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<?php

/**

*

* @package phpBB3

* @version $Id$

* @copyright (c) 2005 phpBB Group

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

*

*/

/**

*/

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);

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

// 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();

if (!isset($config['cron_lock']))

{

        set_config('cron_lock', '0', true);

}

// make sure cron doesn't run multiple times in parallel

if ($config['cron_lock'])

{

        // if the other process is running more than an hour already we have to assume it

        // aborted without cleaning the lock

        $time = explode(' ', $config['cron_lock']);

        $time = $time[0];

        if ($time + 3600 >= time())

        {

                exit;

        }

}

define('CRON_ID', time() . ' ' . unique_id());

$sql = 'UPDATE ' . CONFIG_TABLE . "

        SET config_value = '" . $db->sql_escape(CRON_ID) . "'

        WHERE config_name = 'cron_lock' AND config_value = '" . $db->sql_escape($config['cron_lock']) . "'";

$db->sql_query($sql);

// another cron process altered the table between script start and UPDATE query so exit

if ($db->sql_affectedrows() != 1)

{

        exit;

}

/**

* Run cron-like action

* Real cron-based layer will be introduced in 3.2

*/

switch ($cron_type)

{

        case 'queue':

                if (time() - $config['queue_interval'] <= $config['last_queue_run'] || !file_exists($phpbb_root_path . 'cache/queue.' . $phpEx))

                {

                        break;

                }

                include_once($phpbb_root_path . 'includes/functions_messenger.' . $phpEx);

                $queue = new queue();

                $queue->process();

        break;

        case 'tidy_cache':

                if (time() - $config['cache_gc'] <= $config['cache_last_gc'] || !method_exists($cache, 'tidy'))

                {

                        break;

                }

                $cache->tidy();

        break;

        case 'tidy_search':

                // Select the search method

                $search_type = basename($config['search_type']);

                if (time() - $config['search_gc'] <= $config['search_last_gc'] || !file_exists($phpbb_root_path . 'includes/search/' . $search_type . '.' . $phpEx))

                {

                        break;

                }

                include_once("{$phpbb_root_path}includes/search/$search_type.$phpEx");

                // We do some additional checks in the module to ensure it can actually be utilised

                $error = false;

                $search = new $search_type($error);

                if ($error)

                {

                        break;

                }

                $search->tidy();

        break;

        case 'tidy_warnings':

                if (time() - $config['warnings_gc'] <= $config['warnings_last_gc'])

                {

                        break;

                }

                include_once($phpbb_root_path . 'includes/functions_admin.' . $phpEx);

                tidy_warnings();

        break;

        case 'tidy_database':

                if (time() - $config['database_gc'] <= $config['database_last_gc'])

                {

                        break;

                }

                include_once($phpbb_root_path . 'includes/functions_admin.' . $phpEx);

                tidy_database();

        break;

        case 'tidy_sessions':

                if (time() - $config['session_gc'] <= $config['session_last_gc'])

                {

                        break;

                }

                $user->session_gc();

        break;

        case 'prune_forum':

                $forum_id = request_var('f', 0);

                $sql = 'SELECT forum_id, prune_next, enable_prune, prune_days, prune_viewed, forum_flags, prune_freq

                        FROM ' . FORUMS_TABLE . "

                        WHERE forum_id = $forum_id";

                $result = $db->sql_query($sql);

                $row = $db->sql_fetchrow($result);

                $db->sql_freeresult($result);

                if (!$row)

                {

                        break;

                }

                // Do the forum Prune thang

                if ($row['prune_next'] < time() && $row['enable_prune'])

                {

                        include_once($phpbb_root_path . 'includes/functions_admin.' . $phpEx);

                        if ($row['prune_days'])

                        {

                                auto_prune($row['forum_id'], 'posted', $row['forum_flags'], $row['prune_days'], $row['prune_freq']);

                        }

                        if ($row['prune_viewed'])

                        {

                                auto_prune($row['forum_id'], 'viewed', $row['forum_flags'], $row['prune_viewed'], $row['prune_freq']);

                        }

                }

        break;

}

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

unlock_cron();

garbage_collection();

exit;

/**

* Unlock cron script

*/

function unlock_cron()

{

        global $db;

        $sql = 'UPDATE ' . CONFIG_TABLE . "

                SET config_value = '0'

                WHERE config_name = 'cron_lock' AND config_value = '" . $db->sql_escape(CRON_ID) . "'";

        $db->sql_query($sql);

}

?>