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<?php

/**

*

* @package phpBB3

* @copyright (c) 2005 phpBB Group

* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2

*

*/

/**

*/

define('IN_PHPBB', true);

define('IN_CRON', true);

$phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './';

$phpEx = substr(strrchr(__FILE__, '.'), 1);

include($phpbb_root_path . 'common.' . $phpEx);

// Do not update users last page entry

$user->session_begin(false);

$auth->acl($user->data);

function output_image()

{

        // Output transparent gif

        header('Cache-Control: no-cache');

        header('Content-type: image/gif');

        header('Content-length: 43');

        echo base64_decode('R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==');

        // Flush here to prevent browser from showing the page as loading while

        // running cron.

        flush();

}

function do_cron($cron_lock, $run_tasks)

{

        global $config;

        foreach ($run_tasks as $task)

        {

                if (defined('DEBUG_EXTRA') && $config['use_system_cron'])

                {

                        echo "[phpBB cron] Running task '{$task->get_name()}'\n";

                }

                $task->run();

        }

        // Unloading cache and closing db after having done the dirty work.

        $cron_lock->release();

        garbage_collection();

}

// Thanks to various fatal errors and lack of try/finally, it is quite easy to leave

// the cron lock locked, especially when working on cron-related code.

//

// Attempt to alleviate the problem by doing setup outside of the lock as much as possible.

//

// If DEBUG_EXTRA is defined and cron lock cannot be obtained, a message will be printed.

if ($config['use_system_cron'])

{

        $cron = new phpbb_cron_manager(new phpbb_cron_task_provider($phpbb_extension_manager), $cache->get_driver());

}

else

{

        $cron_type = request_var('cron_type', '');

        // Comment this line out for debugging so the page does not return an image.

        output_image();

}

$cron_lock = new phpbb_lock_db('cron_lock', $config, $db);

if ($cron_lock->acquire())

{

        if ($config['use_system_cron'])

        {

                $run_tasks = $cron->find_all_ready_tasks();

        }

        else

        {

                // If invalid task is specified, empty $run_tasks is passed to do_cron which then does nothing

                $run_tasks = array();

                $task = $cron->find_task($cron_type);

                if ($task)

                {

                        if ($task->is_parametrized())

                        {

                                $task->parse_parameters($request);

                        }

                        if ($task->is_ready())

                        {

                                $run_tasks = array($task);

                        }

                }

        }

        do_cron($cron_lock, $run_tasks);

}

else

{

        if (defined('DEBUG_EXTRA'))

        {

                echo "Could not obtain cron lock.\n";

        }

}