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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/EventDispatcher.php';
//@require 'Swift/Events/EventListener.php';
//@require 'Swift/Events/EventObject.php';
//@require 'Swift/Events/CommandEvent.php';
//@require 'Swift/Events/ResponseEvent.php';
//@require 'Swift/Events/SendEvent.php';
//@require 'Swift/Events/TransportChangeEvent.php';
//@require 'Swift/Events/TransportExceptionEvent.php';
/**
* The EventDispatcher which handles the event dispatching layer.
*
* @package Swift
* @subpackage Events
* @author Chris Corbyn
*/
class Swift_Events_SimpleEventDispatcher implements Swift_Events_EventDispatcher
{
/** A map of event types to their associated listener types */
private $_eventMap = array();
/** Event listeners bound to this dispatcher */
private $_listeners = array();
/** Listeners queued to have an Event bubbled up the stack to them */
private $_bubbleQueue = array();
/**
* Create a new EventDispatcher.
*/
public function __construct()
{
$this->_eventMap = array(
'Swift_Events_CommandEvent' => 'Swift_Events_CommandListener',
'Swift_Events_ResponseEvent' => 'Swift_Events_ResponseListener',
'Swift_Events_SendEvent' => 'Swift_Events_SendListener',
'Swift_Events_TransportChangeEvent' => 'Swift_Events_TransportChangeListener',
'Swift_Events_TransportExceptionEvent' => 'Swift_Events_TransportExceptionListener'
);
}
/**
* Create a new SendEvent for $source and $message.
*
* @param Swift_Transport $source
* @param Swift_Mime_Message
* @return Swift_Events_SendEvent
*/
public function createSendEvent(Swift_Transport $source,
Swift_Mime_Message $message)
{
return new Swift_Events_SendEvent($source, $message);
}
/**
* Create a new CommandEvent for $source and $command.
*
* @param Swift_Transport $source
* @param string $command That will be executed
* @param array $successCodes That are needed
* @return Swift_Events_CommandEvent
*/
public function createCommandEvent(Swift_Transport $source,
$command, $successCodes = array())
{
return new Swift_Events_CommandEvent($source, $command, $successCodes);
}
/**
* Create a new ResponseEvent for $source and $response.
*
* @param Swift_Transport $source
* @param string $response
* @param boolean $valid If the response is valid
* @return Swift_Events_ResponseEvent
*/
public function createResponseEvent(Swift_Transport $source,
$response, $valid)
{
return new Swift_Events_ResponseEvent($source, $response, $valid);
}
/**
* Create a new TransportChangeEvent for $source.
*
* @param Swift_Transport $source
* @return Swift_Events_TransportChangeEvent
*/
public function createTransportChangeEvent(Swift_Transport $source)
{
return new Swift_Events_TransportChangeEvent($source);
}
/**
* Create a new TransportExceptionEvent for $source.
*
* @param Swift_Transport $source
* @param Swift_TransportException $ex
* @return Swift_Events_TransportExceptionEvent
*/
public function createTransportExceptionEvent(Swift_Transport $source,
Swift_TransportException $ex)
{
return new Swift_Events_TransportExceptionEvent($source, $ex);
}
/**
* Bind an event listener to this dispatcher.
*
* @param Swift_Events_EventListener $listener
*/
public function bindEventListener(Swift_Events_EventListener $listener)
{
foreach ($this->_listeners as $l)
{
//Already loaded
if ($l === $listener)
{
return;
}
}
$this->_listeners[] = $listener;
}
/**
* Dispatch the given Event to all suitable listeners.
*
* @param Swift_Events_EventObject $evt
* @param string $target method
*/
public function dispatchEvent(Swift_Events_EventObject $evt, $target)
{
$this->_prepareBubbleQueue($evt);
$this->_bubble($evt, $target);
}
// -- Private methods
/** Queue listeners on a stack ready for $evt to be bubbled up it */
private function _prepareBubbleQueue(Swift_Events_EventObject $evt)
{
$this->_bubbleQueue = array();
$evtClass = get_class($evt);
foreach ($this->_listeners as $listener)
{
if (array_key_exists($evtClass, $this->_eventMap)
&& ($listener instanceof $this->_eventMap[$evtClass]))
{
$this->_bubbleQueue[] = $listener;
}
}
}
/** Bubble $evt up the stack calling $target() on each listener */
private function _bubble(Swift_Events_EventObject $evt, $target)
{
if (!$evt->bubbleCancelled() && $listener = array_shift($this->_bubbleQueue))
{
$listener->$target($evt);
$this->_bubble($evt, $target);
}
}
}
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