/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 1999 - 2005, Digium, Inc.
 *
 * Portions Copyright (C) 2005, Anthony Minessale II
 *
 * 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  Call Detail Record related dialplan functions
 *
 * \author Anthony Minessale II 
 */

#include <stdlib.h>
#include <string.h>
#include <sys/types.h>

#include "asterisk.h"

/* ASTERISK_FILE_VERSION(__FILE__, "$Revision$") */

#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/logger.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"
#include "asterisk/cdr.h"

enum {
	OPT_RECURSIVE = (1 << 0),
} cdr_option_flags;

AST_APP_OPTIONS(cdr_func_options, {
	AST_APP_OPTION('r', OPT_RECURSIVE),
});

static char *builtin_function_cdr_read(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len) 
{
	char *ret;
	char *parse;
	struct ast_flags flags = {0};
	
	AST_DECLARE_APP_ARGS(args,
		AST_APP_ARG(variable);
		AST_APP_ARG(options);
	);

	if (ast_strlen_zero(data))
		return NULL;
	
	if (!chan->cdr)
		return NULL;

	if (!(parse = ast_strdupa(data)))
		return NULL;

	AST_STANDARD_APP_ARGS(args, parse);
	
	if(!ast_strlen_zero(args.options) ) {
		ast_app_parse_options(cdr_func_options, &flags, NULL, args.options);
	}
	ast_cdr_getvar(chan->cdr, args.variable, &ret, buf, len, (ast_test_flag(&flags,OPT_RECURSIVE) ) ? 1 : 0 );

	return ret;
}

static void builtin_function_cdr_write(struct ast_channel *chan, char *cmd, char *data, const char *value) 
{
	char *parse;
	struct ast_flags flags = {0};

	AST_DECLARE_APP_ARGS(args, 
		AST_APP_ARG(variable);
		AST_APP_ARG(options);
	);      

	if (ast_strlen_zero(data) || !value)
		return;
	
	if (!(parse = ast_strdupa(data)))
		return;

	AST_STANDARD_APP_ARGS(args, parse);

	/* check for a trailing flags argument */
	if(!ast_strlen_zero(args.options) ) {
		ast_app_parse_options(cdr_func_options, &flags, NULL, args.options);
	}

	if (!strcasecmp(args.variable, "accountcode"))
		ast_cdr_setaccount(chan, value);
	else if (!strcasecmp(args.variable, "userfield"))
		ast_cdr_setuserfield(chan, value);
	else if (chan->cdr)
		ast_cdr_setvar(chan->cdr, args.variable, value, (ast_test_flag(&flags,OPT_RECURSIVE) ) ? 1 : 0 );
}

#ifndef BUILTIN_FUNC
static
#endif
struct ast_custom_function cdr_function = {
	.name = "CDR",
	.synopsis = "Gets or sets a CDR variable",
	.desc= "Option 'r' searches the entire stack of CDRs on the channel\n",
	.syntax = "CDR(<name>[|options])",
	.read = builtin_function_cdr_read,
	.write = builtin_function_cdr_write,
};