Make outbound transmogrifier aware of edit history

lib/pleroma/constants.ex

@@ -42,6 +42,18 @@ defmodule Pleroma.Constants do
     ]
   )
 
+  const(updatable_object_types,
+    do: [
+      "Note",
+      "Question",
+      "Audio",
+      "Video",
+      "Event",
+      "Article",
+      "Page"
+    ]
+  )
+
   const(actor_types,
     do: [
       "Application",

lib/pleroma/web/activity_pub/side_effects.ex

@@ -411,7 +411,6 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
     {:ok, object, meta}
   end
 
-  @updatable_object_types ["Note", "Question"]
   defp handle_update_object(
          %{data: %{"type" => "Update", "object" => updated_object}} = object,
          meta
@@ -429,7 +428,7 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
         meta[:object_data]
       end
 
-    if orig_object_data["type"] in @updatable_object_types do
+    if orig_object_data["type"] in Pleroma.Constants.updatable_object_types() do
       %{
         updated_data: updated_object_data,
         updated: updated,

lib/pleroma/web/activity_pub/transmogrifier.ex

@@ -687,6 +687,24 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> strip_internal_fields
     |> strip_internal_tags
     |> set_type
+    |> maybe_process_history
+  end
+
+  defp maybe_process_history(%{"formerRepresentations" => %{"orderedItems" => history}} = object) do
+    processed_history =
+      Enum.map(
+        history,
+        fn
+          item when is_map(item) -> prepare_object(item)
+          item -> item
+        end
+      )
+
+    put_in(object, ["formerRepresentations", "orderedItems"], processed_history)
+  end
+
+  defp maybe_process_history(object) do
+    object
   end
 
   #  @doc
@@ -711,6 +729,21 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     {:ok, data}
   end
 
+  def prepare_outgoing(%{"type" => "Update", "object" => %{"type" => objtype} = object} = data)
+      when objtype in Pleroma.Constants.updatable_object_types() do
+    object =
+      object
+      |> prepare_object
+
+    data =
+      data
+      |> Map.put("object", object)
+      |> Map.merge(Utils.make_json_ld_header())
+      |> Map.delete("bcc")
+
+    {:ok, data}
+  end
+
   def prepare_outgoing(%{"type" => "Announce", "actor" => ap_id, "object" => object_id} = data) do
     object =
       object_id
@@ -902,24 +935,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   end
 
   def strip_internal_fields(object) do
-    outer = Map.drop(object, Pleroma.Constants.object_internal_fields())
-
-    case outer do
-      %{"formerRepresentations" => %{"orderedItems" => list}} when is_list(list) ->
-        update_in(
-          outer["formerRepresentations"]["orderedItems"],
-          &Enum.map(
-            &1,
-            fn
-              item when is_map(item) -> Map.drop(item, Pleroma.Constants.object_internal_fields())
-              item -> item
-            end
-          )
-        )
-
-      _ ->
-        outer
-    end
+    Map.drop(object, Pleroma.Constants.object_internal_fields())
   end
 
   defp strip_internal_tags(%{"tag" => tags} = object) do