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diff --git a/h-source/External/swiftmailer/lib/classes/Swift/KeyCache/ArrayKeyCache.php b/h-source/External/swiftmailer/lib/classes/Swift/KeyCache/ArrayKeyCache.php
new file mode 100644
index 0000000..fe3b7c9
--- /dev/null
+++ b/h-source/External/swiftmailer/lib/classes/Swift/KeyCache/ArrayKeyCache.php
@@ -0,0 +1,209 @@
+<?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/KeyCache.php';
+//@require 'Swift/KeyCacheInputStream.php';
+//@require 'Swift/InputByteStream.php';
+//@require 'Swift/OutputByteStrean.php';
+//@require 'Swift/SwiftException.php';
+
+/**
+ * A basic KeyCache backed by an array.
+ * @package Swift
+ * @subpackage KeyCache
+ * @author Chris Corbyn
+ */
+class Swift_KeyCache_ArrayKeyCache implements Swift_KeyCache
+{
+  
+  /**
+   * Cache contents.
+   * @var array
+   * @access private
+   */
+  private $_contents = array();
+  
+  /**
+   * An InputStream for cloning.
+   * @var Swift_KeyCache_KeyCacheInputStream
+   * @access private
+   */
+  private $_stream;
+  
+  /**
+   * Create a new ArrayKeyCache with the given $stream for cloning to make
+   * InputByteStreams.
+   * @param Swift_KeyCache_KeyCacheInputStream $stream
+   */
+  public function __construct(Swift_KeyCache_KeyCacheInputStream $stream)
+  {
+    $this->_stream = $stream;
+  }
+  
+  /**
+   * Set a string into the cache under $itemKey for the namespace $nsKey.
+   * @param string $nsKey
+   * @param string $itemKey
+   * @param string $string
+   * @param int $mode
+   * @see MODE_WRITE, MODE_APPEND
+   */
+  public function setString($nsKey, $itemKey, $string, $mode)
+  {
+    $this->_prepareCache($nsKey);
+    switch ($mode)
+    {
+      case self::MODE_WRITE:
+        $this->_contents[$nsKey][$itemKey] = $string;
+        break;
+      case self::MODE_APPEND:
+        if (!$this->hasKey($nsKey, $itemKey))
+        {
+          $this->_contents[$nsKey][$itemKey] = '';
+        }
+        $this->_contents[$nsKey][$itemKey] .= $string;
+        break;
+      default:
+        throw new Swift_SwiftException(
+          'Invalid mode [' . $mode . '] used to set nsKey='.
+          $nsKey . ', itemKey=' . $itemKey
+          );
+    }
+  }
+  
+  /**
+   * Set a ByteStream into the cache under $itemKey for the namespace $nsKey.
+   * @param string $nsKey
+   * @param string $itemKey
+   * @param Swift_OutputByteStream $os
+   * @param int $mode
+   * @see MODE_WRITE, MODE_APPEND
+   */
+  public function importFromByteStream($nsKey, $itemKey, Swift_OutputByteStream $os,
+    $mode)
+  {
+    $this->_prepareCache($nsKey);
+    switch ($mode)
+    {
+      case self::MODE_WRITE:
+        $this->clearKey($nsKey, $itemKey);
+      case self::MODE_APPEND:
+        if (!$this->hasKey($nsKey, $itemKey))
+        {
+          $this->_contents[$nsKey][$itemKey] = '';
+        }
+        while (false !== $bytes = $os->read(8192))
+        {
+          $this->_contents[$nsKey][$itemKey] .= $bytes;
+        }
+        break;
+      default:
+        throw new Swift_SwiftException(
+          'Invalid mode [' . $mode . '] used to set nsKey='.
+          $nsKey . ', itemKey=' . $itemKey
+          );
+    }
+  }
+  
+  /**
+   * Provides a ByteStream which when written to, writes data to $itemKey.
+   * NOTE: The stream will always write in append mode.
+   * @param string $nsKey
+   * @param string $itemKey
+   * @return Swift_InputByteStream
+   */
+  public function getInputByteStream($nsKey, $itemKey,
+    Swift_InputByteStream $writeThrough = null)
+  {
+    $is = clone $this->_stream;
+    $is->setKeyCache($this);
+    $is->setNsKey($nsKey);
+    $is->setItemKey($itemKey);
+    if (isset($writeThrough))
+    {
+      $is->setWriteThroughStream($writeThrough);
+    }
+    return $is;
+  }
+  
+  /**
+   * Get data back out of the cache as a string.
+   * @param string $nsKey
+   * @param string $itemKey
+   * @return string
+   */
+  public function getString($nsKey, $itemKey)
+  {
+    $this->_prepareCache($nsKey);
+    if ($this->hasKey($nsKey, $itemKey))
+    {
+      return $this->_contents[$nsKey][$itemKey];
+    }
+  }
+  
+  /**
+   * Get data back out of the cache as a ByteStream.
+   * @param string $nsKey
+   * @param string $itemKey
+   * @param Swift_InputByteStream $is to write the data to
+   */
+  public function exportToByteStream($nsKey, $itemKey, Swift_InputByteStream $is)
+  {
+    $this->_prepareCache($nsKey);
+    $is->write($this->getString($nsKey, $itemKey));
+  }
+  
+  /**
+   * Check if the given $itemKey exists in the namespace $nsKey.
+   * @param string $nsKey
+   * @param string $itemKey
+   * @return boolean
+   */
+  public function hasKey($nsKey, $itemKey)
+  {
+    $this->_prepareCache($nsKey);
+    return array_key_exists($itemKey, $this->_contents[$nsKey]);
+  }
+  
+  /**
+   * Clear data for $itemKey in the namespace $nsKey if it exists.
+   * @param string $nsKey
+   * @param string $itemKey
+   */
+  public function clearKey($nsKey, $itemKey)
+  {
+    unset($this->_contents[$nsKey][$itemKey]);
+  }
+  
+  /**
+   * Clear all data in the namespace $nsKey if it exists.
+   * @param string $nsKey
+   */
+  public function clearAll($nsKey)
+  {
+    unset($this->_contents[$nsKey]);
+  }
+  
+  // -- Private methods
+  
+  /**
+   * Initialize the namespace of $nsKey if needed.
+   * @param string $nsKey
+   * @access private
+   */
+  private function _prepareCache($nsKey)
+  {
+    if (!array_key_exists($nsKey, $this->_contents))
+    {
+      $this->_contents[$nsKey] = array();
+    }
+  }
+  
+}