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/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 2007 Robin Burchell <robin+git@viroteck.net>
 *   Copyright (C) 2004-2006 Craig Edwards <craigedwards@brainbox.cc>
 *
 * This file is part of InspIRCd.  InspIRCd is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "inspircd.h"

/* $ModDesc: Provides support for the CHGHOST command */

/** Handle /CHGHOST
 */
class CommandChghost : public Command
{
 private:
	char* hostmap;
 public:
	CommandChghost (InspIRCd* Instance, char* hmap) : Command(Instance,"CHGHOST","o",2), hostmap(hmap)
	{
		this->source = "m_chghost.so";
		syntax = "<nick> <newhost>";
		TRANSLATE3(TR_NICK, TR_TEXT, TR_END);
	}

	CmdResult Handle(const std::vector<std::string> &parameters, User *user)
	{
		const char * x = parameters[1].c_str();

		if (parameters[1].length() > 63)
		{
			user->WriteServ("NOTICE %s :*** CHGHOST: Host too long", user->nick.c_str());
			return CMD_FAILURE;
		}

		for (; *x; x++)
		{
			if (!hostmap[(unsigned char)*x])
			{
				user->WriteServ("NOTICE "+std::string(user->nick)+" :*** CHGHOST: Invalid characters in hostname");
				return CMD_FAILURE;
			}
		}
		if (parameters[1].empty())
		{
			user->WriteServ("NOTICE %s :*** CHGHOST: Host must be specified", user->nick.c_str());
			return CMD_FAILURE;
		}

		User* dest = ServerInstance->FindNick(parameters[0]);

		if (!dest)
		{
			user->WriteNumeric(ERR_NOSUCHNICK, "%s %s :No such nick/channel", user->nick.c_str(), parameters[0].c_str());
			return CMD_FAILURE;
		}

		if (IS_LOCAL(dest))
		{
			if ((dest->ChangeDisplayedHost(parameters[1].c_str())) && (!ServerInstance->ULine(user->server)))
			{
				// fix by brain - ulines set hosts silently
				ServerInstance->SNO->WriteGlobalSno('a', std::string(user->nick)+" used CHGHOST to make the displayed host of "+dest->nick+" become "+dest->dhost);
			}

			/* ChangeDisplayedHost fixes it for us */
			return CMD_LOCALONLY;
		}

		/* route it! */
		return CMD_SUCCESS;

	}
};


class ModuleChgHost : public Module
{
	CommandChghost* mycommand;
	char hostmap[256];
 public:
	ModuleChgHost(InspIRCd* Me)
		: Module(Me)
	{
		OnRehash(NULL);
		mycommand = new CommandChghost(ServerInstance, hostmap);
		ServerInstance->AddCommand(mycommand);
		Implementation eventlist[] = { I_OnRehash };
		ServerInstance->Modules->Attach(eventlist, this, 1);
	}


	void OnRehash(User* user)
	{
		ConfigReader Conf(ServerInstance);
		std::string hmap = Conf.ReadValue("hostname", "charmap", 0);

		if (hmap.empty())
			hmap = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.-_/0123456789";

		memset(hostmap, 0, sizeof(hostmap));
		for (std::string::iterator n = hmap.begin(); n != hmap.end(); n++)
			hostmap[(unsigned char)*n] = 1;
	}

	~ModuleChgHost()
	{
	}

	Version GetVersion()
	{
		return Version("$Id$", VF_COMMON | VF_VENDOR, API_VERSION);
	}

};

MODULE_INIT(ModuleChgHost)