/*
 * Copyright (C) 2001-2005 FhG FOKUS
 * Copyright (C) 2006-2007 iptelorg GmbH
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * Kamailio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef _DB_CMD_H
#define _DB_CMD_H 1

/** \ingroup DB_API
 * @{
 */

/** \file
 * Representation of database commands
 */

#include "db_fld.h"
#include "db_drv.h"
#include "db_gen.h"
#include "db_res.h"
#include "db_rec.h"
#include "db_ctx.h"

#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */

	struct db_cmd;
	struct db_res;
	struct db_rec;

	typedef int (*db_exec_func_t)(struct db_res *res, struct db_cmd *cmd);
	typedef int (*db_first_func_t)(struct db_res *res);
	typedef int (*db_next_func_t)(struct db_res *res);


	enum db_cmd_type
	{
		DB_PUT, /* Insert or update new record in database */
		DB_DEL, /* Delete all matching records from database */
		DB_GET, /* Get matching records from database */
		DB_UPD, /* Update matching records in database */
		DB_SQL, /* Raw SQL query */
	};

	/**
 * Structure db_cmd describes command in DB-API
 */
	typedef struct db_cmd
	{
		db_gen_t
				gen; /**< Generic part of the structure, must be the 1st attribute */
		enum db_cmd_type type; /**< Type of the command to be executed */
		struct db_ctx
				*ctx; /**< Context containing database connections to be used */
		str table;	  /**< Name of the table to perform the command on */
		db_exec_func_t exec
				[DB_PAYLOAD_MAX]; /**< Array of exec functions provided by modules */
		db_first_func_t first[DB_PAYLOAD_MAX];
		db_next_func_t next[DB_PAYLOAD_MAX];
		db_fld_t *result; /**< Fields to to be returned in result */
		db_fld_t *match;  /**< Fields describing WHERE clause */
		db_fld_t *
				vals; /**< Fields with values for UPDATE and INSERT statements */
		unsigned int result_count; /* Number of fields in the result set */
		unsigned int match_count;  /* Number of fields in the result set */
		unsigned int vals_count;   /* Number of fields in the result set */
	} db_cmd_t;


#define DB_SET_EXEC(db_cmd, func)                \
	do {                                         \
		(db_cmd)->exec[db_payload_idx] = (func); \
	} while(0)


	struct db_cmd *db_cmd(enum db_cmd_type type, struct db_ctx *ctx,
			char *table, db_fld_t *result, db_fld_t *match, db_fld_t *value);
	void db_cmd_free(struct db_cmd *cmd);

	int db_exec(struct db_res **res, struct db_cmd *cmd);

	int db_getopt(db_cmd_t *cmd, char *optname, ...);

	int db_setopt(db_cmd_t *cmd, char *optname, ...);

#ifdef __cplusplus
}
#endif /* __cplusplus */

/** @} */

#endif /* _DB_CMD_H */
