EmailValidator.php in Plug 7

Namespace

Symfony\Component\Validator\Constraints

File

lib/Symfony/validator/Symfony/Component/Validator/Constraints/EmailValidator.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <[e-mail]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace Symfony\Component\Validator\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\RuntimeException;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;

/**
 * @author Bernhard Schussek <[e-mail]>
 *
 * @api
 */
class EmailValidator extends ConstraintValidator {

  /**
   * @var bool
   */
  private $isStrict;
  public function __construct($strict = false) {
    $this->isStrict = $strict;
  }

  /**
   * {@inheritdoc}
   */
  public function validate($value, Constraint $constraint) {
    if (!$constraint instanceof Email) {
      throw new UnexpectedTypeException($constraint, __NAMESPACE__ . '\\Email');
    }
    if (null === $value || '' === $value) {
      return;
    }
    if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
      throw new UnexpectedTypeException($value, 'string');
    }
    $value = (string) $value;
    if (null === $constraint->strict) {
      $constraint->strict = $this->isStrict;
    }
    if ($constraint->strict) {
      if (!class_exists('\\Egulias\\EmailValidator\\EmailValidator')) {
        throw new RuntimeException('Strict email validation requires egulias/email-validator');
      }
      $strictValidator = new \Egulias\EmailValidator\EmailValidator();
      if (!$strictValidator
        ->isValid($value, false, true)) {
        $this
          ->buildViolation($constraint->message)
          ->setParameter('{{ value }}', $this
          ->formatValue($value))
          ->setCode(Email::INVALID_FORMAT_ERROR)
          ->addViolation();
        return;
      }
    }
    elseif (!preg_match('/^.+\\@\\S+\\.\\S+$/', $value)) {
      $this
        ->buildViolation($constraint->message)
        ->setParameter('{{ value }}', $this
        ->formatValue($value))
        ->setCode(Email::INVALID_FORMAT_ERROR)
        ->addViolation();
      return;
    }
    $host = substr($value, strpos($value, '@') + 1);

    // Check for host DNS resource records
    if ($constraint->checkMX) {
      if (!$this
        ->checkMX($host)) {
        $this
          ->buildViolation($constraint->message)
          ->setParameter('{{ value }}', $this
          ->formatValue($value))
          ->setCode(Email::MX_CHECK_FAILED_ERROR)
          ->addViolation();
      }
      return;
    }
    if ($constraint->checkHost && !$this
      ->checkHost($host)) {
      $this
        ->buildViolation($constraint->message)
        ->setParameter('{{ value }}', $this
        ->formatValue($value))
        ->setCode(Email::HOST_CHECK_FAILED_ERROR)
        ->addViolation();
    }
  }

  /**
   * Check DNS Records for MX type.
   *
   * @param string $host Host
   *
   * @return bool
   */
  private function checkMX($host) {
    return checkdnsrr($host, 'MX');
  }

  /**
   * Check if one of MX, A or AAAA DNS RR exists.
   *
   * @param string $host Host
   *
   * @return bool
   */
  private function checkHost($host) {
    return $this
      ->checkMX($host) || (checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA'));
  }

}

Classes

Name	Description
EmailValidator	@author Bernhard Schussek <[e-mail]>