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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\Mailer\Bridge\Amazon\Transport;
use Psr\Log\LoggerInterface;
use Symfony\Component\Mailer\Envelope;
use Symfony\Component\Mailer\Exception\HttpTransportException;
use Symfony\Component\Mailer\SentMessage;
use Symfony\Component\Mailer\Transport\AbstractApiTransport;
use Symfony\Component\Mime\Email;
use Symfony\Contracts\EventDispatcher\EventDispatcherInterface;
use Symfony\Contracts\HttpClient\HttpClientInterface;
use Symfony\Contracts\HttpClient\ResponseInterface;
/**
 * @author Kevin Verschaeve
 */
class SesApiTransport extends AbstractApiTransport
{
    private const HOST = 'email.%region%.amazonaws.com';
    private $accessKey;
    private $secretKey;
    private $region;
    /**
     * @param string $region Amazon SES region (currently one of us-east-1, us-west-2, or eu-west-1)
     */
    public function __construct(string $accessKey, string $secretKey, string $region = null, HttpClientInterface $client = null, EventDispatcherInterface $dispatcher = null, LoggerInterface $logger = null)
    {
        $this->accessKey = $accessKey;
        $this->secretKey = $secretKey;
        $this->region = $region ?: 'eu-west-1';
        parent::__construct($client, $dispatcher, $logger);
    }
    public function __toString(): string
    {
        return sprintf('ses+api://%s@%s', $this->accessKey, $this->getEndpoint());
    }
    protected function doSendApi(SentMessage $sentMessage, Email $email, Envelope $envelope): ResponseInterface
    {
        $date = gmdate('D, d M Y H:i:s e');
        $auth = sprintf('AWS3-HTTPS AWSAccessKeyId=%s,Algorithm=HmacSHA256,Signature=%s', $this->accessKey, $this->getSignature($date));
        $response = $this->client->request('POST', 'https://'.$this->getEndpoint(), [
            'headers' => [
                'X-Amzn-Authorization' => $auth,
                'Date' => $date,
                'Content-Type' => 'application/x-www-form-urlencoded',
            ],
            'body' => $payload = $this->getPayload($email, $envelope),
        ]);
        $result = new \SimpleXMLElement($response->getContent(false));
        if (200 !== $response->getStatusCode()) {
            throw new HttpTransportException(sprintf('Unable to send an email: %s (code %d).', $result->Error->Message, $result->Error->Code), $response);
        }
        $property = $payload['Action'].'Result';
        $sentMessage->setMessageId($result->{$property}->MessageId);
        return $response;
    }
    private function getEndpoint(): ?string
    {
        return ($this->host ?: str_replace('%region%', $this->region, self::HOST)).($this->port ? ':'.$this->port : '');
    }
    private function getSignature(string $string): string
    {
        return base64_encode(hash_hmac('sha256', $string, $this->secretKey, true));
    }
    private function getPayload(Email $email, Envelope $envelope): array
    {
        if ($email->getAttachments()) {
            return [
                'Action' => 'SendRawEmail',
                'RawMessage.Data' => base64_encode($email->toString()),
            ];
        }
        $payload = [
            'Action' => 'SendEmail',
            'Destination.ToAddresses.member' => $this->stringifyAddresses($this->getRecipients($email, $envelope)),
            'Message.Subject.Data' => $email->getSubject(),
            'Source' => $envelope->getSender()->toString(),
        ];
        if ($emails = $email->getCc()) {
            $payload['Destination.CcAddresses.member'] = $this->stringifyAddresses($emails);
        }
        if ($emails = $email->getBcc()) {
            $payload['Destination.BccAddresses.member'] = $this->stringifyAddresses($emails);
        }
        if ($email->getTextBody()) {
            $payload['Message.Body.Text.Data'] = $email->getTextBody();
        }
        if ($email->getHtmlBody()) {
            $payload['Message.Body.Html.Data'] = $email->getHtmlBody();
        }
        return $payload;
    }
}