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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.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include <sstream>
#include <list>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "configreader.h"
#include "m_sqlutils.h"
/* $ModDesc: Provides some utilities to SQL client modules, such as mapping queries to users and channels */
/* $ModDep: m_sqlutils.h */
typedef std::map<unsigned long, userrec*> IdUserMap;
typedef std::map<unsigned long, chanrec*> IdChanMap;
typedef std::list<unsigned long> AssocIdList;
class ModuleSQLutils : public Module
{
private:
IdUserMap iduser;
IdChanMap idchan;
public:
ModuleSQLutils(InspIRCd* Me)
: Module::Module(Me)
{
ServerInstance->PublishInterface("SQLutils", this);
}
virtual ~ModuleSQLutils()
{
ServerInstance->UnpublishInterface("SQLutils", this);
}
void Implements(char* List)
{
List[I_OnChannelDelete] = List[I_OnUnloadModule] = List[I_OnRequest] = List[I_OnUserDisconnect] = 1;
}
virtual char* OnRequest(Request* request)
{
if(strcmp(SQLUTILAU, request->GetId()) == 0)
{
AssociateUser* req = (AssociateUser*)request;
iduser.insert(std::make_pair(req->id, req->user));
AttachList(req->user, req->id);
}
else if(strcmp(SQLUTILAC, request->GetId()) == 0)
{
AssociateChan* req = (AssociateChan*)request;
idchan.insert(std::make_pair(req->id, req->chan));
AttachList(req->chan, req->id);
}
else if(strcmp(SQLUTILUA, request->GetId()) == 0)
{
UnAssociate* req = (UnAssociate*)request;
/* Unassociate a given query ID with all users and channels
* it is associated with.
*/
DoUnAssociate(iduser, req->id);
DoUnAssociate(idchan, req->id);
}
else if(strcmp(SQLUTILGU, request->GetId()) == 0)
{
GetAssocUser* req = (GetAssocUser*)request;
IdUserMap::iterator iter = iduser.find(req->id);
if(iter != iduser.end())
{
req->user = iter->second;
}
}
else if(strcmp(SQLUTILGC, request->GetId()) == 0)
{
GetAssocChan* req = (GetAssocChan*)request;
IdChanMap::iterator iter = idchan.find(req->id);
if(iter != idchan.end())
{
req->chan = iter->second;
}
}
return SQLUTILSUCCESS;
}
virtual void OnUserDisconnect(userrec* user)
{
/* A user is disconnecting, first we need to check if they have a list of queries associated with them.
* Then, if they do, we need to erase each of them from our IdUserMap (iduser) so when the module that
* associated them asks to look them up then it gets a NULL result and knows to discard the query.
*/
AssocIdList* il;
if(user->GetExt("sqlutils_queryids", il))
{
for(AssocIdList::iterator listiter = il->begin(); listiter != il->end(); listiter++)
{
IdUserMap::iterator iter;
iter = iduser.find(*listiter);
if(iter != iduser.end())
{
if(iter->second != user)
{
ServerInstance->Log(DEBUG, "BUG: ID associated with user %s doesn't have the same userrec* associated with it in the map (erasing anyway)", user->nick);
}
iduser.erase(iter);
}
else
{
ServerInstance->Log(DEBUG, "BUG: user %s was extended with sqlutils_queryids but there was nothing matching in the map", user->nick);
}
}
user->Shrink("sqlutils_queryids");
delete il;
}
}
void AttachList(Extensible* obj, unsigned long id)
{
AssocIdList* il;
if(!obj->GetExt("sqlutils_queryids", il))
{
/* Doesn't already exist, create a new list and attach it. */
il = new AssocIdList;
obj->Extend("sqlutils_queryids", il);
}
/* Now either way we have a valid list in il, attached. */
il->push_back(id);
}
void RemoveFromList(Extensible* obj, unsigned long id)
{
AssocIdList* il;
if(obj->GetExt("sqlutils_queryids", il))
{
/* Only do anything if the list exists... (which it ought to) */
il->remove(id);
if(il->empty())
{
/* If we just emptied it.. */
delete il;
obj->Shrink("sqlutils_queryids");
}
}
}
template <class T> void DoUnAssociate(T &map, unsigned long id)
{
/* For each occurence of 'id' (well, only one..it's not a multimap) in 'map'
* remove it from the map, take an Extensible* value from the map and remove
* 'id' from the list of query IDs attached to it.
*/
typename T::iterator iter = map.find(id);
if(iter != map.end())
{
/* Found a value indexed by 'id', call RemoveFromList()
* on it with 'id' to remove 'id' from the list attached
* to the value.
*/
RemoveFromList(iter->second, id);
}
}
virtual void OnChannelDelete(chanrec* chan)
{
/* A channel is being destroyed, first we need to check if it has a list of queries associated with it.
* Then, if it does, we need to erase each of them from our IdChanMap (idchan) so when the module that
* associated them asks to look them up then it gets a NULL result and knows to discard the query.
*/
AssocIdList* il;
if(chan->GetExt("sqlutils_queryids", il))
{
for(AssocIdList::iterator listiter = il->begin(); listiter != il->end(); listiter++)
{
IdChanMap::iterator iter;
iter = idchan.find(*listiter);
if(iter != idchan.end())
{
if(iter->second != chan)
{
ServerInstance->Log(DEBUG, "BUG: ID associated with channel %s doesn't have the same chanrec* associated with it in the map (erasing anyway)", chan->name);
}
idchan.erase(iter);
}
else
{
ServerInstance->Log(DEBUG, "BUG: channel %s was extended with sqlutils_queryids but there was nothing matching in the map", chan->name);
}
}
chan->Shrink("sqlutils_queryids");
delete il;
}
}
virtual Version GetVersion()
{
return Version(1, 1, 0, 0, VF_VENDOR|VF_SERVICEPROVIDER, API_VERSION);
}
};
MODULE_INIT(ModuleSQLutils);
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