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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.ActivityPub.MRF.UserAllowListPolicy do
   6   alias Pleroma.Config
   7
   8   @moduledoc "Accept-list of users from specified instances"
   9   @behaviour Pleroma.Web.ActivityPub.MRF
  10
  11   defp filter_by_list(object, []), do: {:ok, object}
  12
  13   defp filter_by_list(%{"actor" => actor} = object, allow_list) do
  14     if actor in allow_list do
  15       {:ok, object}
  16     else
  17       {:reject, nil}
  18     end
  19   end
  20
  21   @impl true
  22   def filter(%{"actor" => actor} = object) do
  23     actor_info = URI.parse(actor)
  24     allow_list = Config.get([:mrf_user_allowlist, String.to_atom(actor_info.host)], [])
  25
  26     filter_by_list(object, allow_list)
  27   end
  28
  29   def filter(object), do: {:ok, object}
  30 end