git.squeep.com Git - akkoma/blob - lib/pleroma/web/activity_pub/mrf/force_bot_unlisted_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.ForceBotUnlistedPolicy do
   6   alias Pleroma.User
   7   @behaviour Pleroma.Web.ActivityPub.MRF
   8   @moduledoc "Remove bot posts from federated timeline"
   9
  10   require Pleroma.Constants
  11
  12   defp check_by_actor_type(user) do
  13     if user.actor_type in ["Application", "Service"], do: 1.0, else: 0.0
  14   end
  15
  16   defp check_by_nickname(user) do
  17     if Regex.match?(~r/bot@|ebooks@/i, user.nickname), do: 1.0, else: 0.0
  18   end
  19
  20   defp botness_score(user), do: check_by_actor_type(user) + check_by_nickname(user)
  21
  22   @impl true
  23   def filter(
  24         %{
  25           "type" => "Create",
  26           "to" => to,
  27           "cc" => cc,
  28           "actor" => actor,
  29           "object" => object
  30         } = message
  31       ) do
  32     user = User.get_cached_by_ap_id(actor)
  33     isbot = 0.8 < botness_score(user)
  34
  35     if isbot and Enum.member?(to, Pleroma.Constants.as_public()) do
  36       to = List.delete(to, Pleroma.Constants.as_public()) ++ [user.follower_address]
  37       cc = List.delete(cc, user.follower_address) ++ [Pleroma.Constants.as_public()]
  38
  39       object =
  40         object
  41         |> Map.put("to", to)
  42         |> Map.put("cc", cc)
  43
  44       message =
  45         message
  46         |> Map.put("to", to)
  47         |> Map.put("cc", cc)
  48         |> Map.put("object", object)
  49
  50       {:ok, message}
  51     else
  52       {:ok, message}
  53     end
  54   end
  55
  56   @impl true
  57   def filter(message), do: {:ok, message}
  58
  59   @impl true
  60   def describe, do: {:ok, %{}}
  61 end