# Pleroma: A lightweight social networking server
-# Copyright © 2017-2019 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.KeywordPolicy do
+ require Pleroma.Constants
+
+ @moduledoc "Reject or Word-Replace messages with a keyword or regex"
+
@behaviour Pleroma.Web.ActivityPub.MRF
+ defp string_matches?(string, _) when not is_binary(string) do
+ false
+ end
+
defp string_matches?(string, pattern) when is_binary(pattern) do
String.contains?(string, pattern)
end
defp check_ftl_removal(
%{"to" => to, "object" => %{"content" => content, "summary" => summary}} = message
) do
- if "https://www.w3.org/ns/activitystreams#Public" in to and
+ if Pleroma.Constants.as_public() in to and
Enum.any?(Pleroma.Config.get([:mrf_keyword, :federated_timeline_removal]), fn pattern ->
string_matches?(content, pattern) or string_matches?(summary, pattern)
end) do
- to = List.delete(to, "https://www.w3.org/ns/activitystreams#Public")
- cc = ["https://www.w3.org/ns/activitystreams#Public" | message["cc"] || []]
+ to = List.delete(to, Pleroma.Constants.as_public())
+ cc = [Pleroma.Constants.as_public() | message["cc"] || []]
message =
message
end
defp check_replace(%{"object" => %{"content" => content, "summary" => summary}} = message) do
+ content =
+ if is_binary(content) do
+ content
+ else
+ ""
+ end
+
+ summary =
+ if is_binary(summary) do
+ summary
+ else
+ ""
+ end
+
{content, summary} =
- Enum.reduce(Pleroma.Config.get([:mrf_keyword, :replace]), {content, summary}, fn {pattern,
- replacement},
- {content_acc,
- summary_acc} ->
- {String.replace(content_acc, pattern, replacement),
- String.replace(summary_acc, pattern, replacement)}
- end)
+ Enum.reduce(
+ Pleroma.Config.get([:mrf_keyword, :replace]),
+ {content, summary},
+ fn {pattern, replacement}, {content_acc, summary_acc} ->
+ {String.replace(content_acc, pattern, replacement),
+ String.replace(summary_acc, pattern, replacement)}
+ end
+ )
{:ok,
message
|> put_in(["object", "summary"], summary)}
end
- @impl true
- def filter(%{"object" => %{"content" => nil}} = message) do
- {:ok, message}
- end
-
@impl true
def filter(%{"type" => "Create", "object" => %{"content" => _content}} = message) do
with {:ok, message} <- check_reject(message),
@impl true
def filter(message), do: {:ok, message}
+
+ @impl true
+ def describe do
+ # This horror is needed to convert regex sigils to strings
+ mrf_keyword =
+ Pleroma.Config.get(:mrf_keyword, [])
+ |> Enum.map(fn {key, value} ->
+ {key,
+ Enum.map(value, fn
+ {pattern, replacement} ->
+ %{
+ "pattern" =>
+ if not is_binary(pattern) do
+ inspect(pattern)
+ else
+ pattern
+ end,
+ "replacement" => replacement
+ }
+
+ pattern ->
+ if not is_binary(pattern) do
+ inspect(pattern)
+ else
+ pattern
+ end
+ end)}
+ end)
+ |> Enum.into(%{})
+
+ {:ok, %{mrf_keyword: mrf_keyword}}
+ end
end