config :pleroma, :mrf_subchain, match_actor: %{}
+config :pleroma, :mrf_vocabulary,
+ accept: [],
+ reject: []
+
config :pleroma, :rich_media,
enabled: true,
ignore_hosts: [],
--- /dev/null
+# 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}
+end