utils: Fix maybe_splice_recipient when "object" isn’t a map

lib/pleroma/maps.ex

@@ -12,4 +12,10 @@ def put_if_present(map, key, value, value_function \\ &{:ok, &1}) when is_map(ma
       _ -> map
     end
   end
+
+  def safe_put_in(data, keys, value) when is_map(data) and is_list(keys) do
+    Kernel.put_in(data, keys, value)
+  rescue
+    _ -> data
+  end
 end

lib/pleroma/web/activity_pub/utils.ex

@@ -96,11 +96,11 @@ def maybe_splice_recipient(ap_id, params) do
         !label_in_collection?(ap_id, params["cc"])
 
     if need_splice? do
-      cc_list = extract_list(params["cc"])
+      cc = [ap_id | extract_list(params["cc"])]
 
       params
-      |> Map.put("cc", [ap_id | cc_list])
-      |> Kernel.put_in(["object", "cc"], [ap_id | cc_list])
+      |> Map.put("cc", cc)
+      |> Maps.safe_put_in(["object", "cc"], cc)
     else
       params
     end

test/pleroma/web/activity_pub/activity_pub_controller_test.exs

@@ -1003,7 +1003,6 @@ test "forwarded report from mastodon", %{conn: conn} do
         "actor" => remote_actor,
         "content" => "test report",
         "id" => "https://#{remote_domain}/e3b12fd1-948c-446e-b93b-a5e67edbe1d8",
-        "nickname" => reported_user.nickname,
         "object" => [
           reported_user.ap_id,
           note.data["object"]