280 lines
7 KiB
PHP
280 lines
7 KiB
PHP
<?php
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/**
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* ownCloud
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*
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* @author Frank Karlitschek
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* @copyright 2010 Frank Karlitschek karlitschek@kde.org
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* This class provides all methods needed for managing groups.
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*
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* Hooks provided:
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* pre_createGroup(&run, gid)
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* post_createGroup(gid)
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* pre_deleteGroup(&run, gid)
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* post_deleteGroup(gid)
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* pre_addToGroup(&run, uid, gid)
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* post_addToGroup(uid, gid)
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* pre_removeFromGroup(&run, uid, gid)
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* post_removeFromGroup(uid, gid)
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*/
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class OC_Group {
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// The backend used for group management
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private static $_usedBackends = array();
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/**
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* @brief set the group backend
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* @param string $backend The backend to use for user managment
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* @returns true/false
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*/
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public static function useBackend( $backend ){
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if($backend instanceof OC_Group_Backend){
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self::$_usedBackends[]=$backend;
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}
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}
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/**
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* remove all used backends
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*/
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public static function clearBackends(){
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self::$_usedBackends=array();
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}
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/**
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* @brief Try to create a new group
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* @param $gid The name of the group to create
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* @returns true/false
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*
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* Trys to create a new group. If the group name already exists, false will
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* be returned. Basic checking of Group name
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*
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* Allowed characters in the username are: "a-z", "A-Z", "0-9" and "_.@-"
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*/
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public static function createGroup( $gid ){
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// Check the name for bad characters
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// Allowed are: "a-z", "A-Z", "0-9" and "_.@-"
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if( preg_match( '/[^a-zA-Z0-9 _\.@\-]/', $gid )){
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return false;
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}
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// No empty group names!
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if( !$gid ){
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return false;
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}
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// No duplicate group names
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if( in_array( $gid, self::getGroups())){
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return false;
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}
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$run = true;
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OC_Hook::emit( "OC_Group", "pre_createGroup", array( "run" => &$run, "gid" => $gid ));
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if($run){
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//create the user in the first backend that supports creating users
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foreach(self::$_usedBackends as $backend){
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if(!$backend->implementsActions(OC_GROUP_BACKEND_CREATE_GROUP))
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continue;
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$backend->createGroup($gid);
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OC_Hook::emit( "OC_User", "post_createGroup", array( "gid" => $gid ));
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return true;
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}
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}else{
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return false;
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}
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}
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/**
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* @brief delete a group
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* @param $gid gid of the group to delete
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* @returns true/false
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*
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* Deletes a group and removes it from the group_user-table
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*/
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public static function deleteGroup( $gid ){
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// Prevent users from deleting group admin
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if( $gid == "admin" ){
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return false;
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}
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$run = true;
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OC_Hook::emit( "OC_Group", "pre_deleteGroup", array( "run" => &$run, "gid" => $gid ));
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if($run){
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//delete the group from all backends
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foreach(self::$_usedBackends as $backend){
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if(!$backend->implementsActions(OC_GROUP_BACKEND_DELETE_GROUP))
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continue;
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$backend->deleteGroup($gid);
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OC_Hook::emit( "OC_User", "post_deleteGroup", array( "gid" => $gid ));
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return true;
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}
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}else{
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return false;
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}
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}
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/**
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* @brief is user in group?
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* @param $uid uid of the user
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* @param $gid gid of the group
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* @returns true/false
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*
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* Checks whether the user is member of a group or not.
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*/
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public static function inGroup( $uid, $gid ){
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foreach(self::$_usedBackends as $backend){
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if(!$backend->implementsActions(OC_GROUP_BACKEND_IN_GROUP))
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continue;
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if($backend->inGroup($uid,$gid)){
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return true;
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}
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}
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return false;
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}
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/**
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* @brief Add a user to a group
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* @param $uid Name of the user to add to group
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* @param $gid Name of the group in which add the user
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* @returns true/false
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*
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* Adds a user to a group.
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*/
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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;
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}
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// Go go go
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$run = true;
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OC_Hook::emit( "OC_Group", "pre_addToGroup", array( "run" => &$run, "uid" => $uid, "gid" => $gid ));
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if($run){
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$succes=false;
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//add the user to the all backends that have the group
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foreach(self::$_usedBackends as $backend){
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if(!$backend->implementsActions(OC_GROUP_BACKEND_ADD_TO_GROUP))
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continue;
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$succes|=$backend->addToGroup($uid, $gid);
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OC_Hook::emit( "OC_User", "post_addToGroup", array( "uid" => $uid, "gid" => $gid ));
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}
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return $succes;
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}else{
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return false;
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}
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}
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/**
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* @brief Removes a user from a group
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* @param $uid Name of the user to remove from group
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* @param $gid Name of the group from which remove the user
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* @returns true/false
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*
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* removes the user from a group.
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*/
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public static function removeFromGroup( $uid, $gid ){
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$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){
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//remove the user from the all backends that have the group
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foreach(self::$_usedBackends as $backend){
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if(!$backend->implementsActions(OC_GROUP_BACKEND_REMOVE_FROM_GOUP))
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continue;
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$backend->removeFromGroup($uid, $gid);
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OC_Hook::emit( "OC_User", "post_removeFromGroup", array( "uid" => $uid, "gid" => $gid ));
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}
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return true;
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}else{
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return false;
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}
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}
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/**
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* @brief Get all groups a user belongs to
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* @param $uid Name of the user
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* @returns array with group names
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*
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* This function fetches all groups a user belongs to. It does not check
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* if the user exists at all.
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*/
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public static function getUserGroups( $uid ){
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$groups=array();
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foreach(self::$_usedBackends as $backend){
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if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_USER_GROUPS))
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continue;
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$groups=array_merge($backend->getUserGroups($uid),$groups);
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}
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return $groups;
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}
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/**
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* @brief get a list of all groups
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* @returns array with group names
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*
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* Returns a list with all groups
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*/
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public static function getGroups(){
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$groups=array();
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foreach(self::$_usedBackends as $backend){
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if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_GROUPS))
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continue;
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$groups=array_merge($backend->getGroups(),$groups);
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}
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return $groups;
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}
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/**
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* check if a group exists
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* @param string $gid
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* @return bool
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*/
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public static function groupExists($gid){
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foreach(self::$_usedBackends as $backend){
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if ($backend->groupExists($gid)){
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return true;
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}
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}
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return false;
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}
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/**
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* @brief get a list of all users in a group
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* @returns array with user ids
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*/
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public static function usersInGroup($gid){
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$users=array();
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foreach(self::$_usedBackends as $backend){
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if(!$backend->implementsActions(OC_GROUP_BACKEND_GET_USERS))
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continue;
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$users=array_merge($backend->usersInGroup($gid),$users);
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}
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return $users;
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}
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}
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