Allow group actors to boost posts

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -319,6 +319,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
          {:ok, _actor} <- update_last_status_at_if_public(actor, activity),
          _ <- notify_and_stream(activity),
          :ok <- maybe_schedule_poll_notifications(activity),
+         :ok <- maybe_handle_group_posts(activity),
          :ok <- maybe_federate(activity) do
       {:ok, activity}
     else

lib/pleroma/web/activity_pub/side_effects.ex

@@ -233,6 +233,8 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
 
       Pleroma.Search.add_to_index(Map.put(activity, :object, object))
 
+      Utils.maybe_handle_group_posts(activity)
+
       meta =
         meta
         |> add_notifications(notifications)

lib/pleroma/web/activity_pub/utils.ex

@@ -935,4 +935,21 @@ defmodule Pleroma.Web.ActivityPub.Utils do
     |> where([a, object: o], fragment("(?)->>'type' = 'Answer'", o.data))
     |> Repo.all()
   end
+
+  def maybe_handle_group_posts(activity) do
+    mentions =
+      activity.data["to"]
+      |> Enum.filter(&(&1 != activity.actor))
+
+    mentioned_local_groups =
+      User.get_all_by_ap_id(mentions)
+      |> Enum.filter(&(&1.actor_type == "Group" and &1.local))
+
+    mentioned_local_groups
+    |> Enum.each(fn group ->
+      Pleroma.Web.CommonAPI.repeat(activity.id, group)
+    end)
+
+    :ok
+  end
 end