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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* 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 Egulias\EmailValidator\Validation\EmailValidation;
use Egulias\EmailValidator\Validation\NoRFCWarningsValidation;
use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\LogicException;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;
use Symfony\Component\Validator\Exception\UnexpectedValueException;
/**
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class EmailValidator extends ConstraintValidator
{
/**
* @internal
*/
const PATTERN_HTML5 = '/^[a-zA-Z0-9.!#$%&\'*+\\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+$/';
/**
* @internal
*/
const PATTERN_LOOSE = '/^.+\@\S+\.\S+$/';
private static $emailPatterns = [
Email::VALIDATION_MODE_LOOSE => self::PATTERN_LOOSE,
Email::VALIDATION_MODE_HTML5 => self::PATTERN_HTML5,
];
/**
* @var string
*/
private $defaultMode;
/**
* @param string $defaultMode
*/
public function __construct($defaultMode = Email::VALIDATION_MODE_LOOSE)
{
if (\is_bool($defaultMode)) {
@trigger_error(sprintf('Calling `new %s(%s)` is deprecated since Symfony 4.1, use `new %s("%s")` instead.', self::class, $defaultMode ? 'true' : 'false', self::class, $defaultMode ? Email::VALIDATION_MODE_STRICT : Email::VALIDATION_MODE_LOOSE), E_USER_DEPRECATED);
$defaultMode = $defaultMode ? Email::VALIDATION_MODE_STRICT : Email::VALIDATION_MODE_LOOSE;
}
if (!\in_array($defaultMode, Email::$validationModes, true)) {
throw new \InvalidArgumentException('The "defaultMode" parameter value is not valid.');
}
$this->defaultMode = $defaultMode;
}
/**
* {@inheritdoc}
*/
public function validate($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 UnexpectedValueException($value, 'string');
}
$value = (string) $value;
if (null !== $constraint->normalizer) {
$value = ($constraint->normalizer)($value);
}
if (null !== $constraint->strict) {
@trigger_error(sprintf('The %s::$strict property is deprecated since Symfony 4.1. Use %s::mode="%s" instead.', Email::class, Email::class, Email::VALIDATION_MODE_STRICT), E_USER_DEPRECATED);
if ($constraint->strict) {
$constraint->mode = Email::VALIDATION_MODE_STRICT;
} else {
$constraint->mode = Email::VALIDATION_MODE_LOOSE;
}
}
if (null === $constraint->mode) {
$constraint->mode = $this->defaultMode;
}
if (!\in_array($constraint->mode, Email::$validationModes, true)) {
throw new \InvalidArgumentException(sprintf('The %s::$mode parameter value is not valid.', \get_class($constraint)));
}
if (Email::VALIDATION_MODE_STRICT === $constraint->mode) {
if (!class_exists('\Egulias\EmailValidator\EmailValidator')) {
throw new LogicException('Strict email validation requires egulias/email-validator ~1.2|~2.0');
}
$strictValidator = new \Egulias\EmailValidator\EmailValidator();
if (interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, new NoRFCWarningsValidation())) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::INVALID_FORMAT_ERROR)
->addViolation();
return;
} elseif (!interface_exists(EmailValidation::class) && !$strictValidator->isValid($value, false, true)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::INVALID_FORMAT_ERROR)
->addViolation();
return;
}
} elseif (!preg_match(self::$emailPatterns[$constraint->mode], $value)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::INVALID_FORMAT_ERROR)
->addViolation();
return;
}
$host = (string) substr($value, strrpos($value, '@') + 1);
// Check for host DNS resource records
if ($constraint->checkMX) {
if (!$this->checkMX($host)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::MX_CHECK_FAILED_ERROR)
->addViolation();
}
return;
}
if ($constraint->checkHost && !$this->checkHost($host)) {
$this->context->buildViolation($constraint->message)
->setParameter('{{ value }}', $this->formatValue($value))
->setCode(Email::HOST_CHECK_FAILED_ERROR)
->addViolation();
}
}
/**
* Check DNS Records for MX type.
*/
private function checkMX(string $host): bool
{
return '' !== $host && checkdnsrr($host, 'MX');
}
/**
* Check if one of MX, A or AAAA DNS RR exists.
*/
private function checkHost(string $host): bool
{
return '' !== $host && ($this->checkMX($host) || (checkdnsrr($host, 'A') || checkdnsrr($host, 'AAAA')));
}
}
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