git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/mrf/vocabulary_policy.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.ActivityPub.MRF.VocabularyPolicy do
   6   @moduledoc "Filter messages which belong to certain activity vocabularies"
   7
   8   @behaviour Pleroma.Web.ActivityPub.MRF
   9
  10   def filter(%{"type" => "Undo", "object" => child_message} = message) do
  11     with {:ok, _} <- filter(child_message) do
  12       {:ok, message}
  13     else
  14       {:reject, nil} ->
  15         {:reject, nil}
  16     end
  17   end
  18
  19   def filter(%{"type" => message_type} = message) do
  20     with accepted_vocabulary <- Pleroma.Config.get([:mrf_vocabulary, :accept]),
  21          rejected_vocabulary <- Pleroma.Config.get([:mrf_vocabulary, :reject]),
  22          true <-
  23            Enum.empty?(accepted_vocabulary) || Enum.member?(accepted_vocabulary, message_type),
  24          false <-
  25            length(rejected_vocabulary) > 0 && Enum.member?(rejected_vocabulary, message_type),
  26          {:ok, _} <- filter(message["object"]) do
  27       {:ok, message}
  28     else
  29       _ -> {:reject, nil}
  30     end
  31   end
  32
  33   def filter(message), do: {:ok, message}
  34
  35   def describe,
  36     do: {:ok, %{mrf_vocabulary: Pleroma.Config.get(:mrf_vocabulary) |> Enum.into(%{})}}
  37 end