Merge branch 'master' of git://gitorious.org/owncloud/owncloud into oracle-support

Conflicts:
	3rdparty/Sabre/CardDAV/Plugin.php
	3rdparty/smb4php/smb.php
	apps/bookmarks/ajax/addBookmark.php
	apps/bookmarks/ajax/editBookmark.php
	apps/bookmarks/appinfo/migrate.php
	apps/calendar/ajax/calendar/edit.form.php
	apps/calendar/ajax/changeview.php
	apps/calendar/ajax/import/import.php
	apps/calendar/ajax/settings/guesstimezone.php
	apps/calendar/ajax/settings/setfirstday.php
	apps/calendar/ajax/settings/settimeformat.php
	apps/calendar/ajax/share/changepermission.php
	apps/calendar/ajax/share/share.php
	apps/calendar/ajax/share/unshare.php
	apps/calendar/appinfo/app.php
	apps/calendar/appinfo/remote.php
	apps/calendar/appinfo/update.php
	apps/calendar/appinfo/version
	apps/calendar/js/calendar.js
	apps/calendar/l10n/da.php
	apps/calendar/l10n/de.php
	apps/calendar/l10n/fi_FI.php
	apps/calendar/l10n/gl.php
	apps/calendar/l10n/he.php
	apps/calendar/l10n/hr.php
	apps/calendar/l10n/ja_JP.php
	apps/calendar/l10n/lb.php
	apps/calendar/l10n/lt_LT.php
	apps/calendar/l10n/nb_NO.php
	apps/calendar/l10n/pl.php
	apps/calendar/l10n/pt_PT.php
	apps/calendar/l10n/ro.php
	apps/calendar/l10n/ru.php
	apps/calendar/l10n/sv.php
	apps/calendar/l10n/zh_CN.php
	apps/calendar/l10n/zh_TW.php
	apps/calendar/lib/app.php
	apps/calendar/lib/calendar.php
	apps/calendar/lib/object.php
	apps/calendar/lib/share.php
	apps/calendar/templates/part.choosecalendar.rowfields.php
	apps/calendar/templates/part.import.php
	apps/calendar/templates/settings.php
	apps/contacts/ajax/activation.php
	apps/contacts/ajax/addressbook/delete.php
	apps/contacts/ajax/contact/add.php
	apps/contacts/ajax/contact/addproperty.php
	apps/contacts/ajax/contact/delete.php
	apps/contacts/ajax/contact/deleteproperty.php
	apps/contacts/ajax/contact/saveproperty.php
	apps/contacts/ajax/createaddressbook.php
	apps/contacts/ajax/cropphoto.php
	apps/contacts/ajax/currentphoto.php
	apps/contacts/ajax/importaddressbook.php
	apps/contacts/ajax/oc_photo.php
	apps/contacts/ajax/savecrop.php
	apps/contacts/ajax/selectaddressbook.php
	apps/contacts/ajax/updateaddressbook.php
	apps/contacts/ajax/uploadimport.php
	apps/contacts/ajax/uploadphoto.php
	apps/contacts/appinfo/migrate.php
	apps/contacts/appinfo/remote.php
	apps/contacts/css/contacts.css
	apps/contacts/import.php
	apps/contacts/index.php
	apps/contacts/js/contacts.js
	apps/contacts/l10n/ca.php
	apps/contacts/l10n/cs_CZ.php
	apps/contacts/l10n/da.php
	apps/contacts/l10n/de.php
	apps/contacts/l10n/el.php
	apps/contacts/l10n/eo.php
	apps/contacts/l10n/es.php
	apps/contacts/l10n/et_EE.php
	apps/contacts/l10n/eu.php
	apps/contacts/l10n/fa.php
	apps/contacts/l10n/fi_FI.php
	apps/contacts/l10n/fr.php
	apps/contacts/l10n/he.php
	apps/contacts/l10n/hr.php
	apps/contacts/l10n/hu_HU.php
	apps/contacts/l10n/ia.php
	apps/contacts/l10n/it.php
	apps/contacts/l10n/ja_JP.php
	apps/contacts/l10n/ko.php
	apps/contacts/l10n/lb.php
	apps/contacts/l10n/mk.php
	apps/contacts/l10n/nb_NO.php
	apps/contacts/l10n/nl.php
	apps/contacts/l10n/pl.php
	apps/contacts/l10n/pt_BR.php
	apps/contacts/l10n/pt_PT.php
	apps/contacts/l10n/ro.php
	apps/contacts/l10n/ru.php
	apps/contacts/l10n/sk_SK.php
	apps/contacts/l10n/sl.php
	apps/contacts/l10n/sv.php
	apps/contacts/l10n/th_TH.php
	apps/contacts/l10n/tr.php
	apps/contacts/l10n/zh_CN.php
	apps/contacts/l10n/zh_TW.php
	apps/contacts/lib/addressbook.php
	apps/contacts/lib/hooks.php
	apps/contacts/lib/vcard.php
	apps/contacts/photo.php
	apps/contacts/templates/part.contact.php
	apps/contacts/templates/part.contacts.php
	apps/contacts/templates/part.cropphoto.php
	apps/contacts/templates/part.importaddressbook.php
	apps/contacts/templates/part.selectaddressbook.php
	apps/contacts/thumbnail.php
	apps/files/ajax/download.php
	apps/files/ajax/newfile.php
	apps/files/ajax/timezone.php
	apps/files/appinfo/update.php
	apps/files/appinfo/version
	apps/files/index.php
	apps/files/js/fileactions.js
	apps/files/js/filelist.js
	apps/files/js/files.js
	apps/files/l10n/ar.php
	apps/files/l10n/bg_BG.php
	apps/files/l10n/ca.php
	apps/files/l10n/cs_CZ.php
	apps/files/l10n/da.php
	apps/files/l10n/de.php
	apps/files/l10n/el.php
	apps/files/l10n/eo.php
	apps/files/l10n/es.php
	apps/files/l10n/et_EE.php
	apps/files/l10n/eu.php
	apps/files/l10n/fa.php
	apps/files/l10n/fi_FI.php
	apps/files/l10n/fr.php
	apps/files/l10n/gl.php
	apps/files/l10n/he.php
	apps/files/l10n/hr.php
	apps/files/l10n/hu_HU.php
	apps/files/l10n/ia.php
	apps/files/l10n/id.php
	apps/files/l10n/it.php
	apps/files/l10n/ja_JP.php
	apps/files/l10n/ko.php
	apps/files/l10n/lb.php
	apps/files/l10n/lt_LT.php
	apps/files/l10n/mk.php
	apps/files/l10n/ms_MY.php
	apps/files/l10n/nb_NO.php
	apps/files/l10n/nl.php
	apps/files/l10n/nn_NO.php
	apps/files/l10n/pl.php
	apps/files/l10n/pt_BR.php
	apps/files/l10n/pt_PT.php
	apps/files/l10n/ro.php
	apps/files/l10n/ru.php
	apps/files/l10n/sk_SK.php
	apps/files/l10n/sl.php
	apps/files/l10n/sr.php
	apps/files/l10n/sr@latin.php
	apps/files/l10n/sv.php
	apps/files/l10n/th_TH.php
	apps/files/l10n/tr.php
	apps/files/l10n/uk.php
	apps/files/l10n/zh_CN.php
	apps/files/l10n/zh_TW.php
	apps/files_archive/js/archive.js
	apps/files_encryption/lib/cryptstream.php
	apps/files_encryption/lib/proxy.php
	apps/files_encryption/tests/proxy.php
	apps/files_external/appinfo/app.php
	apps/files_external/lib/smb.php
	apps/files_external/lib/streamwrapper.php
	apps/files_external/tests/config.php
	apps/files_external/tests/smb.php
	apps/files_sharing/ajax/email.php
	apps/files_sharing/ajax/getitem.php
	apps/files_sharing/ajax/setpermissions.php
	apps/files_sharing/ajax/share.php
	apps/files_sharing/ajax/toggleresharing.php
	apps/files_sharing/ajax/unshare.php
	apps/files_sharing/ajax/userautocomplete.php
	apps/files_sharing/js/settings.js
	apps/files_sharing/js/share.js
	apps/files_sharing/lib_share.php
	apps/files_sharing/settings.php
	apps/files_sharing/sharedstorage.php
	apps/files_sharing/templates/settings.php
	apps/files_versions/ajax/rollbackVersion.php
	apps/files_versions/versions.php
	apps/gallery/ajax/thumbnail.php
	apps/gallery/appinfo/app.php
	apps/gallery/appinfo/update.php
	apps/gallery/appinfo/version
	apps/gallery/css/styles.css
	apps/gallery/index.php
	apps/gallery/js/pictures.js
	apps/gallery/l10n/ca.php
	apps/gallery/l10n/cs_CZ.php
	apps/gallery/l10n/de.php
	apps/gallery/l10n/el.php
	apps/gallery/l10n/es.php
	apps/gallery/l10n/fi_FI.php
	apps/gallery/l10n/fr.php
	apps/gallery/l10n/it.php
	apps/gallery/l10n/pl.php
	apps/gallery/l10n/pt_PT.php
	apps/gallery/l10n/ru.php
	apps/gallery/l10n/sl.php
	apps/gallery/l10n/sv.php
	apps/gallery/l10n/th_TH.php
	apps/gallery/l10n/tr.php
	apps/gallery/l10n/zh_CN.php
	apps/gallery/lib/album.php
	apps/gallery/lib/hooks_handlers.php
	apps/gallery/lib/managers.php
	apps/gallery/lib/photo.php
	apps/gallery/lib/tiles.php
	apps/gallery/lib/tiles_test.php
	apps/gallery/templates/index.php
	apps/media/lib_ampache.php
	apps/media/lib_collection.php
	apps/media/lib_media.php
	apps/remoteStorage/lib_remoteStorage.php
	apps/tasks/ajax/addtaskform.php
	apps/tasks/ajax/edittask.php
	apps/user_ldap/appinfo/update.php
	apps/user_ldap/group_ldap.php
	apps/user_ldap/lib_ldap.php
	apps/user_ldap/settings.php
	apps/user_ldap/templates/settings.php
	apps/user_ldap/user_ldap.php
	apps/user_migrate/appinfo/app.php
	apps/user_migrate/templates/settings.php
	apps/user_webfinger/host-meta.php
	config/config.sample.php
	core/js/js.js
	core/l10n/da.php
	core/l10n/de.php
	core/l10n/fi_FI.php
	core/l10n/gl.php
	core/l10n/he.php
	core/l10n/hr.php
	core/l10n/id.php
	core/l10n/ja_JP.php
	core/l10n/lb.php
	core/l10n/lt_LT.php
	core/l10n/nb_NO.php
	core/l10n/pl.php
	core/l10n/pt_PT.php
	core/l10n/ro.php
	core/l10n/ru.php
	core/l10n/sv.php
	core/lostpassword/index.php
	core/templates/layout.user.php
	core/templates/login.php
	db_structure.xml
	index.php
	l10n/af/calendar.po
	l10n/af/contacts.po
	l10n/af/core.po
	l10n/af/files.po
	l10n/af/settings.po
	l10n/ar/calendar.po
	l10n/ar/contacts.po
	l10n/ar/core.po
	l10n/ar/files.po
	l10n/ar/media.po
	l10n/ar/settings.po
	l10n/bg_BG/calendar.po
	l10n/bg_BG/contacts.po
	l10n/bg_BG/core.po
	l10n/bg_BG/files.po
	l10n/bg_BG/media.po
	l10n/bg_BG/settings.po
	l10n/ca/calendar.po
	l10n/ca/contacts.po
	l10n/ca/core.po
	l10n/ca/files.po
	l10n/ca/gallery.po
	l10n/ca/settings.po
	l10n/cs_CZ/calendar.po
	l10n/cs_CZ/contacts.po
	l10n/cs_CZ/core.po
	l10n/cs_CZ/files.po
	l10n/cs_CZ/gallery.po
	l10n/cs_CZ/settings.po
	l10n/da/calendar.po
	l10n/da/contacts.po
	l10n/da/core.po
	l10n/da/files.po
	l10n/da/settings.po
	l10n/de/calendar.po
	l10n/de/contacts.po
	l10n/de/core.po
	l10n/de/files.po
	l10n/de/gallery.po
	l10n/de/settings.po
	l10n/el/calendar.po
	l10n/el/contacts.po
	l10n/el/core.po
	l10n/el/files.po
	l10n/el/gallery.po
	l10n/el/settings.po
	l10n/eo/calendar.po
	l10n/eo/contacts.po
	l10n/eo/core.po
	l10n/eo/files.po
	l10n/eo/media.po
	l10n/eo/settings.po
	l10n/es/calendar.po
	l10n/es/contacts.po
	l10n/es/core.po
	l10n/es/files.po
	l10n/es/gallery.po
	l10n/es/settings.po
	l10n/et_EE/calendar.po
	l10n/et_EE/contacts.po
	l10n/et_EE/core.po
	l10n/et_EE/files.po
	l10n/et_EE/settings.po
	l10n/eu/calendar.po
	l10n/eu/contacts.po
	l10n/eu/core.po
	l10n/eu/files.po
	l10n/eu/settings.po
	l10n/fa/calendar.po
	l10n/fa/contacts.po
	l10n/fa/core.po
	l10n/fa/files.po
	l10n/fa/settings.po
	l10n/fi_FI/calendar.po
	l10n/fi_FI/contacts.po
	l10n/fi_FI/core.po
	l10n/fi_FI/files.po
	l10n/fi_FI/gallery.po
	l10n/fi_FI/settings.po
	l10n/fr/calendar.po
	l10n/fr/contacts.po
	l10n/fr/core.po
	l10n/fr/files.po
	l10n/fr/gallery.po
	l10n/fr/media.po
	l10n/fr/settings.po
	l10n/gl/calendar.po
	l10n/gl/contacts.po
	l10n/gl/core.po
	l10n/gl/files.po
	l10n/gl/settings.po
	l10n/he/calendar.po
	l10n/he/contacts.po
	l10n/he/core.po
	l10n/he/files.po
	l10n/he/settings.po
	l10n/hr/calendar.po
	l10n/hr/contacts.po
	l10n/hr/core.po
	l10n/hr/files.po
	l10n/hr/settings.po
	l10n/hu_HU/calendar.po
	l10n/hu_HU/contacts.po
	l10n/hu_HU/core.po
	l10n/hu_HU/files.po
	l10n/hu_HU/settings.po
	l10n/hy/calendar.po
	l10n/hy/contacts.po
	l10n/hy/core.po
	l10n/hy/files.po
	l10n/hy/settings.po
	l10n/ia/calendar.po
	l10n/ia/contacts.po
	l10n/ia/core.po
	l10n/ia/files.po
	l10n/ia/settings.po
	l10n/id/calendar.po
	l10n/id/contacts.po
	l10n/id/core.po
	l10n/id/files.po
	l10n/id/settings.po
	l10n/it/calendar.po
	l10n/it/contacts.po
	l10n/it/core.po
	l10n/it/files.po
	l10n/it/gallery.po
	l10n/it/settings.po
	l10n/ja_JP/calendar.po
	l10n/ja_JP/contacts.po
	l10n/ja_JP/core.po
	l10n/ja_JP/files.po
	l10n/ja_JP/settings.po
	l10n/ko/calendar.po
	l10n/ko/contacts.po
	l10n/ko/core.po
	l10n/ko/files.po
	l10n/ko/settings.po
	l10n/lb/calendar.po
	l10n/lb/contacts.po
	l10n/lb/core.po
	l10n/lb/files.po
	l10n/lb/settings.po
	l10n/lt_LT/calendar.po
	l10n/lt_LT/contacts.po
	l10n/lt_LT/core.po
	l10n/lt_LT/files.po
	l10n/lt_LT/settings.po
	l10n/mk/calendar.po
	l10n/mk/contacts.po
	l10n/mk/core.po
	l10n/mk/files.po
	l10n/mk/settings.po
	l10n/ms_MY/calendar.po
	l10n/ms_MY/contacts.po
	l10n/ms_MY/core.po
	l10n/ms_MY/files.po
	l10n/ms_MY/settings.po
	l10n/nb_NO/calendar.po
	l10n/nb_NO/contacts.po
	l10n/nb_NO/core.po
	l10n/nb_NO/files.po
	l10n/nb_NO/settings.po
	l10n/nl/calendar.po
	l10n/nl/contacts.po
	l10n/nl/core.po
	l10n/nl/files.po
	l10n/nl/settings.po
	l10n/nn_NO/calendar.po
	l10n/nn_NO/contacts.po
	l10n/nn_NO/core.po
	l10n/nn_NO/files.po
	l10n/nn_NO/settings.po
	l10n/pl/calendar.po
	l10n/pl/contacts.po
	l10n/pl/core.po
	l10n/pl/files.po
	l10n/pl/gallery.po
	l10n/pl/settings.po
	l10n/pt_BR/calendar.po
	l10n/pt_BR/contacts.po
	l10n/pt_BR/core.po
	l10n/pt_BR/files.po
	l10n/pt_BR/settings.po
	l10n/pt_PT/calendar.po
	l10n/pt_PT/contacts.po
	l10n/pt_PT/core.po
	l10n/pt_PT/files.po
	l10n/pt_PT/gallery.po
	l10n/pt_PT/settings.po
	l10n/ro/calendar.po
	l10n/ro/contacts.po
	l10n/ro/core.po
	l10n/ro/files.po
	l10n/ro/settings.po
	l10n/ru/calendar.po
	l10n/ru/contacts.po
	l10n/ru/core.po
	l10n/ru/files.po
	l10n/ru/gallery.po
	l10n/ru/settings.po
	l10n/sk_SK/calendar.po
	l10n/sk_SK/contacts.po
	l10n/sk_SK/core.po
	l10n/sk_SK/files.po
	l10n/sk_SK/settings.po
	l10n/sl/calendar.po
	l10n/sl/contacts.po
	l10n/sl/core.po
	l10n/sl/files.po
	l10n/sl/gallery.po
	l10n/sl/settings.po
	l10n/sr/calendar.po
	l10n/sr/contacts.po
	l10n/sr/core.po
	l10n/sr/files.po
	l10n/sr/settings.po
	l10n/sr@latin/calendar.po
	l10n/sr@latin/contacts.po
	l10n/sr@latin/core.po
	l10n/sr@latin/files.po
	l10n/sr@latin/settings.po
	l10n/sv/calendar.po
	l10n/sv/contacts.po
	l10n/sv/core.po
	l10n/sv/files.po
	l10n/sv/gallery.po
	l10n/sv/media.po
	l10n/sv/settings.po
	l10n/templates/bookmarks.pot
	l10n/templates/calendar.pot
	l10n/templates/contacts.pot
	l10n/templates/core.pot
	l10n/templates/files.pot
	l10n/templates/gallery.pot
	l10n/templates/media.pot
	l10n/templates/settings.pot
	l10n/th_TH/calendar.po
	l10n/th_TH/contacts.po
	l10n/th_TH/core.po
	l10n/th_TH/files.po
	l10n/th_TH/gallery.po
	l10n/th_TH/settings.po
	l10n/tr/calendar.po
	l10n/tr/contacts.po
	l10n/tr/core.po
	l10n/tr/files.po
	l10n/tr/gallery.po
	l10n/tr/settings.po
	l10n/uk/calendar.po
	l10n/uk/contacts.po
	l10n/uk/core.po
	l10n/uk/files.po
	l10n/uk/media.po
	l10n/uk/settings.po
	l10n/zh_CN/calendar.po
	l10n/zh_CN/contacts.po
	l10n/zh_CN/core.po
	l10n/zh_CN/files.po
	l10n/zh_CN/gallery.po
	l10n/zh_CN/settings.po
	l10n/zh_TW/calendar.po
	l10n/zh_TW/contacts.po
	l10n/zh_TW/core.po
	l10n/zh_TW/files.po
	l10n/zh_TW/settings.po
	lib/app.php
	lib/base.php
	lib/connector/sabre/file.php
	lib/connector/sabre/locks.php
	lib/connector/sabre/node.php
	lib/db.php
	lib/filecache.php
	lib/fileproxy/quota.php
	lib/files.php
	lib/filestorage/local.php
	lib/filesystemview.php
	lib/group/database.php
	lib/helper.php
	lib/installer.php
	lib/json.php
	lib/l10n.php
	lib/migrate.php
	lib/mimetypes.fixlist.php
	lib/ocs.php
	lib/preferences.php
	lib/public/json.php
	lib/public/util.php
	lib/template.php
	lib/user.php
	lib/user/database.php
	lib/util.php
	lib/vcategories.php
	ocs/providers.php
	settings/admin.php
	settings/ajax/lostpassword.php
	settings/ajax/removeuser.php
	settings/ajax/setbackgroundjobsmode.php
	settings/ajax/setlanguage.php
	settings/ajax/setquota.php
	settings/ajax/togglegroups.php
	settings/apps.php
	settings/css/settings.css
	settings/js/apps.js
	settings/js/users.js
	settings/l10n/bg_BG.php
	settings/l10n/ca.php
	settings/l10n/cs_CZ.php
	settings/l10n/da.php
	settings/l10n/de.php
	settings/l10n/el.php
	settings/l10n/eo.php
	settings/l10n/es.php
	settings/l10n/et_EE.php
	settings/l10n/eu.php
	settings/l10n/fa.php
	settings/l10n/fi_FI.php
	settings/l10n/fr.php
	settings/l10n/gl.php
	settings/l10n/he.php
	settings/l10n/hr.php
	settings/l10n/hu_HU.php
	settings/l10n/it.php
	settings/l10n/ja_JP.php
	settings/l10n/ko.php
	settings/l10n/lt_LT.php
	settings/l10n/mk.php
	settings/l10n/ms_MY.php
	settings/l10n/nb_NO.php
	settings/l10n/nl.php
	settings/l10n/nn_NO.php
	settings/l10n/pl.php
	settings/l10n/pt_BR.php
	settings/l10n/pt_PT.php
	settings/l10n/ru.php
	settings/l10n/sk_SK.php
	settings/l10n/sl.php
	settings/l10n/sv.php
	settings/l10n/th_TH.php
	settings/l10n/tr.php
	settings/l10n/zh_CN.php
	settings/personal.php
	settings/templates/admin.php
	settings/templates/users.php

5 files changed, 198 insertions, 70 deletions

diff --git a/lib/group/backend.php b/lib/group/backend.php
index af6c53c8035..5969986c652 100644
--- a/lib/group/backend.php
+++ b/lib/group/backend.php
@@ -4,7 +4,7 @@
 * ownCloud
 *
 * @author Frank Karlitschek
-* @copyright 2010 Frank Karlitschek karlitschek@kde.org
+* @copyright 2012 Frank Karlitschek frank@owncloud.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
@@ -31,28 +31,20 @@ 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
  */
-abstract class OC_Group_Backend {
+abstract class OC_Group_Backend implements OC_Group_Interface {
 	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'
 	);
-	
+
 	/**
 	* @brief Get all supported actions
 	* @returns bitwise-or'ed actions
@@ -70,7 +62,7 @@ abstract class OC_Group_Backend {
 
 		return $actions;
 	}
-	
+
 	/**
 	* @brief Check if backend implements actions
 	* @param $actions bitwise-or'ed actions
@@ -84,14 +76,55 @@ abstract class OC_Group_Backend {
 	}
 
 	/**
+	 * @brief is user in group?
+	 * @param $uid uid of the user
+	 * @param $gid gid of the group
+	 * @returns true/false
+	 *
+	 * Checks whether the user is member of a group or not.
+	 */
+	public function inGroup($uid, $gid){
+		return in_array($gid, $this->getUserGroups($uid));
+	}
+
+	/**
+	 * @brief Get all groups a user belongs to
+	 * @param $uid Name of the user
+	 * @returns array with group names
+	 *
+	 * This function fetches all groups a user belongs to. It does not check
+	 * if the user exists at all.
+	 */
+	public function getUserGroups($uid){
+		return array();
+	}
+
+	/**
+	 * @brief get a list of all groups
+	 * @returns array with group names
+	 *
+	 * Returns a list with all groups
+	 */
+
+	public function getGroups($search = '', $limit = -1, $offset = 0) {
+		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, $this->getGroups());
+		return in_array($gid, $this->getGroups($gid, 1));
 	}
+
+	/**
+	 * @brief get a list of all users in a group
+	 * @returns array with user ids
+	 */
+	public function usersInGroup($gid, $search = '', $limit = -1, $offset = 0) {
+		return array();
+	}
+
 }
diff --git a/lib/group/database.php b/lib/group/database.php
index 5e52432c492..52608b2db73 100644
--- a/lib/group/database.php
+++ b/lib/group/database.php
@@ -4,7 +4,7 @@
  * ownCloud
  *
  * @author Frank Karlitschek
- * @copyright 2010 Frank Karlitschek karlitschek@kde.org
+ * @copyright 2012 Frank Karlitschek frank@owncloud.org
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
@@ -41,7 +41,6 @@
  * Class for group management in a SQL Database (e.g. MySQL, SQLite)
  */
 class OC_Group_Database extends OC_Group_Backend {
-	static private $userGroupCache=array();
 
 	/**
 	 * @brief Try to create a new group
@@ -51,10 +50,10 @@ class OC_Group_Database extends OC_Group_Backend {
 	 * Trys to create a new group. If the group name already exists, false will
 	 * be returned.
 	 */
-	public static function createGroup( $gid ){
+	public function createGroup( $gid ){
 		// Check for existence
-		$query = OC_DB::prepare( 'SELECT `gid` FROM `*PREFIX*groups` WHERE `gid` = ?' );
-		$result = $query->execute( array( $gid ));
+		$stmt = OC_DB::prepare( "SELECT `gid` FROM `*PREFIX*groups` WHERE `gid` = ?" );
+		$result = $stmt->execute( array( $gid ));
 
 		if( $result->fetchRow() ){
 			// Can not add an existing group
@@ -62,8 +61,8 @@ class OC_Group_Database extends OC_Group_Backend {
 		}
 		else{
 			// Add group and exit
-			$query = OC_DB::prepare( 'INSERT INTO `*PREFIX*groups` ( `gid` ) VALUES( ? )' );
-			$result = $query->execute( array( $gid ));
+			$stmt = OC_DB::prepare( "INSERT INTO `*PREFIX*groups` ( `gid` ) VALUES( ? )" );
+			$result = $stmt->execute( array( $gid ));
 
 			return $result ? true : false;
 		}
@@ -76,14 +75,14 @@ class OC_Group_Database extends OC_Group_Backend {
 	 *
 	 * Deletes a group and removes it from the group_user-table
 	 */
-	public static function deleteGroup( $gid ){
+	public function deleteGroup( $gid ){
 		// Delete the group
-		$query = OC_DB::prepare( 'DELETE FROM `*PREFIX*groups` WHERE `gid` = ?' );
-		$result = $query->execute( array( $gid ));
+		$stmt = OC_DB::prepare( "DELETE FROM `*PREFIX*groups` WHERE `gid` = ?" );
+		$result = $stmt->execute( array( $gid ));
 
 		// Delete the group-user relation
-		$query = OC_DB::prepare( 'DELETE FROM `*PREFIX*group_user` WHERE `gid` = ?' );
-		$result = $query->execute( array( $gid ));
+		$stmt = OC_DB::prepare( "DELETE FROM `*PREFIX*group_user` WHERE `gid` = ?" );
+		$result = $stmt->execute( array( $gid ));
 
 		return true;
 	}
@@ -96,10 +95,10 @@ class OC_Group_Database extends OC_Group_Backend {
 	 *
 	 * Checks whether the user is member of a group or not.
 	 */
-	public static function inGroup( $uid, $gid ){
+	public function inGroup( $uid, $gid ){
 		// check
-		$query = OC_DB::prepare( 'SELECT `uid` FROM `*PREFIX*group_user` WHERE `gid` = ? AND `uid` = ?' );
-		$result = $query->execute( array( $gid, $uid ));
+		$stmt = OC_DB::prepare( "SELECT `uid` FROM `*PREFIX*group_user` WHERE `gid` = ? AND `uid` = ?" );
+		$result = $stmt->execute( array( $gid, $uid ));
 
 		return $result->fetchRow() ? true : false;
 	}
@@ -112,11 +111,11 @@ class OC_Group_Database extends OC_Group_Backend {
 	 *
 	 * Adds a user to a group.
 	 */
-	public static function addToGroup( $uid, $gid ){
+	public function addToGroup( $uid, $gid ){
 		// No duplicate entries!
-		if( !self::inGroup( $uid, $gid )){
-			$query = OC_DB::prepare( 'INSERT INTO `*PREFIX*group_user` ( `uid`, `gid` ) VALUES( ?, ? )' );
-			$result = $query->execute( array( $uid, $gid ));
+		if( !$this->inGroup( $uid, $gid )){
+			$stmt = OC_DB::prepare( "INSERT INTO `*PREFIX*group_user` ( `uid`, `gid` ) VALUES( ?, ? )" );
+			$stmt->execute( array( $uid, $gid ));
 			return true;
 		}else{
 			return false;
@@ -131,9 +130,9 @@ class OC_Group_Database extends OC_Group_Backend {
 	 *
 	 * removes the user from a group.
 	 */
-	public static function removeFromGroup( $uid, $gid ){
-		$query = OC_DB::prepare( 'DELETE FROM `*PREFIX*group_user` WHERE `uid` = ? AND `gid` = ?' );
-		$result = $query->execute( array( $uid, $gid ));
+	public function removeFromGroup( $uid, $gid ){
+		$stmt = OC_DB::prepare( "DELETE FROM `*PREFIX*group_user` WHERE `uid` = ? AND `gid` = ?" );
+		$stmt->execute( array( $uid, $gid ));
 
 		return true;
 	}
@@ -146,10 +145,10 @@ class OC_Group_Database extends OC_Group_Backend {
 	 * This function fetches all groups a user belongs to. It does not check
 	 * if the user exists at all.
 	 */
-	public static function getUserGroups( $uid ){
+	public function getUserGroups( $uid ){
 		// No magic!
-		$query = OC_DB::prepare( 'SELECT `gid` FROM `*PREFIX*group_user` WHERE `uid` = ?' );
-		$result = $query->execute( array( $uid ));
+		$stmt = OC_DB::prepare( "SELECT `gid` FROM `*PREFIX*group_user` WHERE `uid` = ?" );
+		$result = $stmt->execute( array( $uid ));
 
 		$groups = array();
 		while( $row = $result->fetchRow()){
@@ -165,28 +164,40 @@ class OC_Group_Database extends OC_Group_Backend {
 	 *
 	 * Returns a list with all groups
 	 */
-	public static function getGroups(){
-		$query = OC_DB::prepare( 'SELECT `gid` FROM `*PREFIX*groups`' );
-		$result = $query->execute();
-
+	public function getGroups($search = '', $limit = null, $offset = null) {
+		$stmt = OC_DB::prepare('SELECT `gid` FROM `*PREFIX*groups` WHERE `gid` LIKE ?', $limit, $offset);
+		$result = $stmt->execute(array($search.'%'));
 		$groups = array();
-		while( $row = $result->fetchRow()){
-			$groups[] = $row["gid"];
+		while ($row = $result->fetchRow()) {
+			$groups[] = $row['gid'];
 		}
-
 		return $groups;
 	}
-	
+
+	/**
+	 * check if a group exists
+	 * @param string $gid
+	 * @return bool
+	 */
+	public function groupExists($gid) {
+		$query = OC_DB::prepare('SELECT `gid` FROM `*PREFIX*groups` WHERE `gid` = ?');
+		$result = $query->execute(array($gid))->fetchOne();
+		if ($result) {
+			return true;
+		}
+		return false;
+	}
+
 	/**
 	 * @brief get a list of all users in a group
 	 * @returns array with user ids
 	 */
-	public static function usersInGroup($gid){
-		$query=OC_DB::prepare('SELECT `uid` FROM `*PREFIX*group_user` WHERE `gid`=?');
-		$users=array();
-		$result=$query->execute(array($gid));
-		while($row=$result->fetchRow()){
-			$users[]=$row['uid'];
+	public function usersInGroup($gid, $search = '', $limit = null, $offset = null) {
+		$stmt = OC_DB::prepare('SELECT `uid` FROM `*PREFIX*group_user` WHERE `gid` = ? AND `uid` LIKE ?', $limit, $offset);
+		$result = $stmt->execute(array($gid, $search.'%'));
+		$users = array();
+		while ($row = $result->fetchRow()) {
+			$users[] = $row['uid'];
 		}
 		return $users;
 	}
diff --git a/lib/group/dummy.php b/lib/group/dummy.php
index 5220237ecbf..51eca28f3f4 100644
--- a/lib/group/dummy.php
+++ b/lib/group/dummy.php
@@ -4,7 +4,7 @@
 * ownCloud
 *
 * @author Frank Karlitschek
-* @copyright 2010 Frank Karlitschek karlitschek@kde.org
+* @copyright 2012 Frank Karlitschek frank@owncloud.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
@@ -126,7 +126,8 @@ class OC_Group_Dummy extends OC_Group_Backend {
 	 */
 	public function getUserGroups($uid){
 		$groups=array();
-		foreach($this->groups as $group=>$user){
+		$allGroups=array_keys($this->groups);
+		foreach($allGroups as $group){
 			if($this->inGroup($uid,$group)){
 				$groups[]=$group;
 			}
@@ -140,7 +141,7 @@ class OC_Group_Dummy extends OC_Group_Backend {
 	 *
 	 * Returns a list with all groups
 	 */
-	public function getGroups(){
+	public function getGroups($search = '', $limit = -1, $offset = 0) {
 		return array_keys($this->groups);
 	}
 
@@ -148,7 +149,7 @@ class OC_Group_Dummy extends OC_Group_Backend {
 	 * @brief get a list of all users in a group
 	 * @returns array with user ids
 	 */
-	public function usersInGroup($gid){
+	public function usersInGroup($gid, $search = '', $limit = -1, $offset = 0) {
 		if(isset($this->groups[$gid])){
 			return $this->groups[$gid];
 		}else{
diff --git a/lib/group/example.php b/lib/group/example.php
index a88159f91be..76d12629763 100644
--- a/lib/group/example.php
+++ b/lib/group/example.php
@@ -4,7 +4,7 @@
 * ownCloud
 *
 * @author Frank Karlitschek
-* @copyright 2010 Frank Karlitschek karlitschek@kde.org
+* @copyright 2012 Frank Karlitschek frank@owncloud.org
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
@@ -34,7 +34,7 @@ abstract class OC_Group_Example {
 	 * Trys to create a new group. If the group name already exists, false will
 	 * be returned.
 	 */
-	public static function createGroup($gid){}
+	abstract public static function createGroup($gid);
 
 	/**
 	 * @brief delete a group
@@ -43,7 +43,7 @@ abstract class OC_Group_Example {
 	 *
 	 * Deletes a group and removes it from the group_user-table
 	 */
-	public static function deleteGroup($gid){}
+	abstract public static function deleteGroup($gid);
 
 	/**
 	 * @brief is user in group?
@@ -53,7 +53,7 @@ abstract class OC_Group_Example {
 	 *
 	 * Checks whether the user is member of a group or not.
 	 */
-	public static function inGroup($uid, $gid){}
+	abstract public static function inGroup($uid, $gid);
 
 	/**
 	 * @brief Add a user to a group
@@ -63,7 +63,7 @@ abstract class OC_Group_Example {
 	 *
 	 * Adds a user to a group.
 	 */
-	public static function addToGroup($uid, $gid){}
+	abstract public static function addToGroup($uid, $gid);
 
 	/**
 	 * @brief Removes a user from a group
@@ -73,7 +73,7 @@ abstract class OC_Group_Example {
 	 *
 	 * removes the user from a group.
 	 */
-	public static function removeFromGroup($uid,$gid){}
+	abstract public static function removeFromGroup($uid,$gid);
 
 	/**
 	 * @brief Get all groups a user belongs to
@@ -83,7 +83,7 @@ abstract class OC_Group_Example {
 	 * This function fetches all groups a user belongs to. It does not check
 	 * if the user exists at all.
 	 */
-	public static function getUserGroups($uid){}
+	abstract public static function getUserGroups($uid);
 
 	/**
 	 * @brief get a list of all groups
@@ -91,12 +91,19 @@ abstract class OC_Group_Example {
 	 *
 	 * Returns a list with all groups
 	 */
-	public static function getGroups(){}
+	abstract public static function getGroups($search = '', $limit = -1, $offset = 0);
+
+	/**
+	 * check if a group exists
+	 * @param string $gid
+	 * @return bool
+	 */
+	abstract public function groupExists($gid);
 
 	/**
 	 * @brief get a list of all users in a group
 	 * @returns array with user ids
 	 */
-	public static function usersInGroup($gid){}
+	abstract public static function usersInGroup($gid, $search = '', $limit = -1, $offset = 0);
 
 }
diff --git a/lib/group/interface.php b/lib/group/interface.php
new file mode 100644
index 00000000000..12cc07a5374
--- /dev/null
+++ b/lib/group/interface.php
@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * ownCloud - group interface
+ *
+ * @author Arthur Schiwon
+ * @copyright 2012 Arthur Schiwon blizzz@owncloud.org
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU AFFERO GENERAL PUBLIC LICENSE for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public
+ * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+interface OC_Group_Interface {
+	/**
+	* @brief Check if backend implements actions
+	* @param $actions bitwise-or'ed actions
+	* @returns boolean
+	*
+	* Returns the supported actions as int to be
+	* compared with OC_GROUP_BACKEND_CREATE_GROUP etc.
+	*/
+	public function implementsActions($actions);
+
+	/**
+	 * @brief is user in group?
+	 * @param $uid uid of the user
+	 * @param $gid gid of the group
+	 * @returns true/false
+	 *
+	 * Checks whether the user is member of a group or not.
+	 */
+	public function inGroup($uid, $gid);
+
+	/**
+	 * @brief Get all groups a user belongs to
+	 * @param $uid Name of the user
+	 * @returns array with group names
+	 *
+	 * This function fetches all groups a user belongs to. It does not check
+	 * if the user exists at all.
+	 */
+	public function getUserGroups($uid);
+
+	/**
+	 * @brief get a list of all groups
+	 * @returns array with group names
+	 *
+	 * Returns a list with all groups
+	 */
+	public function getGroups($search = '', $limit = -1, $offset = 0);
+
+	/**
+	 * 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
+	 */
+	public function usersInGroup($gid, $search = '', $limit = -1, $offset = 0);
+
+}
\ No newline at end of file