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vendor/symfony/form/Extension/HtmlSanitizer/HtmlSanitizerExtension.php

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+<?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\HtmlSanitizer;
+
+use Psr\Container\ContainerInterface;
+use Symfony\Component\Form\AbstractExtension;
+
+/**
+ * Integrates the HtmlSanitizer component with the Form library.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class HtmlSanitizerExtension extends AbstractExtension
+{
+    public function __construct(
+        private ContainerInterface $sanitizers,
+        private string $defaultSanitizer = 'default',
+    ) {
+    }
+
+    protected function loadTypeExtensions(): array
+    {
+        return [
+            new Type\TextTypeHtmlSanitizerExtension($this->sanitizers, $this->defaultSanitizer),
+        ];
+    }
+}

vendor/symfony/form/Extension/HtmlSanitizer/Type/TextTypeHtmlSanitizerExtension.php

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+<?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\HtmlSanitizer\Type;
+
+use Psr\Container\ContainerInterface;
+use Symfony\Component\Form\AbstractTypeExtension;
+use Symfony\Component\Form\Extension\Core\Type\TextType;
+use Symfony\Component\Form\FormBuilderInterface;
+use Symfony\Component\Form\FormEvent;
+use Symfony\Component\Form\FormEvents;
+use Symfony\Component\OptionsResolver\OptionsResolver;
+
+/**
+ * @author Titouan Galopin <galopintitouan@gmail.com>
+ */
+class TextTypeHtmlSanitizerExtension extends AbstractTypeExtension
+{
+    public function __construct(
+        private ContainerInterface $sanitizers,
+        private string $defaultSanitizer = 'default',
+    ) {
+    }
+
+    public static function getExtendedTypes(): iterable
+    {
+        return [TextType::class];
+    }
+
+    /**
+     * @return void
+     */
+    public function configureOptions(OptionsResolver $resolver)
+    {
+        $resolver
+            ->setDefaults(['sanitize_html' => false, 'sanitizer' => null])
+            ->setAllowedTypes('sanitize_html', 'bool')
+            ->setAllowedTypes('sanitizer', ['string', 'null'])
+        ;
+    }
+
+    /**
+     * @return void
+     */
+    public function buildForm(FormBuilderInterface $builder, array $options)
+    {
+        if (!$options['sanitize_html']) {
+            return;
+        }
+
+        $sanitizers = $this->sanitizers;
+        $sanitizer = $options['sanitizer'] ?? $this->defaultSanitizer;
+
+        $builder->addEventListener(
+            FormEvents::PRE_SUBMIT,
+            static function (FormEvent $event) use ($sanitizers, $sanitizer) {
+                if (\is_scalar($data = $event->getData()) && '' !== trim($data)) {
+                    $event->setData($sanitizers->get($sanitizer)->sanitize($data));
+                }
+            },
+            10000 /* as soon as possible */
+        );
+    }
+}