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/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2007 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: Adds user mode +c, which if set, users must be on a common channel with you to private message you */

/** Handles user mode +c
 */
class PrivacyMode : public SimpleUserModeHandler
{
 public:
	PrivacyMode(Module* Creator) : SimpleUserModeHandler(Creator, "deaf_commonchan", 'c') { }
};

class ModulePrivacyMode : public Module
{
	PrivacyMode pm;
 public:
	ModulePrivacyMode() : pm(this)
	{
	}

	void init()
	{
		if (!ServerInstance->Modes->AddMode(&pm))
			throw ModuleException("Could not add new modes!");
		Implementation eventlist[] = { I_OnUserPreMessage, I_OnUserPreNotice };
		ServerInstance->Modules->Attach(eventlist, this, sizeof(eventlist)/sizeof(Implementation));
	}

	virtual ~ModulePrivacyMode()
	{
	}

	virtual Version GetVersion()
	{
		return Version("Adds user mode +c, which if set, users must be on a common channel with you to private message you", VF_VENDOR);
	}

	virtual ModResult OnUserPreMessage(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
	{
		if (target_type == TYPE_USER)
		{
			User* t = (User*)dest;
			if (!IS_OPER(user) && (t->IsModeSet('c')) && (!ServerInstance->ULine(user->server)) && !user->SharesChannelWith(t))
			{
				user->WriteNumeric(ERR_CANTSENDTOUSER, "%s %s :You are not permitted to send private messages to this user (+c set)", user->nick.c_str(), t->nick.c_str());
				return MOD_RES_DENY;
			}
		}
		return MOD_RES_PASSTHRU;
	}

	virtual ModResult OnUserPreNotice(User* user,void* dest,int target_type, std::string &text, char status, CUList &exempt_list)
	{
		return OnUserPreMessage(user, dest, target_type, text, status, exempt_list);
	}
};


MODULE_INIT(ModulePrivacyMode)