/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2008 Pippijn van Steenhoven <pip88nl@gmail.com>
 *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 2006-2007 Robin Burchell <robin+git@viroteck.net>
 *   Copyright (C) 2006 John Brooks <john.brooks@dereferenced.net>
 *   Copyright (C) 2006 Craig Edwards <craigedwards@brainbox.cc>
 *   Copyright (C) 2006 Oliver Lupton <oliverlupton@gmail.com>
 *
 * 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 channel mode +J (delay rejoin after kick) */

typedef std::map<User*, time_t> delaylist;

/** Handles channel mode +J
 */
class KickRejoin : public ParamChannelModeHandler
{
 public:
	SimpleExtItem<delaylist> ext;
	KickRejoin(Module* Creator) : ParamChannelModeHandler(Creator, "kicknorejoin", 'J'), ext("norejoinusers", Creator) { }

	bool ParamValidate(std::string& parameter)
	{
		int v = atoi(parameter.c_str());
		if (v <= 0)
			return false;
		parameter = ConvToStr(v);
		return true;
	}

	ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding)
	{
		ModeAction rv = ParamChannelModeHandler::OnModeChange(source, dest, channel, parameter, adding);
		if (rv == MODEACTION_ALLOW && !adding)
			ext.unset(channel);
		return rv;
	}
};

class ModuleKickNoRejoin : public Module
{
	KickRejoin kr;

public:

	ModuleKickNoRejoin()
		: kr(this)
	{
		if (!ServerInstance->Modes->AddMode(&kr))
			throw ModuleException("Could not add new modes!");
		ServerInstance->Extensions.Register(&kr.ext);
		Implementation eventlist[] = { I_OnUserPreJoin, I_OnUserKick };
		ServerInstance->Modules->Attach(eventlist, this, 2);
	}

	ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
	{
		if (chan)
		{
			delaylist* dl = kr.ext.get(chan);
			if (dl)
			{
				std::vector<User*> itemstoremove;

				for (delaylist::iterator iter = dl->begin(); iter != dl->end(); iter++)
				{
					if (iter->second > ServerInstance->Time())
					{
						if (iter->first == user)
						{
							std::string modeparam = chan->GetModeParameter(&kr);
							user->WriteNumeric(ERR_DELAYREJOIN, "%s %s :You must wait %s seconds after being kicked to rejoin (+J)",
								user->nick.c_str(), chan->name.c_str(), modeparam.c_str());
							return MOD_RES_DENY;
						}
					}
					else
					{
						// Expired record, remove.
						itemstoremove.push_back(iter->first);
					}
				}

				for (unsigned int i = 0; i < itemstoremove.size(); i++)
					dl->erase(itemstoremove[i]);

				if (!dl->size())
					kr.ext.unset(chan);
			}
		}
		return MOD_RES_PASSTHRU;
	}

	void OnUserKick(User* source, Membership* memb, const std::string &reason, CUList& excepts)
	{
		if (memb->chan->IsModeSet(&kr) && (source != memb->user))
		{
			delaylist* dl = kr.ext.get(memb->chan);
			if (!dl)
			{
				dl = new delaylist;
				kr.ext.set(memb->chan, dl);
			}
			(*dl)[memb->user] = ServerInstance->Time() + ConvToInt(memb->chan->GetModeParameter(&kr));
		}
	}

	~ModuleKickNoRejoin()
	{
	}

	Version GetVersion()
	{
		return Version("Channel mode to delay rejoin after kick", VF_VENDOR);
	}
};


MODULE_INIT(ModuleKickNoRejoin)