Attempt to revert r11734

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@11735 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 344 insertions, 0 deletions

diff --git a/src/commands/cmd_whowas.cpp b/src/commands/cmd_whowas.cpp
new file mode 100644
index 000000000..78a7e7544
--- /dev/null
+++ b/src/commands/cmd_whowas.cpp
@@ -0,0 +1,344 @@
+/*       +------------------------------------+
+ *       | 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 "commands/cmd_whowas.h"
+
+WhoWasMaintainTimer * timer;
+
+CommandWhowas::CommandWhowas( Module* parent) : Command(parent, "WHOWAS", 1)
+{
+	syntax = "<nick>{,<nick>}";
+	Penalty = 2;
+	timer = new WhoWasMaintainTimer(ServerInstance, 3600);
+	ServerInstance->Timers->AddTimer(timer);
+}
+
+CmdResult CommandWhowas::Handle (const std::vector<std::string>& parameters, User* user)
+{
+	/* if whowas disabled in config */
+	if (ServerInstance->Config->WhoWasGroupSize == 0 || ServerInstance->Config->WhoWasMaxGroups == 0)
+	{
+		user->WriteNumeric(421, "%s %s :This command has been disabled.",user->nick.c_str(),command.c_str());
+		return CMD_FAILURE;
+	}
+
+	whowas_users::iterator i = whowas.find(assign(parameters[0]));
+
+	if (i == whowas.end())
+	{
+		user->WriteNumeric(406, "%s %s :There was no such nickname",user->nick.c_str(),parameters[0].c_str());
+		user->WriteNumeric(369, "%s %s :End of WHOWAS",user->nick.c_str(),parameters[0].c_str());
+		return CMD_FAILURE;
+	}
+	else
+	{
+		whowas_set* grp = i->second;
+		if (grp->size())
+		{
+			for (whowas_set::iterator ux = grp->begin(); ux != grp->end(); ux++)
+			{
+				WhoWasGroup* u = *ux;
+				time_t rawtime = u->signon;
+				tm *timeinfo;
+				char b[25];
+
+				timeinfo = localtime(&rawtime);
+
+				strncpy(b,asctime(timeinfo),24);
+				b[24] = 0;
+
+				user->WriteNumeric(314, "%s %s %s %s * :%s",user->nick.c_str(),parameters[0].c_str(),
+					u->ident.c_str(),u->dhost.c_str(),u->gecos.c_str());
+
+				if (user->HasPrivPermission("users/auspex"))
+					user->WriteNumeric(379, "%s %s :was connecting from *@%s",
+						user->nick.c_str(), parameters[0].c_str(), u->host.c_str());
+
+				if (*ServerInstance->Config->HideWhoisServer && !user->HasPrivPermission("servers/auspex"))
+					user->WriteNumeric(312, "%s %s %s :%s",user->nick.c_str(),parameters[0].c_str(), ServerInstance->Config->HideWhoisServer, b);
+				else
+					user->WriteNumeric(312, "%s %s %s :%s",user->nick.c_str(),parameters[0].c_str(), u->server, b);
+			}
+		}
+		else
+		{
+			user->WriteNumeric(406, "%s %s :There was no such nickname",user->nick.c_str(),parameters[0].c_str());
+			user->WriteNumeric(369, "%s %s :End of WHOWAS",user->nick.c_str(),parameters[0].c_str());
+			return CMD_FAILURE;
+		}
+	}
+
+	user->WriteNumeric(369, "%s %s :End of WHOWAS",user->nick.c_str(),parameters[0].c_str());
+	return CMD_SUCCESS;
+}
+
+std::string CommandWhowas::GetStats()
+{
+	int whowas_size = 0;
+	int whowas_bytes = 0;
+	whowas_users_fifo::iterator iter;
+	for (iter = whowas_fifo.begin(); iter != whowas_fifo.end(); iter++)
+	{
+		whowas_set* n = (whowas_set*)whowas.find(iter->second)->second;
+		if (n->size())
+		{
+			whowas_size += n->size();
+			whowas_bytes += (sizeof(whowas_set) + ( sizeof(WhoWasGroup) * n->size() ) );
+		}
+	}
+	stats.assign("Whowas(MAPSETS) " +ConvToStr(whowas_size)+" ("+ConvToStr(whowas_bytes)+" bytes)");
+	return stats;
+}
+
+void CommandWhowas::AddToWhoWas(User* user)
+{
+	/* if whowas disabled */
+	if (ServerInstance->Config->WhoWasGroupSize == 0 || ServerInstance->Config->WhoWasMaxGroups == 0)
+	{
+		return;
+	}
+
+	whowas_users::iterator iter = whowas.find(irc::string(user->nick.c_str()));
+
+	if (iter == whowas.end())
+	{
+		whowas_set* n = new whowas_set;
+		WhoWasGroup *a = new WhoWasGroup(user);
+		n->push_back(a);
+		whowas[user->nick.c_str()] = n;
+		whowas_fifo.push_back(std::make_pair(ServerInstance->Time(),user->nick.c_str()));
+
+		if ((int)(whowas.size()) > ServerInstance->Config->WhoWasMaxGroups)
+		{
+			whowas_users::iterator iter2 = whowas.find(whowas_fifo[0].second);
+			if (iter2 != whowas.end())
+			{
+				whowas_set* n2 = (whowas_set*)iter2->second;
+
+				if (n2->size())
+				{
+					while (n2->begin() != n2->end())
+					{
+						WhoWasGroup *a2 = *(n2->begin());
+						delete a2;
+						n2->pop_front();
+					}
+				}
+
+				delete n2;
+				whowas.erase(iter2);
+			}
+			whowas_fifo.pop_front();
+		}
+	}
+	else
+	{
+		whowas_set* group = (whowas_set*)iter->second;
+		WhoWasGroup *a = new WhoWasGroup(user);
+		group->push_back(a);
+
+		if ((int)(group->size()) > ServerInstance->Config->WhoWasGroupSize)
+		{
+			WhoWasGroup *a2 = (WhoWasGroup*)*(group->begin());
+			delete a2;
+			group->pop_front();
+		}
+	}
+}
+
+/* on rehash, refactor maps according to new conf values */
+void CommandWhowas::PruneWhoWas(time_t t)
+{
+	/* config values */
+	int groupsize = ServerInstance->Config->WhoWasGroupSize;
+	int maxgroups = ServerInstance->Config->WhoWasMaxGroups;
+	int maxkeep =   ServerInstance->Config->WhoWasMaxKeep;
+
+	/* first cut the list to new size (maxgroups) and also prune entries that are timed out. */
+	whowas_users::iterator iter;
+	int fifosize;
+	while ((fifosize = (int)whowas_fifo.size()) > 0)
+	{
+		if (fifosize > maxgroups || whowas_fifo[0].first < t - maxkeep)
+		{
+			iter = whowas.find(whowas_fifo[0].second);
+
+			/* hopefully redundant integrity check, but added while debugging r6216 */
+			if (iter == whowas.end())
+			{
+				/* this should never happen, if it does maps are corrupt */
+				ServerInstance->Logs->Log("WHOWAS",DEFAULT, "BUG: Whowas maps got corrupted! (1)");
+				return;
+			}
+
+			whowas_set* n = (whowas_set*)iter->second;
+
+			if (n->size())
+			{
+				while (n->begin() != n->end())
+				{
+					WhoWasGroup *a = *(n->begin());
+					delete a;
+					n->pop_front();
+				}
+			}
+
+			delete n;
+			whowas.erase(iter);
+			whowas_fifo.pop_front();
+		}
+		else
+			break;
+	}
+
+	/* Then cut the whowas sets to new size (groupsize) */
+	fifosize = (int)whowas_fifo.size();
+	for (int i = 0; i < fifosize; i++)
+	{
+		iter = whowas.find(whowas_fifo[0].second);
+		/* hopefully redundant integrity check, but added while debugging r6216 */
+		if (iter == whowas.end())
+		{
+			/* this should never happen, if it does maps are corrupt */
+			ServerInstance->Logs->Log("WHOWAS",DEFAULT, "BUG: Whowas maps got corrupted! (2)");
+			return;
+		}
+		whowas_set* n = (whowas_set*)iter->second;
+		if (n->size())
+		{
+			int nickcount = n->size();
+			while (n->begin() != n->end() && nickcount > groupsize)
+			{
+				WhoWasGroup *a = *(n->begin());
+				delete a;
+				n->pop_front();
+				nickcount--;
+			}
+		}
+	}
+}
+
+/* call maintain once an hour to remove expired nicks */
+void CommandWhowas::MaintainWhoWas(time_t t)
+{
+	for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
+	{
+		whowas_set* n = (whowas_set*)iter->second;
+		if (n->size())
+		{
+			while ((n->begin() != n->end()) && ((*n->begin())->signon < t - ServerInstance->Config->WhoWasMaxKeep))
+			{
+				WhoWasGroup *a = *(n->begin());
+				delete a;
+				n->erase(n->begin());
+			}
+		}
+	}
+}
+
+CommandWhowas::~CommandWhowas()
+{
+	if (timer)
+	{
+		ServerInstance->Timers->DelTimer(timer);
+	}
+
+	whowas_users::iterator iter;
+	int fifosize;
+	while ((fifosize = (int)whowas_fifo.size()) > 0)
+	{
+		iter = whowas.find(whowas_fifo[0].second);
+
+		/* hopefully redundant integrity check, but added while debugging r6216 */
+		if (iter == whowas.end())
+		{
+			/* this should never happen, if it does maps are corrupt */
+			ServerInstance->Logs->Log("WHOWAS",DEFAULT, "BUG: Whowas maps got corrupted! (3)");
+			return;
+		}
+
+		whowas_set* n = (whowas_set*)iter->second;
+
+		if (n->size())
+		{
+			while (n->begin() != n->end())
+			{
+				WhoWasGroup *a = *(n->begin());
+				delete a;
+				n->pop_front();
+			}
+		}
+
+		delete n;
+		whowas.erase(iter);
+		whowas_fifo.pop_front();
+	}
+}
+
+WhoWasGroup::WhoWasGroup(User* user) : host(user->host), dhost(user->dhost), ident(user->ident),
+	server(user->server), gecos(user->fullname), signon(user->signon)
+{
+}
+
+WhoWasGroup::~WhoWasGroup()
+{
+}
+
+/* every hour, run this function which removes all entries older than Config->WhoWasMaxKeep */
+void WhoWasMaintainTimer::Tick(time_t)
+{
+	Module* whowas = ServerInstance->Modules->Find("cmd_whowas.so");
+	if (whowas)
+	{
+		WhowasRequest(whowas, whowas, WhowasRequest::WHOWAS_MAINTAIN).Send();
+	}
+}
+
+class ModuleWhoWas : public Module
+{
+	CommandWhowas cmd;
+ public:
+	ModuleWhoWas(InspIRCd *Me) : Module(Me), cmd(this)
+	{
+		ServerInstance->AddCommand(&cmd);
+	}
+
+	const char* OnRequest(Request* request)
+	{
+		WhowasRequest* req = static_cast<WhowasRequest*>(request);
+		switch (req->type)
+		{
+			case WhowasRequest::WHOWAS_ADD:
+				cmd.AddToWhoWas(req->user);
+				break;
+			case WhowasRequest::WHOWAS_STATS:
+				req->value = cmd.GetStats();
+				break;
+			case WhowasRequest::WHOWAS_PRUNE:
+				cmd.PruneWhoWas(ServerInstance->Time());
+				break;
+			case WhowasRequest::WHOWAS_MAINTAIN:
+				cmd.MaintainWhoWas(ServerInstance->Time());
+				break;
+		}
+		return NULL;
+	}
+
+	Version GetVersion()
+	{
+		return Version("WHOWAS Command", VF_VENDOR);
+	}
+};
+
+MODULE_INIT(ModuleWhoWas)