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   1  <?php
   2  /**
   3   * TEmailAddressValidator class file
   4   *
   5   * @author Qiang Xue <qiang.xue@gmail.com>
   6   * @link http://www.pradosoft.com/
   7   * @copyright Copyright &copy; 2005 PradoSoft
   8   * @license http://www.pradosoft.com/license/
   9   * @version $Id: TEmailAddressValidator.php 1397 2006-09-07 07:55:53Z wei $
  10   * @package System.Web.UI.WebControls
  11   */
  12  
  13  /**
  14   * Using TRegularExpressionValidator class
  15   */
  16  Prado::using('System.Web.UI.WebControls.TRegularExpressionValidator');
  17  
  18  /**
  19   * TEmailAddressValidator class
  20   *
  21   * TEmailAddressValidator validates whether the value of an associated
  22   * input component is a valid email address. If {@link getCheckMXRecord CheckMXRecord}
  23   * is true, it will check MX record for the email adress, provided
  24   * checkdnsrr() is available in the installed PHP.
  25   *
  26   * @author Qiang Xue <qiang.xue@gmail.com>
  27   * @version $Id: TEmailAddressValidator.php 1397 2006-09-07 07:55:53Z wei $
  28   * @package System.Web.UI.WebControls
  29   * @since 3.0
  30   */
  31  class TEmailAddressValidator extends TRegularExpressionValidator
  32  {
  33      /**
  34       * Regular expression used to validate the email address
  35       */
  36      const EMAIL_REGEXP="\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*";
  37  
  38      /**
  39       * Gets the name of the javascript class responsible for performing validation for this control.
  40       * This method overrides the parent implementation.
  41       * @return string the javascript class name
  42       */
  43  	protected function getClientClassName()
  44      {
  45          return 'Prado.WebUI.TEmailAddressValidator';
  46      }
  47  
  48      /**
  49       * @return string the regular expression that determines the pattern used to validate a field.
  50       */
  51  	public function getRegularExpression()
  52      {
  53          $regex=parent::getRegularExpression();
  54          return $regex===''?self::EMAIL_REGEXP:$regex;
  55      }
  56  
  57      /**
  58       * Returns an array of javascript validator options.
  59       * @return array javascript validator options.
  60       */
  61  	public function evaluateIsValid()
  62      {
  63          $valid=parent::evaluateIsValid();
  64          if($valid && $this->getCheckMXRecord() && function_exists('checkdnsrr'))
  65          {
  66              if(($value=$this->getValidationValue($this->getValidationTarget()))!=='')
  67              {
  68                  if(($pos=strpos($value,'@'))!==false)
  69                  {
  70                      $domain=substr($value,$pos+1);
  71                      return $domain===''?false:checkdnsrr($domain,'MX');
  72                  }
  73                  else
  74                      return false;
  75              }
  76          }
  77          return $valid;
  78      }
  79  
  80      /**
  81       * @return boolean whether to check MX record for the email address being validated. Defaults to true.
  82       */
  83  	public function getCheckMXRecord()
  84      {
  85          return $this->getViewState('CheckMXRecord',true);
  86      }
  87  
  88      /**
  89       * @param boolean whether to check MX record for the email address being validated.
  90       * Note, if {@link checkdnsrr} is not available, this check will not be performed.
  91       */
  92  	public function setCheckMXRecord($value)
  93      {
  94          $this->setViewState('CheckMXRecord',TPropertyValue::ensureBoolean($value),true);
  95      }
  96  }
  97  
  98  ?>