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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Ldap
* @subpackage Filter
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Abstract.php 17826 2009-08-26 15:01:34Z sgehrig $
*/
/**
* Zend_Ldap_Filter_Abstract provides a base implementation for filters.
*
* @category Zend
* @package Zend_Ldap
* @subpackage Filter
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_Ldap_Filter_Abstract
{
/**
* Returns a string representation of the filter.
*
* @return string
*/
abstract public function toString();
/**
* Returns a string representation of the filter.
* @see toString()
*
* @return string
*/
public function __toString()
{
return $this->toString();
}
/**
* Negates the filter.
*
* @return Zend_Ldap_Filter_Abstract
*/
public function negate()
{
/**
* Zend_Ldap_Filter_Not
*/
require_once 'Zend/Ldap/Filter/Not.php';
return new Zend_Ldap_Filter_Not($this);
}
/**
* Creates an 'and' filter.
*
* @param Zend_Ldap_Filter_Abstract $filter,...
* @return Zend_Ldap_Filter_And
*/
public function addAnd($filter)
{
/**
* Zend_Ldap_Filter_And
*/
require_once 'Zend/Ldap/Filter/And.php';
$fa = func_get_args();
$args = array_merge(array($this), $fa);
return new Zend_Ldap_Filter_And($args);
}
/**
* Creates an 'or' filter.
*
* @param Zend_Ldap_Filter_Abstract $filter,...
* @return Zend_Ldap_Filter_Or
*/
public function addOr($filter)
{
/**
* Zend_Ldap_Filter_Or
*/
require_once 'Zend/Ldap/Filter/Or.php';
$fa = func_get_args();
$args = array_merge(array($this), $fa);
return new Zend_Ldap_Filter_Or($args);
}
/**
* Escapes the given VALUES according to RFC 2254 so that they can be safely used in LDAP filters.
*
* Any control characters with an ACII code < 32 as well as the characters with special meaning in
* LDAP filters "*", "(", ")", and "\" (the backslash) are converted into the representation of a
* backslash followed by two hex digits representing the hexadecimal value of the character.
* @see Net_LDAP2_Util::escape_filter_value() from Benedikt Hallinger <beni@php.net>
* @link http://pear.php.net/package/Net_LDAP2
* @author Benedikt Hallinger <beni@php.net>
*
* @param string|array $values Array of values to escape
* @return array Array $values, but escaped
*/
public static function escapeValue($values = array())
{
/**
* @see Zend_Ldap_Converter
*/
require_once 'Zend/Ldap/Converter.php';
if (!is_array($values)) $values = array($values);
foreach ($values as $key => $val) {
// Escaping of filter meta characters
$val = str_replace(array('\\', '*', '(', ')'), array('\5c', '\2a', '\28', '\29'), $val);
// ASCII < 32 escaping
$val = Zend_Ldap_Converter::ascToHex32($val);
if (null === $val) $val = '\0'; // apply escaped "null" if string is empty
$values[$key] = $val;
}
return (count($values) == 1) ? $values[0] : $values;
}
/**
* Undoes the conversion done by {@link escapeValue()}.
*
* Converts any sequences of a backslash followed by two hex digits into the corresponding character.
* @see Net_LDAP2_Util::escape_filter_value() from Benedikt Hallinger <beni@php.net>
* @link http://pear.php.net/package/Net_LDAP2
* @author Benedikt Hallinger <beni@php.net>
*
* @param string|array $values Array of values to escape
* @return array Array $values, but unescaped
*/
public static function unescapeValue($values = array())
{
/**
* @see Zend_Ldap_Converter
*/
require_once 'Zend/Ldap/Converter.php';
if (!is_array($values)) $values = array($values);
foreach ($values as $key => $value) {
// Translate hex code into ascii
$values[$key] = Zend_Ldap_Converter::hex32ToAsc($value);
}
return (count($values) == 1) ? $values[0] : $values;
}
}
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