Fix various compatibility issues with PHP 8

libs/swiftmailer/classes/Swift/Transport/SpoolTransport.php

@@ -0,0 +1,117 @@
+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2009 Fabien Potencier <fabien.potencier@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * Stores Messages in a queue.
+ *
+ * @author Fabien Potencier
+ */
+class Swift_Transport_SpoolTransport implements Swift_Transport
+{
+    /** The spool instance */
+    private $_spool;
+
+    /** The event dispatcher from the plugin API */
+    private $_eventDispatcher;
+
+    /**
+     * Constructor.
+     */
+    public function __construct(Swift_Events_EventDispatcher $eventDispatcher, Swift_Spool $spool = null)
+    {
+        $this->_eventDispatcher = $eventDispatcher;
+        $this->_spool = $spool;
+    }
+
+    /**
+     * Sets the spool object.
+     *
+     * @param Swift_Spool $spool
+     *
+     * @return $this
+     */
+    public function setSpool(Swift_Spool $spool)
+    {
+        $this->_spool = $spool;
+
+        return $this;
+    }
+
+    /**
+     * Get the spool object.
+     *
+     * @return Swift_Spool
+     */
+    public function getSpool()
+    {
+        return $this->_spool;
+    }
+
+    /**
+     * Tests if this Transport mechanism has started.
+     *
+     * @return bool
+     */
+    public function isStarted()
+    {
+        return true;
+    }
+
+    /**
+     * Starts this Transport mechanism.
+     */
+    public function start()
+    {
+    }
+
+    /**
+     * Stops this Transport mechanism.
+     */
+    public function stop()
+    {
+    }
+
+    /**
+     * Sends the given message.
+     *
+     * @param Swift_Mime_Message $message
+     * @param string[]           $failedRecipients An array of failures by-reference
+     *
+     * @return int The number of sent e-mail's
+     */
+    public function send(Swift_Mime_Message $message, &$failedRecipients = null)
+    {
+        if ($evt = $this->_eventDispatcher->createSendEvent($this, $message)) {
+            $this->_eventDispatcher->dispatchEvent($evt, 'beforeSendPerformed');
+            if ($evt->bubbleCancelled()) {
+                return 0;
+            }
+        }
+
+        $success = $this->_spool->queueMessage($message);
+
+        if ($evt) {
+            $evt->setResult($success ? Swift_Events_SendEvent::RESULT_SPOOLED : Swift_Events_SendEvent::RESULT_FAILED);
+            $this->_eventDispatcher->dispatchEvent($evt, 'sendPerformed');
+        }
+
+        return 1;
+    }
+
+    /**
+     * Register a plugin.
+     *
+     * @param Swift_Events_EventListener $plugin
+     */
+    public function registerPlugin(Swift_Events_EventListener $plugin)
+    {
+        $this->_eventDispatcher->bindEventListener($plugin);
+    }
+}