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/*
 * Asterisk -- A telephony toolkit for Linux.
 *
 * App to send DTMF digits
 * 
 * Copyright (C) 1999, Mark Spencer
 *
 * Mark Spencer <markster@linux-support.net>
 *
 * 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/options.h>
#include <string.h>
#include <stdlib.h>
#include <pthread.h>

static char *tdesc = "Send DTMF digits Application";

static char *app = "SendDTMF";

static char *synopsis = "Sends arbitrary DTMF digits";

static char *descrip = 
"  SendDTMF(digits): Sends DTMF digits on a channel.  Returns 0 on success"
"or -1 on a hangup.\n";

STANDARD_LOCAL_USER;

LOCAL_USER_DECL;

static int senddtmf_exec(struct ast_channel *chan, void *data)
{
	int res = 0;
	struct localuser *u;
	char *digits = data;
	struct ast_frame f;
	int x;
	if (!digits || !strlen(digits)) {
		ast_log(LOG_WARNING, "SendDTMF requires an argument (digits)\n");
		return -1;
	}
	LOCAL_USER_ADD(u);
	for (x=0;x<strlen(digits);x++) {
		memset(&f, 0, sizeof(f));
		f.frametype = AST_FRAME_DTMF;
		f.subclass = digits[x];
		f.src = "app_senddtmf";
		res = ast_write(chan, &f);
		if (res)
			break;
		/* Wait 250ms */
		res = ast_safe_sleep(chan, 250);
		if (res)
			break;
	}
	if (!res)
		if (option_verbose > 2)
			ast_verbose(VERBOSE_PREFIX_3 "Sent digit string '%s' on %s\n", digits, chan->name);
			
	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, senddtmf_exec, synopsis, descrip);
}

char *description(void)
{
	return tdesc;
}

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

char *key()
{
	return ASTERISK_GPL_KEY;
}