Use delivery info when federating deletes

lib/pleroma/delivery.ex

@@ -46,6 +46,10 @@ defmodule Pleroma.Delivery do
     end
   end
 
+  # A hack because user delete activities have a fake id for whatever reason
+  # TODO: Get rid of this
+  def delete_all_by_object_id("pleroma:fake_object_id"), do: {0, []}
+
   def delete_all_by_object_id(object_id) do
     from(d in Delivery, where: d.object_id == ^object_id)
     |> Repo.delete_all()

lib/pleroma/user.ex

@@ -1627,6 +1627,10 @@ defmodule Pleroma.User do
   def is_internal_user?(%User{local: true, nickname: "internal." <> _}), do: true
   def is_internal_user?(_), do: false
 
+  # A hack because user delete activities have a fake id for whatever reason
+  # TODO: Get rid of this
+  def get_delivered_users_by_object_id("pleroma:fake_object_id"), do: []
+
   def get_delivered_users_by_object_id(object_id) do
     from(u in User,
       inner_join: delivery in assoc(u, :deliveries),

lib/pleroma/web/activity_pub/publisher.ex

@@ -5,9 +5,11 @@
 defmodule Pleroma.Web.ActivityPub.Publisher do
   alias Pleroma.Activity
   alias Pleroma.Config
+  alias Pleroma.Delivery
   alias Pleroma.HTTP
   alias Pleroma.Instances
   alias Pleroma.User
+  alias Pleroma.Object
   alias Pleroma.Web.ActivityPub.Relay
   alias Pleroma.Web.ActivityPub.Transmogrifier
 
@@ -107,7 +109,18 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
         {:ok, []}
       end
 
-    Pleroma.Web.Salmon.remote_users(actor, activity) ++ followers
+    fetchers =
+      with %Activity{data: %{"type" => "Delete"}} <- activity,
+           %Object{id: object_id} <- Object.normalize(activity),
+           fetchers <- User.get_delivered_users_by_object_id(object_id),
+           _ <- Delivery.delete_all_by_object_id(object_id) do
+        fetchers
+      else
+        _ ->
+          []
+      end
+
+    Pleroma.Web.Salmon.remote_users(actor, activity) ++ followers ++ fetchers
   end
 
   defp get_cc_ap_ids(ap_id, recipients) do