forked from AkkomaGang/akkoma
54 lines
1.4 KiB
Elixir
54 lines
1.4 KiB
Elixir
# Pleroma: A lightweight social networking server
|
|
# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
|
|
# SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
defmodule Pleroma.Web.ActivityPub.MRF.AntiLinkSpamPolicy do
|
|
alias Pleroma.User
|
|
|
|
@behaviour Pleroma.Web.ActivityPub.MRF
|
|
|
|
require Logger
|
|
|
|
# has the user successfully posted before?
|
|
defp old_user?(%User{} = u) do
|
|
u.info.note_count > 0 || u.info.follower_count > 0
|
|
end
|
|
|
|
# does the post contain links?
|
|
defp contains_links?(%{"content" => content} = _object) do
|
|
content
|
|
|> Floki.filter_out("a.mention,a.hashtag,a[rel~=\"tag\"],a.zrl")
|
|
|> Floki.attribute("a", "href")
|
|
|> length() > 0
|
|
end
|
|
|
|
defp contains_links?(_), do: false
|
|
|
|
@impl true
|
|
def filter(%{"type" => "Create", "actor" => actor, "object" => object} = message) do
|
|
with {:ok, %User{} = u} <- User.get_or_fetch_by_ap_id(actor),
|
|
{:contains_links, true} <- {:contains_links, contains_links?(object)},
|
|
{:old_user, true} <- {:old_user, old_user?(u)} do
|
|
{:ok, message}
|
|
else
|
|
{:contains_links, false} ->
|
|
{:ok, message}
|
|
|
|
{:old_user, false} ->
|
|
{:reject, nil}
|
|
|
|
{:error, _} ->
|
|
{:reject, nil}
|
|
|
|
e ->
|
|
Logger.warn("[MRF anti-link-spam] WTF: unhandled error #{inspect(e)}")
|
|
{:reject, nil}
|
|
end
|
|
end
|
|
|
|
# in all other cases, pass through
|
|
def filter(message), do: {:ok, message}
|
|
|
|
@impl true
|
|
def describe(), do: {:ok, %{}}
|
|
end
|