Chris@0: <?php
Chris@0: 
Chris@0: /*
Chris@0:  * This file is part of the Symfony package.
Chris@0:  *
Chris@0:  * (c) Fabien Potencier <fabien@symfony.com>
Chris@0:  *
Chris@0:  * For the full copyright and license information, please view the LICENSE
Chris@0:  * file that was distributed with this source code.
Chris@0:  */
Chris@0: 
Chris@0: namespace Symfony\Component\Validator\Constraints;
Chris@0: 
Chris@0: use Egulias\EmailValidator\Validation\EmailValidation;
Chris@0: use Egulias\EmailValidator\Validation\NoRFCWarningsValidation;
Chris@0: use Symfony\Component\Validator\Constraint;
Chris@0: use Symfony\Component\Validator\ConstraintValidator;
Chris@0: use Symfony\Component\Validator\Exception\RuntimeException;
Chris@0: use Symfony\Component\Validator\Exception\UnexpectedTypeException;
Chris@0: 
Chris@0: /**
Chris@0:  * @author Bernhard Schussek <bschussek@gmail.com>
Chris@0:  */
Chris@0: class EmailValidator extends ConstraintValidator
Chris@0: {
Chris@0:     private $isStrict;
Chris@0: 
Chris@14:     /**
Chris@14:      * @param bool $strict
Chris@14:      */
Chris@0:     public function __construct($strict = false)
Chris@0:     {
Chris@0:         $this->isStrict = $strict;
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * {@inheritdoc}
Chris@0:      */
Chris@0:     public function validate($value, Constraint $constraint)
Chris@0:     {
Chris@0:         if (!$constraint instanceof Email) {
Chris@0:             throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Email');
Chris@0:         }
Chris@0: 
Chris@0:         if (null === $value || '' === $value) {
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@17:         if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
Chris@0:             throw new UnexpectedTypeException($value, 'string');
Chris@0:         }
Chris@0: 
Chris@0:         $value = (string) $value;
Chris@0: 
Chris@0:         if (null === $constraint->strict) {
Chris@0:             $constraint->strict = $this->isStrict;
Chris@0:         }
Chris@0: 
Chris@0:         if ($constraint->strict) {
Chris@0:             if (!class_exists('\Egulias\EmailValidator\EmailValidator')) {
Chris@0:                 throw new RuntimeException('Strict email validation requires egulias/email-validator ~1.2|~2.0');
Chris@0:             }
Chris@0: 
Chris@0:             $strictValidator = new \Egulias\EmailValidator\EmailValidator();
Chris@0: 
Chris@0:             if (interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, new NoRFCWarningsValidation())) {
Chris@0:                 $this->context->buildViolation($constraint->message)
Chris@0:                     ->setParameter('{{ value }}', $this->formatValue($value))
Chris@0:                     ->setCode(Email::INVALID_FORMAT_ERROR)
Chris@0:                     ->addViolation();
Chris@0: 
Chris@0:                 return;
Chris@0:             } elseif (!interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, false, true)) {
Chris@0:                 $this->context->buildViolation($constraint->message)
Chris@0:                     ->setParameter('{{ value }}', $this->formatValue($value))
Chris@0:                     ->setCode(Email::INVALID_FORMAT_ERROR)
Chris@0:                     ->addViolation();
Chris@0: 
Chris@0:                 return;
Chris@0:             }
Chris@0:         } elseif (!preg_match('/^.+\@\S+\.\S+$/', $value)) {
Chris@0:             $this->context->buildViolation($constraint->message)
Chris@0:                 ->setParameter('{{ value }}', $this->formatValue($value))
Chris@0:                 ->setCode(Email::INVALID_FORMAT_ERROR)
Chris@0:                 ->addViolation();
Chris@0: 
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         $host = (string) substr($value, strrpos($value, '@') + 1);
Chris@0: 
Chris@0:         // Check for host DNS resource records
Chris@0:         if ($constraint->checkMX) {
Chris@0:             if (!$this->checkMX($host)) {
Chris@0:                 $this->context->buildViolation($constraint->message)
Chris@0:                     ->setParameter('{{ value }}', $this->formatValue($value))
Chris@0:                     ->setCode(Email::MX_CHECK_FAILED_ERROR)
Chris@0:                     ->addViolation();
Chris@0:             }
Chris@0: 
Chris@0:             return;
Chris@0:         }
Chris@0: 
Chris@0:         if ($constraint->checkHost && !$this->checkHost($host)) {
Chris@0:             $this->context->buildViolation($constraint->message)
Chris@0:                 ->setParameter('{{ value }}', $this->formatValue($value))
Chris@0:                 ->setCode(Email::HOST_CHECK_FAILED_ERROR)
Chris@0:                 ->addViolation();
Chris@0:         }
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Check DNS Records for MX type.
Chris@0:      *
Chris@0:      * @param string $host Host
Chris@0:      *
Chris@0:      * @return bool
Chris@0:      */
Chris@0:     private function checkMX($host)
Chris@0:     {
Chris@0:         return '' !== $host && checkdnsrr($host, 'MX');
Chris@0:     }
Chris@0: 
Chris@0:     /**
Chris@0:      * Check if one of MX, A or AAAA DNS RR exists.
Chris@0:      *
Chris@0:      * @param string $host Host
Chris@0:      *
Chris@0:      * @return bool
Chris@0:      */
Chris@0:     private function checkHost($host)
Chris@0:     {
Chris@0:         return '' !== $host && ($this->checkMX($host) || (checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA')));
Chris@0:     }
Chris@0: }