";
return MODEACTION_DENY;
}
}
return MODEACTION_DENY;
}
/** Get Extensible key for this mode
*/
virtual std::string& GetInfoKey()
{
return infokey;
}
/** Handle channel deletion.
* See modules.h.
* @param chan Channel being deleted
*/
virtual void DoChannelDelete(chanrec* chan)
{
modelist* list;
chan->GetExt(infokey, list);
if (list)
{
chan->Shrink(infokey);
delete list;
}
}
/** Syncronize channel item list with another server.
* See modules.h
* @param chan Channel to syncronize
* @param proto Protocol module pointer
* @param opaque Opaque connection handle
*/
virtual void DoSyncChannel(chanrec* chan, Module* proto, void* opaque)
{
modelist* list;
chan->GetExt(infokey, list);
irc::modestacker modestack(true);
std::deque<std::string> stackresult;
if (list)
{
for (modelist::iterator it = list->begin(); it != list->end(); it++)
{
modestack.Push(std::string(1, mode)[0], assign(it->mask));
}
}
while (modestack.GetStackedLine(stackresult))
{
irc::stringjoiner mode_join(" ", stackresult, 0, stackresult.size() - 1);
std::string line = mode_join.GetJoined();
proto->ProtoSendMode(opaque, TYPE_CHANNEL, chan, line);
}
}
/** Clean up module on unload
* @param target_type Type of target to clean
* @param item Item to clean
*/
virtual void DoCleanup(int target_type, void* item)
{
}
/** Validate parameters.
* Overridden by implementing module.
* @param source Source user adding the parameter
* @param channel Channel the parameter is being added to
* @param parameter The actual parameter being added
* @return true if the parameter is valid
*/
virtual bool ValidateParam(userrec* source, chanrec* channel, std::string ¶meter)
{
return true;
}
/** Tell the user the list is too long.
* Overridden by implementing module.
* @param source Source user adding the parameter
* @param channel Channel the parameter is being added to
* @param parameter The actual parameter being added
* @return Ignored
*/
virtual bool TellListTooLong(userrec* source, chanrec* channel, std::string ¶meter)
{
return false;
}
/** Tell the user an item is already on the list.
* Overridden by implementing module.
* @param source Source user adding the parameter
* @param channel Channel the parameter is being added to
* @param parameter The actual parameter being added
*/
virtual void TellAlreadyOnList(userrec* source, chanrec* channel, std::string ¶meter)
{
}
/** Tell the user that the parameter is not in the list.
* Overridden by implementing module.
* @param source Source user removing the parameter
* @param channel Channel the parameter is being removed from
* @param parameter The actual parameter being removed
*/
virtual void TellNotSet(userrec* source, chanrec* channel, std::string ¶meter)
{
}
};
#endif
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