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/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2019 Matt Schatz <genius3000@g3k.solutions>
 *   Copyright (C) 2018 Sadie Powell <sadie@witchery.services>
 *   Copyright (C) 2013-2014 Attila Molnar <attilamolnar@hush.com>
 *   Copyright (C) 2013 Daniel Vassdal <shutter@canternet.org>
 *   Copyright (C) 2013 Adam <Adam@anope.org>
 *   Copyright (C) 2012, 2019 Robby <robby@chatbelgie.be>
 *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
 *   Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
 *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
 *   Copyright (C) 2006, 2010 Craig Edwards <brain@inspircd.org>
 *
 * 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"

void SnomaskManager::FlushSnotices()
{
	for (int i=0; i < 26; i++)
		masks[i].Flush();
}

void SnomaskManager::EnableSnomask(char letter, const std::string &type)
{
	if (letter >= 'a' && letter <= 'z')
		masks[letter - 'a'].Description = type;
}

void SnomaskManager::WriteToSnoMask(char letter, const std::string &text)
{
	if (letter >= 'a' && letter <= 'z')
		masks[letter - 'a'].SendMessage(text, letter);
	if (letter >= 'A' && letter <= 'Z')
		masks[letter - 'A'].SendMessage(text, letter);
}

void SnomaskManager::WriteGlobalSno(char letter, const std::string& text)
{
	WriteToSnoMask(letter, text);
	letter = toupper(letter);
	ServerInstance->PI->SendSNONotice(letter, text);
}

void SnomaskManager::WriteToSnoMask(char letter, const char* text, ...)
{
	std::string textbuffer;
	VAFORMAT(textbuffer, text, text);
	this->WriteToSnoMask(letter, textbuffer);
}

void SnomaskManager::WriteGlobalSno(char letter, const char* text, ...)
{
	std::string textbuffer;
	VAFORMAT(textbuffer, text, text);
	this->WriteGlobalSno(letter, textbuffer);
}

SnomaskManager::SnomaskManager()
{
	EnableSnomask('c',"CONNECT");			/* Local connect notices */
	EnableSnomask('q',"QUIT");			/* Local quit notices */
	EnableSnomask('k',"KILL");			/* Kill notices */
	EnableSnomask('o',"OPER");			/* Oper up/down notices */
	EnableSnomask('a',"ANNOUNCEMENT");		/* formerly WriteOpers() - generic notices to all opers */
	EnableSnomask('x',"XLINE");			/* X-line notices (G/Z/Q/K/E/R/SHUN/CBan) */
	EnableSnomask('t',"STATS");			/* Local or remote stats request */
}

bool SnomaskManager::IsSnomaskUsable(char ch) const
{
	return ((isalpha(ch)) && (!masks[tolower(ch) - 'a'].Description.empty()));
}

Snomask::Snomask()
	: Count(0)
{
}

void Snomask::SendMessage(const std::string& message, char letter)
{
	if ((!ServerInstance->Config->NoSnoticeStack) && (message == LastMessage) && (letter == LastLetter))
	{
		Count++;
		return;
	}

	this->Flush();

	std::string desc = GetDescription(letter);
	ModResult MOD_RESULT;
	FIRST_MOD_RESULT(OnSendSnotice, MOD_RESULT, (letter, desc, message));
	if (MOD_RESULT == MOD_RES_DENY)
		return;

	Snomask::Send(letter, desc, message);
	LastMessage = message;
	LastLetter = letter;
	Count++;
}

void Snomask::Flush()
{
	if (Count > 1)
	{
		std::string desc = GetDescription(LastLetter);
		std::string msg = "(last message repeated " + ConvToStr(Count) + " times)";

		FOREACH_MOD(OnSendSnotice, (LastLetter, desc, msg));
		Snomask::Send(LastLetter, desc, msg);
	}

	LastMessage.clear();
	Count = 0;
}

void Snomask::Send(char letter, const std::string& desc, const std::string& msg)
{
	ServerInstance->Logs->Log(desc, LOG_DEFAULT, msg);
	const std::string finalmsg = InspIRCd::Format("*** %s: %s", desc.c_str(), msg.c_str());

	/* Only opers can receive snotices, so we iterate the oper list */
	const UserManager::OperList& opers = ServerInstance->Users->all_opers;
	for (UserManager::OperList::const_iterator i = opers.begin(); i != opers.end(); ++i)
	{
		User* user = *i;
		// IsNoticeMaskSet() returns false for opers who aren't +s, no need to check for it separately
		if (IS_LOCAL(user) && user->IsNoticeMaskSet(letter))
			user->WriteNotice(finalmsg);
	}
}

std::string Snomask::GetDescription(char letter) const
{
	std::string ret;
	if (isupper(letter))
		ret = "REMOTE";
	if (!Description.empty())
		ret += Description;
	else
		ret += std::string("SNO-") + (char)tolower(letter);
	return ret;
}