/home/mip/www/img/credit/datatables/Part.tar
AbstractPart.php000064400000002763151520545200007656 0ustar00<?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;

use Symfony\Component\Mime\Header\Headers;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 */
abstract class AbstractPart
{
    private Headers $headers;

    public function __construct()
    {
        $this->headers = new Headers();
    }

    public function getHeaders(): Headers
    {
        return $this->headers;
    }

    public function getPreparedHeaders(): Headers
    {
        $headers = clone $this->headers;
        $headers->setHeaderBody('Parameterized', 'Content-Type', $this->getMediaType().'/'.$this->getMediaSubtype());

        return $headers;
    }

    public function toString(): string
    {
        return $this->getPreparedHeaders()->toString()."\r\n".$this->bodyToString();
    }

    public function toIterable(): iterable
    {
        yield $this->getPreparedHeaders()->toString();
        yield "\r\n";
        yield from $this->bodyToIterable();
    }

    public function asDebugString(): string
    {
        return $this->getMediaType().'/'.$this->getMediaSubtype();
    }

    abstract public function bodyToString(): string;

    abstract public function bodyToIterable(): iterable;

    abstract public function getMediaType(): string;

    abstract public function getMediaSubtype(): string;
}
DataPart.php000064400000010775151520545200006766 0ustar00<?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;

use Symfony\Component\Mime\Exception\InvalidArgumentException;
use Symfony\Component\Mime\Header\Headers;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 */
class DataPart extends TextPart
{
    /** @internal */
    protected array $_parent;

    private ?string $filename = null;
    private string $mediaType;
    private ?string $cid = null;

    /**
     * @param resource|string|File $body Use a File instance to defer loading the file until rendering
     */
    public function __construct($body, ?string $filename = null, ?string $contentType = null, ?string $encoding = null)
    {
        if ($body instanceof File && !$filename) {
            $filename = $body->getFilename();
        }

        $contentType ??= $body instanceof File ? $body->getContentType() : 'application/octet-stream';
        [$this->mediaType, $subtype] = explode('/', $contentType);

        parent::__construct($body, null, $subtype, $encoding);

        if (null !== $filename) {
            $this->filename = $filename;
            $this->setName($filename);
        }
        $this->setDisposition('attachment');
    }

    public static function fromPath(string $path, ?string $name = null, ?string $contentType = null): self
    {
        return new self(new File($path), $name, $contentType);
    }

    /**
     * @return $this
     */
    public function asInline(): static
    {
        return $this->setDisposition('inline');
    }

    /**
     * @return $this
     */
    public function setContentId(string $cid): static
    {
        if (!str_contains($cid, '@')) {
            throw new InvalidArgumentException(sprintf('Invalid cid "%s".', $cid));
        }

        $this->cid = $cid;

        return $this;
    }

    public function getContentId(): string
    {
        return $this->cid ?: $this->cid = $this->generateContentId();
    }

    public function hasContentId(): bool
    {
        return null !== $this->cid;
    }

    public function getMediaType(): string
    {
        return $this->mediaType;
    }

    public function getPreparedHeaders(): Headers
    {
        $headers = parent::getPreparedHeaders();

        if (null !== $this->cid) {
            $headers->setHeaderBody('Id', 'Content-ID', $this->cid);
        }

        if (null !== $this->filename) {
            $headers->setHeaderParameter('Content-Disposition', 'filename', $this->filename);
        }

        return $headers;
    }

    public function asDebugString(): string
    {
        $str = parent::asDebugString();
        if (null !== $this->filename) {
            $str .= ' filename: '.$this->filename;
        }

        return $str;
    }

    public function getFilename(): ?string
    {
        return $this->filename;
    }

    public function getContentType(): string
    {
        return implode('/', [$this->getMediaType(), $this->getMediaSubtype()]);
    }

    private function generateContentId(): string
    {
        return bin2hex(random_bytes(16)).'@symfony';
    }

    public function __sleep(): array
    {
        // converts the body to a string
        parent::__sleep();

        $this->_parent = [];
        foreach (['body', 'charset', 'subtype', 'disposition', 'name', 'encoding'] as $name) {
            $r = new \ReflectionProperty(TextPart::class, $name);
            $this->_parent[$name] = $r->getValue($this);
        }
        $this->_headers = $this->getHeaders();

        return ['_headers', '_parent', 'filename', 'mediaType'];
    }

    /**
     * @return void
     */
    public function __wakeup()
    {
        $r = new \ReflectionProperty(AbstractPart::class, 'headers');
        $r->setValue($this, $this->_headers);
        unset($this->_headers);

        if (!\is_array($this->_parent)) {
            throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
        }
        foreach (['body', 'charset', 'subtype', 'disposition', 'name', 'encoding'] as $name) {
            if (null !== $this->_parent[$name] && !\is_string($this->_parent[$name]) && !$this->_parent[$name] instanceof File) {
                throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
            }
            $r = new \ReflectionProperty(TextPart::class, $name);
            $r->setValue($this, $this->_parent[$name]);
        }
        unset($this->_parent);
    }
}
Multipart/FormDataPart.php000064400000006123151520545200011563 0ustar00<?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\DataPart;
use Symfony\Component\Mime\Part\TextPart;

/**
 * Implements RFC 7578.
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
final class FormDataPart extends AbstractMultipartPart
{
    private array $fields = [];

    /**
     * @param array<string|array|DataPart> $fields
     */
    public function __construct(array $fields = [])
    {
        parent::__construct();

        $this->fields = $fields;

        // 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;
    }
}
Multipart/AlternativePart.php000064400000001047151520545200012344 0ustar00<?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';
    }
}
Multipart/DigestPart.php000064400000001266151520545200011310 0ustar00<?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';
    }
}
Multipart/MixedPart.php000064400000001033151520545200011127 0ustar00<?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';
    }
}
Multipart/RelatedPart.php000064400000002570151520545200011450 0ustar00<?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
{
    private AbstractPart $mainPart;

    public function __construct(AbstractPart $mainPart, AbstractPart $part, AbstractPart ...$parts)
    {
        $this->mainPart = $mainPart;
        $this->prepareParts($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());
            }
        }
    }
}
AbstractMultipartPart.php000064400000004360151520545200011553 0ustar00<?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;

use Symfony\Component\Mime\Header\Headers;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 */
abstract class AbstractMultipartPart extends AbstractPart
{
    private ?string $boundary = null;
    private array $parts = [];

    public function __construct(AbstractPart ...$parts)
    {
        parent::__construct();

        foreach ($parts as $part) {
            $this->parts[] = $part;
        }
    }

    /**
     * @return AbstractPart[]
     */
    public function getParts(): array
    {
        return $this->parts;
    }

    public function getMediaType(): string
    {
        return 'multipart';
    }

    public function getPreparedHeaders(): Headers
    {
        $headers = parent::getPreparedHeaders();
        $headers->setHeaderParameter('Content-Type', 'boundary', $this->getBoundary());

        return $headers;
    }

    public function bodyToString(): string
    {
        $parts = $this->getParts();
        $string = '';
        foreach ($parts as $part) {
            $string .= '--'.$this->getBoundary()."\r\n".$part->toString()."\r\n";
        }
        $string .= '--'.$this->getBoundary()."--\r\n";

        return $string;
    }

    public function bodyToIterable(): iterable
    {
        $parts = $this->getParts();
        foreach ($parts as $part) {
            yield '--'.$this->getBoundary()."\r\n";
            yield from $part->toIterable();
            yield "\r\n";
        }
        yield '--'.$this->getBoundary()."--\r\n";
    }

    public function asDebugString(): string
    {
        $str = parent::asDebugString();
        foreach ($this->getParts() as $part) {
            $lines = explode("\n", $part->asDebugString());
            $str .= "\n  └ ".array_shift($lines);
            foreach ($lines as $line) {
                $str .= "\n  |".$line;
            }
        }

        return $str;
    }

    private function getBoundary(): string
    {
        return $this->boundary ??= strtr(base64_encode(random_bytes(6)), '+/', '-_');
    }
}
File.php000064400000002107151520545200006133 0ustar00<?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;

use Symfony\Component\Mime\MimeTypes;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 */
class File
{
    private static MimeTypes $mimeTypes;

    public function __construct(
        private string $path,
        private ?string $filename = null,
    ) {
    }

    public function getPath(): string
    {
        return $this->path;
    }

    public function getContentType(): string
    {
        $ext = strtolower(pathinfo($this->path, \PATHINFO_EXTENSION));
        self::$mimeTypes ??= new MimeTypes();

        return self::$mimeTypes->getMimeTypes($ext)[0] ?? 'application/octet-stream';
    }

    public function getSize(): int
    {
        return filesize($this->path);
    }

    public function getFilename(): string
    {
        return $this->filename ??= basename($this->getPath());
    }
}
SMimePart.php000064400000005033151520545200007116 0ustar00<?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;

use Symfony\Component\Mime\Header\Headers;

/**
 * @author Sebastiaan Stok <s.stok@rollerscapes.net>
 */
class SMimePart extends AbstractPart
{
    /** @internal */
    protected Headers $_headers;

    private iterable|string $body;
    private string $type;
    private string $subtype;
    private array $parameters;

    public function __construct(iterable|string $body, string $type, string $subtype, array $parameters)
    {
        parent::__construct();

        $this->body = $body;
        $this->type = $type;
        $this->subtype = $subtype;
        $this->parameters = $parameters;
    }

    public function getMediaType(): string
    {
        return $this->type;
    }

    public function getMediaSubtype(): string
    {
        return $this->subtype;
    }

    public function bodyToString(): string
    {
        if (\is_string($this->body)) {
            return $this->body;
        }

        $body = '';
        foreach ($this->body as $chunk) {
            $body .= $chunk;
        }
        $this->body = $body;

        return $body;
    }

    public function bodyToIterable(): iterable
    {
        if (\is_string($this->body)) {
            yield $this->body;

            return;
        }

        $body = '';
        foreach ($this->body as $chunk) {
            $body .= $chunk;
            yield $chunk;
        }
        $this->body = $body;
    }

    public function getPreparedHeaders(): Headers
    {
        $headers = clone parent::getHeaders();

        $headers->setHeaderBody('Parameterized', 'Content-Type', $this->getMediaType().'/'.$this->getMediaSubtype());

        foreach ($this->parameters as $name => $value) {
            $headers->setHeaderParameter('Content-Type', $name, $value);
        }

        return $headers;
    }

    public function __sleep(): array
    {
        // convert iterables to strings for serialization
        if (is_iterable($this->body)) {
            $this->body = $this->bodyToString();
        }

        $this->_headers = $this->getHeaders();

        return ['_headers', 'body', 'type', 'subtype', 'parameters'];
    }

    public function __wakeup(): void
    {
        $r = new \ReflectionProperty(AbstractPart::class, 'headers');
        $r->setValue($this, $this->_headers);
        unset($this->_headers);
    }
}
MessagePart.php000064400000002644151520545200007475 0ustar00<?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;

use Symfony\Component\Mime\Message;
use Symfony\Component\Mime\RawMessage;

/**
 * @final
 *
 * @author Fabien Potencier <fabien@symfony.com>
 */
class MessagePart extends DataPart
{
    private RawMessage $message;

    public function __construct(RawMessage $message)
    {
        if ($message instanceof Message) {
            $name = $message->getHeaders()->getHeaderBody('Subject').'.eml';
        } else {
            $name = 'email.eml';
        }
        parent::__construct('', $name);

        $this->message = $message;
    }

    public function getMediaType(): string
    {
        return 'message';
    }

    public function getMediaSubtype(): string
    {
        return 'rfc822';
    }

    public function getBody(): string
    {
        return $this->message->toString();
    }

    public function bodyToString(): string
    {
        return $this->getBody();
    }

    public function bodyToIterable(): iterable
    {
        return $this->message->toIterable();
    }

    public function __sleep(): array
    {
        return ['message'];
    }

    public function __wakeup(): void
    {
        $this->__construct($this->message);
    }
}
TextPart.php000064400000016067151520545200007041 0ustar00<?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;

use Symfony\Component\Mime\Encoder\Base64ContentEncoder;
use Symfony\Component\Mime\Encoder\ContentEncoderInterface;
use Symfony\Component\Mime\Encoder\EightBitContentEncoder;
use Symfony\Component\Mime\Encoder\QpContentEncoder;
use Symfony\Component\Mime\Exception\InvalidArgumentException;
use Symfony\Component\Mime\Header\Headers;

/**
 * @author Fabien Potencier <fabien@symfony.com>
 */
class TextPart extends AbstractPart
{
    /** @internal */
    protected Headers $_headers;

    private static array $encoders = [];

    /** @var resource|string|File */
    private $body;
    private ?string $charset;
    private string $subtype;
    private ?string $disposition = null;
    private ?string $name = null;
    private string $encoding;
    private ?bool $seekable = null;

    /**
     * @param resource|string|File $body Use a File instance to defer loading the file until rendering
     */
    public function __construct($body, ?string $charset = 'utf-8', string $subtype = 'plain', ?string $encoding = null)
    {
        parent::__construct();

        if (!\is_string($body) && !\is_resource($body) && !$body instanceof File) {
            throw new \TypeError(sprintf('The body of "%s" must be a string, a resource, or an instance of "%s" (got "%s").', self::class, File::class, get_debug_type($body)));
        }

        if ($body instanceof File) {
            $path = $body->getPath();
            if ((is_file($path) && !is_readable($path)) || is_dir($path)) {
                throw new InvalidArgumentException(sprintf('Path "%s" is not readable.', $path));
            }
        }

        $this->body = $body;
        $this->charset = $charset;
        $this->subtype = $subtype;
        $this->seekable = \is_resource($body) ? stream_get_meta_data($body)['seekable'] && 0 === fseek($body, 0, \SEEK_CUR) : null;

        if (null === $encoding) {
            $this->encoding = $this->chooseEncoding();
        } else {
            if ('quoted-printable' !== $encoding && 'base64' !== $encoding && '8bit' !== $encoding) {
                throw new InvalidArgumentException(sprintf('The encoding must be one of "quoted-printable", "base64", or "8bit" ("%s" given).', $encoding));
            }
            $this->encoding = $encoding;
        }
    }

    public function getMediaType(): string
    {
        return 'text';
    }

    public function getMediaSubtype(): string
    {
        return $this->subtype;
    }

    /**
     * @param string $disposition one of attachment, inline, or form-data
     *
     * @return $this
     */
    public function setDisposition(string $disposition): static
    {
        $this->disposition = $disposition;

        return $this;
    }

    /**
     * @return ?string null or one of attachment, inline, or form-data
     */
    public function getDisposition(): ?string
    {
        return $this->disposition;
    }

    /**
     * Sets the name of the file (used by FormDataPart).
     *
     * @return $this
     */
    public function setName(string $name): static
    {
        $this->name = $name;

        return $this;
    }

    /**
     * Gets the name of the file.
     */
    public function getName(): ?string
    {
        return $this->name;
    }

    public function getBody(): string
    {
        if ($this->body instanceof File) {
            return file_get_contents($this->body->getPath());
        }

        if (null === $this->seekable) {
            return $this->body;
        }

        if ($this->seekable) {
            rewind($this->body);
        }

        return stream_get_contents($this->body) ?: '';
    }

    public function bodyToString(): string
    {
        return $this->getEncoder()->encodeString($this->getBody(), $this->charset);
    }

    public function bodyToIterable(): iterable
    {
        if ($this->body instanceof File) {
            $path = $this->body->getPath();
            if (false === $handle = @fopen($path, 'r', false)) {
                throw new InvalidArgumentException(sprintf('Unable to open path "%s".', $path));
            }

            yield from $this->getEncoder()->encodeByteStream($handle);
        } elseif (null !== $this->seekable) {
            if ($this->seekable) {
                rewind($this->body);
            }
            yield from $this->getEncoder()->encodeByteStream($this->body);
        } else {
            yield $this->getEncoder()->encodeString($this->body);
        }
    }

    public function getPreparedHeaders(): Headers
    {
        $headers = parent::getPreparedHeaders();

        $headers->setHeaderBody('Parameterized', 'Content-Type', $this->getMediaType().'/'.$this->getMediaSubtype());
        if ($this->charset) {
            $headers->setHeaderParameter('Content-Type', 'charset', $this->charset);
        }
        if ($this->name && 'form-data' !== $this->disposition) {
            $headers->setHeaderParameter('Content-Type', 'name', $this->name);
        }
        $headers->setHeaderBody('Text', 'Content-Transfer-Encoding', $this->encoding);

        if (!$headers->has('Content-Disposition') && null !== $this->disposition) {
            $headers->setHeaderBody('Parameterized', 'Content-Disposition', $this->disposition);
            if ($this->name) {
                $headers->setHeaderParameter('Content-Disposition', 'name', $this->name);
            }
        }

        return $headers;
    }

    public function asDebugString(): string
    {
        $str = parent::asDebugString();
        if (null !== $this->charset) {
            $str .= ' charset: '.$this->charset;
        }
        if (null !== $this->disposition) {
            $str .= ' disposition: '.$this->disposition;
        }

        return $str;
    }

    private function getEncoder(): ContentEncoderInterface
    {
        if ('8bit' === $this->encoding) {
            return self::$encoders[$this->encoding] ??= new EightBitContentEncoder();
        }

        if ('quoted-printable' === $this->encoding) {
            return self::$encoders[$this->encoding] ??= new QpContentEncoder();
        }

        return self::$encoders[$this->encoding] ??= new Base64ContentEncoder();
    }

    private function chooseEncoding(): string
    {
        if (null === $this->charset) {
            return 'base64';
        }

        return 'quoted-printable';
    }

    public function __sleep(): array
    {
        // convert resources to strings for serialization
        if (null !== $this->seekable) {
            $this->body = $this->getBody();
            $this->seekable = null;
        }

        $this->_headers = $this->getHeaders();

        return ['_headers', 'body', 'charset', 'subtype', 'disposition', 'name', 'encoding'];
    }

    /**
     * @return void
     */
    public function __wakeup()
    {
        $r = new \ReflectionProperty(AbstractPart::class, 'headers');
        $r->setValue($this, $this->_headers);
        unset($this->_headers);
    }
}