interface/modules/zend_modules/library/Zend/Validator/Sitemap/Priority.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\Validator\AbstractValidator;
  13
  14 /**
  15  * Validates whether a given value is valid as a sitemap <priority> value
  16  *
  17  * @link       http://www.sitemaps.org/protocol.php Sitemaps XML format
  18  */
  19 class Priority extends AbstractValidator
  20 {
  21     /**
  22      * Validation key for not valid
  23      *
  24      */
  25     const NOT_VALID = 'sitemapPriorityNotValid';
  26     const INVALID   = 'sitemapPriorityInvalid';
  27
  28     /**
  29      * Validation failure message template definitions
  30      *
  31      * @var array
  32      */
  33     protected $messageTemplates = array(
  34         self::NOT_VALID => "The input is not a valid sitemap priority",
  35         self::INVALID   => "Invalid type given. Numeric string, integer or float expected",
  36     );
  37
  38     /**
  39      * Validates if a string is valid as a sitemap priority
  40      *
  41      * @link http://www.sitemaps.org/protocol.php#prioritydef <priority>
  42      *
  43      * @param  string  $value  value to validate
  44      * @return bool
  45      */
  46     public function isValid($value)
  47     {
  48         if (!is_numeric($value)) {
  49             $this->error(self::INVALID);
  50             return false;
  51         }
  52
  53         $this->setValue($value);
  54         $value = (float) $value;
  55         if ($value < 0 || $value > 1) {
  56             $this->error(self::NOT_VALID);
  57             return false;
  58         }
  59
  60         return true;
  61     }
  62 }