Fix various compatibility issues with PHP 8

libs/swiftmailer/classes/Swift/Plugins/BandwidthMonitorPlugin.php

@@ -0,0 +1,164 @@
+<?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.
+ */
+
+/**
+ * Reduces network flooding when sending large amounts of mail.
+ *
+ * @author Chris Corbyn
+ */
+class Swift_Plugins_BandwidthMonitorPlugin implements Swift_Events_SendListener, Swift_Events_CommandListener, Swift_Events_ResponseListener, Swift_InputByteStream
+{
+    /**
+     * The outgoing traffic counter.
+     *
+     * @var int
+     */
+    private $_out = 0;
+
+    /**
+     * The incoming traffic counter.
+     *
+     * @var int
+     */
+    private $_in = 0;
+
+    /** Bound byte streams */
+    private $_mirrors = array();
+
+    /**
+     * Not used.
+     */
+    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)
+    {
+        $message = $evt->getMessage();
+        $message->toByteStream($this);
+    }
+
+    /**
+     * Invoked immediately following a command being sent.
+     *
+     * @param Swift_Events_CommandEvent $evt
+     */
+    public function commandSent(Swift_Events_CommandEvent $evt)
+    {
+        $command = $evt->getCommand();
+        $this->_out += strlen($command);
+    }
+
+    /**
+     * Invoked immediately following a response coming back.
+     *
+     * @param Swift_Events_ResponseEvent $evt
+     */
+    public function responseReceived(Swift_Events_ResponseEvent $evt)
+    {
+        $response = $evt->getResponse();
+        $this->_in += strlen($response);
+    }
+
+    /**
+     * Called when a message is sent so that the outgoing counter can be increased.
+     *
+     * @param string $bytes
+     */
+    public function write($bytes)
+    {
+        $this->_out += strlen($bytes);
+        foreach ($this->_mirrors as $stream) {
+            $stream->write($bytes);
+        }
+    }
+
+    /**
+     * Not used.
+     */
+    public function commit()
+    {
+    }
+
+    /**
+     * Attach $is to this stream.
+     *
+     * The stream acts as an observer, receiving all data that is written.
+     * All {@link write()} and {@link flushBuffers()} operations will be mirrored.
+     *
+     * @param Swift_InputByteStream $is
+     */
+    public function bind(Swift_InputByteStream $is)
+    {
+        $this->_mirrors[] = $is;
+    }
+
+    /**
+     * Remove an already bound stream.
+     *
+     * If $is is not bound, no errors will be raised.
+     * If the stream currently has any buffered data it will be written to $is
+     * before unbinding occurs.
+     *
+     * @param Swift_InputByteStream $is
+     */
+    public function unbind(Swift_InputByteStream $is)
+    {
+        foreach ($this->_mirrors as $k => $stream) {
+            if ($is === $stream) {
+                unset($this->_mirrors[$k]);
+            }
+        }
+    }
+
+    /**
+     * Not used.
+     */
+    public function flushBuffers()
+    {
+        foreach ($this->_mirrors as $stream) {
+            $stream->flushBuffers();
+        }
+    }
+
+    /**
+     * Get the total number of bytes sent to the server.
+     *
+     * @return int
+     */
+    public function getBytesOut()
+    {
+        return $this->_out;
+    }
+
+    /**
+     * Get the total number of bytes received from the server.
+     *
+     * @return int
+     */
+    public function getBytesIn()
+    {
+        return $this->_in;
+    }
+
+    /**
+     * Reset the internal counters to zero.
+     */
+    public function reset()
+    {
+        $this->_out = 0;
+        $this->_in = 0;
+    }
+}