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148 lars 1 
<?php
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/*
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 * This file is part of the Symfony package.
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 *
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 * (c) Fabien Potencier <fabien@symfony.com>
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace Symfony\Component\Mailer;
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use Symfony\Component\Mailer\Exception\LogicException;
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use Symfony\Component\Mime\Address;
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use Symfony\Component\Mime\Header\Headers;
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use Symfony\Component\Mime\Message;
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/**
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 * @author Fabien Potencier <fabien@symfony.com>
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 *
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 * @internal
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 */
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final class DelayedEnvelope extends Envelope
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{
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    private bool $senderSet = false;
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    private bool $recipientsSet = false;
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    private Message $message;
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    public function __construct(Message $message)
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    {
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        $this->message = $message;
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    }
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    public function setSender(Address $sender): void
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    {
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        parent::setSender($sender);
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        $this->senderSet = true;
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    }
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    public function getSender(): Address
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    {
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        if (!$this->senderSet) {
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            parent::setSender(self::getSenderFromHeaders($this->message->getHeaders()));
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        }
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        return parent::getSender();
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    }
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    public function setRecipients(array $recipients): void
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    {
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        parent::setRecipients($recipients);
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        $this->recipientsSet = (bool) parent::getRecipients();
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    }
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    /**
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     * @return Address[]
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     */
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    public function getRecipients(): array
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    {
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        if ($this->recipientsSet) {
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            return parent::getRecipients();
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        }
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        return self::getRecipientsFromHeaders($this->message->getHeaders());
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    }
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    private static function getRecipientsFromHeaders(Headers $headers): array
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    {
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        $recipients = [];
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        foreach (['to', 'cc', 'bcc'] as $name) {
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            foreach ($headers->all($name) as $header) {
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                foreach ($header->getAddresses() as $address) {
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                    $recipients[] = $address;
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                }
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            }
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        }
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        return $recipients;
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    }
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    private static function getSenderFromHeaders(Headers $headers): Address
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    {
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        if ($sender = $headers->get('Sender')) {
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            return $sender->getAddress();
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        }
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        if ($return = $headers->get('Return-Path')) {
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            return $return->getAddress();
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        }
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        if ($from = $headers->get('From')) {
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            return $from->getAddresses()[0];
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        }
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        throw new LogicException('Unable to determine the sender of the message.');
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    }
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}