Add internal fileid to webdav response

Introduce a new property "oc:fileid" to return the internal file id.

This is because the original "oc:id" property is a compound and it is
not possible to extract the real id without knowing the instance id. The
instance id is not available to external clients.

apps/dav/lib/connector/sabre/filesplugin.php

@@ -37,6 +37,7 @@ class FilesPlugin extends \Sabre\DAV\ServerPlugin {
 	// namespace
 	const NS_OWNCLOUD = 'http://owncloud.org/ns';
 	const FILEID_PROPERTYNAME = '{http://owncloud.org/ns}id';
+	const INTERNAL_FILEID_PROPERTYNAME = '{http://owncloud.org/ns}fileid';
 	const PERMISSIONS_PROPERTYNAME = '{http://owncloud.org/ns}permissions';
 	const DOWNLOADURL_PROPERTYNAME = '{http://owncloud.org/ns}downloadURL';
 	const SIZE_PROPERTYNAME = '{http://owncloud.org/ns}size';
@@ -98,6 +99,7 @@ class FilesPlugin extends \Sabre\DAV\ServerPlugin {
 
 		$server->xmlNamespaces[self::NS_OWNCLOUD] = 'oc';
 		$server->protectedProperties[] = self::FILEID_PROPERTYNAME;
+		$server->protectedProperties[] = self::INTERNAL_FILEID_PROPERTYNAME;
 		$server->protectedProperties[] = self::PERMISSIONS_PROPERTYNAME;
 		$server->protectedProperties[] = self::SIZE_PROPERTYNAME;
 		$server->protectedProperties[] = self::DOWNLOADURL_PROPERTYNAME;
@@ -175,6 +177,10 @@ class FilesPlugin extends \Sabre\DAV\ServerPlugin {
 				return $node->getFileId();
 			});
 
+			$propFind->handle(self::INTERNAL_FILEID_PROPERTYNAME, function() use ($node) {
+				return $node->getInternalFileId();
+			});
+
 			$propFind->handle(self::PERMISSIONS_PROPERTYNAME, function() use ($node) {
 				$perms = $node->getDavPermissions();
 				if ($this->isPublic) {

apps/dav/lib/connector/sabre/node.php

@@ -206,6 +206,13 @@ abstract class Node implements \Sabre\DAV\INode {
 		return null;
 	}
 
+	/**
+	 * @return string
+	 */
+	public function getInternalFileId() {
+		return $this->info->getId();
+	}
+
 	/**
 	 * @return string|null
 	 */

apps/dav/tests/unit/connector/sabre/filesplugin.php

@@ -11,6 +11,7 @@ namespace OCA\DAV\Tests\Unit\Connector\Sabre;
 class FilesPlugin extends \Test\TestCase {
 	const GETETAG_PROPERTYNAME = \OCA\DAV\Connector\Sabre\FilesPlugin::GETETAG_PROPERTYNAME;
 	const FILEID_PROPERTYNAME = \OCA\DAV\Connector\Sabre\FilesPlugin::FILEID_PROPERTYNAME;
+	const INTERNAL_FILEID_PROPERTYNAME = \OCA\DAV\Connector\Sabre\FilesPlugin::INTERNAL_FILEID_PROPERTYNAME;
 	const SIZE_PROPERTYNAME = \OCA\DAV\Connector\Sabre\FilesPlugin::SIZE_PROPERTYNAME;
 	const PERMISSIONS_PROPERTYNAME = \OCA\DAV\Connector\Sabre\FilesPlugin::PERMISSIONS_PROPERTYNAME;
 	const LASTMODIFIED_PROPERTYNAME = \OCA\DAV\Connector\Sabre\FilesPlugin::LASTMODIFIED_PROPERTYNAME;
@@ -69,7 +70,10 @@ class FilesPlugin extends \Test\TestCase {
 
 		$node->expects($this->any())
 			->method('getFileId')
-			->will($this->returnValue(123));
+			->will($this->returnValue('00000123instanceid'));
+		$node->expects($this->any())
+			->method('getInternalFileId')
+			->will($this->returnValue('123'));
 		$node->expects($this->any())
 			->method('getEtag')
 			->will($this->returnValue('"abc"'));
@@ -90,6 +94,7 @@ class FilesPlugin extends \Test\TestCase {
 			array(
 				self::GETETAG_PROPERTYNAME,
 				self::FILEID_PROPERTYNAME,
+				self::INTERNAL_FILEID_PROPERTYNAME,
 				self::SIZE_PROPERTYNAME,
 				self::PERMISSIONS_PROPERTYNAME,
 				self::DOWNLOADURL_PROPERTYNAME,
@@ -125,7 +130,8 @@ class FilesPlugin extends \Test\TestCase {
 		);
 
 		$this->assertEquals('"abc"', $propFind->get(self::GETETAG_PROPERTYNAME));
-		$this->assertEquals(123, $propFind->get(self::FILEID_PROPERTYNAME));
+		$this->assertEquals('00000123instanceid', $propFind->get(self::FILEID_PROPERTYNAME));
+		$this->assertEquals('123', $propFind->get(self::INTERNAL_FILEID_PROPERTYNAME));
 		$this->assertEquals(null, $propFind->get(self::SIZE_PROPERTYNAME));
 		$this->assertEquals('DWCKMSR', $propFind->get(self::PERMISSIONS_PROPERTYNAME));
 		$this->assertEquals('http://example.com/', $propFind->get(self::DOWNLOADURL_PROPERTYNAME));
@@ -186,7 +192,7 @@ class FilesPlugin extends \Test\TestCase {
 		);
 
 		$this->assertEquals('"abc"', $propFind->get(self::GETETAG_PROPERTYNAME));
-		$this->assertEquals(123, $propFind->get(self::FILEID_PROPERTYNAME));
+		$this->assertEquals('00000123instanceid', $propFind->get(self::FILEID_PROPERTYNAME));
 		$this->assertEquals(1025, $propFind->get(self::SIZE_PROPERTYNAME));
 		$this->assertEquals('DWCKMSR', $propFind->get(self::PERMISSIONS_PROPERTYNAME));
 		$this->assertEquals(null, $propFind->get(self::DOWNLOADURL_PROPERTYNAME));