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<?php
/**
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Joas Schilling <nickvergessen@owncloud.com>
* @author Morris Jobke <hey@morrisjobke.de>
*
* @copyright Copyright (c) 2016, ownCloud, Inc.
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program 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, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OCA\User_LDAP\Jobs;
use \OC\BackgroundJob\TimedJob;
use \OCA\User_LDAP\User_LDAP;
use \OCA\User_LDAP\User_Proxy;
use \OCA\User_LDAP\Helper;
use \OCA\User_LDAP\LDAP;
use \OCA\User_LDAP\User\DeletedUsersIndex;
use \OCA\User_LDAP\Mapping\UserMapping;
/**
* Class CleanUp
*
* a Background job to clean up deleted users
*
* @package OCA\User_LDAP\Jobs;
*/
class CleanUp extends TimedJob {
/** @var int $limit amount of users that should be checked per run */
protected $limit = 50;
/** @var int $defaultIntervalMin default interval in minutes */
protected $defaultIntervalMin = 51;
/** @var User_LDAP|User_Proxy $userBackend */
protected $userBackend;
/** @var \OCP\IConfig $ocConfig */
protected $ocConfig;
/** @var \OCP\IDBConnection $db */
protected $db;
/** @var Helper $ldapHelper */
protected $ldapHelper;
/** @var \OCA\User_LDAP\Mapping\UserMapping */
protected $mapping;
/** @var \OCA\User_LDAP\User\DeletedUsersIndex */
protected $dui;
public function __construct() {
$minutes = \OC::$server->getConfig()->getSystemValue(
'ldapUserCleanupInterval', strval($this->defaultIntervalMin));
$this->setInterval(intval($minutes) * 60);
}
/**
* assigns the instances passed to run() to the class properties
* @param array $arguments
*/
public function setArguments($arguments) {
//Dependency Injection is not possible, because the constructor will
//only get values that are serialized to JSON. I.e. whatever we would
//pass in app.php we do add here, except something else is passed e.g.
//in tests.
if(isset($arguments['helper'])) {
$this->ldapHelper = $arguments['helper'];
} else {
$this->ldapHelper = new Helper();
}
if(isset($arguments['ocConfig'])) {
$this->ocConfig = $arguments['ocConfig'];
} else {
$this->ocConfig = \OC::$server->getConfig();
}
if(isset($arguments['userBackend'])) {
$this->userBackend = $arguments['userBackend'];
} else {
$this->userBackend = new User_Proxy(
$this->ldapHelper->getServerConfigurationPrefixes(true),
new LDAP(),
$this->ocConfig
);
}
if(isset($arguments['db'])) {
$this->db = $arguments['db'];
} else {
$this->db = \OC::$server->getDatabaseConnection();
}
if(isset($arguments['mapping'])) {
$this->mapping = $arguments['mapping'];
} else {
$this->mapping = new UserMapping($this->db);
}
if(isset($arguments['deletedUsersIndex'])) {
$this->dui = $arguments['deletedUsersIndex'];
} else {
$this->dui = new DeletedUsersIndex(
$this->ocConfig, $this->db, $this->mapping);
}
}
/**
* makes the background job do its work
* @param array $argument
*/
public function run($argument) {
$this->setArguments($argument);
if(!$this->isCleanUpAllowed()) {
return;
}
$users = $this->mapping->getList($this->getOffset(), $this->limit);
if(!is_array($users)) {
//something wrong? Let's start from the beginning next time and
//abort
$this->setOffset(true);
return;
}
$resetOffset = $this->isOffsetResetNecessary(count($users));
$this->checkUsers($users);
$this->setOffset($resetOffset);
}
/**
* checks whether next run should start at 0 again
* @param int $resultCount
* @return bool
*/
public function isOffsetResetNecessary($resultCount) {
return ($resultCount < $this->limit) ? true : false;
}
/**
* checks whether cleaning up LDAP users is allowed
* @return bool
*/
public function isCleanUpAllowed() {
try {
if($this->ldapHelper->haveDisabledConfigurations()) {
return false;
}
} catch (\Exception $e) {
return false;
}
$enabled = $this->isCleanUpEnabled();
return $enabled;
}
/**
* checks whether clean up is enabled by configuration
* @return bool
*/
private function isCleanUpEnabled() {
return (bool)$this->ocConfig->getSystemValue(
'ldapUserCleanupInterval', strval($this->defaultIntervalMin));
}
/**
* checks users whether they are still existing
* @param array $users result from getMappedUsers()
*/
private function checkUsers(array $users) {
foreach($users as $user) {
$this->checkUser($user);
}
}
/**
* checks whether a user is still existing in LDAP
* @param string[] $user
*/
private function checkUser(array $user) {
if($this->userBackend->userExistsOnLDAP($user['name'])) {
//still available, all good
return;
}
$this->dui->markUser($user['name']);
}
/**
* gets the offset to fetch users from the mappings table
* @return int
*/
private function getOffset() {
return intval($this->ocConfig->getAppValue('user_ldap', 'cleanUpJobOffset', 0));
}
/**
* sets the new offset for the next run
* @param bool $reset whether the offset should be set to 0
*/
public function setOffset($reset = false) {
$newOffset = $reset ? 0 :
$this->getOffset() + $this->limit;
$this->ocConfig->setAppValue('user_ldap', 'cleanUpJobOffset', $newOffset);
}
/**
* returns the chunk size (limit in DB speak)
* @return int
*/
public function getChunkSize() {
return $this->limit;
}
}
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