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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/Sleeper.php';
+
+/**
+ * Reduces network flooding when sending large amounts of mail.
+ * @package Swift
+ * @subpackage Plugins
+ * @author Chris Corbyn
+ */
+class Swift_Plugins_AntiFloodPlugin
+ implements Swift_Events_SendListener, Swift_Plugins_Sleeper
+{
+
+ /**
+ * The number of emails to send before restarting Transport.
+ * @var int
+ * @access private
+ */
+ private $_threshold;
+
+ /**
+ * The number of seconds to sleep for during a restart.
+ * @var int
+ * @access private
+ */
+ private $_sleep;
+
+ /**
+ * The internal counter.
+ * @var int
+ * @access private
+ */
+ private $_counter = 0;
+
+ /**
+ * The Sleeper instance for sleeping.
+ * @var Swift_Plugins_Sleeper
+ * @access private
+ */
+ private $_sleeper;
+
+ /**
+ * Create a new AntiFloodPlugin with $threshold and $sleep time.
+ * @param int $threshold
+ * @param int $sleep time
+ * @param Swift_Plugins_Sleeper $sleeper (not needed really)
+ */
+ public function __construct($threshold = 99, $sleep = 0,
+ Swift_Plugins_Sleeper $sleeper = null)
+ {
+ $this->setThreshold($threshold);
+ $this->setSleepTime($sleep);
+ $this->_sleeper = $sleeper;
+ }
+
+ /**
+ * Set the number of emails to send before restarting.
+ * @param int $threshold
+ */
+ public function setThreshold($threshold)
+ {
+ $this->_threshold = $threshold;
+ }
+
+ /**
+ * Get the number of emails to send before restarting.
+ * @return int
+ */
+ public function getThreshold()
+ {
+ return $this->_threshold;
+ }
+
+ /**
+ * Set the number of seconds to sleep for during a restart.
+ * @param int $sleep time
+ */
+ public function setSleepTime($sleep)
+ {
+ $this->_sleep = $sleep;
+ }
+
+ /**
+ * Get the number of seconds to sleep for during a restart.
+ * @return int
+ */
+ public function getSleepTime()
+ {
+ return $this->_sleep;
+ }
+
+ /**
+ * Invoked immediately before the Message is sent.
+ * @param Swift_Events_SendEvent $evt
+ */
+ public function beforeSendPerformed(Swift_Events_SendEvent $evt)
+ {
+ }
+
+ /**
+ * Invoked immediately after the Message is sent.
+ * @param Swift_Events_SendEvent $evt
+ */
+ public function sendPerformed(Swift_Events_SendEvent $evt)
+ {
+ ++$this->_counter;
+ if ($this->_counter >= $this->_threshold)
+ {
+ $transport = $evt->getTransport();
+ $transport->stop();
+ if ($this->_sleep)
+ {
+ $this->sleep($this->_sleep);
+ }
+ $transport->start();
+ $this->_counter = 0;
+ }
+ }
+
+ /**
+ * Sleep for $seconds.
+ * @param int $seconds
+ */
+ public function sleep($seconds)
+ {
+ if (isset($this->_sleeper))
+ {
+ $this->_sleeper->sleep($seconds);
+ }
+ else
+ {
+ sleep($seconds);
+ }
+ }
+
+}