/**

*

* @package phpBB3

* @version $Id: cron.php 8479 2008-03-29 00:22:48Z naderman $

* @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', '');

$use_shutdown_function = (@function_exists('register_shutdown_function')) ? true : false;

// Output transparent gif

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

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

header('Content-length: 43');

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

// test without flush ;)

// 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;

		}

		// A user reported using the mail() function while using shutdown does not work. We do not want to risk that.

		if ($use_shutdown_function && !$config['smtp_delivery'])

		{

			$use_shutdown_function = false;

		}

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

		$queue = new queue();

		if ($use_shutdown_function)

		{

			register_shutdown_function(array(&$queue, 'process'));

		}

		else

		{

			$queue->process();

		}

	break;

	case 'tidy_cache':

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

		{

			break;

		}

		if ($use_shutdown_function)

		{

			register_shutdown_function(array(&$cache, 'tidy'));

		}

		else

		{

			$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;

		}

		if ($use_shutdown_function)

		{

			register_shutdown_function(array(&$search, 'tidy'));

		}

		else

		{

			$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);

		if ($use_shutdown_function)

		{

			register_shutdown_function('tidy_warnings');

		}

		else

		{

			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);

		if ($use_shutdown_function)

		{

			register_shutdown_function('tidy_database');

		}

		else

		{

			tidy_database();

		}

	break;

	case 'tidy_sessions':

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

		{

			break;

		}

		if ($use_shutdown_function)

		{

			register_shutdown_function(array(&$user, 'session_gc'));

		}

		else

		{

			$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'])

			{

				if ($use_shutdown_function)

				{

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

				}

				else

				{

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

				}

			}

			if ($row['prune_viewed'])

			{

				if ($use_shutdown_function)

				{

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

				}

				else

				{

					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.

if ($use_shutdown_function)

{

	register_shutdown_function('unlock_cron');

	register_shutdown_function('garbage_collection');

}

else

{

	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);

}

?>