365 lines
9.1 KiB
PHP
365 lines
9.1 KiB
PHP
<?php
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/**
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* @author Arthur Schiwon <blizzz@owncloud.com>
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Jakob Sack <mail@jakobsack.de>
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* @author Joas Schilling <nickvergessen@owncloud.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Michael Gapczynski <GapczynskiM@gmail.com>
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* @author michag86 <micha_g@arcor.de>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <icewind@owncloud.com>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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*
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program 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 License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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/*
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*
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* The following SQL statement is just a help for developers and will not be
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* executed!
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*
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* CREATE TABLE `groups` (
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* `gid` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
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* PRIMARY KEY (`gid`)
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* ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
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*
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* CREATE TABLE `group_user` (
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* `gid` varchar(64) COLLATE utf8_unicode_ci NOT NULL,
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* `uid` varchar(64) COLLATE utf8_unicode_ci NOT NULL
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* ) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
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*
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*/
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/**
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* Class for group management in a SQL Database (e.g. MySQL, SQLite)
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*/
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class OC_Group_Database extends OC_Group_Backend {
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/** @var string[] */
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private $groupCache = [];
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/** @var \OCP\IDBConnection */
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private $dbConn;
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/**
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* OC_Group_Database constructor.
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*
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* @param \OCP\IDBConnection|null $dbConn
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*/
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public function __construct(\OCP\IDBConnection $dbConn = null) {
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$this->dbConn = $dbConn;
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}
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/**
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* FIXME: This function should not be required!
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*/
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private function fixDI() {
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if ($this->dbConn === null) {
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$this->dbConn = \OC::$server->getDatabaseConnection();
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}
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}
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/**
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* Try to create a new group
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* @param string $gid The name of the group to create
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* @return bool
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*
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* Tries to create a new group. If the group name already exists, false will
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* be returned.
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*/
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public function createGroup( $gid ) {
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$this->fixDI();
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// Check cache first
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if (isset($this->groupCache[$gid])) {
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return false;
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} else {
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// Check for existence in DB
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$qb = $this->dbConn->getQueryBuilder();
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$cursor = $qb->select('gid')
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->from('groups')
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->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
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->execute();
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$result = $cursor->fetch();
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$cursor->closeCursor();
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if($result) {
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// Can not add an existing group
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// Add to cache
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$this->groupCache[$gid] = $gid;
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return false;
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}
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}
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// Add group and exit
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$qb = $this->dbConn->getQueryBuilder();
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$result = $qb->insert('groups')
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->setValue('gid', $qb->createNamedParameter($gid))
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->execute();
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if (!$result) {
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return false;
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}
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// Add to cache
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$this->groupCache[$gid] = $gid;
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return true;
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}
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/**
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* delete a group
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* @param string $gid gid of the group to delete
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* @return bool
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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 function deleteGroup( $gid ) {
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$this->fixDI();
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// Delete the group
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$qb = $this->dbConn->getQueryBuilder();
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$qb->delete('groups')
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->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
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->execute();
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// Delete the group-user relation
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$qb = $this->dbConn->getQueryBuilder();
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$qb->delete('group_user')
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->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
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->execute();
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// Delete the group-groupadmin relation
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$qb = $this->dbConn->getQueryBuilder();
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$qb->delete('group_admin')
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->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
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->execute();
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// Delete from cache
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unset($this->groupCache[$gid]);
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return true;
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}
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/**
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* is user in group?
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* @param string $uid uid of the user
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* @param string $gid gid of the group
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* @return bool
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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 function inGroup( $uid, $gid ) {
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$this->fixDI();
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// check
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$qb = $this->dbConn->getQueryBuilder();
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$cursor = $qb->select('uid')
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->from('group_user')
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->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
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->andWhere($qb->expr()->eq('uid', $qb->createNamedParameter($uid)))
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->execute();
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$result = $cursor->fetch();
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$cursor->closeCursor();
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return $result ? true : false;
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}
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/**
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* Add a user to a group
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* @param string $uid Name of the user to add to group
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* @param string $gid Name of the group in which add the user
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* @return bool
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*
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* Adds a user to a group.
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*/
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public function addToGroup( $uid, $gid ) {
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$this->fixDI();
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// No duplicate entries!
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if( !$this->inGroup( $uid, $gid )) {
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$qb = $this->dbConn->getQueryBuilder();
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$qb->insert('group_user')
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->setValue('uid', $qb->createNamedParameter($uid))
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->setValue('gid', $qb->createNamedParameter($gid))
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->execute();
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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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* Removes a user from a group
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* @param string $uid Name of the user to remove from group
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* @param string $gid Name of the group from which remove the user
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* @return bool
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*
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* removes the user from a group.
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*/
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public function removeFromGroup( $uid, $gid ) {
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$this->fixDI();
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$qb = $this->dbConn->getQueryBuilder();
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$qb->delete('group_user')
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->where($qb->expr()->eq('uid', $qb->createNamedParameter($uid)))
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->andWhere($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
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->execute();
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return true;
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}
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/**
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* Get all groups a user belongs to
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* @param string $uid Name of the user
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* @return array an array of 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 function getUserGroups( $uid ) {
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$this->fixDI();
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// No magic!
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$qb = $this->dbConn->getQueryBuilder();
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$cursor = $qb->select('gid')
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->from('group_user')
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->where($qb->expr()->eq('uid', $qb->createNamedParameter($uid)))
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->execute();
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$groups = [];
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while( $row = $cursor->fetch()) {
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$groups[] = $row["gid"];
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$this->groupCache[$row['gid']] = $row['gid'];
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}
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$cursor->closeCursor();
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return $groups;
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}
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/**
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* get a list of all groups
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* @param string $search
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* @param int $limit
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* @param int $offset
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* @return array an array of group names
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*
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* Returns a list with all groups
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*/
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public function getGroups($search = '', $limit = null, $offset = null) {
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$parameters = [];
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$searchLike = '';
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if ($search !== '') {
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$parameters[] = '%' . $search . '%';
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$searchLike = ' WHERE LOWER(`gid`) LIKE LOWER(?)';
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}
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$stmt = OC_DB::prepare('SELECT `gid` FROM `*PREFIX*groups`' . $searchLike . ' ORDER BY `gid` ASC', $limit, $offset);
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$result = $stmt->execute($parameters);
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$groups = array();
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while ($row = $result->fetchRow()) {
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$groups[] = $row['gid'];
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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 $gid
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* @return bool
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*/
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public function groupExists($gid) {
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$this->fixDI();
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// Check cache first
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if (isset($this->groupCache[$gid])) {
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return true;
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}
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$qb = $this->dbConn->getQueryBuilder();
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$cursor = $qb->select('gid')
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->from('groups')
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->where($qb->expr()->eq('gid', $qb->createNamedParameter($gid)))
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->execute();
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$result = $cursor->fetch();
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$cursor->closeCursor();
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if ($result !== false) {
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$this->groupCache[$gid] = $gid;
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return true;
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}
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return false;
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}
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/**
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* get a list of all users in a group
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* @param string $gid
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* @param string $search
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* @param int $limit
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* @param int $offset
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* @return array an array of user ids
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*/
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public function usersInGroup($gid, $search = '', $limit = null, $offset = null) {
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$parameters = [$gid];
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$searchLike = '';
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if ($search !== '') {
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$parameters[] = '%' . $search . '%';
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$searchLike = ' AND `uid` LIKE ?';
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}
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$stmt = OC_DB::prepare('SELECT `uid` FROM `*PREFIX*group_user` WHERE `gid` = ?' . $searchLike . ' ORDER BY `uid` ASC',
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$limit,
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$offset);
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$result = $stmt->execute($parameters);
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$users = array();
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while ($row = $result->fetchRow()) {
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$users[] = $row['uid'];
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}
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return $users;
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}
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/**
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* get the number of all users matching the search string in a group
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* @param string $gid
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* @param string $search
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* @return int|false
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* @throws \OC\DatabaseException
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*/
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public function countUsersInGroup($gid, $search = '') {
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$parameters = [$gid];
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$searchLike = '';
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if ($search !== '') {
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$parameters[] = '%' . $search . '%';
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$searchLike = ' AND `uid` LIKE ?';
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}
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$stmt = OC_DB::prepare('SELECT COUNT(`uid`) AS `count` FROM `*PREFIX*group_user` WHERE `gid` = ?' . $searchLike);
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$result = $stmt->execute($parameters);
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$count = $result->fetchOne();
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if($count !== false) {
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$count = intval($count);
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}
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return $count;
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}
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}
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