owncloud/core

<?php
/**
 * @author Lukas Reschke <lukas@statuscode.ch>
 *
 * @copyright Copyright (c) 2018, ownCloud GmbH
 * @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\Files\BackgroundJob;

use OC\Files\Utils\Scanner;
use OCP\IConfig;
use OCP\IDBConnection;
use OCP\ILogger;
use OCP\IUser;
use OCP\IUserManager;

/**
 * Class ScanFiles is a background job used to run the file scanner over the user
 * accounts to ensure integrity of the file cache.
 *
 * @package OCA\Files\BackgroundJob
 */
class ScanFiles extends \OC\BackgroundJob\TimedJob {
    /** @var IConfig */
    private $config;
    /** @var IUserManager */
    private $userManager;
    /** @var IDBConnection */
    private $dbConnection;
    /** @var ILogger */
    private $logger;
    /** Amount of users that should get scanned per execution */
    public const USERS_PER_SESSION = 500;

    /**
     * @param IConfig|null $config
     * @param IUserManager|null $userManager
     * @param ILogger|null $logger
     */
    public function __construct(
        IConfig $config = null,
        IUserManager $userManager = null,
        ILogger $logger = null
    ) {
        // Run once per 10 minutes
        $this->setInterval(60 * 10);

        if ($userManager === null || $config === null) {
            $this->fixDIForJobs();
        } else {
            $this->config = $config;
            $this->userManager = $userManager;
            $this->logger = $logger;
        }
    }

    protected function fixDIForJobs() {
        $this->config = \OC::$server->getConfig();
        $this->userManager = \OC::$server->getUserManager();
        $this->logger = \OC::$server->getLogger();
    }

    /**
     * @param IUser $user
     */
    protected function runScanner(IUser $user) {
        try {
            $scanner = new Scanner(
                $user->getUID(),
                $this->dbConnection,
                $this->logger
            );
            $scanner->backgroundScan('');
        } catch (\Exception $e) {
            $this->logger->logException($e, ['app' => 'files']);
        }
        \OC_Util::tearDownFS();
    }

    /**
     * @param $argument
     * @throws \Exception
     */
    protected function run($argument) {
        $offset = $this->config->getAppValue('files', 'cronjob_scan_files', 0);
        $users = $this->userManager->search('', self::USERS_PER_SESSION, $offset);
        if (!\count($users)) {
            // No users found, reset offset and retry
            $offset = 0;
            $users = $this->userManager->search('', self::USERS_PER_SESSION);
        }

        $offset += self::USERS_PER_SESSION;
        $this->config->setAppValue('files', 'cronjob_scan_files', $offset);

        foreach ($users as $user) {
            $this->runScanner($user);
        }
    }
}