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<?php
/**
* OpenDD over Atom PHP Library.
* Provides Atom wrappers for
*
* @package Elgg
* @subpackage Core
* @license http://www.gnu.org/licenses/old-licenses/gpl-2.0.html GNU Public License version 2
* @author Marcus Povey
* @version 0.1
* @copyright Curverider Ltd 2008
* @link http://elgg.org/
*/
include_once("opendd.php");
/**
* A Wrapper Factory which Constructs a wrapper appropriate for drawing
* ODD elements as Atom.
*/
class ODDAtomWrapperFactory extends ODDWrapperFactory
{
function getElementWrapper($element)
{
if ($element instanceof ODDDocument)
return new ODDAtomDocumentWrapper();
if ($element instanceof ODDEntity)
return new ODDAtomEntityWrapper();
if ($element instanceof ODDMetaData)
return new ODDAtomMetaDataWrapper();
if ($element instanceof ODDRelationship)
return new ODDAtomRelationshipWrapper();
throw new DataFormatException("Element could not be wrapped.");
}
}
/**
* Atom document wrapper
*/
class ODDAtomDocumentWrapper extends ODDDocumentWrapper
{
function wrap($element)
{
global $CONFIG;
$wrapped = "";
// Sanity check
if (!($element instanceof ODDDocument))
throw new DataFormatException("Element being wrapped is not an ODDDocument");
// Create a factory
$factory = new ODDAtomWrapperFactory();
// Head
$wrapped .= "<feed>\n";
$wrapped .= "<id>".urlencode(current_page_url())."</id>\n";
$wrapped .= "<updated>".date(DATE_ATOM)."</updated>\n";
$wrapped .= "<author><name>".$_SESSION['user']->name."</name></author>\n";
$wrapped .= "<title>OpenDD-over-Atom feed</title>\n";
// Itterate
foreach ($element as $e)
{
$wrapper = $factory->getElementWrapper($e);
$wrapped .= $wrapper->wrap($e);
}
// Tail
$wrapped .= "</feed>\n";
return $wrapped;
}
}
/**
* Atom entity wrapper
*/
class ODDAtomEntityWrapper extends ODDEntityWrapper
{
function wrap($element)
{
$wrapped = "";
// Sanity check
if (!($element instanceof ODDEntity))
throw new DataFormatException("Element being wrapped is not an ODDEntity");
$wrapped .= "<entry>\n";
$wrapped .= "<id>".$element->getAttribute('uuid')."?view=atom"."</id>\n";
$wrapped .= "<published>".date(DATE_ATOM)."</published>\n";
$wrapped .= "<title>Entity</title>\n";
$wrapped .= "<author><name>".$_SESSION['user']->name."</name></author>\n";
$wrapped .= "<content type=\"text/xml\">\n";
$wrapped .= "$element\n";
$wrapped .= "</content>\n";
$wrapped .= "</entry>\n";
return $wrapped;
}
}
/**
* Atom metadata wrapper
*/
class ODDAtomMetaDataWrapper extends ODDMetaDataWrapper
{
function wrap($element)
{
$wrapped = "";
// Sanity check
if (!($element instanceof ODDMetaData))
throw new DataFormatException("Element being wrapped is not an ODDMetaData");
$wrapped .= "<entry>\n";
$wrapped .= "<id>".$element->getAttribute('uuid')."?view=atom"."</id>\n";
$wrapped .= "<published>".date(DATE_ATOM)."</published>\n";
$wrapped .= "<title>Entity</title>\n";
$wrapped .= "<author><name>".$_SESSION['user']->name."</name></author>\n";
$wrapped .= "<content type=\"text/xml\">\n";
$wrapped .= "$element\n";
$wrapped .= "</content>\n";
$wrapped .= "</entry>\n";
return $wrapped;
}
}
/**
* Atom Relationship wrapper.
*/
class ODDAtomRelationshipWrapper extends ODDRelationshipWrapper
{
function wrap($element)
{
$wrapped = "";
// Sanity check
if (!($element instanceof ODDRelationship))
throw new DataFormatException("Element being wrapped is not an ODDRelationship");
$wrapped .= "<entry>\n";
$wrapped .= "<id></id>\n";
$wrapped .= "<published>".date(DATE_ATOM)."</published>\n";
$wrapped .= "<title>Entity</title>\n";
$wrapped .= "<author><name>".$_SESSION['user']->name."</name></author>\n";
$wrapped .= "<content type=\"text/xml\">\n";
$wrapped .= "$element\n";
$wrapped .= "</content>\n";
$wrapped .= "</entry>\n";
return $wrapped;
}
}
?>
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