public static function refresh_available_modules()
{
$module_dirs = ModuleManager::list_modules();
DB::Execute('TRUNCATE TABLE available_modules');
foreach ($module_dirs as $name => $v) {
foreach ($v as $ver => $u) {
DB::Execute('INSERT INTO available_modules VALUES(%s, %d, %s)', array($name, $ver, $u));
}
}
return $module_dirs;
}