WB 2.08.x

<?php

/**

 *

 * @category        framework

 * @package         database

 * @author          WebsiteBaker Project

 * @copyright       2004-2009, Ryan Djurovich

 * @copyright       2009-2011, Website Baker Org. e.V.

 * @link            http://www.websitebaker2.org/

 * @license         http://www.gnu.org/licenses/gpl.html

 * @platform        WebsiteBaker 2.8.x

 * @requirements    PHP 5.2.2 and higher

 * @version         $Id: class.database.php 1549 2011-12-19 22:44:59Z Luisehahne $

 * @filesource      $HeadURL: svn://isteam.dynxs.de/wb-archiv/branches/2.8.x/wb/framework/class.database.php $

 * @lastmodified    $Date: 2011-12-19 23:44:59 +0100 (Mon, 19 Dec 2011) $

 *

 */

/*

Database class

This class will be used to interface between the database

and the Website Baker code

*/

/* -------------------------------------------------------- */

// Must include code to stop this file being accessed directly

if(!defined('WB_PATH')) {

	require_once(dirname(__FILE__).'/globalExceptionHandler.php');

	throw new IllegalFileException();

}

/* -------------------------------------------------------- */

if(!defined('DB_URL')) {

	//define('DB_URL', DB_TYPE.'://'.DB_USERNAME.':'.DB_PASSWORD.'@'.DB_HOST.'/'.DB_NAME);

}

define('DATABASE_CLASS_LOADED', true);

class database {

	private $db_handle  = null; // readonly from outside

	private $connected  = false;

	private $error      = '';

	private $error_type = '';

	private $message    = array();

	// Set DB_URL

	function database($url = '') {

		// Connect to database

		$this->connect();

		// Check for database connection error

		if($this->is_error()) {

			die($this->get_error());

		}

	}

	// Connect to the database

	function connect() {

		$status = $this->db_handle = mysql_connect(DB_HOST, DB_USERNAME, DB_PASSWORD);

		if(mysql_error()) {

			$this->connected = false;

			$this->error = mysql_error();

		} else {

			if(!mysql_select_db(DB_NAME)) {

				$this->connected = false;

				$this->error = mysql_error();

			} else {

				$this->connected = true;

			}

		}

		return $this->connected;

	}

	// Disconnect from the database

	function disconnect() {

		if($this->connected==true) {

			mysql_close();

			return true;

		} else {

			return false;

		}

	}

	// Run a query

	function query($statement) {

		$mysql = new mysql();

		$mysql->query($statement);

		$this->set_error($mysql->error());

		if($mysql->error()) {

			return null;

		} else {

			return $mysql;

		}

	}

	// Gets the first column of the first row

	function get_one( $statement )

	{

		$fetch_row = mysql_fetch_array(mysql_query($statement) );

		$result = $fetch_row[0];

		$this->set_error(mysql_error());

		if(mysql_error()) {

			return null;

		} else {

			return $result;

		}

	}

	// Set the DB error

	function set_error($message = null) {

		global $TABLE_DOES_NOT_EXIST, $TABLE_UNKNOWN;

		$this->error = $message;

		if(strpos($message, 'no such table')) {

			$this->error_type = $TABLE_DOES_NOT_EXIST;

		} else {

			$this->error_type = $TABLE_UNKNOWN;

		}

	}

	// Return true if there was an error

	function is_error() {

		return (!empty($this->error)) ? true : false;

	}

	// Return the error

	function get_error() {

		return $this->error;

	}

/*

 * default Getter

 */

	public function __get($var_name)

	{

		if($var_name == 'db_handle')

		{

			return $this->db_handle;

		}

		return null;

	}

/*

 * @param string $table_name: full name of the table (incl. TABLE_PREFIX)

 * @param string $field_name: name of the field to seek for

 * @return bool: true if field exists

 */

	public function field_exists($table_name, $field_name)

	{

		$sql = 'DESCRIBE `'.$table_name.'` `'.$field_name.'` ';

		$query = $this->query($sql);

		return ($query->numRows() != 0);

	}

/*

 * @param string $table_name: full name of the table (incl. TABLE_PREFIX)

 * @param string $index_name: name of the index to seek for

 * @return bool: true if field exists

 */

	public function index_exists($table_name, $index_name, $number_fields = 0)

	{

		$number_fields = intval($number_fields);

		$keys = 0;

		$sql = 'SHOW INDEX FROM `'.$table_name.'`';

		if( ($res_keys = $this->query($sql)) )

		{

			while(($rec_key = $res_keys->fetchRow()))

			{

				if( $rec_key['Key_name'] == $index_name )

				{

					$keys++;

				}

			}

		}

		if( $number_fields == 0 )

		{

			return ($keys != $number_fields);

		}else

		{

			return ($keys == $number_fields);

		}

	}

/*

 * @param string $table_name: full name of the table (incl. TABLE_PREFIX)

 * @param string $field_name: name of the field to add

 * @param string $description: describes the new field like ( INT NOT NULL DEFAULT '0')

 * @return bool: true if successful, otherwise false and error will be set

 */

	public function field_add($table_name, $field_name, $description)

	{

		if( !$this->field_exists($table_name, $field_name) )

		{ // add new field into a table

			$sql = 'ALTER TABLE `'.$table_name.'` ADD '.$field_name.' '.$description.' ';

			$query = $this->query($sql);

			$this->set_error(mysql_error());

			if( !$this->is_error() )

			{

				return ( $this->field_exists($table_name, $field_name) ) ? true : false;

			}

		}else

		{

			$this->set_error('field \''.$field_name.'\' already exists');

		}

		return false;

	}

/*

 * @param string $table_name: full name of the table (incl. TABLE_PREFIX)

 * @param string $field_name: name of the field to add

 * @param string $description: describes the new field like ( INT NOT NULL DEFAULT '0')

 * @return bool: true if successful, otherwise false and error will be set

 */

	public function field_modify($table_name, $field_name, $description)

	{

		$retval = false;

		if( $this->field_exists($table_name, $field_name) )

		{ // modify a existing field in a table

			$sql  = 'ALTER TABLE `'.$table_name.'` MODIFY `'.$field_name.'` '.$description;

			$retval = ( $this->query($sql) ? true : false);

			$this->set_error(mysql_error());

		}

		return $retval;

	}

/*

 * @param string $table_name: full name of the table (incl. TABLE_PREFIX)

 * @param string $field_name: name of the field to remove

 * @return bool: true if successful, otherwise false and error will be set

 */

	public function field_remove($table_name, $field_name)

	{

		$retval = false;

		if( $this->field_exists($table_name, $field_name) )

		{ // modify a existing field in a table

			$sql  = 'ALTER TABLE `'.$table_name.'` DROP `'.$field_name.'`';

			$retval = ( $this->query($sql) ? true : false );

		}

		return $retval;

	}

/*

 * @param string $table_name: full name of the table (incl. TABLE_PREFIX)

 * @param string $index_name: name of the new index

 * @param string $field_list: comma seperated list of fields for this index

 * @param string $index_type: kind of index (UNIQUE, PRIMARY, '')

 * @return bool: true if successful, otherwise false and error will be set

 */

	public function index_add($table_name, $index_name, $field_list, $index_type = '')

	{

		$retval = false;

		$field_list = str_replace(' ', '', $field_list);

		$field_list = explode(',', $field_list);

		$number_fields = sizeof($field_list);

		$field_list = '`'.implode('`,`', $field_list).'`';

		if( $this->index_exists($table_name, $index_name, $number_fields) ||

		    $this->index_exists($table_name, $index_name))

		{

			$sql  = 'ALTER TABLE `'.$table_name.'` ';

			$sql .= 'DROP INDEX `'.$index_name.'`';

			if( $this->query($sql))

			{

				$sql  = 'ALTER TABLE `'.$table_name.'` ';

				$sql .= 'ADD '.$index_type.' `'.$index_name.'` ( '.$field_list.' ); ';

				if( $this->query($sql)) { $retval = true; }

			}

		}

		return $retval;

	}

/*

 * @param string $table_name: full name of the table (incl. TABLE_PREFIX)

 * @param string $field_name: name of the field to remove

 * @return bool: true if successful, otherwise false and error will be set

 */

	public function index_remove($table_name, $index_name)

	{

		$retval = false;

		if( $this->index_exists($table_name, $index_name) )

		{ // modify a existing field in a table

			$sql  = 'ALTER TABLE `'.$table_name.'` DROP INDEX `'.$index_name.'`';

			$retval = ( $this->query($sql) ? true : false );

		}

		return $retval;

	}

	/**

	* retuns the type of the engine used for requested table

	* @param string $table name of the table, including prefix

	* @return boolean/string false on error, or name of the engine (myIsam/InnoDb)

	*/

	public function getTableEngine($table)

	{

		$retVal = false;

		$mysqlVersion = mysql_get_server_info($this->db_handle);

		$engineValue = (version_compare($mysqlVersion, '5.0') < 0) ? 'Type' : 'Engine';

		$sql = "SHOW TABLE STATUS FROM " . DB_NAME . " LIKE '" . $table . "'";

		if(($result = $this->query($sql))) {

			if(($row = $result->fetchRow(MYSQL_ASSOC))) {

				$retVal = $row[$engineValue];

			}

		}

		return $retVal;

	}

} /// end of class database

define('MYSQL_SEEK_FIRST', 0);

define('MYSQL_SEEK_LAST', -1);

class mysql {

	// Run a query

	function query($statement) {

		$this->result = mysql_query($statement);

		$this->error = mysql_error();

		return $this->result;

	}

	// Fetch num rows

	function numRows() {

		return mysql_num_rows($this->result);

	}

	// Fetch row  $typ = MYSQL_ASSOC, MYSQL_NUM, MYSQL_BOTH

	function fetchRow($typ = MYSQL_BOTH) {

		return mysql_fetch_array($this->result, $typ);

	}

	function rewind()

	{

		return $this->seekRow();

	}

	function seekRow( $position = MYSQL_SEEK_FIRST )

	{

		$pmax = $this->numRows() - 1;

		$p = (($position < 0 || $position > $pmax) ? $pmax : $position);

		return mysql_data_seek($this->result, $p);

	}

	// Get error

	function error() {

		if(isset($this->error)) {

			return $this->error;

		} else {

			return null;

		}

	}

}

/* this function is placed inside this file temporarely until a better place is found */

/*  function to update a var/value-pair(s) in table ****************************

 *  nonexisting keys are inserted

 *  @param string $table: name of table to use (without prefix)

 *  @param mixed $key:    a array of key->value pairs to update

 *                        or a string with name of the key to update

 *  @param string $value: a sting with needed value, if $key is a string too

 *  @return bool:  true if any keys are updated, otherwise false

 */

	function db_update_key_value($table, $key, $value = '')

	{

		global $database;

		if( !is_array($key))

		{

			if( trim($key) != '' )

			{

				$key = array( trim($key) => trim($value) );

			} else {

				$key = array();

			}

		}

		$retval = true;

		foreach( $key as $index=>$val)

		{

			$index = strtolower($index);

			$sql = 'SELECT COUNT(`setting_id`) FROM `'.TABLE_PREFIX.$table.'` WHERE `name` = \''.$index.'\' ';

			if($database->get_one($sql))

			{

				$sql = 'UPDATE ';

				$sql_where = 'WHERE `name` = \''.$index.'\'';

			}else {

				$sql = 'INSERT INTO ';

				$sql_where = '';

			}

			$sql .= '`'.TABLE_PREFIX.$table.'` ';

			$sql .= 'SET `name` = \''.$index.'\', ';

			$sql .= '`value` = \''.$val.'\' '.$sql_where;

			if( !$database->query($sql) )

			{

				$retval = false;

			}

		}

		return $retval;

	}