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   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.Web.ActivityPub.MRF.NormalizeMarkup do
   6   @moduledoc "Scrub configured hypertext markup"
   7   alias Pleroma.HTML
   8
   9   @behaviour Pleroma.Web.ActivityPub.MRF
  10
  11   @impl true
  12   def filter(%{"type" => "Create", "object" => child_object} = object) do
  13     scrub_policy = Pleroma.Config.get([:mrf_normalize_markup, :scrub_policy])
  14
  15     content =
  16       child_object["content"]
  17       |> HTML.filter_tags(scrub_policy)
  18
  19     object = put_in(object, ["object", "content"], content)
  20
  21     {:ok, object}
  22   end
  23
  24   def filter(object), do: {:ok, object}
  25
  26   @impl true
  27   def describe, do: {:ok, %{}}
  28
  29   @impl true
  30   def config_description do
  31     %{
  32       key: :mrf_normalize_markup,
  33       related_policy: "Pleroma.Web.ActivityPub.MRF.NormalizeMarkup",
  34       label: "MRF Normalize Markup",
  35       description: "MRF NormalizeMarkup settings. Scrub configured hypertext markup.",
  36       children: [
  37         %{
  38           key: :scrub_policy,
  39           type: :module,
  40           suggestions: [Pleroma.HTML.Scrubber.Default]
  41         }
  42       ]
  43     }
  44   end
  45 end