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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.
*/
//@require 'Swift/Events/SendListener.php';
//@require 'Swift/Events/SendEvent.php';
//@require 'Swift/Plugins/Decorator/Replacements.php';
/**
* Allows customization of Messages on-the-fly.
*
* @package Swift
* @subpackage Plugins
*
* @author Chris Corbyn
*/
class Swift_Plugins_DecoratorPlugin
implements Swift_Events_SendListener, Swift_Plugins_Decorator_Replacements
{
/** The replacement map */
private $_replacements;
/** The body as it was before replacements */
private $_orginalBody;
/** The original subject of the message, before replacements */
private $_originalSubject;
/** Bodies of children before they are replaced */
private $_originalChildBodies = array();
/** The Message that was last replaced */
private $_lastMessage;
/**
* Create a new DecoratorPlugin with $replacements.
*
* The $replacements can either be an associative array, or an implementation
* of {@link Swift_Plugins_Decorator_Replacements}.
*
* When using an array, it should be of the form:
* <code>
* $replacements = array(
* "address1@domain.tld" => array("{a}" => "b", "{c}" => "d"),
* "address2@domain.tld" => array("{a}" => "x", "{c}" => "y")
* )
* </code>
*
* When using an instance of {@link Swift_Plugins_Decorator_Replacements},
* the object should return just the array of replacements for the address
* given to {@link Swift_Plugins_Decorator_Replacements::getReplacementsFor()}.
*
* @param mixed $replacements
*/
public function __construct($replacements)
{
if (!($replacements instanceof Swift_Plugins_Decorator_Replacements))
{
$this->_replacements = (array) $replacements;
}
else
{
$this->_replacements = $replacements;
}
}
/**
* Invoked immediately before the Message is sent.
*
* @param Swift_Events_SendEvent $evt
*/
public function beforeSendPerformed(Swift_Events_SendEvent $evt)
{
$message = $evt->getMessage();
$this->_restoreMessage($message);
$to = array_keys($message->getTo());
$address = array_shift($to);
if ($replacements = $this->getReplacementsFor($address))
{
$body = $message->getBody();
$search = array_keys($replacements);
$replace = array_values($replacements);
$bodyReplaced = str_replace(
$search, $replace, $body
);
if ($body != $bodyReplaced)
{
$this->_originalBody = $body;
$message->setBody($bodyReplaced);
}
$subject = $message->getSubject();
$subjectReplaced = str_replace(
$search, $replace, $subject
);
if ($subject != $subjectReplaced)
{
$this->_originalSubject = $subject;
$message->setSubject($subjectReplaced);
}
$children = (array) $message->getChildren();
foreach ($children as $child)
{
list($type, ) = sscanf($child->getContentType(), '%[^/]/%s');
if ('text' == $type)
{
$body = $child->getBody();
$bodyReplaced = str_replace(
$search, $replace, $body
);
if ($body != $bodyReplaced)
{
$child->setBody($bodyReplaced);
$this->_originalChildBodies[$child->getId()] = $body;
}
}
}
$this->_lastMessage = $message;
}
}
/**
* Find a map of replacements for the address.
*
* If this plugin was provided with a delegate instance of
* {@link Swift_Plugins_Decorator_Replacements} then the call will be
* delegated to it. Otherwise, it will attempt to find the replacements
* from the array provided in the constructor.
*
* If no replacements can be found, an empty value (NULL) is returned.
*
* @param string $address
*
* @return array
*/
public function getReplacementsFor($address)
{
if ($this->_replacements instanceof Swift_Plugins_Decorator_Replacements)
{
return $this->_replacements->getReplacementsFor($address);
}
else
{
return isset($this->_replacements[$address])
? $this->_replacements[$address]
: null
;
}
}
/**
* Invoked immediately after the Message is sent.
*
* @param Swift_Events_SendEvent $evt
*/
public function sendPerformed(Swift_Events_SendEvent $evt)
{
$this->_restoreMessage($evt->getMessage());
}
// -- Private methods
/** Restore a changed message back to its original state */
private function _restoreMessage(Swift_Mime_Message $message)
{
if ($this->_lastMessage === $message)
{
if (isset($this->_originalBody))
{
$message->setBody($this->_originalBody);
$this->_originalBody = null;
}
if (isset($this->_originalSubject))
{
$message->setSubject($this->_originalSubject);
$this->_originalSubject = null;
}
if (!empty($this->_originalChildBodies))
{
$children = (array) $message->getChildren();
foreach ($children as $child)
{
$id = $child->getId();
if (array_key_exists($id, $this->_originalChildBodies))
{
$child->setBody($this->_originalChildBodies[$id]);
}
}
$this->_originalChildBodies = array();
}
$this->_lastMessage = null;
}
}
}
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