public static function sweep()
{
$watch_path = LookoutController::watchPath();
$inactive_users = array();
$orig_dir = getcwd();
chdir($watch_path);
$worked = false;
$watch_files = glob('*.sess');
foreach ($watch_files as $file) {
$file_access_time = fileatime($file);
$current_time = time();
$inactive = $current_time - $file_access_time > MAX_INACTIVE_TIME;
if ($inactive) {
$userid = explode('.', $file);
array_push($inactive_users, $userid[0]);
}
$worked = true;
}
chdir($orig_dir);
if (sizeof($inactive_users) > 0) {
LookoutController::deleteInactiveWatch($inactive_users);
AuthenticationController::autoLogout($inactive_users);
$worked = true;
}
return $worked;
}
