1 /* +------------------------------------+
\r * | Inspire Internet Relay Chat Daemon |
\r * +------------------------------------+
\r *
\r * InspIRCd: (C) 2002-2007 InspIRCd Development Team
\r * See: http://www.inspircd.org/wiki/index.php/Credits
\r *
\r * This program is free but copyrighted software; see
\r * the file COPYING for details.
\r *
\r * ---------------------------------------------------
\r */
\r\r#include "inspircd.h"
\r#include <sstream>
\r#include <list>
\r#include "users.h"
\r#include "channels.h"
\r#include "modules.h"
\r#include "configreader.h"
\r#include "m_sqlutils.h"
\r\r/* $ModDesc: Provides some utilities to SQL client modules, such as mapping queries to users and channels */
\r/* $ModDep: m_sqlutils.h */
\r\rtypedef std::map<unsigned long, userrec*> IdUserMap;
\rtypedef std::map<unsigned long, chanrec*> IdChanMap;
\rtypedef std::list<unsigned long> AssocIdList;
\r\rclass ModuleSQLutils : public Module
\r{
\rprivate:
\r IdUserMap iduser;
\r IdChanMap idchan;
\r\rpublic:
\r ModuleSQLutils(InspIRCd* Me)
\r : Module::Module(Me)
\r {
\r ServerInstance->PublishInterface("SQLutils", this);
\r }
\r\r virtual ~ModuleSQLutils()
\r {
\r ServerInstance->UnpublishInterface("SQLutils", this);
\r }
\r\r void Implements(char* List)
\r {
\r List[I_OnChannelDelete] = List[I_OnUnloadModule] = List[I_OnRequest] = List[I_OnUserDisconnect] = 1;
\r }
\r\r virtual char* OnRequest(Request* request)
\r {
\r if(strcmp(SQLUTILAU, request->GetId()) == 0)
\r {
\r AssociateUser* req = (AssociateUser*)request;
\r \r iduser.insert(std::make_pair(req->id, req->user));
\r \r AttachList(req->user, req->id);
\r }
\r else if(strcmp(SQLUTILAC, request->GetId()) == 0)
\r {
\r AssociateChan* req = (AssociateChan*)request;
\r \r idchan.insert(std::make_pair(req->id, req->chan));
\r \r AttachList(req->chan, req->id);
\r }
\r else if(strcmp(SQLUTILUA, request->GetId()) == 0)
\r {
\r UnAssociate* req = (UnAssociate*)request;
\r \r /* Unassociate a given query ID with all users and channels
\r * it is associated with.
\r */
\r \r DoUnAssociate(iduser, req->id);
\r DoUnAssociate(idchan, req->id);
\r }
\r else if(strcmp(SQLUTILGU, request->GetId()) == 0)
\r {
\r GetAssocUser* req = (GetAssocUser*)request;
\r \r IdUserMap::iterator iter = iduser.find(req->id);
\r \r if(iter != iduser.end())
\r {
\r req->user = iter->second;
\r }
\r }
\r else if(strcmp(SQLUTILGC, request->GetId()) == 0)
\r {
\r GetAssocChan* req = (GetAssocChan*)request;
\r \r IdChanMap::iterator iter = idchan.find(req->id);
\r \r if(iter != idchan.end())
\r {
\r req->chan = iter->second;
\r }
\r }
\r \r return SQLUTILSUCCESS;
\r }
\r \r virtual void OnUserDisconnect(userrec* user)
\r {
\r /* A user is disconnecting, first we need to check if they have a list of queries associated with them.
\r * Then, if they do, we need to erase each of them from our IdUserMap (iduser) so when the module that
\r * associated them asks to look them up then it gets a NULL result and knows to discard the query.
\r */
\r AssocIdList* il;
\r \r if(user->GetExt("sqlutils_queryids", il))
\r {
\r for(AssocIdList::iterator listiter = il->begin(); listiter != il->end(); listiter++)
\r {
\r IdUserMap::iterator iter;
\r \r iter = iduser.find(*listiter);
\r \r if(iter != iduser.end())
\r {
\r if(iter->second != user)
\r {
\r 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);
\r }
\r\r iduser.erase(iter);
\r }
\r else
\r {
\r ServerInstance->Log(DEBUG, "BUG: user %s was extended with sqlutils_queryids but there was nothing matching in the map", user->nick);
\r }
\r }
\r \r user->Shrink("sqlutils_queryids");
\r delete il;
\r }
\r }
\r \r void AttachList(Extensible* obj, unsigned long id)
\r {
\r AssocIdList* il;
\r \r if(!obj->GetExt("sqlutils_queryids", il))
\r {
\r /* Doesn't already exist, create a new list and attach it. */
\r il = new AssocIdList;
\r obj->Extend("sqlutils_queryids", il);
\r }
\r \r /* Now either way we have a valid list in il, attached. */
\r il->push_back(id);
\r }
\r \r void RemoveFromList(Extensible* obj, unsigned long id)
\r {
\r AssocIdList* il;
\r \r if(obj->GetExt("sqlutils_queryids", il))
\r {
\r /* Only do anything if the list exists... (which it ought to) */
\r il->remove(id);
\r \r if(il->empty())
\r {
\r /* If we just emptied it.. */
\r delete il;
\r obj->Shrink("sqlutils_queryids");
\r }
\r }
\r }
\r \r template <class T> void DoUnAssociate(T &map, unsigned long id)
\r {
\r /* For each occurence of 'id' (well, only one..it's not a multimap) in 'map'
\r * remove it from the map, take an Extensible* value from the map and remove
\r * 'id' from the list of query IDs attached to it.
\r */
\r typename T::iterator iter = map.find(id);
\r \r if(iter != map.end())
\r {
\r /* Found a value indexed by 'id', call RemoveFromList()
\r * on it with 'id' to remove 'id' from the list attached
\r * to the value.
\r */
\r RemoveFromList(iter->second, id);
\r }
\r }
\r \r virtual void OnChannelDelete(chanrec* chan)
\r {
\r /* A channel is being destroyed, first we need to check if it has a list of queries associated with it.
\r * Then, if it does, we need to erase each of them from our IdChanMap (idchan) so when the module that
\r * associated them asks to look them up then it gets a NULL result and knows to discard the query.
\r */
\r AssocIdList* il;
\r \r if(chan->GetExt("sqlutils_queryids", il))
\r {
\r for(AssocIdList::iterator listiter = il->begin(); listiter != il->end(); listiter++)
\r {
\r IdChanMap::iterator iter;
\r \r iter = idchan.find(*listiter);
\r \r if(iter != idchan.end())
\r {
\r if(iter->second != chan)
\r {
\r 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);
\r }
\r idchan.erase(iter);
\r }
\r else
\r {
\r ServerInstance->Log(DEBUG, "BUG: channel %s was extended with sqlutils_queryids but there was nothing matching in the map", chan->name);
\r }
\r }
\r \r chan->Shrink("sqlutils_queryids");
\r delete il;
\r }
\r }
\r \r virtual Version GetVersion()
\r {
\r return Version(1, 1, 0, 0, VF_VENDOR|VF_SERVICEPROVIDER, API_VERSION);
\r }
\r \r};
\r\rMODULE_INIT(ModuleSQLutils);
\r\r
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