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<?php
/**
* @copyright Copyright (c) 2017 Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OCA\User_LDAP\Jobs;
use OC\BackgroundJob\TimedJob;
use OC\ServerNotAvailableException;
use OCA\User_LDAP\Access;
use OCA\User_LDAP\AccessFactory;
use OCA\User_LDAP\Configuration;
use OCA\User_LDAP\Connection;
use OCA\User_LDAP\ConnectionFactory;
use OCA\User_LDAP\FilesystemHelper;
use OCA\User_LDAP\Helper;
use OCA\User_LDAP\LDAP;
use OCA\User_LDAP\LogWrapper;
use OCA\User_LDAP\Mapping\UserMapping;
use OCA\User_LDAP\User\Manager;
use OCP\IAvatarManager;
use OCP\IConfig;
use OCP\IDBConnection;
use OCP\Image;
use OCP\IUserManager;
use OCP\Notification\IManager;
class Sync extends TimedJob {
const MAX_INTERVAL = 12 * 60 * 60; // 12h
const MIN_INTERVAL = 30 * 60; // 30min
/** @var Helper */
protected $ldapHelper;
/** @var LDAP */
protected $ldap;
/** @var Manager */
protected $userManager;
/** @var UserMapping */
protected $mapper;
/** @var IConfig */
protected $config;
/** @var IAvatarManager */
protected $avatarManager;
/** @var IDBConnection */
protected $dbc;
/** @var IUserManager */
protected $ncUserManager;
/** @var IManager */
protected $notificationManager;
/** @var ConnectionFactory */
protected $connectionFactory;
/** @var AccessFactory */
protected $accessFactory;
public function __construct() {
$this->setInterval(
\OC::$server->getConfig()->getAppValue(
'user_ldap',
'background_sync_interval',
self::MIN_INTERVAL
)
);
}
/**
* updates the interval
*
* the idea is to adjust the interval depending on the amount of known users
* and the attempt to update each user one day. At most it would run every
* 30 minutes, and at least every 12 hours.
*/
public function updateInterval() {
$minPagingSize = $this->getMinPagingSize();
$mappedUsers = $this->mapper->count();
$runsPerDay = ($minPagingSize === 0 || $mappedUsers === 0) ? self::MAX_INTERVAL
: $mappedUsers / $minPagingSize;
$interval = floor(24 * 60 * 60 / $runsPerDay);
$interval = min(max($interval, self::MIN_INTERVAL), self::MAX_INTERVAL);
$this->config->setAppValue('user_ldap', 'background_sync_interval', $interval);
}
/**
* returns the smallest configured paging size
* @return int
*/
protected function getMinPagingSize() {
$configKeys = $this->config->getAppKeys('user_ldap');
$configKeys = array_filter($configKeys, function($key) {
return strpos($key, 'ldap_paging_size') !== false;
});
$minPagingSize = null;
foreach ($configKeys as $configKey) {
$pagingSize = $this->config->getAppValue('user_ldap', $configKey, $minPagingSize);
$minPagingSize = $minPagingSize === null ? $pagingSize : min($minPagingSize, $pagingSize);
}
return (int)$minPagingSize;
}
/**
* @param array $argument
*/
public function run($argument) {
$this->setArgument($argument);
$isBackgroundJobModeAjax = $this->config
->getAppValue('core', 'backgroundjobs_mode', 'ajax') === 'ajax';
if($isBackgroundJobModeAjax) {
return;
}
$cycleData = $this->getCycle();
if($cycleData === null) {
$cycleData = $this->determineNextCycle();
if($cycleData === null) {
$this->updateInterval();
return;
}
}
if(!$this->qualifiesToRun($cycleData)) {
$this->updateInterval();
return;
}
try {
$expectMoreResults = $this->runCycle($cycleData);
if ($expectMoreResults) {
$this->increaseOffset($cycleData);
} else {
$this->determineNextCycle($cycleData);
}
$this->updateInterval();
} catch (ServerNotAvailableException $e) {
$this->determineNextCycle($cycleData);
}
}
/**
* @param array $cycleData
* @return bool whether more results are expected from the same configuration
*/
public function runCycle($cycleData) {
$connection = $this->connectionFactory->get($cycleData['prefix']);
$access = $this->accessFactory->get($connection);
$access->setUserMapper($this->mapper);
$filter = $access->combineFilterWithAnd(array(
$access->connection->ldapUserFilter,
$access->connection->ldapUserDisplayName . '=*',
$access->getFilterPartForUserSearch('')
));
$results = $access->fetchListOfUsers(
$filter,
$access->userManager->getAttributes(),
$connection->ldapPagingSize,
$cycleData['offset'],
true
);
if((int)$connection->ldapPagingSize === 0) {
return false;
}
return count($results) >= (int)$connection->ldapPagingSize;
}
/**
* returns the info about the current cycle that should be run, if any,
* otherwise null
*
* @return array|null
*/
public function getCycle() {
$prefixes = $this->ldapHelper->getServerConfigurationPrefixes(true);
if(count($prefixes) === 0) {
return null;
}
$cycleData = [
'prefix' => $this->config->getAppValue('user_ldap', 'background_sync_prefix', null),
'offset' => (int)$this->config->getAppValue('user_ldap', 'background_sync_offset', 0),
];
if(
$cycleData['prefix'] !== null
&& in_array($cycleData['prefix'], $prefixes)
) {
return $cycleData;
}
return null;
}
/**
* Save the provided cycle information in the DB
*
* @param array $cycleData
*/
public function setCycle(array $cycleData) {
$this->config->setAppValue('user_ldap', 'background_sync_prefix', $cycleData['prefix']);
$this->config->setAppValue('user_ldap', 'background_sync_offset', $cycleData['offset']);
}
/**
* returns data about the next cycle that should run, if any, otherwise
* null. It also always goes for the next LDAP configuration!
*
* @param array|null $cycleData the old cycle
* @return array|null
*/
public function determineNextCycle(array $cycleData = null) {
$prefixes = $this->ldapHelper->getServerConfigurationPrefixes(true);
if(count($prefixes) === 0) {
return null;
}
// get the next prefix in line and remember it
$oldPrefix = $cycleData === null ? null : $cycleData['prefix'];
$prefix = $this->getNextPrefix($oldPrefix);
if($prefix === null) {
return null;
}
$cycleData['prefix'] = $prefix;
$cycleData['offset'] = 0;
$this->setCycle(['prefix' => $prefix, 'offset' => 0]);
return $cycleData;
}
/**
* Checks whether the provided cycle should be run. Currently only the
* last configuration change goes into account (at least one hour).
*
* @param $cycleData
* @return bool
*/
public function qualifiesToRun($cycleData) {
$lastChange = $this->config->getAppValue('user_ldap', $cycleData['prefix'] . '_lastChange', 0);
if((time() - $lastChange) > 60 * 30) {
return true;
}
return false;
}
/**
* increases the offset of the current cycle for the next run
*
* @param $cycleData
*/
protected function increaseOffset($cycleData) {
$ldapConfig = new Configuration($cycleData['prefix']);
$cycleData['offset'] += (int)$ldapConfig->ldapPagingSize;
$this->setCycle($cycleData);
}
/**
* determines the next configuration prefix based on the last one (if any)
*
* @param string|null $lastPrefix
* @return string|null
*/
protected function getNextPrefix($lastPrefix) {
$prefixes = $this->ldapHelper->getServerConfigurationPrefixes(true);
$noOfPrefixes = count($prefixes);
if($noOfPrefixes === 0) {
return null;
}
$i = $lastPrefix === null ? false : array_search($lastPrefix, $prefixes, true);
if($i === false) {
$i = -1;
} else {
$i++;
}
if(!isset($prefixes[$i])) {
$i = 0;
}
return $prefixes[$i];
}
/**
* "fixes" DI
*
* @param array $argument
*/
public function setArgument($argument) {
if(isset($argument['config'])) {
$this->config = $argument['config'];
} else {
$this->config = \OC::$server->getConfig();
}
if(isset($argument['helper'])) {
$this->ldapHelper = $argument['helper'];
} else {
$this->ldapHelper = new Helper($this->config);
}
if(isset($argument['ldapWrapper'])) {
$this->ldap = $argument['ldapWrapper'];
} else {
$this->ldap = new LDAP();
}
if(isset($argument['avatarManager'])) {
$this->avatarManager = $argument['avatarManager'];
} else {
$this->avatarManager = \OC::$server->getAvatarManager();
}
if(isset($argument['dbc'])) {
$this->dbc = $argument['dbc'];
} else {
$this->dbc = \OC::$server->getDatabaseConnection();
}
if(isset($argument['ncUserManager'])) {
$this->ncUserManager = $argument['ncUserManager'];
} else {
$this->ncUserManager = \OC::$server->getUserManager();
}
if(isset($argument['notificationManager'])) {
$this->notificationManager = $argument['notificationManager'];
} else {
$this->notificationManager = \OC::$server->getNotificationManager();
}
if(isset($argument['userManager'])) {
$this->userManager = $argument['userManager'];
} else {
$this->userManager = new Manager(
$this->config,
new FilesystemHelper(),
new LogWrapper(),
$this->avatarManager,
new Image(),
$this->dbc,
$this->ncUserManager,
$this->notificationManager
);
}
if(isset($argument['mapper'])) {
$this->mapper = $argument['mapper'];
} else {
$this->mapper = new UserMapping($this->dbc);
}
if(isset($argument['connectionFactory'])) {
$this->connectionFactory = $argument['connectionFactory'];
} else {
$this->connectionFactory = new ConnectionFactory($this->ldap);
}
if(isset($argument['accessFactory'])) {
$this->accessFactory = $argument['accessFactory'];
} else {
$this->accessFactory = new AccessFactory(
$this->ldap,
$this->userManager,
$this->ldapHelper,
$this->config
);
}
}
}