Fix compilation of some extras modules

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@11776 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 228 insertions, 0 deletions

diff --git a/src/modules/m_sqlutils.cpp b/src/modules/m_sqlutils.cpp
new file mode 100644
index 000000000..a80e1262b
--- /dev/null
+++ b/src/modules/m_sqlutils.cpp
@@ -0,0 +1,228 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
+ * See: http://wiki.inspircd.org/Credits
+ *
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd.h"
+#include <sstream>
+#include <list>
+#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, User*> IdUserMap;
+typedef std::map<unsigned long, Channel*> IdChanMap;
+typedef std::list<unsigned long> AssocIdList;
+
+class ModuleSQLutils : public Module
+{
+private:
+	IdUserMap iduser;
+	IdChanMap idchan;
+	SimpleExtItem<AssocIdList> idExt;
+
+public:
+	ModuleSQLutils() : idExt("sqlutils_list", this)
+	{
+		ServerInstance->Modules->PublishInterface("SQLutils", this);
+		Implementation eventlist[] = { I_OnChannelDelete, I_OnUnloadModule, I_OnRequest, I_OnUserDisconnect };
+		ServerInstance->Modules->Attach(eventlist, this, 4);
+	}
+
+	~ModuleSQLutils()
+	{
+		ServerInstance->Modules->UnpublishInterface("SQLutils", this);
+	}
+
+
+	const 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;
+	}
+
+	void OnUserDisconnect(User* 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 = idExt.get(user);
+
+		if(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->Logs->Log("m_sqlutils",DEBUG, "BUG: ID associated with user %s doesn't have the same User* associated with it in the map (erasing anyway)", user->nick.c_str());
+					}
+
+					iduser.erase(iter);
+				}
+				else
+				{
+					ServerInstance->Logs->Log("m_sqlutils",DEBUG, "BUG: user %s was extended with sqlutils_queryids but there was nothing matching in the map", user->nick.c_str());
+				}
+			}
+
+			idExt.unset(user);
+		}
+	}
+
+	void AttachList(Extensible* obj, unsigned long id)
+	{
+		AssocIdList* il = idExt.get(obj);
+
+		if (!il)
+		{
+			/* Doesn't already exist, create a new list and attach it. */
+			il = new AssocIdList;
+			idExt.set(obj, 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 = idExt.get(obj);
+
+		if (il)
+		{
+			/* Only do anything if the list exists... (which it ought to) */
+			il->remove(id);
+
+			if(il->empty())
+			{
+				/* If we just emptied it.. */
+				idExt.unset(obj);
+			}
+		}
+	}
+
+	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);
+		}
+	}
+
+	void OnChannelDelete(Channel* 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 = idExt.get(chan);
+
+		if (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->Logs->Log("m_sqlutils",DEBUG, "BUG: ID associated with channel %s doesn't have the same Channel* associated with it in the map (erasing anyway)", chan->name.c_str());
+					}
+					idchan.erase(iter);
+				}
+				else
+				{
+					ServerInstance->Logs->Log("m_sqlutils",DEBUG, "BUG: channel %s was extended with sqlutils_queryids but there was nothing matching in the map", chan->name.c_str());
+				}
+			}
+
+			idExt.unset(chan);
+		}
+	}
+
+	Version GetVersion()
+	{
+		return Version("Provides some utilities to SQL client modules, such as mapping queries to users and channels", VF_VENDOR | VF_SERVICEPROVIDER, API_VERSION);
+	}
+
+};
+
+MODULE_INIT(ModuleSQLutils)