From 9caa09ee888d7884e22cc46089e6e0fb6579732c Mon Sep 17 00:00:00 2001
From: icewing <icewing@36083f99-b078-4883-b0ff-0f9b5a30f544>
Date: Tue, 20 May 2008 11:38:25 +0000
Subject: Marcus Povey <marcus@dushka.co.uk> * Committed abortive Atom
 wrapper... we need to support different import/export

git-svn-id: https://code.elgg.org/elgg/trunk@657 36083f99-b078-4883-b0ff-0f9b5a30f544
---
 engine/lib/atom.php | 170 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 170 insertions(+)
 create mode 100644 engine/lib/atom.php

(limited to 'engine/lib/atom.php')

diff --git a/engine/lib/atom.php b/engine/lib/atom.php
new file mode 100644
index 000000000..684ae0946
--- /dev/null
+++ b/engine/lib/atom.php
@@ -0,0 +1,170 @@
+<?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;
+		}
+	}
+?>
\ No newline at end of file
-- 
cgit v1.2.3