interface/modules/zend_modules/library/Zend/Validator/Sitemap/Lastmod.php

   1 <?php
   2 /**
   3  * Zend Framework (http://framework.zend.com/)
   4  *
   5  * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6  * @copyright Copyright (c) 2005-2013 Zend Technologies USA Inc. (http://www.zend.com)
   7  * @license   http://framework.zend.com/license/new-bsd New BSD License
   8  */
   9
  10 namespace Zend\Validator\Sitemap;
  11
  12 use Zend\Stdlib\ErrorHandler;
  13 use Zend\Validator\AbstractValidator;
  14
  15 /**
  16  * Validates whether a given value is valid as a sitemap <lastmod> value
  17  *
  18  * @link       http://www.sitemaps.org/protocol.php Sitemaps XML format
  19  */
  20 class Lastmod extends AbstractValidator
  21 {
  22     /**
  23      * Regular expression to use when validating
  24      *
  25      */
  26     const LASTMOD_REGEX = '/^[0-9]{4}-(0[1-9]|1[0-2])-(0[1-9]|[1-2][0-9]|3[0-1])(T([0-1][0-9]|2[0-3])(:[0-5][0-9])(:[0-5][0-9])?(\\+|-)([0-1][0-9]|2[0-3]):[0-5][0-9])?$/';
  27
  28     /**
  29      * Validation key for not valid
  30      *
  31      */
  32     const NOT_VALID = 'sitemapLastmodNotValid';
  33     const INVALID   = 'sitemapLastmodInvalid';
  34
  35     /**
  36      * Validation failure message template definitions
  37      *
  38      * @var array
  39      */
  40     protected $messageTemplates = array(
  41         self::NOT_VALID => "The input is not a valid sitemap lastmod",
  42         self::INVALID   => "Invalid type given. String expected",
  43     );
  44
  45     /**
  46      * Validates if a string is valid as a sitemap lastmod
  47      *
  48      * @link http://www.sitemaps.org/protocol.php#lastmoddef <lastmod>
  49      *
  50      * @param  string  $value  value to validate
  51      * @return bool
  52      */
  53     public function isValid($value)
  54     {
  55         if (!is_string($value)) {
  56             $this->error(self::INVALID);
  57             return false;
  58         }
  59
  60         $this->setValue($value);
  61         ErrorHandler::start();
  62         $result = preg_match(self::LASTMOD_REGEX, $value);
  63         ErrorHandler::stop();
  64         if ($result != 1) {
  65             $this->error(self::NOT_VALID);
  66             return false;
  67         }
  68
  69         return true;
  70     }
  71 }