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<?php
namespace Mautic\EmailBundle\Helper;
use Mautic\EmailBundle\EmailEvents;
use Mautic\EmailBundle\Event\EmailValidationEvent;
use Mautic\EmailBundle\Exception\InvalidEmailException;
use Symfony\Component\EventDispatcher\EventDispatcherInterface;
use Symfony\Contracts\Translation\TranslatorInterface;
class EmailValidator
{
public function __construct(
protected TranslatorInterface $translator,
protected EventDispatcherInterface $dispatcher
) {
}
/**
* Validate that an email is the correct format, doesn't have invalid characters, a MX record is associated with the domain, and
* leverage integrations to validate.
*
* @param bool $doDnsCheck
*
* @throws InvalidEmailException
*/
public function validate($address, $doDnsCheck = false): void
{
if (!$this->isValidFormat($address)) {
throw new InvalidEmailException($address, $this->translator->trans('mautic.email.address.invalid_format', ['%email%' => $address ?: '?']));
}
if ($this->hasValidCharacters($address)) {
throw new InvalidEmailException($address, $this->translator->trans('mautic.email.address.invalid_characters', ['%email%' => $address]));
}
if ($doDnsCheck && !$this->hasValidDomain($address)) {
throw new InvalidEmailException($address, $this->translator->trans('mautic.email.address.invalid_domain', ['%email%' => $address]));
}
$this->doPluginValidation($address);
}
/**
* Validates that email is in an acceptable format.
*
* @returns bool
*/
public function isValidFormat($address): bool
{
return !empty($address) && filter_var($address, FILTER_VALIDATE_EMAIL);
}
/**
* Validates that email does not have invalid characters.
*
* @returns bool
*/
public function hasValidCharacters($address)
{
$invalidChar = strpbrk($address, '^&*%');
return $invalidChar ? substr($invalidChar, 0, 1) : $invalidChar;
}
/**
* Validates if the domain of an email.
*
* @returns bool
*/
public function hasValidDomain($address): bool
{
[$user, $domain] = explode('@', $address);
return checkdnsrr($domain, 'MX');
}
/**
* Validate using 3rd party integrations.
*
* @throws InvalidEmailException
*/
public function doPluginValidation($address): void
{
$event = $this->dispatcher->dispatch(
new EmailValidationEvent($address),
EmailEvents::ON_EMAIL_VALIDATION
);
if (!$event->isValid()) {
throw new InvalidEmailException($address, $event->getInvalidReason());
}
}
}
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