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<?php
/**
* TEmailAddressValidator class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link https://github.com/pradosoft/prado
* @copyright Copyright © 2005-2016 The PRADO Group
* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
* @package System.Web.UI.WebControls
*/
/**
* Using TRegularExpressionValidator class
*/
Prado::using('System.Web.UI.WebControls.TRegularExpressionValidator');
/**
* TEmailAddressValidator class
*
* TEmailAddressValidator validates whether the value of an associated
* input component is a valid email address. If {@link getCheckMXRecord CheckMXRecord}
* is true, it will check MX record for the email adress, provided
* checkdnsrr() is available in the installed PHP.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package System.Web.UI.WebControls
* @since 3.0
*/
class TEmailAddressValidator extends TRegularExpressionValidator
{
/**
* Regular expression used to validate the email address
* @see http://www.regular-expressions.info/email.html
*/
const EMAIL_REGEXP='[a-zA-Z0-9!#$%&\'*+/=?^_`{|}~-]+(?:\.[a-zA-Z0-9!#$%&\'*+/=?^_`{|}~-]+)*@(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z0-9](?:[a-zA-Z0-9-]*[a-zA-Z0-9])?';
/**
* Gets the name of the javascript class responsible for performing validation for this control.
* This method overrides the parent implementation.
* @return string the javascript class name
*/
protected function getClientClassName()
{
return 'Prado.WebUI.TEmailAddressValidator';
}
/**
* @return string the regular expression that determines the pattern used to validate a field.
*/
public function getRegularExpression()
{
$regex=parent::getRegularExpression();
return $regex===''?self::EMAIL_REGEXP:$regex;
}
/**
* Returns an array of javascript validator options.
* @return array javascript validator options.
*/
public function evaluateIsValid()
{
$value=$this->getValidationValue($this->getValidationTarget());
$valid=$valid=is_string($value) && strlen($value)<=254 && parent::evaluateIsValid();
if($valid && $this->getCheckMXRecord() && function_exists('checkdnsrr'))
{
if($value!=='')
{
if(($pos=strpos($value,'@'))!==false)
{
$domain=substr($value,$pos+1);
return $domain===''?false:checkdnsrr($domain,'MX');
}
else
return false;
}
}
return $valid;
}
/**
* @return boolean whether to check MX record for the email address being validated. Defaults to true.
*/
public function getCheckMXRecord()
{
return $this->getViewState('CheckMXRecord',false);
}
/**
* @param boolean whether to check MX record for the email address being validated.
* Note, if {@link checkdnsrr} is not available, this check will not be performed.
*/
public function setCheckMXRecord($value)
{
$this->setViewState('CheckMXRecord',TPropertyValue::ensureBoolean($value),false);
}
}
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