diff -r 000000000000 -r 7f95f8617b0b vendor/swiftmailer/lib/classes/Swift/Mime/Headers/IdentificationHeader.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/swiftmailer/lib/classes/Swift/Mime/Headers/IdentificationHeader.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,166 @@
+<?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.
+ */
+
+
+/**
+ * An ID MIME Header for something like Message-ID or Content-ID.
+ * @package Swift
+ * @subpackage Mime
+ * @author Chris Corbyn
+ */
+class Swift_Mime_Headers_IdentificationHeader
+  extends Swift_Mime_Headers_AbstractHeader
+{
+  
+  /**
+   * The IDs used in the value of this Header.
+   * This may hold multiple IDs or just a single ID.
+   * @var string[]
+   * @access private
+   */
+  private $_ids = array();
+  
+  /**
+   * Creates a new IdentificationHeader with the given $name and $id.
+   * @param string $name
+   * @param Swift_Mime_Grammar $grammar
+   */
+  public function __construct($name, Swift_Mime_Grammar $grammar)
+  {
+    $this->setFieldName($name);
+    parent::__construct($grammar);
+  }
+  
+  /**
+   * Get the type of Header that this instance represents.
+   * @return int
+   * @see TYPE_TEXT, TYPE_PARAMETERIZED, TYPE_MAILBOX
+   * @see TYPE_DATE, TYPE_ID, TYPE_PATH
+   */
+  public function getFieldType()
+  {
+    return self::TYPE_ID;
+  }
+  
+  /**
+   * Set the model for the field body.
+   * This method takes a string ID, or an array of IDs
+   * @param mixed $model
+   * @throws Swift_RfcComplianceException
+   */
+  public function setFieldBodyModel($model)
+  {
+    $this->setId($model);
+  }
+  
+  /**
+   * Get the model for the field body.
+   * This method returns an array of IDs
+   * @return array
+   */
+  public function getFieldBodyModel()
+  {
+    return $this->getIds();
+  }
+  
+  /**
+   * Set the ID used in the value of this header.
+   * @param string $id
+   * @throws Swift_RfcComplianceException
+   */
+  public function setId($id)
+  {
+    $this->setIds(array($id));
+  }
+  
+  /**
+   * Get the ID used in the value of this Header.
+   * If multiple IDs are set only the first is returned.
+   * @return string
+   */
+  public function getId()
+  {
+    if (count($this->_ids) > 0)
+    {
+      return $this->_ids[0];
+    }
+  }
+  
+  /**
+   * Set a collection of IDs to use in the value of this Header.
+   * @param string[] $ids
+   * @throws Swift_RfcComplianceException
+   */
+  public function setIds(array $ids)
+  {
+    $actualIds = array();
+    
+    foreach ($ids as $k => $id)
+    {
+      $this->_assertValidId($id);
+      $actualIds[] = $id;
+    }
+    
+    $this->clearCachedValueIf($this->_ids != $actualIds);
+    $this->_ids = $actualIds;
+  }
+  
+  /**
+   * Get the list of IDs used in this Header.
+   * @return string[]
+   */
+  public function getIds()
+  {
+    return $this->_ids;
+  }
+  
+  /**
+   * Get the string value of the body in this Header.
+   * This is not necessarily RFC 2822 compliant since folding white space will
+   * not be added at this stage (see {@link toString()} for that).
+   * @return string
+   * @see toString()
+   * @throws Swift_RfcComplianceException
+   */
+  public function getFieldBody()
+  {
+    if (!$this->getCachedValue())
+    {
+      $angleAddrs = array();
+    
+      foreach ($this->_ids as $id)
+      {
+        $angleAddrs[] = '<' . $id . '>';
+      }
+    
+      $this->setCachedValue(implode(' ', $angleAddrs));
+    }
+    return $this->getCachedValue();
+  }
+  
+  /**
+   * Throws an Exception if the id passed does not comply with RFC 2822.
+   * @param string $id
+   * @throws Swift_RfcComplianceException
+   */
+  private function _assertValidId($id)
+  {
+    if (!preg_match(
+      '/^' . $this->getGrammar()->getDefinition('id-left') . '@' .
+      $this->getGrammar()->getDefinition('id-right') . '$/D',
+      $id
+      ))
+    {
+      throw new Swift_RfcComplianceException(
+        'Invalid ID given <' . $id . '>'
+        );
+    }
+  }
+}