www.aleph1.co.uk Git - yaffs-website/blob - vendor/symfony/validator/Constraints/EmailValidator.php

   1 <?php
   2
   3 /*
   4  * This file is part of the Symfony package.
   5  *
   6  * (c) Fabien Potencier <fabien@symfony.com>
   7  *
   8  * For the full copyright and license information, please view the LICENSE
   9  * file that was distributed with this source code.
  10  */
  11
  12 namespace Symfony\Component\Validator\Constraints;
  13
  14 use Egulias\EmailValidator\Validation\EmailValidation;
  15 use Egulias\EmailValidator\Validation\NoRFCWarningsValidation;
  16 use Symfony\Component\Validator\Constraint;
  17 use Symfony\Component\Validator\ConstraintValidator;
  18 use Symfony\Component\Validator\Exception\RuntimeException;
  19 use Symfony\Component\Validator\Exception\UnexpectedTypeException;
  20
  21 /**
  22  * @author Bernhard Schussek <bschussek@gmail.com>
  23  */
  24 class EmailValidator extends ConstraintValidator
  25 {
  26     /**
  27      * @var bool
  28      */
  29     private $isStrict;
  30
  31     public function __construct($strict = false)
  32     {
  33         $this->isStrict = $strict;
  34     }
  35
  36     /**
  37      * {@inheritdoc}
  38      */
  39     public function validate($value, Constraint $constraint)
  40     {
  41         if (!$constraint instanceof Email) {
  42             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Email');
  43         }
  44
  45         if (null === $value || '' === $value) {
  46             return;
  47         }
  48
  49         if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
  50             throw new UnexpectedTypeException($value, 'string');
  51         }
  52
  53         $value = (string) $value;
  54
  55         if (null === $constraint->strict) {
  56             $constraint->strict = $this->isStrict;
  57         }
  58
  59         if ($constraint->strict) {
  60             if (!class_exists('\Egulias\EmailValidator\EmailValidator')) {
  61                 throw new RuntimeException('Strict email validation requires egulias/email-validator ~1.2|~2.0');
  62             }
  63
  64             $strictValidator = new \Egulias\EmailValidator\EmailValidator();
  65
  66             if (interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, new NoRFCWarningsValidation())) {
  67                 $this->context->buildViolation($constraint->message)
  68                     ->setParameter('{{ value }}', $this->formatValue($value))
  69                     ->setCode(Email::INVALID_FORMAT_ERROR)
  70                     ->addViolation();
  71
  72                 return;
  73             } elseif (!interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, false, true)) {
  74                 $this->context->buildViolation($constraint->message)
  75                     ->setParameter('{{ value }}', $this->formatValue($value))
  76                     ->setCode(Email::INVALID_FORMAT_ERROR)
  77                     ->addViolation();
  78
  79                 return;
  80             }
  81         } elseif (!preg_match('/^.+\@\S+\.\S+$/', $value)) {
  82             $this->context->buildViolation($constraint->message)
  83                 ->setParameter('{{ value }}', $this->formatValue($value))
  84                 ->setCode(Email::INVALID_FORMAT_ERROR)
  85                 ->addViolation();
  86
  87             return;
  88         }
  89
  90         $host = (string) substr($value, strrpos($value, '@') + 1);
  91
  92         // Check for host DNS resource records
  93         if ($constraint->checkMX) {
  94             if (!$this->checkMX($host)) {
  95                 $this->context->buildViolation($constraint->message)
  96                     ->setParameter('{{ value }}', $this->formatValue($value))
  97                     ->setCode(Email::MX_CHECK_FAILED_ERROR)
  98                     ->addViolation();
  99             }
 100
 101             return;
 102         }
 103
 104         if ($constraint->checkHost && !$this->checkHost($host)) {
 105             $this->context->buildViolation($constraint->message)
 106                 ->setParameter('{{ value }}', $this->formatValue($value))
 107                 ->setCode(Email::HOST_CHECK_FAILED_ERROR)
 108                 ->addViolation();
 109         }
 110     }
 111
 112     /**
 113      * Check DNS Records for MX type.
 114      *
 115      * @param string $host Host
 116      *
 117      * @return bool
 118      */
 119     private function checkMX($host)
 120     {
 121         return '' !== $host && checkdnsrr($host, 'MX');
 122     }
 123
 124     /**
 125      * Check if one of MX, A or AAAA DNS RR exists.
 126      *
 127      * @param string $host Host
 128      *
 129      * @return bool
 130      */
 131     private function checkHost($host)
 132     {
 133         return '' !== $host && ($this->checkMX($host) || (checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA')));
 134     }
 135 }