construct/modules/chm_nocolour.c

/*
 * charybdis: an advanced ircd.
 * chm_nocolour: strip colours (+c mode).
 *
 * Copyright (c) 2012 William Pitcock <nenolod@dereferenced.org>
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice is present in all copies.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "stdinc.h"
#include "modules.h"
#include "hook.h"
#include "client.h"
#include "ircd.h"
#include "send.h"
#include "s_conf.h"
#include "s_user.h"
#include "s_serv.h"
#include "numeric.h"
#include "chmode.h"
#include "inline/stringops.h"

static const char chm_nocolour_desc[] =
	"Enables channel mode +c that filters colours and formatting from a channel";

static char buf[BUFSIZE];
static unsigned int mode_nocolour;

static void chm_nocolour_process(hook_data_privmsg_channel *);

mapi_hfn_list_av1 chm_nocolour_hfnlist[] = {
	{ "privmsg_channel", (hookfn) chm_nocolour_process },
	{ NULL, NULL }
};

static void
chm_nocolour_process(hook_data_privmsg_channel *data)
{
	/* don't waste CPU if message is already blocked */
	if (data->approved)
		return;

	if (data->chptr->mode.mode & mode_nocolour)
	{
		rb_strlcpy(buf, data->text, sizeof buf);
		strip_colour(buf);

		data->text = buf;
	}
}

static int
_modinit(void)
{
	mode_nocolour = cflag_add('c', chm_simple);
	if (mode_nocolour == 0)
		return -1;

	return 0;
}

static void
_moddeinit(void)
{
	cflag_orphan('c');
}

DECLARE_MODULE_AV2(chm_nocolour, _modinit, _moddeinit, NULL, NULL, chm_nocolour_hfnlist, NULL, NULL, chm_nocolour_desc);