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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Validator\Sitemap;
use Zend\Stdlib\ErrorHandler;
use Zend\Validator\AbstractValidator;
/**
* Validates whether a given value is valid as a sitemap <lastmod> value
*
* @link http://www.sitemaps.org/protocol.php Sitemaps XML format
*/
class Lastmod extends AbstractValidator
{
/**
* Regular expression to use when validating
*
*/
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])?$/';
/**
* Validation key for not valid
*
*/
const NOT_VALID = 'sitemapLastmodNotValid';
const INVALID = 'sitemapLastmodInvalid';
/**
* Validation failure message template definitions
*
* @var array
*/
protected $messageTemplates = array(
self::NOT_VALID => "The input is not a valid sitemap lastmod",
self::INVALID => "Invalid type given. String expected",
);
/**
* Validates if a string is valid as a sitemap lastmod
*
* @link http://www.sitemaps.org/protocol.php#lastmoddef <lastmod>
*
* @param string $value value to validate
* @return bool
*/
public function isValid($value)
{
if (!is_string($value)) {
$this->error(self::INVALID);
return false;
}
$this->setValue($value);
ErrorHandler::start();
$result = preg_match(self::LASTMOD_REGEX, $value);
ErrorHandler::stop();
if ($result != 1) {
$this->error(self::NOT_VALID);
return false;
}
return true;
}
}