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<?php
/**
* The MIME_Viewer_security class is a wrapper used to load the appropriate
* MIME_Viewer for secure multipart messages (defined by RFC 1847). This
* class handles multipart/signed and multipart/encrypted data.
*
* $Horde: framework/MIME/MIME/Viewer/security.php,v 1.6.10.5 2006/01/01 21:28:25 jan Exp $
*
* Copyright 2002-2006 Michael Slusarz <slusarz@bigworm.colorado.edu>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Michael Slusarz <slusarz@bigworm.colorado.edu>
* @since Horde 3.0
* @package Horde_MIME_Viewer
*/
class MIME_Viewer_security extends MIME_Viewer {
/**
* Stores the MIME_Viewer of the specified security protocol.
*
* @var MIME_Viewer
*/
var $_viewer;
/**
* The $mime_part class variable has the information to render
* out, encapsulated in a MIME_Part object.
*
* @param $params mixed The parameters (if any) to pass to the underlying
* MIME_Viewer.
*
* @return string Rendering of the content.
*/
function render($params = array())
{
/* Get the appropriate MIME_Viewer for the protocol specified. */
if (!($this->_resolveViewer())) {
return;
}
/* Render using the loaded MIME_Viewer object. */
return $this->_viewer->render($params);
}
/**
* Returns the content-type of the Viewer used to view the part.
*
* @return string A content-type string.
*/
function getType()
{
/* Get the appropriate MIME_Viewer for the protocol specified. */
if (!($this->_resolveViewer())) {
return 'application/octet-stream';
} else {
return $this->_viewer->getType();
}
}
/**
* Load a MIME_Viewer according to the protocol parameter stored
* in the MIME_Part to render. If unsuccessful, try to load a generic
* multipart MIME_Viewer.
*
* @access private
*
* @return boolean True on success, false on failure.
*/
function _resolveViewer()
{
$viewer = null;
if (empty($this->_viewer)) {
$protocol = $this->mime_part->getContentTypeParameter('protocol');
if (empty($protocol)) {
return false;
}
$viewer = &MIME_Viewer::factory($this->mime_part, $protocol);
if (empty($viewer) ||
(String::lower(get_class($viewer)) == 'mime_viewer_default')) {
$viewer = &MIME_Viewer::factory($this->mime_part, $this->mime_part->getPrimaryType() . '/*');
if (empty($viewer)) {
return false;
}
}
$this->_viewer = $viewer;
}
return true;
}
}
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