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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * Mark Spencer <markster@digium.com>
 *
 * See http://www.asterisk.org for more information about
 * the Asterisk project. Please do not directly contact
 * any of the maintainers of this project for assistance;
 * the project provides a web site, mailing lists and IRC
 * channels for your use.
 *
 * This program is free software, distributed under the terms of
 * the GNU General Public License Version 2. See the LICENSE file
 * at the top of the source tree.
 */

/*! \file
 *
 * \brief Caller*id name lookup - Look up the caller's name via DNS
 * 
 * \ingroup applications
 */

#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>

#include "asterisk.h"

ASTERISK_FILE_VERSION(__FILE__, "$Revision$")

#include "asterisk/logger.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/options.h"
#include "asterisk/module.h"
#include "asterisk/enum.h"
#include "asterisk/utils.h"

STANDARD_LOCAL_USER;

LOCAL_USER_DECL;

static char *tdesc = "TXTCIDName";

static char *app = "TXTCIDName";

static char *synopsis = "Lookup caller name from TXT record";

static char *descrip = 
"  TXTCIDName(<CallerIDNumber>):  Looks up a Caller Name via DNS and sets\n"
"the variable 'TXTCIDNAME'. TXTCIDName will either be blank\n"
"or return the value found in the TXT record in DNS.\n" ;

static int txtcidname_exec(struct ast_channel *chan, void *data)
{
	int res=0;
	char tech[80];
	char txt[256] = "";
	char dest[80];
	struct localuser *u;
	static int dep_warning = 0;

	LOCAL_USER_ADD(u);
	
	if (!dep_warning) {
		ast_log(LOG_WARNING, "The TXTCIDName application has been deprecated in favor of the TXTCIDNAME dialplan function.\n");
		dep_warning = 1;
	}
	
	if (ast_strlen_zero(data)) {
		ast_log(LOG_WARNING, "TXTCIDName requires an argument (extension)\n");
		res = 1;
	}
	
	if (!res) {
		res = ast_get_txt(chan, data, dest, sizeof(dest), tech, sizeof(tech), txt, sizeof(txt));
	}
	
	/* Parse it out */
	if (res > 0) {
		if (!ast_strlen_zero(txt)) {
			pbx_builtin_setvar_helper(chan, "TXTCIDNAME", txt);
			if (option_debug > 1)
				ast_log(LOG_DEBUG, "TXTCIDNAME got '%s'\n", txt);
		}
	}
	if (!res) {
		/* Look for a "busy" place */
		ast_goto_if_exists(chan, chan->context, chan->exten, chan->priority + 101);
	} else if (res > 0)
		res = 0;

	LOCAL_USER_REMOVE(u);

	return res;
}

int unload_module(void)
{
	int res;

	res = ast_unregister_application(app);
	
	STANDARD_HANGUP_LOCALUSERS;

	return res;	
}

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

char *description(void)
{
	return tdesc;
}

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

char *key()
{
	return ASTERISK_GPL_KEY;
}