introducing new dav property {xmlns:oc="http://owncloud.org/ns}id

apps/files/appinfo/remote.php

@@ -48,6 +48,7 @@ $defaults = new OC_Defaults();
 $server->addPlugin(new Sabre_DAV_Auth_Plugin($authBackend, $defaults->getName()));
 $server->addPlugin(new Sabre_DAV_Locks_Plugin($lockBackend));
 $server->addPlugin(new Sabre_DAV_Browser_Plugin(false)); // Show something in the Browser, but no upload
+$server->addPlugin(new OC_Connector_Sabre_FilesPlugin());
 $server->addPlugin(new OC_Connector_Sabre_AbortedUploadDetectionPlugin());
 $server->addPlugin(new OC_Connector_Sabre_QuotaPlugin());
 $server->addPlugin(new OC_Connector_Sabre_MaintenancePlugin());

lib/private/connector/sabre/filesplugin.php

@@ -0,0 +1,68 @@
+<?php
+
+/**
+ * ownCloud
+ *
+ * @author Thomas Müller
+ * @copyright 2013 Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @license AGPL3
+ */
+
+class OC_Connector_Sabre_FilesPlugin extends Sabre_DAV_ServerPlugin
+{
+
+	// namespace
+	const NS_OWNCLOUD = 'xmlns:oc="http://owncloud.org/ns';
+
+	/**
+	 * Reference to main server object
+	 *
+	 * @var Sabre_DAV_Server
+	 */
+	private $server;
+
+	/**
+	 * This initializes the plugin.
+	 *
+	 * This function is called by Sabre_DAV_Server, after
+	 * addPlugin is called.
+	 *
+	 * This method should set up the required event subscriptions.
+	 *
+	 * @param Sabre_DAV_Server $server
+	 * @return void
+	 */
+	public function initialize(Sabre_DAV_Server $server) {
+
+		$server->xmlNamespaces[self::NS_OWNCLOUD] = 'oc';
+		$server->protectedProperties[] = '{' . self::NS_OWNCLOUD . '}id';
+
+		$this->server = $server;
+		$this->server->subscribeEvent('beforeGetProperties', array($this, 'beforeGetProperties'));
+	}
+
+	/**
+	 * Adds all ownCloud-specific properties
+	 *
+	 * @param string $path
+	 * @param Sabre_DAV_INode $node
+	 * @param array $requestedProperties
+	 * @param array $returnedProperties
+	 * @return void
+	 */
+	public function beforeGetProperties($path, Sabre_DAV_INode $node, array &$requestedProperties, array &$returnedProperties) {
+
+		if ($node instanceof OC_Connector_Sabre_Node) {
+
+			$fileid_propertyname = '{' . self::NS_OWNCLOUD . '}id';
+			unset($requestedProperties[array_search($fileid_propertyname, $requestedProperties)]);
+
+			/** @var $node OC_Connector_Sabre_Node */
+			$returnedProperties[200][$fileid_propertyname] = $node->getFileId();
+
+		}
+
+	}
+
+}

lib/private/connector/sabre/node.php

@@ -45,6 +45,7 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 	 * @var string
 	 */
 	protected $path;
+
 	/**
 	 * node fileinfo cache
 	 * @var array
@@ -211,6 +212,7 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 	 * properties should be returned
 	 */
 	public function getProperties($properties) {
+
 		if (is_null($this->property_cache)) {
 			$sql = 'SELECT * FROM `*PREFIX*properties` WHERE `userid` = ? AND `propertypath` = ?';
 			$result = OC_DB::executeAudited( $sql, array( OC_User::getUser(), $this->path ) );
@@ -236,8 +238,11 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 
 		$props = array();
 		foreach($properties as $property) {
-			if (isset($this->property_cache[$property])) $props[$property] = $this->property_cache[$property];
+			if (isset($this->property_cache[$property])) {
+				$props[$property] = $this->property_cache[$property];
+			}
 		}
+
 		return $props;
 	}
 
@@ -260,4 +265,15 @@ abstract class OC_Connector_Sabre_Node implements Sabre_DAV_INode, Sabre_DAV_IPr
 		}
 		return $this->fileView;
 	}
+
+	/**
+	 * @return mixed
+	 */
+	public function getFileId()
+	{
+		$this->getFileinfoCache();
+		$instanceId = OC_Util::getInstanceId();
+		$id = sprintf('%08d', $this->fileinfo_cache['fileid']);
+		return $instanceId . $id;
+	}
 }