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   1  <?php
   2  /**
   3   * Zend Framework
   4   *
   5   * LICENSE
   6   *
   7   * This source file is subject to the new BSD license that is bundled
   8   * with this package in the file LICENSE.txt.
   9   * It is also available through the world-wide-web at this URL:
  10   * http://framework.zend.com/license/new-bsd
  11   * If you did not receive a copy of the license and are unable to
  12   * obtain it through the world-wide-web, please send an email
  13   * to [email protected] so we can send you a copy immediately.
  14   *
  15   * @category   Zend
  16   * @package    Zend_Validate
  17   * @subpackage Sitemap
  18   * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  19   * @license    http://framework.zend.com/license/new-bsd     New BSD License
  20   * @version    $Id$
  21   */
  22  
  23  /**
  24   * @see Zend_Validate_Abstract
  25   */
  26  require_once 'Zend/Validate/Abstract.php';
  27  
  28  /**
  29   * Validates whether a given value is valid as a sitemap <priority> value
  30   *
  31   * @link       http://www.sitemaps.org/protocol.php Sitemaps XML format
  32   *
  33   * @category   Zend
  34   * @package    Zend_Validate
  35   * @subpackage Sitemap
  36   * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)
  37   * @license    http://framework.zend.com/license/new-bsd     New BSD License
  38   */
  39  class Zend_Validate_Sitemap_Priority extends Zend_Validate_Abstract
  40  {
  41      /**
  42       * Validation key for not valid
  43       *
  44       */
  45      const NOT_VALID = 'sitemapPriorityNotValid';
  46      const INVALID   = 'sitemapPriorityInvalid';
  47  
  48      /**
  49       * Validation failure message template definitions
  50       *
  51       * @var array
  52       */
  53      protected $_messageTemplates = array(
  54          self::NOT_VALID => "'%value%' is no valid sitemap priority",
  55          self::INVALID   => "Invalid type given, the value should be a integer, a float or a numeric string",
  56      );
  57  
  58      /**
  59       * Validates if a string is valid as a sitemap priority
  60       *
  61       * @link http://www.sitemaps.org/protocol.php#prioritydef <priority>
  62       *
  63       * @param  string  $value  value to validate
  64       * @return boolean
  65       */
  66      public function isValid($value)
  67      {
  68          if (!is_numeric($value)) {
  69              $this->_error(self::INVALID);
  70              return false;
  71          }
  72  
  73          $this->_setValue($value);
  74          $value = (float) $value;
  75          if ($value < 0 || $value > 1) {
  76              $this->_error(self::NOT_VALID);
  77              return false;
  78          }
  79  
  80          return true;
  81      }
  82  }