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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);
+ }
+ }
+
+}