Merge branch 'unstable'

Conflicts:
	apps/files_external/tests/config.php
	apps/files_versions/ajax/getVersions.php
	apps/files_versions/appinfo/app.php
	apps/files_versions/history.php
	apps/files_versions/js/versions.js
	apps/files_versions/templates/history.php
	apps/files_versions/versions.php
	lib/base.php

15 files changed, 298 insertions, 109 deletions

diff --git a/lib/app.php b/lib/app.php
index 17e0e479031..667633e2647 100755
--- a/lib/app.php
+++ b/lib/app.php
@@ -61,6 +61,14 @@ class OC_App{
 		}
 		ob_end_clean();
 
+		if (!defined('DEBUG') || !DEBUG){
+			if (is_null($types)) {
+				OC_Util::$core_scripts = OC_Util::$scripts;
+				OC_Util::$scripts = array();
+				OC_Util::$core_styles = OC_Util::$styles;
+				OC_Util::$styles = array();
+			}
+		}
 		// return
 		return true;
 	}
diff --git a/lib/base.php b/lib/base.php
index e6fcb9ec4de..bdfd05e8f1d 100644
--- a/lib/base.php
+++ b/lib/base.php
@@ -31,17 +31,13 @@ class OC{
 	 */
 	public static $CLASSPATH = array();
 	/**
-	 * $_SERVER['DOCUMENTROOT'] but without symlinks
-	 */
-	public static $DOCUMENTROOT = '';
-	/**
 	 * The installation path for owncloud on the server (e.g. /srv/http/owncloud)
 	 */
 	public static $SERVERROOT = '';
 	/**
 	 * the current request path relative to the owncloud root (e.g. files/index.php)
 	 */
-	public static $SUBURI = '';
+	private static $SUBURI = '';
 	/**
 	 * the owncloud root path for http requests (e.g. owncloud/)
 	 */
@@ -51,10 +47,6 @@ class OC{
 	 */
 	public static $CONFIG_DATADIRECTORY = '';
 	/**
-	 * the folder that stores the data for the root filesystem (e.g. /srv/http/owncloud/data)
-	 */
-	public static $CONFIG_DATADIRECTORY_ROOT = '';
-	/**
 	 * The installation path of the 3rdparty folder on the server (e.g. /srv/http/owncloud/3rdparty)
 	 */
 	public static $THIRDPARTYROOT = '';
@@ -130,7 +122,7 @@ class OC{
 
 	public static function initPaths(){
 		// calculate the documentroot
-		OC::$DOCUMENTROOT=realpath($_SERVER['DOCUMENT_ROOT']);
+		$DOCUMENTROOT=realpath($_SERVER['DOCUMENT_ROOT']);
 		OC::$SERVERROOT=str_replace("\\",'/',substr(__FILE__,0,-13));
 		OC::$SUBURI=substr(realpath($_SERVER["SCRIPT_FILENAME"]),strlen(OC::$SERVERROOT));
 		$scriptName=$_SERVER["SCRIPT_NAME"];
@@ -146,7 +138,7 @@ class OC{
 		}
                 OC::$WEBROOT=substr($scriptName,0,strlen($scriptName)-strlen(OC::$SUBURI));
 		// try a new way to detect the WEBROOT which is simpler and also works with the app directory outside the owncloud folder. let´s see if this works for everybody
-//		OC::$WEBROOT=substr(OC::$SERVERROOT,strlen(OC::$DOCUMENTROOT));
+//		OC::$WEBROOT=substr(OC::$SERVERROOT,strlen($DOCUMENTROOT));
 
 
 		if(OC::$WEBROOT!='' and OC::$WEBROOT[0]!=='/'){
@@ -243,6 +235,9 @@ class OC{
 				OC_Config::setValue('version',implode('.',OC_Util::getVersion()));
 			}
 
+			OC_AppConfig::setValue('core', 'remote_core.css', '/core/minimizer.php');
+			OC_AppConfig::setValue('core', 'remote_core.js', '/core/minimizer.php');
+
 			OC_App::updateApps();
 		}
 	}
@@ -291,18 +286,9 @@ class OC{
 	public static function loadfile(){
 		if(file_exists(OC::$APPSROOT . '/apps/' . OC::$REQUESTEDAPP . '/' . OC::$REQUESTEDFILE)){
 			if(substr(OC::$REQUESTEDFILE, -3) == 'css'){
-				$appswebroot = (string) OC::$APPSWEBROOT;
-				$webroot = (string) OC::$WEBROOT;
-				$filepath = OC::$APPSROOT . '/apps/' . OC::$REQUESTEDAPP . '/' . OC::$REQUESTEDFILE;
-				header('Content-Type: text/css');
-				OC_Response::enableCaching();
-				OC_Response::setLastModifiedHeader(filemtime($filepath));
-				$cssfile = file_get_contents($filepath);
-				$cssfile = str_replace('%appswebroot%', $appswebroot, $cssfile);
-				$cssfile = str_replace('%webroot%', $webroot, $cssfile);
-				OC_Response::setETagHeader(md5($cssfile));
-				header('Content-Length: '.strlen($cssfile));
-				echo $cssfile;
+				$file = 'apps/' . OC::$REQUESTEDAPP . '/' . OC::$REQUESTEDFILE;
+				$minimizer = new OC_Minimizer_CSS();
+				$minimizer->output(array(array(OC::$APPSROOT, OC::$APPSWEBROOT, $file)));
 				exit;
 			}elseif(substr(OC::$REQUESTEDFILE, -3) == 'php'){
 				require_once(OC::$APPSROOT . '/apps/' . OC::$REQUESTEDAPP . '/' . OC::$REQUESTEDFILE);
diff --git a/lib/filesystem.php b/lib/filesystem.php
index 6b3c254c5e9..84d45f5f24b 100644
--- a/lib/filesystem.php
+++ b/lib/filesystem.php
@@ -290,8 +290,10 @@ class OC_Filesystem{
 	}
 
 	/**
-	 * get the fake root
+	 * @brief get the relative path of the root data directory for the current user
 	 * @return string
+	 *
+	 * Returns path like /admin/files
 	 */
 	static public function getRoot(){
 		return self::$defaultInstance->getRoot();
diff --git a/lib/group.php b/lib/group.php
index 7967e1a581b..ceee5fa4edb 100644
--- a/lib/group.php
+++ b/lib/group.php
@@ -84,7 +84,7 @@ class OC_Group {
 		OC_Hook::emit( "OC_Group", "pre_createGroup", array( "run" => &$run, "gid" => $gid ));
 
 		if($run){
-			//create the user in the first backend that supports creating users
+			//create the group in the first backend that supports creating groups
 			foreach(self::$_usedBackends as $backend){
 				if(!$backend->implementsActions(OC_GROUP_BACKEND_CREATE_GROUP))
 					continue;
@@ -141,9 +141,6 @@ class OC_Group {
 	 */
 	public static function inGroup( $uid, $gid ){
 		foreach(self::$_usedBackends as $backend){
-			if(!$backend->implementsActions(OC_GROUP_BACKEND_IN_GROUP))
-				continue;
-
 			if($backend->inGroup($uid,$gid)){
 				return true;
 			}
@@ -228,9 +225,6 @@ class OC_Group {
 	public static function getUserGroups( $uid ){
 		$groups=array();
 		foreach(self::$_usedBackends as $backend){
-			if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_USER_GROUPS))
-				continue;
-
 			$groups=array_merge($backend->getUserGroups($uid),$groups);
 		}
 		asort($groups);
@@ -246,9 +240,6 @@ class OC_Group {
 	public static function getGroups(){
 		$groups=array();
 		foreach(self::$_usedBackends as $backend){
-			if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_GROUPS))
-				continue;
-
 			$groups=array_merge($backend->getGroups(),$groups);
 		}
 		asort($groups);
@@ -276,9 +267,6 @@ class OC_Group {
 	public static function usersInGroup($gid){
 		$users=array();
 		foreach(self::$_usedBackends as $backend){
-			if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_USERS))
-				continue;
-
 			$users=array_merge($backend->usersInGroup($gid),$users);
 		}
 		return $users;
diff --git a/lib/group/backend.php b/lib/group/backend.php
index 3b652599462..1b0b663f2ed 100644
--- a/lib/group/backend.php
+++ b/lib/group/backend.php
@@ -31,12 +31,8 @@ define('OC_GROUP_BACKEND_NOT_IMPLEMENTED',   -501);
  */
 define('OC_GROUP_BACKEND_CREATE_GROUP',      0x00000001);
 define('OC_GROUP_BACKEND_DELETE_GROUP',      0x00000010);
-define('OC_GROUP_BACKEND_IN_GROUP',          0x00000100);
-define('OC_GROUP_BACKEND_ADD_TO_GROUP',      0x00001000);
-define('OC_GROUP_BACKEND_REMOVE_FROM_GOUP',  0x00010000);
-define('OC_GROUP_BACKEND_GET_USER_GROUPS',   0x00100000);
-define('OC_GROUP_BACKEND_GET_USERS',         0x01000000);
-define('OC_GROUP_BACKEND_GET_GROUPS',        0x10000000);
+define('OC_GROUP_BACKEND_ADD_TO_GROUP',      0x00000100);
+define('OC_GROUP_BACKEND_REMOVE_FROM_GOUP',  0x00001000);
 
 /**
  * Abstract base class for user management
@@ -45,12 +41,8 @@ abstract class OC_Group_Backend {
 	protected $possibleActions = array(
 		OC_GROUP_BACKEND_CREATE_GROUP => 'createGroup',
 		OC_GROUP_BACKEND_DELETE_GROUP => 'deleteGroup',
-		OC_GROUP_BACKEND_IN_GROUP => 'inGroup',
 		OC_GROUP_BACKEND_ADD_TO_GROUP => 'addToGroup',
 		OC_GROUP_BACKEND_REMOVE_FROM_GOUP => 'removeFromGroup',
-		OC_GROUP_BACKEND_GET_USER_GROUPS => 'getUserGroups',
-		OC_GROUP_BACKEND_GET_USERS => 'usersInGroup',
-		OC_GROUP_BACKEND_GET_GROUPS => 'getGroups'
 	);
 	
 	/**
@@ -84,14 +76,54 @@ abstract class OC_Group_Backend {
 	}
 
 	/**
+	 * @brief is user in group?
+	 * @param $uid uid of the user
+	 * @param $gid gid of the group
+	 * @returns true/false
+	 *
+	 * Checks whether the user is member of a group or not.
+	 */
+	public static function inGroup($uid, $gid){
+		return in_array($gid, $this->getUserGroups($uid));
+	}
+
+	/**
+	 * @brief Get all groups a user belongs to
+	 * @param $uid Name of the user
+	 * @returns array with group names
+	 *
+	 * This function fetches all groups a user belongs to. It does not check
+	 * if the user exists at all.
+	 */
+	public static function getUserGroups($uid){
+		return array();
+	}
+
+	/**
+	 * @brief get a list of all groups
+	 * @returns array with group names
+	 *
+	 * Returns a list with all groups
+	 */
+	public static function getGroups(){
+		return array();
+	}
+
+	/**
 	 * check if a group exists
 	 * @param string $gid
 	 * @return bool
 	 */
 	public function groupExists($gid){
-		if(!$this->implementsActions(OC_GROUP_BACKEND_GET_GROUPS)){
-			return false;
-		}
 		return in_array($gid, $this->getGroups());
 	}
+
+	/**
+	 * @brief get a list of all users in a group
+	 * @returns array with user ids
+	 */
+	public static function usersInGroup($gid){
+		return array();
+	}
+
 }
diff --git a/lib/group/example.php b/lib/group/example.php
index b2de119553c..c18562db7a4 100644
--- a/lib/group/example.php
+++ b/lib/group/example.php
@@ -94,6 +94,13 @@ abstract class OC_Group_Example {
 	public static function getGroups(){}
 
 	/**
+	 * check if a group exists
+	 * @param string $gid
+	 * @return bool
+	 */
+	public function groupExists($gid){}
+
+	/**
 	 * @brief get a list of all users in a group
 	 * @returns array with user ids
 	 */
diff --git a/lib/helper.php b/lib/helper.php
index f8f84b91ae3..aedac204058 100644
--- a/lib/helper.php
+++ b/lib/helper.php
@@ -131,8 +131,8 @@ class OC_Helper {
 	 *
 	 * Returns a absolute url to the given service.
 	 */
-	public static function linkToRemote( $service ) {
-		return self::linkToAbsolute( '', 'remote.php') . '/' . $service . '/';
+	public static function linkToRemote( $service, $add_slash = true ) {
+		return self::linkToAbsolute( '', 'remote.php') . '/' . $service . ($add_slash?'/':'');
 	}
 
 	/**
diff --git a/lib/minimizer.php b/lib/minimizer.php
new file mode 100644
index 00000000000..9f9ef086c4a
--- /dev/null
+++ b/lib/minimizer.php
@@ -0,0 +1,40 @@
+<?php
+
+abstract class OC_Minimizer
+{
+	protected $files = array();
+
+	protected function appendIfExist($root, $webroot, $file) {
+                if (is_file($root.'/'.$file)) {
+			$this->files[] = array($root, $webroot, $file);
+                        return true;
+                }
+                return false;
+	}
+
+	public function getLastModified($files) {
+		$last_modified = 0;
+		foreach($files as $file_info) {
+			$file = $file_info[0] . '/' . $file_info[2];
+			$filemtime = filemtime($file);
+			if ($filemtime > $last_modified) {
+				$last_modified = $filemtime;
+			}
+		}
+		return $last_modified;
+	}
+
+	abstract public function minimizeFiles($files);
+
+	public function output($files) {
+		header('Content-Type: '.$this->contentType);
+		OC_Response::enableCaching();
+		$last_modified = $this->getLastModified($files);
+		OC_Response::setLastModifiedHeader($last_modified);
+
+		$out = $this->minimizeFiles($files);
+		OC_Response::setETagHeader(md5($out));
+		header('Content-Length: '.strlen($out));
+		echo $out;
+	}
+}
diff --git a/lib/minimizer/css.php b/lib/minimizer/css.php
new file mode 100644
index 00000000000..3d1196390e2
--- /dev/null
+++ b/lib/minimizer/css.php
@@ -0,0 +1,73 @@
+<?php
+
+require_once('mediawiki/CSSMin.php');
+
+class OC_Minimizer_CSS extends OC_Minimizer
+{
+	protected $contentType = 'text/css';
+
+	public function findFiles($styles) {
+		// Read the selected theme from the config file
+		$theme=OC_Config::getValue( "theme" );
+
+		// Read the detected formfactor and use the right file name.
+		$fext = OC_Template::getFormFactorExtension();
+		foreach($styles as $style){
+			// is it in 3rdparty?
+			if($this->appendIfExist(OC::$THIRDPARTYROOT, OC::$THIRDPARTYWEBROOT, $style.'.css')) {
+
+			// or in apps?
+			}elseif($this->appendIfExist(OC::$APPSROOT, OC::$APPSWEBROOT, "apps/$style$fext.css" )) {
+			}elseif($this->appendIfExist(OC::$APPSROOT, OC::$APPSWEBROOT, "apps/$style.css" )) {
+
+			// or in the owncloud root?
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "$style$fext.css" )) {
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "$style.css" )) {
+
+			// or in core ?
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "core/$style$fext.css" )) {
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "core/$style.css" )) {
+
+			}else{
+				echo('css file not found: style:'.$style.' formfactor:'.$fext.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
+				die();
+			}
+		}
+		// Add the theme css files. you can override the default values here
+		if(!empty($theme)) {
+			foreach($styles as $style){
+				     if($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/apps/$style$fext.css" )) {
+				}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/apps/$style.css" )) {
+
+				}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/$style$fext.css" )) {
+				}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/$style.css" )) {
+
+				}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/core/$style$fext.css" )) {
+				}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/core/$style.css" )) {
+				}
+			}
+		}
+		return $this->files;
+	}
+
+	public function minimizeFiles($files) {
+		$css_out = '';
+		$appswebroot = (string) OC::$APPSWEBROOT;
+		$webroot = (string) OC::$WEBROOT;
+		foreach($files as $file_info) {
+			$file = $file_info[0] . '/' . $file_info[2];
+			$css_out .= '/* ' . $file . ' */' . "\n";
+			$css = file_get_contents($file);
+			if (strpos($file, OC::$APPSROOT) == 0) {
+				$css = str_replace('%appswebroot%', $appswebroot, $css);
+				$css = str_replace('%webroot%', $webroot, $css);
+			}
+			$remote = $file_info[1];
+			$remote .= '../';
+			$remote .= dirname($file_info[2]);
+			$css_out .= CSSMin::remap($css, dirname($file), $remote, true);
+		}
+		$css_out = CSSMin::minify($css_out);
+		return $css_out;
+	}
+}
diff --git a/lib/minimizer/js.php b/lib/minimizer/js.php
new file mode 100644
index 00000000000..4ddaa79d81a
--- /dev/null
+++ b/lib/minimizer/js.php
@@ -0,0 +1,62 @@
+<?php
+
+require_once('mediawiki/JavaScriptMinifier.php');
+
+class OC_Minimizer_JS extends OC_Minimizer
+{
+	protected $contentType = 'application/javascript';
+
+	public function findFiles($scripts) {
+		// Read the selected theme from the config file
+		$theme=OC_Config::getValue( "theme" );
+
+		// Read the detected formfactor and use the right file name.
+		$fext = OC_Template::getFormFactorExtension();
+		// Add the core js files or the js files provided by the selected theme
+		foreach($scripts as $script){
+			// Is it in 3rd party?
+			if($this->appendIfExist(OC::$THIRDPARTYROOT, OC::$THIRDPARTYWEBROOT, $script.'.js')) {
+
+			// Is it in apps and overwritten by the theme?
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/apps/$script$fext.js" )) {
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/apps/$script.js" )) {
+
+			// Is it part of an app?
+			}elseif($this->appendIfExist(OC::$APPSROOT, OC::$APPSWEBROOT, "apps/$script$fext.js" )) {
+			}elseif($this->appendIfExist(OC::$APPSROOT, OC::$APPSWEBROOT, "apps/$script.js" )) {
+
+			// Is it in the owncloud root but overwritten by the theme?
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/$script$fext.js" )) {
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/$script.js" )) {
+
+			// Is it in the owncloud root ?
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "$script$fext.js" )) {
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "$script.js" )) {
+
+			// Is in core but overwritten by a theme?
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/core/$script$fext.js" )) {
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "themes/$theme/core/$script.js" )) {
+
+			// Is it in core?
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "core/$script$fext.js" )) {
+			}elseif($this->appendIfExist(OC::$SERVERROOT, OC::$WEBROOT, "core/$script.js" )) {
+
+			}else{
+				echo('js file not found: script:'.$script.' formfactor:'.$fext.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
+				die();
+			}
+		}
+		return $this->files;
+	}
+
+	public function minimizeFiles($files) {
+		$js_out = '';
+		foreach($files as $file_info) {
+			$file = $file_info[0] . '/' . $file_info[2];
+			$js_out .= '/* ' . $file . ' */' . "\n";
+			$js_out .= file_get_contents($file);
+		}
+		$js_out = JavaScriptMinifier::minify($js_out);
+		return $js_out;
+	}
+}
diff --git a/lib/template.php b/lib/template.php
index a15cfcc457b..14833a1e5b5 100644
--- a/lib/template.php
+++ b/lib/template.php
@@ -166,7 +166,7 @@ class OC_Template{
 	/**
 	 * @brief Returns the formfactor extension for current formfactor
 	 */
-	protected function getFormFactorExtension()
+	static public function getFormFactorExtension()
 	{
 		$formfactor=$_SESSION['formfactor'];
 		if($formfactor=='default') { 
@@ -196,7 +196,7 @@ class OC_Template{
 		$theme=OC_Config::getValue( "theme" );
 
 		// Read the detected formfactor and use the right file name.
-		$fext = $this->getFormFactorExtension();
+		$fext = self::getFormFactorExtension();
 
 		$app = $this->application;
 		// Check if it is a app template or not.
@@ -379,8 +379,9 @@ class OC_Template{
 			$theme=OC_Config::getValue( "theme" );
 
 			// Read the detected formfactor and use the right file name.
-			$fext = $this->getFormFactorExtension();
+			$fext = self::getFormFactorExtension();
 
+			$page->assign('jsfiles', array());
 			// Add the core js files or the js files provided by the selected theme
 			foreach(OC_Util::$scripts as $script){
 				// Is it in 3rd party?
@@ -417,6 +418,7 @@ class OC_Template{
 				}
 			}
 			// Add the css files
+			$page->assign('cssfiles', array());
 			foreach(OC_Util::$styles as $style){
 				// is it in 3rdparty?
                                 if($page->appendIfExist('cssfiles', OC::$THIRDPARTYROOT, OC::$THIRDPARTYWEBROOT, $style.'.css')) {
@@ -434,7 +436,7 @@ class OC_Template{
 				}elseif($page->appendIfExist('cssfiles', OC::$SERVERROOT, OC::$WEBROOT, "core/$style.css" )) {
 
 				}else{
-					echo('css file not found: style:'.$script.' formfactor:'.$fext.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
+					echo('css file not found: style:'.$style.' formfactor:'.$fext.' webroot:'.OC::$WEBROOT.' serverroot:'.OC::$SERVERROOT);
 					die();
 				}
 			}
diff --git a/lib/user.php b/lib/user.php
index 9bfbfd8ee70..f1903093d6d 100644
--- a/lib/user.php
+++ b/lib/user.php
@@ -168,9 +168,7 @@ class OC_User {
 		if( $run ){
 			//delete the user from all backends
 			foreach(self::$_usedBackends as $backend){
-				if($backend->implementsActions(OC_USER_BACKEND_DELETE_USER)){
-					$backend->deleteUser($uid);
-				}
+				$backend->deleteUser($uid);
 			}
 			// We have to delete the user from all groups
 			foreach( OC_Group::getUserGroups( $uid ) as $i ){
@@ -332,11 +330,9 @@ class OC_User {
 	public static function getUsers(){
 		$users=array();
 		foreach(self::$_usedBackends as $backend){
-			if($backend->implementsActions(OC_USER_BACKEND_GET_USERS)){
-				$backendUsers=$backend->getUsers();
-				if(is_array($backendUsers)){
-					$users=array_merge($users,$backendUsers);
-				}
+			$backendUsers=$backend->getUsers();
+			if(is_array($backendUsers)){
+				$users=array_merge($users,$backendUsers);
 			}
 		}
 		asort($users);
@@ -350,11 +346,9 @@ class OC_User {
 	 */
 	public static function userExists($uid){
 		foreach(self::$_usedBackends as $backend){
-			if($backend->implementsActions(OC_USER_BACKEND_USER_EXISTS)){
-				$result=$backend->userExists($uid);
-				if($result===true){
-					return true;
-				}
+			$result=$backend->userExists($uid);
+			if($result===true){
+				return true;
 			}
 		}
 		return false;
diff --git a/lib/user/backend.php b/lib/user/backend.php
index c31d4b5785b..be068a63ce0 100644
--- a/lib/user/backend.php
+++ b/lib/user/backend.php
@@ -32,11 +32,8 @@ define('OC_USER_BACKEND_NOT_IMPLEMENTED',   -501);
  * actions that user backends can define
  */
 define('OC_USER_BACKEND_CREATE_USER',       0x000001);
-define('OC_USER_BACKEND_DELETE_USER',       0x000010);
-define('OC_USER_BACKEND_SET_PASSWORD',      0x000100);
-define('OC_USER_BACKEND_CHECK_PASSWORD',    0x001000);
-define('OC_USER_BACKEND_GET_USERS',         0x010000);
-define('OC_USER_BACKEND_USER_EXISTS',       0x100000);
+define('OC_USER_BACKEND_SET_PASSWORD',      0x000010);
+define('OC_USER_BACKEND_CHECK_PASSWORD',    0x000100);
 
 
 /**
@@ -49,11 +46,8 @@ abstract class OC_User_Backend {
 
 	protected $possibleActions = array(
 		OC_USER_BACKEND_CREATE_USER => 'createUser',
-		OC_USER_BACKEND_DELETE_USER => 'deleteUser',
 		OC_USER_BACKEND_SET_PASSWORD => 'setPassword',
 		OC_USER_BACKEND_CHECK_PASSWORD => 'checkPassword',
-		OC_USER_BACKEND_GET_USERS => 'getUsers',
-		OC_USER_BACKEND_USER_EXISTS => 'userExists'
 	);
 
 	/**
@@ -85,4 +79,34 @@ abstract class OC_User_Backend {
 	public function implementsActions($actions){
 		return (bool)($this->getSupportedActions() & $actions);
 	}
+
+	/**
+	* @brief delete a user
+	* @param $uid The username of the user to delete
+	* @returns true/false
+	*
+	* Deletes a user
+	*/
+	public function deleteUser( $uid ){
+		return false;
+	}
+
+	/**
+	* @brief Get a list of all users
+	* @returns array with all uids
+	*
+	* Get a list of all users.
+	*/
+	public function getUsers(){
+		return array();
+	}
+
+	/**
+	* @brief check if a user exists
+	* @param string $uid the username
+	* @return boolean
+	*/
+	public function userExists($uid){
+		return false;
+	}
 }
diff --git a/lib/user/example.php b/lib/user/example.php
index 18bc6bce00d..7f3fd1b8578 100644
--- a/lib/user/example.php
+++ b/lib/user/example.php
@@ -40,17 +40,6 @@ abstract class OC_User_Example extends OC_User_Backend {
 	}
 
 	/**
-		* @brief delete a user
-		* @param $uid The username of the user to delete
-		* @returns true/false
-		*
-		* Deletes a user
-		*/
-	public function deleteUser( $uid ){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
-
-	/**
 		* @brief Set password
 		* @param $uid The username
 		* @param $password The new password
@@ -74,23 +63,4 @@ abstract class OC_User_Example extends OC_User_Backend {
 	public function checkPassword($uid, $password){
 		return OC_USER_BACKEND_NOT_IMPLEMENTED;
 	}
-
-	/**
-		* @brief Get a list of all users
-		* @returns array with all uids
-		*
-		* Get a list of all users.
-		*/
-	public function getUsers(){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
-
-	/**
-		* @brief check if a user exists
-		* @param string $uid the username
-		* @return boolean
-		*/
-	public function userExists($uid){
-		return OC_USER_BACKEND_NOT_IMPLEMENTED;
-	}
 }
diff --git a/lib/util.php b/lib/util.php
index fda60587b82..9a1fb7ac370 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -10,6 +10,8 @@ class OC_Util {
 	public static $headers=array();
 	private static $rootMounted=false;
 	private static $fsSetup=false;
+	public static $core_styles=array();
+	public static $core_scripts=array();
 
 	// Can be set up
 	public static function setupFS( $user = "", $root = "files" ){// configure the initial filesystem based on the configuration
@@ -39,7 +41,7 @@ class OC_Util {
 		// Create root dir.
 		if(!is_dir($CONFIG_DATADIRECTORY_ROOT)){
 			$success=@mkdir($CONFIG_DATADIRECTORY_ROOT);
-            if(!$success) {
+			if(!$success) {
 				$tmpl = new OC_Template( '', 'error', 'guest' );
 				$tmpl->assign('errors',array(1=>array('error'=>"Can't create data directory (".$CONFIG_DATADIRECTORY_ROOT.")",'hint'=>"You can usually fix this by giving the webserver write access to the ownCloud directory '".OC::$SERVERROOT."' (in a terminal, use the command 'chown -R www-data:www-data /path/to/your/owncloud/install/data' ")));
 				$tmpl->printPage();
@@ -58,7 +60,6 @@ class OC_Util {
 			self::$rootMounted=true;
 		}
 		if( $user != "" ){ //if we aren't logged in, there is no use to set up the filesystem
-
 			OC::$CONFIG_DATADIRECTORY = $CONFIG_DATADIRECTORY_ROOT."/$user/$root";
 			if( !is_dir( OC::$CONFIG_DATADIRECTORY )){
 				mkdir( OC::$CONFIG_DATADIRECTORY, 0755, true );