N°8771 - Add Symfony form component to iTop core (#760)

- Add Symfony Form Component
- Add Symfony CSRF security component
- Add iTop default form template
- Add Twig debug extension to Twig Environment
- Add iTop abstract controller facility to get form builder
- Add Twig filter to make trans an alias of dict_s filter

lib/symfony/security-csrf/CsrfTokenManagerInterface.php

@@ -0,0 +1,57 @@
+<?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\Security\Csrf;
+
+/**
+ * Manages CSRF tokens.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+interface CsrfTokenManagerInterface
+{
+    /**
+     * Returns a CSRF token for the given ID.
+     *
+     * If previously no token existed for the given ID, a new token is
+     * generated. Otherwise the existing token is returned (with the same value,
+     * not the same instance).
+     *
+     * @param string $tokenId The token ID. You may choose an arbitrary value
+     *                        for the ID
+     */
+    public function getToken(string $tokenId): CsrfToken;
+
+    /**
+     * Generates a new token value for the given ID.
+     *
+     * This method will generate a new token for the given token ID, independent
+     * of whether a token value previously existed or not. It can be used to
+     * enforce once-only tokens in environments with high security needs.
+     *
+     * @param string $tokenId The token ID. You may choose an arbitrary value
+     *                        for the ID
+     */
+    public function refreshToken(string $tokenId): CsrfToken;
+
+    /**
+     * Invalidates the CSRF token with the given ID, if one exists.
+     *
+     * @return string|null Returns the removed token value if one existed, NULL
+     *                     otherwise
+     */
+    public function removeToken(string $tokenId): ?string;
+
+    /**
+     * Returns whether the given CSRF token is valid.
+     */
+    public function isTokenValid(CsrfToken $token): bool;
+}