nextcloud/lib/group.php

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<?php
/**
* ownCloud
*
* @author Frank Karlitschek
2012-05-26 21:14:24 +04:00
* @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
* 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/>.
*
*/
/**
* This class provides all methods needed for managing groups.
*
* Hooks provided:
* pre_createGroup(&run, gid)
* post_createGroup(gid)
* pre_deleteGroup(&run, gid)
* post_deleteGroup(gid)
* pre_addToGroup(&run, uid, gid)
* post_addToGroup(uid, gid)
* pre_removeFromGroup(&run, uid, gid)
* post_removeFromGroup(uid, gid)
*/
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class OC_Group {
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// The backend used for group management
private static $_usedBackends = array();
/**
* @brief set the group backend
* @param string $backend The backend to use for user managment
* @returns true/false
*/
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public static function useBackend( $backend ){
if($backend instanceof OC_Group_Backend){
self::$_usedBackends[]=$backend;
}
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}
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/**
* remove all used backends
*/
public static function clearBackends(){
self::$_usedBackends=array();
}
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/**
* @brief Try to create a new group
* @param $gid The name of the group to create
* @returns true/false
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*
* Trys to create a new group. If the group name already exists, false will
* be returned. Basic checking of Group name
*
* Allowed characters in the username are: "a-z", "A-Z", "0-9" and "_.@-"
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*/
public static function createGroup( $gid ){
// Check the name for bad characters
// Allowed are: "a-z", "A-Z", "0-9" and "_.@-"
if( preg_match( '/[^a-zA-Z0-9 _\.@\-]/', $gid )){
return false;
}
// No empty group names!
if( !$gid ){
return false;
}
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// No duplicate group names
if( in_array( $gid, self::getGroups())){
return false;
}
$run = true;
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OC_Hook::emit( "OC_Group", "pre_createGroup", array( "run" => &$run, "gid" => $gid ));
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if($run){
//create the user in the first backend that supports creating users
foreach(self::$_usedBackends as $backend){
if(!$backend->implementsActions(OC_GROUP_BACKEND_CREATE_GROUP))
continue;
$backend->createGroup($gid);
OC_Hook::emit( "OC_User", "post_createGroup", array( "gid" => $gid ));
return true;
}
}else{
return false;
}
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}
/**
* @brief delete a group
* @param $gid gid of the group to delete
* @returns true/false
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*
* Deletes a group and removes it from the group_user-table
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*/
public static function deleteGroup( $gid ){
// Prevent users from deleting group admin
if( $gid == "admin" ){
return false;
}
$run = true;
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OC_Hook::emit( "OC_Group", "pre_deleteGroup", array( "run" => &$run, "gid" => $gid ));
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if($run){
//delete the group from all backends
foreach(self::$_usedBackends as $backend){
if(!$backend->implementsActions(OC_GROUP_BACKEND_DELETE_GROUP))
continue;
$backend->deleteGroup($gid);
OC_Hook::emit( "OC_User", "post_deleteGroup", array( "gid" => $gid ));
return true;
}
}else{
return false;
}
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}
/**
* @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, $gid ){
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foreach(self::$_usedBackends as $backend){
if(!$backend->implementsActions(OC_GROUP_BACKEND_IN_GROUP))
continue;
if($backend->inGroup($uid,$gid)){
return true;
}
}
return false;
}
/**
* @brief Add a user to a group
* @param $uid Name of the user to add to group
* @param $gid Name of the group in which add the user
* @returns true/false
*
* Adds a user to a group.
*/
public static function addToGroup( $uid, $gid ){
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// Does the group exist?
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if( !OC_Group::groupExists($gid)){
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return false;
}
// Go go go
$run = true;
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OC_Hook::emit( "OC_Group", "pre_addToGroup", array( "run" => &$run, "uid" => $uid, "gid" => $gid ));
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if($run){
$succes=false;
//add the user to the all backends that have the group
foreach(self::$_usedBackends as $backend){
if(!$backend->implementsActions(OC_GROUP_BACKEND_ADD_TO_GROUP))
continue;
if($backend->groupExists($gid)){
$succes|=$backend->addToGroup($uid, $gid);
}
}
if($succes){
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OC_Hook::emit( "OC_User", "post_addToGroup", array( "uid" => $uid, "gid" => $gid ));
}
return $succes;
}else{
return false;
}
}
/**
* @brief Removes a user from a group
* @param $uid Name of the user to remove from group
* @param $gid Name of the group from which remove the user
* @returns true/false
*
* removes the user from a group.
*/
public static function removeFromGroup( $uid, $gid ){
$run = true;
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OC_Hook::emit( "OC_Group", "pre_removeFromGroup", array( "run" => &$run, "uid" => $uid, "gid" => $gid ));
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if($run){
//remove the user from the all backends that have the group
foreach(self::$_usedBackends as $backend){
if(!$backend->implementsActions(OC_GROUP_BACKEND_REMOVE_FROM_GOUP))
continue;
$backend->removeFromGroup($uid, $gid);
OC_Hook::emit( "OC_User", "post_removeFromGroup", array( "uid" => $uid, "gid" => $gid ));
}
return true;
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}else{
return false;
}
}
/**
* @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( $uid ){
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$groups=array();
foreach(self::$_usedBackends as $backend){
if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_USER_GROUPS))
continue;
$groups=array_merge($backend->getUserGroups($uid),$groups);
}
return $groups;
}
/**
* @brief get a list of all groups
* @returns array with group names
*
* Returns a list with all groups
*/
public static function getGroups(){
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$groups=array();
foreach(self::$_usedBackends as $backend){
if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_GROUPS))
continue;
$groups=array_merge($backend->getGroups(),$groups);
}
return $groups;
}
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/**
* check if a group exists
* @param string $gid
* @return bool
*/
public static function groupExists($gid){
foreach(self::$_usedBackends as $backend){
if ($backend->groupExists($gid)){
return true;
}
}
return false;
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}
/**
* @brief get a list of all users in a group
* @returns array with user ids
*/
public static function usersInGroup($gid){
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$users=array();
foreach(self::$_usedBackends as $backend){
if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_USERS))
continue;
$users=array_merge($backend->usersInGroup($gid),$users);
}
return $users;
}
}