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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;
use Symfony\Component\Mime\Exception\RuntimeException;
use Symfony\Component\Mime\Part\DataPart;
use Symfony\Component\Mime\Part\Multipart\AlternativePart;
use Symfony\Component\Mime\Part\Multipart\MixedPart;
use Symfony\Component\Mime\Part\Multipart\RelatedPart;
use Symfony\Component\Mime\Part\TextPart;
/**
* @author Fabien Potencier <fabien@symfony.com>
*/
final class MessageConverter
{
/**
* @throws RuntimeException when unable to convert the message to an email
*/
public static function toEmail(Message $message): Email
{
if ($message instanceof Email) {
return $message;
}
// try to convert to a "simple" Email instance
$body = $message->getBody();
if ($body instanceof TextPart) {
return self::createEmailFromTextPart($message, $body);
}
if ($body instanceof AlternativePart) {
return self::createEmailFromAlternativePart($message, $body);
}
if ($body instanceof RelatedPart) {
return self::createEmailFromRelatedPart($message, $body);
}
if ($body instanceof MixedPart) {
$parts = $body->getParts();
if ($parts[0] instanceof RelatedPart) {
$email = self::createEmailFromRelatedPart($message, $parts[0]);
} elseif ($parts[0] instanceof AlternativePart) {
$email = self::createEmailFromAlternativePart($message, $parts[0]);
} elseif ($parts[0] instanceof TextPart) {
$email = self::createEmailFromTextPart($message, $parts[0]);
} else {
throw new RuntimeException(\sprintf('Unable to create an Email from an instance of "%s" as the body is too complex.', get_debug_type($message)));
}
return self::addParts($email, \array_slice($parts, 1));
}
throw new RuntimeException(\sprintf('Unable to create an Email from an instance of "%s" as the body is too complex.', get_debug_type($message)));
}
private static function createEmailFromTextPart(Message $message, TextPart $part): Email
{
if ('text' === $part->getMediaType() && 'plain' === $part->getMediaSubtype()) {
return (new Email(clone $message->getHeaders()))->text($part->getBody(), $part->getPreparedHeaders()->getHeaderParameter('Content-Type', 'charset') ?: 'utf-8');
}
if ('text' === $part->getMediaType() && 'html' === $part->getMediaSubtype()) {
return (new Email(clone $message->getHeaders()))->html($part->getBody(), $part->getPreparedHeaders()->getHeaderParameter('Content-Type', 'charset') ?: 'utf-8');
}
throw new RuntimeException(\sprintf('Unable to create an Email from an instance of "%s" as the body is too complex.', get_debug_type($message)));
}
private static function createEmailFromAlternativePart(Message $message, AlternativePart $part): Email
{
$parts = $part->getParts();
if (
2 === \count($parts)
&& $parts[0] instanceof TextPart && 'text' === $parts[0]->getMediaType() && 'plain' === $parts[0]->getMediaSubtype()
&& $parts[1] instanceof TextPart && 'text' === $parts[1]->getMediaType() && 'html' === $parts[1]->getMediaSubtype()
) {
return (new Email(clone $message->getHeaders()))
->text($parts[0]->getBody(), $parts[0]->getPreparedHeaders()->getHeaderParameter('Content-Type', 'charset') ?: 'utf-8')
->html($parts[1]->getBody(), $parts[1]->getPreparedHeaders()->getHeaderParameter('Content-Type', 'charset') ?: 'utf-8')
;
}
throw new RuntimeException(\sprintf('Unable to create an Email from an instance of "%s" as the body is too complex.', get_debug_type($message)));
}
private static function createEmailFromRelatedPart(Message $message, RelatedPart $part): Email
{
$parts = $part->getParts();
if ($parts[0] instanceof AlternativePart) {
$email = self::createEmailFromAlternativePart($message, $parts[0]);
} elseif ($parts[0] instanceof TextPart) {
$email = self::createEmailFromTextPart($message, $parts[0]);
} else {
throw new RuntimeException(\sprintf('Unable to create an Email from an instance of "%s" as the body is too complex.', get_debug_type($message)));
}
return self::addParts($email, \array_slice($parts, 1));
}
private static function addParts(Email $email, array $parts): Email
{
foreach ($parts as $part) {
if (!$part instanceof DataPart) {
throw new RuntimeException(\sprintf('Unable to create an Email from an instance of "%s" as the body is too complex.', get_debug_type($email)));
}
$email->addPart($part);
}
return $email;
}
}