def normalize(obj) when is_map(obj), do: Activity.get_by_ap_id(obj["id"])
def normalize(ap_id) when is_binary(ap_id), do: Activity.get_by_ap_id(ap_id)
def normalize(_), do: nil
def normalize(obj) when is_map(obj), do: Activity.get_by_ap_id(obj["id"])
def normalize(ap_id) when is_binary(ap_id), do: Activity.get_by_ap_id(ap_id)
def normalize(_), do: nil