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/form/Util/ServerParams.php

@@ -0,0 +1,93 @@
+<?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\Util;
+
+use Symfony\Component\HttpFoundation\RequestStack;
+
+/**
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class ServerParams
+{
+    private ?RequestStack $requestStack;
+
+    public function __construct(?RequestStack $requestStack = null)
+    {
+        $this->requestStack = $requestStack;
+    }
+
+    /**
+     * Returns true if the POST max size has been exceeded in the request.
+     */
+    public function hasPostMaxSizeBeenExceeded(): bool
+    {
+        $contentLength = $this->getContentLength();
+        $maxContentLength = $this->getPostMaxSize();
+
+        return $maxContentLength && $contentLength > $maxContentLength;
+    }
+
+    /**
+     * Returns maximum post size in bytes.
+     */
+    public function getPostMaxSize(): int|float|null
+    {
+        $iniMax = strtolower($this->getNormalizedIniPostMaxSize());
+
+        if ('' === $iniMax) {
+            return null;
+        }
+
+        $max = ltrim($iniMax, '+');
+        if (str_starts_with($max, '0x')) {
+            $max = \intval($max, 16);
+        } elseif (str_starts_with($max, '0')) {
+            $max = \intval($max, 8);
+        } else {
+            $max = (int) $max;
+        }
+
+        switch (substr($iniMax, -1)) {
+            case 't': $max *= 1024;
+                // no break
+            case 'g': $max *= 1024;
+                // no break
+            case 'm': $max *= 1024;
+                // no break
+            case 'k': $max *= 1024;
+        }
+
+        return $max;
+    }
+
+    /**
+     * Returns the normalized "post_max_size" ini setting.
+     */
+    public function getNormalizedIniPostMaxSize(): string
+    {
+        return strtoupper(trim(\ini_get('post_max_size')));
+    }
+
+    /**
+     * Returns the content length of the request.
+     */
+    public function getContentLength(): mixed
+    {
+        if (null !== $this->requestStack && null !== $request = $this->requestStack->getCurrentRequest()) {
+            return $request->server->get('CONTENT_LENGTH');
+        }
+
+        return isset($_SERVER['CONTENT_LENGTH'])
+            ? (int) $_SERVER['CONTENT_LENGTH']
+            : null;
+    }
+}