add functions to get a list of all users or groups

inc/User/backend.php

@@ -138,4 +138,16 @@ abstract class OC_USER_BACKEND {
 	 */
 	abstract public static function checkPassword($username, $password);
 
+
+	/**
+	 * get a list of all users
+	 *
+	 */
+	abstract public static function getUsers();
+	
+	/**
+	 * get a list of all groups
+	 *
+	 */
+	abstract public static function getGroups();
 }

inc/lib_user.php

@@ -213,4 +213,19 @@ class OC_USER {
 		return self::$_backend->checkPassword($username, $password);
 	}
 
+	/**
+	 * get a list of all users
+	 *
+	 */
+	public static function getUsers() {
+		return self::$_backend->getUsers();
+	}
+	
+	/**
+	 * get a list of all groups
+	 *
+	 */
+	public static function getGroups() {
+		return self::$_backend->getGroups();
+	}
 }

plugins/ldap/lib_ldap.php

@@ -199,4 +199,21 @@ class OC_USER_LDAP extends OC_USER_BACKEND {
 		return false;
 	}
 
+	/**
+	 * get a list of all users
+	 *
+	 */
+	public static function getUsers(){
+		// does not work with MOD_AUTH (only or some modules)
+		return false;
+	}
+	
+	/**
+	 * get a list of all groups
+	 *
+	 */
+	public static function getGroups(){
+		// does not work with MOD_AUTH (only or some modules)
+		return false;
+	}
 }