/*       +------------------------------------+
 *       | 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.
 *
 * ---------------------------------------------------
 */

/* $ModDesc: Adds timed bans */

#include "inspircd.h"

/** Holds a timed ban
 */
class TimedBan
{
 public:
	std::string channel;
	std::string mask;
	time_t expire;
};

typedef std::vector<TimedBan> timedbans;
timedbans TimedBanList;

/** Handle /TBAN
 */
class CommandTban : public Command
{
 public:
	CommandTban(Module* Creator) : Command(Creator,"TBAN", 3)
	{
		syntax = "<channel> <duration> <banmask>";
		TRANSLATE4(TR_TEXT, TR_TEXT, TR_TEXT, TR_END);
	}

	CmdResult Handle (const std::vector<std::string> &parameters, User *user)
	{
		Channel* channel = ServerInstance->FindChan(parameters[0]);
		if (channel)
		{
			int cm = channel->GetPrefixValue(user);
			if ((cm == HALFOP_VALUE) || (cm == OP_VALUE))
			{
				if (!ServerInstance->IsValidMask(parameters[2]))
				{
					user->WriteServ("NOTICE "+std::string(user->nick)+" :Invalid ban mask");
					return CMD_FAILURE;
				}
				for (BanList::iterator i = channel->bans.begin(); i != channel->bans.end(); i++)
				{
					if (!strcasecmp(i->data.c_str(), parameters[2].c_str()))
					{
						user->WriteServ("NOTICE "+std::string(user->nick)+" :The ban "+parameters[2]+" is already on the banlist of "+parameters[0]);
						return CMD_FAILURE;
					}
				}
				TimedBan T;
				std::string channelname = parameters[0];
				long duration = ServerInstance->Duration(parameters[1]);
				unsigned long expire = duration + ServerInstance->Time();
				if (duration < 1)
				{
					user->WriteServ("NOTICE "+std::string(user->nick)+" :Invalid ban time");
					return CMD_FAILURE;
				}
				std::string mask = parameters[2];
				std::vector<std::string> setban;
				setban.push_back(parameters[0]);
				setban.push_back("+b");
				setban.push_back(parameters[2]);
				// use CallCommandHandler to make it so that the user sets the mode
				// themselves
				ServerInstance->CallCommandHandler("MODE",setban,user);
				/* Check if the ban was actually added (e.g. banlist was NOT full) */
				bool was_added = false;
				for (BanList::iterator i = channel->bans.begin(); i != channel->bans.end(); i++)
					if (!strcasecmp(i->data.c_str(), mask.c_str()))
						was_added = true;
				if (was_added)
				{
					CUList tmp;
					T.channel = channelname;
					T.mask = mask;
					T.expire = expire;
					TimedBanList.push_back(T);
					channel->WriteAllExcept(user, true, '@', tmp, "NOTICE %s :%s added a timed ban on %s lasting for %ld seconds.", channel->name.c_str(), user->nick.c_str(), mask.c_str(), duration);
					ServerInstance->PI->SendChannelNotice(channel, '@', user->nick + " added a timed ban on " + mask + " lasting for " + ConvToStr(duration) + " seconds.");
					return CMD_SUCCESS;
				}
				return CMD_FAILURE;
			}
			else
			{
				user->WriteNumeric(482, "%s %s :You do not have permission to change modes on this channel",
					user->nick.c_str(), channel->name.c_str());
			}
			return CMD_FAILURE;
		}
		user->WriteNumeric(401, "%s %s :No such channel",user->nick.c_str(), parameters[0].c_str());
		return CMD_FAILURE;
	}

	RouteDescriptor GetRouting(User* user, const std::vector<std::string>& parameters)
	{
		return ROUTE_BROADCAST;
	}
};

class ModuleTimedBans : public Module
{
	CommandTban cmd;
 public:
	ModuleTimedBans()
		: cmd(this)
	{
		ServerInstance->AddCommand(&cmd);
		TimedBanList.clear();
		Implementation eventlist[] = { I_OnDelBan, I_OnBackgroundTimer };
		ServerInstance->Modules->Attach(eventlist, this, 2);
	}

	virtual ~ModuleTimedBans()
	{
		TimedBanList.clear();
	}

	virtual ModResult OnDelBan(User* source, Channel* chan, const std::string &banmask)
	{
		irc::string listitem = banmask.c_str();
		irc::string thischan = chan->name.c_str();
		for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end(); i++)
		{
			irc::string target = i->mask.c_str();
			irc::string tchan = i->channel.c_str();
			if ((listitem == target) && (tchan == thischan))
			{
				TimedBanList.erase(i);
				break;
			}
		}
		return MOD_RES_PASSTHRU;
	}

	virtual void OnBackgroundTimer(time_t curtime)
	{
		for (timedbans::iterator i = TimedBanList.begin(); i != TimedBanList.end();)
		{
			if (curtime > i->expire)
			{
				std::string chan = i->channel;
				std::string mask = i->mask;
				Channel* cr = ServerInstance->FindChan(chan);
				i = TimedBanList.erase(i);
				if (cr)
				{
					std::vector<std::string> setban;
					setban.push_back(chan);
					setban.push_back("-b");
					setban.push_back(mask);

					CUList empty;
					std::string expiry = "*** Timed ban on " + chan + " expired.";
					cr->WriteAllExcept(ServerInstance->FakeClient, true, '@', empty, "NOTICE %s :%s", cr->name.c_str(), expiry.c_str());
					ServerInstance->PI->SendChannelNotice(cr, '@', expiry);

					ServerInstance->SendMode(setban, ServerInstance->FakeClient);
					ServerInstance->PI->SendMode(chan, ServerInstance->Modes->GetLastParseParams(), ServerInstance->Modes->GetLastParseTranslate());
				}
			}
			else
				++i;
		}
	}

	virtual Version GetVersion()
	{
		return Version("Adds timed bans", VF_COMMON | VF_VENDOR);
	}
};

MODULE_INIT(ModuleTimedBans)