From 07f5140771388c9e0c8a99b0dd2e5d950bdb173b Mon Sep 17 00:00:00 2001
From: Yuchen Pei <hi@ypei.me>
Date: Thu, 14 Oct 2021 15:16:42 +1100
Subject: moving h-source subdir out.

---
 .../classes/Swift/Transport/FailoverTransport.php  | 97 ++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100755 External/swiftmailer/lib/classes/Swift/Transport/FailoverTransport.php

(limited to 'External/swiftmailer/lib/classes/Swift/Transport/FailoverTransport.php')

diff --git a/External/swiftmailer/lib/classes/Swift/Transport/FailoverTransport.php b/External/swiftmailer/lib/classes/Swift/Transport/FailoverTransport.php
new file mode 100755
index 0000000..e62491c
--- /dev/null
+++ b/External/swiftmailer/lib/classes/Swift/Transport/FailoverTransport.php
@@ -0,0 +1,97 @@
+<?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/Transport/LoadBalancedTransport.php';
+//@require 'Swift/Mime/Message.php';
+
+/**
+ * Contains a list of redundant Transports so when one fails, the next is used.
+ * @package Swift
+ * @subpackage Transport
+ * @author Chris Corbyn
+ */
+class Swift_Transport_FailoverTransport
+  extends Swift_Transport_LoadBalancedTransport
+{
+  
+  /**
+   * Registered transport curently used.
+   * @var Swift_Transport
+   * @access private
+   */
+  private $_currentTransport;
+  
+  /**
+   * Creates a new FailoverTransport.
+   */
+  public function __construct()
+  {
+    parent::__construct();
+  }
+  
+  /**
+   * Send the given Message.
+   * Recipient/sender data will be retreived from the Message API.
+   * The return value is the number of recipients who were accepted for delivery.
+   * @param Swift_Mime_Message $message
+   * @param string[] &$failedRecipients to collect failures by-reference
+   * @return int
+   */
+  public function send(Swift_Mime_Message $message, &$failedRecipients = null)
+  {
+    $maxTransports = count($this->_transports);
+    $sent = 0;
+    
+    for ($i = 0; $i < $maxTransports
+      && $transport = $this->_getNextTransport(); ++$i)
+    {
+      try
+      {
+        if (!$transport->isStarted())
+        {
+          $transport->start();
+        }
+        
+        return $transport->send($message, $failedRecipients);
+      }
+      catch (Swift_TransportException $e)
+      {
+        $this->_killCurrentTransport();
+      }
+    }
+    
+    if (count($this->_transports) == 0)
+    {
+      throw new Swift_TransportException(
+        'All Transports in FailoverTransport failed, or no Transports available'
+        );
+    }
+    
+    return $sent;
+  }
+  
+  // -- Protected methods
+  
+  protected function _getNextTransport()
+  {
+    if (!isset($this->_currentTransport))
+    {
+      $this->_currentTransport = parent::_getNextTransport();
+    }
+    return $this->_currentTransport;
+  }
+  
+  protected function _killCurrentTransport()
+  {
+    $this->_currentTransport = null;
+    parent::_killCurrentTransport();
+  }
+  
+}
-- 
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