Transmogrifier: Actually store who deleted a note.

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -412,19 +412,21 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   def delete(%Object{data: %{"id" => id, "actor" => actor}} = object, options \\ []) do
     local = Keyword.get(options, :local, true)
     activity_id = Keyword.get(options, :activity_id, nil)
+    actor = Keyword.get(options, :actor, actor)
 
     user = User.get_cached_by_ap_id(actor)
     to = (object.data["to"] || []) ++ (object.data["cc"] || [])
 
     with {:ok, object, activity} <- Object.delete(object),
-         data <- %{
-           "type" => "Delete",
-           "actor" => actor,
-           "object" => id,
-           "to" => to,
-           "deleted_activity_id" => activity && activity.id
-         }
-         |> maybe_put("id", activity_id),
+         data <-
+           %{
+             "type" => "Delete",
+             "actor" => actor,
+             "object" => id,
+             "to" => to,
+             "deleted_activity_id" => activity && activity.id
+           }
+           |> maybe_put("id", activity_id),
          {:ok, activity} <- insert(data, local, false),
          stream_out_participations(object, user),
          _ <- decrease_replies_count_if_reply(object),

lib/pleroma/web/activity_pub/transmogrifier.ex

@@ -646,7 +646,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
          {:ok, %User{} = actor} <- User.get_or_fetch_by_ap_id(actor),
          {:ok, object} <- get_obj_helper(object_id),
          :ok <- Containment.contain_origin(actor.ap_id, object.data),
-         {:ok, activity} <- ActivityPub.delete(object, local: false, activity_id: id) do
+         {:ok, activity} <-
+           ActivityPub.delete(object, local: false, activity_id: id, actor: actor.ap_id) do
       {:ok, activity}
     else
       nil ->