# Pleroma: A lightweight social networking server # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/> # SPDX-License-Identifier: AGPL-3.0-only defmodule Pleroma.Web.ActivityPub.MRF.VocabularyPolicy do @moduledoc "Filter messages which belong to certain activity vocabularies" @behaviour Pleroma.Web.ActivityPub.MRF def filter(%{"type" => "Undo", "object" => child_message} = message) do with {:ok, _} <- filter(child_message) do {:ok, message} else {:reject, nil} -> {:reject, nil} end end def filter(%{"type" => message_type} = message) do with accepted_vocabulary <- Pleroma.Config.get([:mrf_vocabulary, :accept]), rejected_vocabulary <- Pleroma.Config.get([:mrf_vocabulary, :reject]), true <- length(accepted_vocabulary) == 0 || Enum.member?(accepted_vocabulary, message_type), false <- length(rejected_vocabulary) > 0 && Enum.member?(rejected_vocabulary, message_type), {:ok, _} <- filter(message["object"]) do {:ok, message} else _ -> {:reject, nil} end end def filter(message), do: {:ok, message} def describe, do: {:ok, %{mrf_vocabulary: Pleroma.Config.get(:mrf_vocabulary) |> Enum.into(%{})}} end