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/usr/include/inspircd/snomasks.h is in inspircd-dev 2.0.20-5build2.

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/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2010 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
 *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 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/>.
 */


#ifndef SNOMASKS_H
#define SNOMASKS_H

class Snomask
{
 public:
	std::string Description;
	std::string LastMessage;
	int Count;
	bool LastBlocked;
	char LastLetter;

	/** Create a new Snomask
	 */
	Snomask() : Count(0), LastBlocked(false), LastLetter(0)
	{
	}

	/** Sends a message to all opers with this snomask.
	 */
	void SendMessage(const std::string &message, char letter);

	/** Sends out the (last message repeated N times) message
	 */
	void Flush();
};

/** Snomask manager handles routing of SNOMASK (usermode +s) messages to opers.
 * Modules and the core can enable and disable snomask characters. If they do,
 * then sending snomasks using these characters becomes possible.
 */
class CoreExport SnomaskManager
{
 public:
	Snomask	masks[26];

	/** Create a new SnomaskManager
	 */
	SnomaskManager();

	/** Enable a snomask.
	 * @param letter The snomask letter to enable. Once enabled,
	 * server notices may be routed to users with this letter in
	 * their list, and users may add this letter to their list.
	 * @param description The descriptive text sent along with any
	 * server notices, at the start of the notice, e.g. "GLOBOPS".
	 */
	void EnableSnomask(char letter, const std::string &description);

	/** Write to all users with a given snomask (local server only)
	 * @param letter The snomask letter to write to
	 * @param text The text to send to the users
	 */
	void WriteToSnoMask(char letter, const std::string &text);

	/** Write to all users with a given snomask (local server only)
	 * @param letter The snomask letter to write to
	 * @param text A format string containing text to send
	 * @param ... Format arguments
	 */
	void WriteToSnoMask(char letter, const char* text, ...) CUSTOM_PRINTF(3, 4);

	/** Write to all users with a given snomask (sent globally)
	 * @param letter The snomask letter to write to
	 * @param text The text to send to the users
	 */
	void WriteGlobalSno(char letter, const std::string &text);

	/** Write to all users with a given snomask (sent globally)
	 * @param letter The snomask letter to write to
	 * @param text A format string containing text to send
	 * @param ... Format arguments
	 */
	void WriteGlobalSno(char letter, const char* text, ...) CUSTOM_PRINTF(3, 4);


	/** Called once per 5 seconds from the mainloop, this flushes any cached
	 * snotices. The way the caching works is as follows:
	 * Calls to WriteToSnoMask write to a cache, if the call is the same as it was
	 * for the previous call, then a count is incremented. If it is different,
	 * the previous message it just sent normally via NOTICE (with count if > 1)
	 * and the new message is cached. This acts as a sender in case the number of notices
	 * is not particularly significant, in order to keep notices going out.
	 */
	void FlushSnotices();
};

#endif