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# Pleroma: A lightweight social networking server
# Copyright © 2017-2024 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.MRF.ForceMention do
require Pleroma.Constants
alias Pleroma.Config
alias Pleroma.Object
alias Pleroma.User
@behaviour Pleroma.Web.ActivityPub.MRF.Policy
defp get_author(url) do
with %Object{data: %{"actor" => actor}} <- Object.normalize(url, fetch: false),
%User{ap_id: ap_id, nickname: nickname} <- User.get_cached_by_ap_id(actor) do
%{"type" => "Mention", "href" => ap_id, "name" => "@#{nickname}"}
else
_ -> nil
end
end
defp prepend_author(tags, _, false), do: tags
defp prepend_author(tags, nil, _), do: tags
defp prepend_author(tags, url, _) do
actor = get_author(url)
if not is_nil(actor) do
[actor | tags]
else
tags
end
end
@impl true
def filter(%{"type" => "Create", "object" => %{"tag" => tag} = object} = activity) do
tag =
tag
|> prepend_author(
object["inReplyTo"],
Config.get([:mrf_force_mention, :mention_parent, true])
)
|> prepend_author(
object["quoteUrl"],
Config.get([:mrf_force_mention, :mention_quoted, true])
)
|> Enum.uniq()
{:ok, put_in(activity["object"]["tag"], tag)}
end
@impl true
def filter(object), do: {:ok, object}
@impl true
def describe, do: {:ok, %{}}
end
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