# 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
String.match?(string, pattern)
end
- defp check_reject(%{"object" => %{"content" => content}} = message) do
+ defp check_reject(%{"object" => %{"content" => content, "summary" => summary}} = message) do
if Enum.any?(Pleroma.Config.get([:mrf_keyword, :reject]), fn pattern ->
- string_matches?(content, pattern)
+ string_matches?(content, pattern) or string_matches?(summary, pattern)
end) do
{:reject, nil}
else
end
end
- defp check_ftl_removal(%{"to" => to, "object" => %{"content" => content}} = message) do
- if "https://www.w3.org/ns/activitystreams#Public" in to and
- Enum.any?(Pleroma.Config.get([:mrf_keyword, :ftl_removal]), fn pattern ->
- string_matches?(content, pattern)
+ defp check_ftl_removal(
+ %{"to" => to, "object" => %{"content" => content, "summary" => summary}} = message
+ ) do
+ 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
|> Map.put("to", to)
|> Map.put("cc", cc)
- IO.inspect(message)
{:ok, message}
else
{:ok, message}
end
end
- defp check_replace(%{"object" => %{"content" => content}} = message) do
+ defp check_replace(%{"object" => %{"content" => content, "summary" => summary}} = message) do
content =
- Enum.reduce(Pleroma.Config.get([:mrf_keyword, :replace]), content, fn {pattern, replacement},
- acc ->
- String.replace(acc, pattern, replacement)
- end)
+ if is_binary(content) do
+ content
+ else
+ ""
+ end
- {:ok, put_in(message["object"]["content"], content)}
- end
+ summary =
+ if is_binary(summary) do
+ summary
+ else
+ ""
+ end
- @impl true
- def filter(%{"object" => %{"content" => nil}} = message) do
- {:ok, message}
+ {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
+ )
+
+ {:ok,
+ message
+ |> put_in(["object", "content"], content)
+ |> put_in(["object", "summary"], summary)}
end
@impl true
@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