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<?php
/*
* This file is part of SwiftMailer.
* (c) 2004-2009 Chris Corbyn
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* The Message class for building emails.
*
* @author Chris Corbyn
*/
class Swift_Message extends Swift_Mime_SimpleMessage
{
/**
* @var Swift_Signers_HeaderSigner[]
*/
private $headerSigners = [];
/**
* @var Swift_Signers_BodySigner[]
*/
private $bodySigners = [];
/**
* @var array
*/
private $savedMessage = [];
/**
* Create a new Message.
*
* Details may be optionally passed into the constructor.
*
* @param string $subject
* @param string $body
* @param string $contentType
* @param string $charset
*/
public function __construct($subject = null, $body = null, $contentType = null, $charset = null)
{
\call_user_func_array(
[$this, 'Swift_Mime_SimpleMessage::__construct'],
Swift_DependencyContainer::getInstance()
->createDependenciesFor('mime.message')
);
if (!isset($charset)) {
$charset = Swift_DependencyContainer::getInstance()
->lookup('properties.charset');
}
$this->setSubject($subject);
$this->setBody($body);
$this->setCharset($charset);
if ($contentType) {
$this->setContentType($contentType);
}
}
/**
* Add a MimePart to this Message.
*
* @param string|Swift_OutputByteStream $body
* @param string $contentType
* @param string $charset
*
* @return $this
*/
public function addPart($body, $contentType = null, $charset = null)
{
return $this->attach((new Swift_MimePart($body, $contentType, $charset))->setEncoder($this->getEncoder()));
}
/**
* Attach a new signature handler to the message.
*
* @return $this
*/
public function attachSigner(Swift_Signer $signer)
{
if ($signer instanceof Swift_Signers_HeaderSigner) {
$this->headerSigners[] = $signer;
} elseif ($signer instanceof Swift_Signers_BodySigner) {
$this->bodySigners[] = $signer;
}
return $this;
}
/**
* Detach a signature handler from a message.
*
* @return $this
*/
public function detachSigner(Swift_Signer $signer)
{
if ($signer instanceof Swift_Signers_HeaderSigner) {
foreach ($this->headerSigners as $k => $headerSigner) {
if ($headerSigner === $signer) {
unset($this->headerSigners[$k]);
return $this;
}
}
} elseif ($signer instanceof Swift_Signers_BodySigner) {
foreach ($this->bodySigners as $k => $bodySigner) {
if ($bodySigner === $signer) {
unset($this->bodySigners[$k]);
return $this;
}
}
}
return $this;
}
/**
* Clear all signature handlers attached to the message.
*
* @return $this
*/
public function clearSigners()
{
$this->headerSigners = [];
$this->bodySigners = [];
return $this;
}
/**
* Get this message as a complete string.
*
* @return string
*/
public function toString()
{
if (empty($this->headerSigners) && empty($this->bodySigners)) {
return parent::toString();
}
$this->saveMessage();
$this->doSign();
$string = parent::toString();
$this->restoreMessage();
return $string;
}
/**
* Write this message to a {@link Swift_InputByteStream}.
*/
public function toByteStream(Swift_InputByteStream $is)
{
if (empty($this->headerSigners) && empty($this->bodySigners)) {
parent::toByteStream($is);
return;
}
$this->saveMessage();
$this->doSign();
parent::toByteStream($is);
$this->restoreMessage();
}
public function __wakeup()
{
Swift_DependencyContainer::getInstance()->createDependenciesFor('mime.message');
}
/**
* loops through signers and apply the signatures.
*/
protected function doSign()
{
foreach ($this->bodySigners as $signer) {
$altered = $signer->getAlteredHeaders();
$this->saveHeaders($altered);
$signer->signMessage($this);
}
foreach ($this->headerSigners as $signer) {
$altered = $signer->getAlteredHeaders();
$this->saveHeaders($altered);
$signer->reset();
$signer->setHeaders($this->getHeaders());
$signer->startBody();
$this->bodyToByteStream($signer);
$signer->endBody();
$signer->addSignature($this->getHeaders());
}
}
/**
* save the message before any signature is applied.
*/
protected function saveMessage()
{
$this->savedMessage = ['headers' => []];
$this->savedMessage['body'] = $this->getBody();
$this->savedMessage['children'] = $this->getChildren();
if (\count($this->savedMessage['children']) > 0 && '' != $this->getBody()) {
$this->setChildren(array_merge([$this->becomeMimePart()], $this->savedMessage['children']));
$this->setBody('');
}
}
/**
* save the original headers.
*/
protected function saveHeaders(array $altered)
{
foreach ($altered as $head) {
$lc = strtolower($head);
if (!isset($this->savedMessage['headers'][$lc])) {
$this->savedMessage['headers'][$lc] = $this->getHeaders()->getAll($head);
}
}
}
/**
* Remove or restore altered headers.
*/
protected function restoreHeaders()
{
foreach ($this->savedMessage['headers'] as $name => $savedValue) {
$headers = $this->getHeaders()->getAll($name);
foreach ($headers as $key => $value) {
if (!isset($savedValue[$key])) {
$this->getHeaders()->remove($name, $key);
}
}
}
}
/**
* Restore message body.
*/
protected function restoreMessage()
{
$this->setBody($this->savedMessage['body']);
$this->setChildren($this->savedMessage['children']);
$this->restoreHeaders();
$this->savedMessage = [];
}
/**
* Clone Message Signers.
*
* @see Swift_Mime_SimpleMimeEntity::__clone()
*/
public function __clone()
{
parent::__clone();
foreach ($this->bodySigners as $key => $bodySigner) {
$this->bodySigners[$key] = clone $bodySigner;
}
foreach ($this->headerSigners as $key => $headerSigner) {
$this->headerSigners[$key] = clone $headerSigner;
}
}
}