Initial Drupal 11 with DDEV setup

vendor/symfony/mime/Part/Multipart/AlternativePart.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\Mime\Part\Multipart;
+
+use Symfony\Component\Mime\Part\AbstractMultipartPart;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+final class AlternativePart extends AbstractMultipartPart
+{
+    public function getMediaSubtype(): string
+    {
+        return 'alternative';
+    }
+}

vendor/symfony/mime/Part/Multipart/DigestPart.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\Mime\Part\Multipart;
+
+use Symfony\Component\Mime\Part\AbstractMultipartPart;
+use Symfony\Component\Mime\Part\MessagePart;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+final class DigestPart extends AbstractMultipartPart
+{
+    public function __construct(MessagePart ...$parts)
+    {
+        parent::__construct(...$parts);
+    }
+
+    public function getMediaSubtype(): string
+    {
+        return 'digest';
+    }
+}

vendor/symfony/mime/Part/Multipart/FormDataPart.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\Mime\Part\Multipart;
+
+use Symfony\Component\Mime\Exception\InvalidArgumentException;
+use Symfony\Component\Mime\Part\AbstractMultipartPart;
+use Symfony\Component\Mime\Part\TextPart;
+
+/**
+ * Implements RFC 7578.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+final class FormDataPart extends AbstractMultipartPart
+{
+    /**
+     * @param array<string|array|TextPart> $fields
+     */
+    public function __construct(
+        private array $fields = [],
+    ) {
+        parent::__construct();
+
+        // HTTP does not support \r\n in header values
+        $this->getHeaders()->setMaxLineLength(\PHP_INT_MAX);
+    }
+
+    public function getMediaSubtype(): string
+    {
+        return 'form-data';
+    }
+
+    public function getParts(): array
+    {
+        return $this->prepareFields($this->fields);
+    }
+
+    private function prepareFields(array $fields): array
+    {
+        $values = [];
+
+        $prepare = function ($item, $key, $root = null) use (&$values, &$prepare) {
+            if (null === $root && \is_int($key) && \is_array($item)) {
+                if (1 !== \count($item)) {
+                    throw new InvalidArgumentException(\sprintf('Form field values with integer keys can only have one array element, the key being the field name and the value being the field value, %d provided.', \count($item)));
+                }
+
+                $key = key($item);
+                $item = $item[$key];
+            }
+
+            $fieldName = null !== $root ? \sprintf('%s[%s]', $root, $key) : $key;
+
+            if (\is_array($item)) {
+                array_walk($item, $prepare, $fieldName);
+
+                return;
+            }
+
+            if (!\is_string($item) && !$item instanceof TextPart) {
+                throw new InvalidArgumentException(\sprintf('The value of the form field "%s" can only be a string, an array, or an instance of TextPart, "%s" given.', $fieldName, get_debug_type($item)));
+            }
+
+            $values[] = $this->preparePart($fieldName, $item);
+        };
+
+        array_walk($fields, $prepare);
+
+        return $values;
+    }
+
+    private function preparePart(string $name, string|TextPart $value): TextPart
+    {
+        if (\is_string($value)) {
+            return $this->configurePart($name, new TextPart($value, 'utf-8', 'plain', '8bit'));
+        }
+
+        return $this->configurePart($name, $value);
+    }
+
+    private function configurePart(string $name, TextPart $part): TextPart
+    {
+        static $r;
+
+        $r ??= new \ReflectionProperty(TextPart::class, 'encoding');
+
+        $part->setDisposition('form-data');
+        $part->setName($name);
+        // HTTP does not support \r\n in header values
+        $part->getHeaders()->setMaxLineLength(\PHP_INT_MAX);
+        $r->setValue($part, '8bit');
+
+        return $part;
+    }
+}

vendor/symfony/mime/Part/Multipart/MixedPart.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\Mime\Part\Multipart;
+
+use Symfony\Component\Mime\Part\AbstractMultipartPart;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+final class MixedPart extends AbstractMultipartPart
+{
+    public function getMediaSubtype(): string
+    {
+        return 'mixed';
+    }
+}

vendor/symfony/mime/Part/Multipart/RelatedPart.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\Mime\Part\Multipart;
+
+use Symfony\Component\Mime\Part\AbstractMultipartPart;
+use Symfony\Component\Mime\Part\AbstractPart;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+final class RelatedPart extends AbstractMultipartPart
+{
+    public function __construct(
+        private AbstractPart $mainPart,
+        AbstractPart $part,
+        AbstractPart ...$parts,
+    ) {
+        $this->prepareParts($part, ...$parts);
+
+        parent::__construct($part, ...$parts);
+    }
+
+    public function getParts(): array
+    {
+        return array_merge([$this->mainPart], parent::getParts());
+    }
+
+    public function getMediaSubtype(): string
+    {
+        return 'related';
+    }
+
+    private function generateContentId(): string
+    {
+        return bin2hex(random_bytes(16)).'@symfony';
+    }
+
+    private function prepareParts(AbstractPart ...$parts): void
+    {
+        foreach ($parts as $part) {
+            if (!$part->getHeaders()->has('Content-ID')) {
+                $part->getHeaders()->setHeaderBody('Id', 'Content-ID', $this->generateContentId());
+            }
+        }
+    }
+}