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Editing: CsrfValidationListener.php

<?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\Form\Extension\Csrf\EventListener;

use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\Form\Exception\UnexpectedTypeException;
use Symfony\Component\Form\Extension\Csrf\CsrfProvider\CsrfProviderAdapter;
use Symfony\Component\Form\Extension\Csrf\CsrfProvider\CsrfProviderInterface;
use Symfony\Component\Form\FormEvents;
use Symfony\Component\Form\FormError;
use Symfony\Component\Form\FormEvent;
use Symfony\Component\Security\Csrf\CsrfToken;
use Symfony\Component\Security\Csrf\CsrfTokenManagerInterface;
use Symfony\Component\Translation\TranslatorInterface;

/**
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class CsrfValidationListener implements EventSubscriberInterface
{
    /**
     * The name of the CSRF field
     * @var string
     */
    private $fieldName;

/**
     * The generator for CSRF tokens
     * @var CsrfTokenManagerInterface
     */
    private $tokenManager;

/**
     * A text mentioning the tokenId of the CSRF token
     *
     * Validation of the token will only succeed if it was generated in the
     * same session and with the same tokenId.
     *
     * @var string
     */
    private $tokenId;

/**
     * The message displayed in case of an error.
     * @var string
     */
    private $errorMessage;

/**
     * @var TranslatorInterface
     */
    private $translator;

/**
     * @var null|string
     */
    private $translationDomain;

public static function getSubscribedEvents()
    {
        return array(
            FormEvents::PRE_SUBMIT => 'preSubmit',
        );
    }

public function __construct($fieldName, $tokenManager, $tokenId, $errorMessage, TranslatorInterface $translator = null, $translationDomain = null)
    {
        if ($tokenManager instanceof CsrfProviderInterface) {
            $tokenManager = new CsrfProviderAdapter($tokenManager);
        } elseif (!$tokenManager instanceof CsrfTokenManagerInterface) {
            throw new UnexpectedTypeException($tokenManager, 'CsrfProviderInterface or CsrfTokenManagerInterface');
        }

$this->fieldName = $fieldName;
        $this->tokenManager = $tokenManager;
        $this->tokenId = $tokenId;
        $this->errorMessage = $errorMessage;
        $this->translator = $translator;
        $this->translationDomain = $translationDomain;
    }

public function preSubmit(FormEvent $event)
    {
        $form = $event->getForm();
        $data = $event->getData();

if ($form->isRoot() && $form->getConfig()->getOption('compound')) {
            if (!isset($data[$this->fieldName]) || !$this->tokenManager->isTokenValid(new CsrfToken($this->tokenId, $data[$this->fieldName]))) {
                $errorMessage = $this->errorMessage;

if (null !== $this->translator) {
                    $errorMessage = $this->translator->trans($errorMessage, array(), $this->translationDomain);
                }

$form->addError(new FormError($errorMessage));
            }

if (is_array($data)) {
                unset($data[$this->fieldName]);
            }
        }

$event->setData($data);
    }

/**
     * Alias of {@link preSubmit()}.
     *
     * @deprecated Deprecated since version 2.3, to be removed in 3.0. Use
     *             {@link preSubmit()} instead.
     */
    public function preBind(FormEvent $event)
    {
        $this->preSubmit($event);
    }
}

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