akkoma/lib/pleroma/web/activity_pub/mrf/simple_policy.ex
William Pitcock 60d6038be5 mrf simple: add accept lists
accept lists supplement reject lists by requiring that any message accepted by contained
by the accept list.

in other words, this functionality can be used to implement instances similar to
awoo.space.
2018-06-19 21:28:24 +00:00

96 lines
2.8 KiB
Elixir

defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
alias Pleroma.User
@behaviour Pleroma.Web.ActivityPub.MRF
@mrf_policy Application.get_env(:pleroma, :mrf_simple)
@accept Keyword.get(@mrf_policy, :accept)
defp check_accept(actor_info, object) do
if length(@accept) > 0 and not actor_info.host in @accept do
{:reject, nil}
else
{:ok, object}
end
end
@reject Keyword.get(@mrf_policy, :reject)
defp check_reject(actor_info, object) do
if actor_info.host in @reject do
{:reject, nil}
else
{:ok, object}
end
end
@media_removal Keyword.get(@mrf_policy, :media_removal)
defp check_media_removal(actor_info, object) do
if actor_info.host in @media_removal do
child_object = Map.delete(object["object"], "attachment")
object = Map.put(object, "object", child_object)
{:ok, object}
else
{:ok, object}
end
end
@media_nsfw Keyword.get(@mrf_policy, :media_nsfw)
defp check_media_nsfw(actor_info, object) do
child_object = object["object"]
if actor_info.host in @media_nsfw and child_object["attachment"] != nil and
length(child_object["attachment"]) > 0 do
tags = (child_object["tag"] || []) ++ ["nsfw"]
child_object = Map.put(child_object, "tags", tags)
child_object = Map.put(child_object, "sensitive", true)
object = Map.put(object, "object", child_object)
{:ok, object}
else
{:ok, object}
end
end
@ftl_removal Keyword.get(@mrf_policy, :federated_timeline_removal)
defp check_ftl_removal(actor_info, object) do
if actor_info.host in @ftl_removal do
user = User.get_by_ap_id(object["actor"])
# flip to/cc relationship to make the post unlisted
object =
if "https://www.w3.org/ns/activitystreams#Public" in object["to"] and
user.follower_address in object["cc"] do
to =
List.delete(object["to"], "https://www.w3.org/ns/activitystreams#Public") ++
[user.follower_address]
cc =
List.delete(object["cc"], user.follower_address) ++
["https://www.w3.org/ns/activitystreams#Public"]
object
|> Map.put("to", to)
|> Map.put("cc", cc)
else
object
end
{:ok, object}
else
{:ok, object}
end
end
@impl true
def filter(object) do
actor_info = URI.parse(object["actor"])
with {:ok, object} <- check_accept(actor_info, object),
{:ok, object} <- check_reject(actor_info, object),
{:ok, object} <- check_media_removal(actor_info, object),
{:ok, object} <- check_media_nsfw(actor_info, object),
{:ok, object} <- check_ftl_removal(actor_info, object) do
{:ok, object}
else
_e -> {:reject, nil}
end
end
end