Location: PHPKode > projects > DIY Blog > diy-blog/lib/propel/runtime-php4/classes/propel/validator/MaskValidator.php
<?php
/*
 *  $Id: MaskValidator.php 536 2007-01-10 14:30:38Z heltem $
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information please see
 * <http://propel.phpdb.org>.
 */

require_once 'propel/validator/BasicValidator.php';

/**
 * A validator for regular expressions.
 *
 * Below is an example usage for your Propel xml schema file.
 *
 * <code>
 *   <column name="username" type="VARCHAR" size="25" required="true" />
 *
 *   <validator column="username">
 *     <!-- allow only letters and underscore -->
 *     <rule name="mask" value="/^[\w_]+/" message="Username contains invalid characters !" />
 *   </validator>
 * </code>
 *
 * @author     Michael Aichler <hide@address.com>
 * @author     Hans Lellelid <hide@address.com>
 * @version    $Revision: 536 $
 * @package    propel.validator
 */
class MaskValidator extends BasicValidator
{

  /**
  * Prepares the regular expression entered in the XML
  * for use with preg_match().
  *
  * @param      string $exp
  * @return     string Prepared regular expession.
  */
  function prepareRegexp($exp)
  {
	// remove surrounding '/' marks so that they don't get escaped in next step
	if ($exp{0} !== '/' || $exp{strlen($exp)-1} !== '/' ) {
	  $exp = '/' . $exp . '/';
	}

	// if they did not escape / chars; we do that for them
	$exp = preg_replace('/([^\\\])\/([^$])/', '$1\/$2', $exp);
	return $exp;
  }

  /**
  * Whether the passed string matches regular expression.
  */
  function isValid (&$map, $str)
  {
	return (preg_match($this->prepareRegexp($map->getValue()), $str) != 0);
  }

}
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