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/Extension/Validator/ValidatorExtension.php

@@ -0,0 +1,68 @@
+<?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\Validator;
+
+use Symfony\Component\Form\AbstractExtension;
+use Symfony\Component\Form\Extension\Validator\Constraints\Form;
+use Symfony\Component\Form\FormRendererInterface;
+use Symfony\Component\Form\FormTypeGuesserInterface;
+use Symfony\Component\Validator\Constraints\Traverse;
+use Symfony\Component\Validator\Mapping\ClassMetadata;
+use Symfony\Component\Validator\Validator\ValidatorInterface;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+/**
+ * Extension supporting the Symfony Validator component in forms.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+class ValidatorExtension extends AbstractExtension
+{
+    private ValidatorInterface $validator;
+    private ?FormRendererInterface $formRenderer;
+    private ?TranslatorInterface $translator;
+    private bool $legacyErrorMessages;
+
+    public function __construct(ValidatorInterface $validator, bool $legacyErrorMessages = true, ?FormRendererInterface $formRenderer = null, ?TranslatorInterface $translator = null)
+    {
+        $this->legacyErrorMessages = $legacyErrorMessages;
+
+        /** @var ClassMetadata $metadata */
+        $metadata = $validator->getMetadataFor(\Symfony\Component\Form\Form::class);
+
+        // Register the form constraints in the validator programmatically.
+        // This functionality is required when using the Form component without
+        // the DIC, where the XML file is loaded automatically. Thus the following
+        // code must be kept synchronized with validation.xml
+
+        $metadata->addConstraint(new Form());
+        $metadata->addConstraint(new Traverse(false));
+
+        $this->validator = $validator;
+        $this->formRenderer = $formRenderer;
+        $this->translator = $translator;
+    }
+
+    public function loadTypeGuesser(): ?FormTypeGuesserInterface
+    {
+        return new ValidatorTypeGuesser($this->validator);
+    }
+
+    protected function loadTypeExtensions(): array
+    {
+        return [
+            new Type\FormTypeValidatorExtension($this->validator, $this->legacyErrorMessages, $this->formRenderer, $this->translator),
+            new Type\RepeatedTypeValidatorExtension(),
+            new Type\SubmitTypeValidatorExtension(),
+        ];
+    }
+}