Merge branch 'fix/credo-issues-test' into 'develop'

[akkoma] / lib / pleroma / web / activity_pub / mrf / hellthread_policy.ex

diff --git a/lib/pleroma/web/activity_pub/mrf/hellthread_policy.ex b/lib/pleroma/web/activity_pub/mrf/hellthread_policy.ex
index a3f516ae7fde83b0680c7ec6f9f98ad8c9a72a3c..4c6e612b28357025f8b436c6ea3065e1bdce6bf7 100644 (file)
--- a/lib/pleroma/web/activity_pub/mrf/hellthread_policy.ex
+++ b/lib/pleroma/web/activity_pub/mrf/hellthread_policy.ex
@@ -3,20 +3,46 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.HellthreadPolicy do
+  alias Pleroma.User
   @behaviour Pleroma.Web.ActivityPub.MRF
 
+  defp delist_message(message) do
+    follower_collection = User.get_cached_by_ap_id(message["actor"]).follower_address
+
+    message
+    |> Map.put("to", [follower_collection])
+    |> Map.put("cc", ["https://www.w3.org/ns/activitystreams#Public"])
+  end
+
   @impl true
-  def filter(%{"type" => "Create"} = object) do
-    threshold = Pleroma.Config.get([:mrf_hellthread, :threshold])
-    recipients = (object["to"] || []) ++ (object["cc"] || [])
-
-    if length(recipients) > threshold do
-      {:reject, nil}
-    else
-      {:ok, object}
+  def filter(%{"type" => "Create"} = message) do
+    delist_threshold = Pleroma.Config.get([:mrf_hellthread, :delist_threshold])
+
+    reject_threshold =
+      Pleroma.Config.get(
+        [:mrf_hellthread, :reject_threshold],
+        Pleroma.Config.get([:mrf_hellthread, :threshold])
+      )
+
+    recipients = (message["to"] || []) ++ (message["cc"] || [])
+
+    cond do
+      length(recipients) > reject_threshold and reject_threshold > 0 ->
+        {:reject, nil}
+
+      length(recipients) > delist_threshold and delist_threshold > 0 ->
+        if Enum.member?(message["to"], "https://www.w3.org/ns/activitystreams#Public") or
+             Enum.member?(message["cc"], "https://www.w3.org/ns/activitystreams#Public") do
+          {:ok, delist_message(message)}
+        else
+          {:ok, message}
+        end
+
+      true ->
+        {:ok, message}
     end
   end
 
   @impl true
-  def filter(object), do: {:ok, object}
+  def filter(message), do: {:ok, message}
 end