# Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.AntiFollowbotPolicy do
alias Pleroma.User
+ @moduledoc "Prevent followbots from following with a bit of heuristic"
+
@behaviour Pleroma.Web.ActivityPub.MRF
# XXX: this should become User.normalize_by_ap_id() or similar, really.
defp score_displayname(_), do: 0.0
defp determine_if_followbot(%User{nickname: nickname, name: displayname}) do
+ # nickname will be a binary string except when following a relay
nick_score =
- nickname
- |> String.downcase()
- |> score_nickname()
+ if is_binary(nickname) do
+ nickname
+ |> String.downcase()
+ |> score_nickname()
+ else
+ 0.0
+ end
+ # displayname will either be a binary string or nil, if a displayname isn't set.
name_score =
- displayname
- |> String.downcase()
- |> score_displayname()
+ if is_binary(displayname) do
+ displayname
+ |> String.downcase()
+ |> score_displayname()
+ else
+ 0.0
+ end
nick_score + name_score
end
@impl true
def filter(message), do: {:ok, message}
+
+ @impl true
+ def describe, do: {:ok, %{}}
end