/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * App to transmit a text message
 * 
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * Mark Spencer <markster@digium.com>
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License
 */
 
#include <asterisk/lock.h>
#include <asterisk/file.h>
#include <asterisk/logger.h>
#include <asterisk/channel.h>
#include <asterisk/pbx.h>
#include <asterisk/module.h>
#include <asterisk/translate.h>
#include <asterisk/image.h>
#include <string.h>
#include <stdlib.h>

static char *tdesc = "Send Text Applications";

static char *app = "SendText";

static char *synopsis = "Send a Text Message";

static char *descrip = 
"  SendText(text): Sends text to client.  If the client\n"
"does not support text transport, and  there  exists  a  step  with\n"
"priority  n + 101,  then  execution  will  continue  at that step.\n"
"Otherwise, execution will continue at  the  next  priority  level.\n"
"SendText only returns 0  if  the  text  was  sent  correctly  or  if\n"
"the channel  does  not  support text transport,  and -1 otherwise.\n";

STANDARD_LOCAL_USER;

LOCAL_USER_DECL;

static int sendtext_exec(struct ast_channel *chan, void *data)
{
	int res = 0;
	struct localuser *u;
	if (!data || !strlen((char *)data)) {
		ast_log(LOG_WARNING, "SendText requires an argument (text)\n");
		return -1;
	}
	LOCAL_USER_ADD(u);
	ast_mutex_lock(&chan->lock);
	if (!chan->tech->send_text) {
		ast_mutex_unlock(&chan->lock);
		/* Does not support transport */
		if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + 101, chan->cid.cid_num))
			chan->priority += 100;
		LOCAL_USER_REMOVE(u);
		return 0;
	}
	ast_mutex_unlock(&chan->lock);
	res = ast_sendtext(chan, (char *)data);
	LOCAL_USER_REMOVE(u);
	return res;
}

int unload_module(void)
{
	STANDARD_HANGUP_LOCALUSERS;
	return ast_unregister_application(app);
}

int load_module(void)
{
	return ast_register_application(app, sendtext_exec, synopsis, descrip);
}

char *description(void)
{
	return tdesc;
}

int usecount(void)
{
	int res;
	STANDARD_USECOUNT(res);
	return res;
}

char *key()
{
	return ASTERISK_GPL_KEY;
}