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# 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)}}
end
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