public function remove()
{
$collection = $this->param("collection", null);
if ($collection) {
$col = "collection" . $collection["_id"];
$this->app->db->dropCollection("collections/{$col}");
$this->app->db->remove("common/collections", ["_id" => $collection["_id"]]);
}
return $collection ? '{"success":true}' : '{"success":false}';
}