/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2010 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"

/* $ModDesc: Provides support for oper-only chans via the +O channel mode */

class OperChans : public ModeHandler
{
 public:
	/* This is an oper-only mode */
	OperChans(Module* Creator) : ModeHandler(Creator, "operonly", 'O', PARAM_NONE, MODETYPE_CHANNEL) { oper = true; }

	ModeAction OnModeChange(User* source, User* dest, Channel* channel, std::string &parameter, bool adding)
	{
		if (adding)
		{
			if (!channel->IsModeSet('O'))
			{
				channel->SetMode('O',true);
				return MODEACTION_ALLOW;
			}
		}
		else
		{
			if (channel->IsModeSet('O'))
			{
				channel->SetMode('O',false);
				return MODEACTION_ALLOW;
			}
		}

		return MODEACTION_DENY;
	}
};

class ModuleOperChans : public Module
{
	OperChans oc;
 public:
	ModuleOperChans() : oc(this)
	{
		if (!ServerInstance->Modes->AddMode(&oc))
			throw ModuleException("Could not add new modes!");
		Implementation eventlist[] = { I_OnCheckBan, I_On005Numeric, I_OnUserPreJoin };
		ServerInstance->Modules->Attach(eventlist, this, 3);
	}

	ModResult OnUserPreJoin(User* user, Channel* chan, const char* cname, std::string &privs, const std::string &keygiven)
	{
		if (chan && chan->IsModeSet('O') && !IS_OPER(user))
		{
			user->WriteNumeric(ERR_CANTJOINOPERSONLY, "%s %s :Only IRC operators may join %s (+O is set)",
				user->nick.c_str(), chan->name.c_str(), chan->name.c_str());
			return MOD_RES_DENY;
		}
		return MOD_RES_PASSTHRU;
	}

	ModResult OnCheckBan(User *user, Channel *c, const std::string& mask)
	{
		if (mask[0] == 'O' && mask[1] == ':')
		{
			if (IS_OPER(user) && InspIRCd::Match(user->oper->name, mask.substr(2)))
				return MOD_RES_DENY;
		}
		return MOD_RES_PASSTHRU;
	}

	void On005Numeric(std::string &output)
	{
		ServerInstance->AddExtBanChar('O');
	}

	~ModuleOperChans()
	{
	}

	Version GetVersion()
	{
		return Version("Provides support for oper-only chans via the +O channel mode and 'O' extban", VF_VENDOR | VF_COMMON);
	}
};

MODULE_INIT(ModuleOperChans)