Support `list` visibility in StatusView

lib/pleroma/web/common_api/common_api.ex

@@ -243,18 +243,15 @@ def post(user, %{"status" => status} = data) do
       preview? = Pleroma.Web.ControllerHelper.truthy_param?(data["preview"]) || false
       direct? = visibility == "direct"
 
-      additional_data =
+      %{
-        %{"cc" => cc, "directMessage" => direct?} |> maybe_add_list_data(user, visibility)
-
-      params = %{
         to: to,
         actor: user,
         context: context,
         object: object,
-        additional: additional_data
+        additional: %{"cc" => cc, "directMessage" => direct?}
       }
-
+      |> maybe_add_list_data(user, visibility)
-      ActivityPub.create(params, preview?)
+      |> ActivityPub.create(preview?)
     else
       {:private_to_public, true} ->
         {:error, dgettext("errors", "The message visibility must be direct")}

lib/pleroma/web/common_api/utils.ex

@@ -108,19 +108,20 @@ def get_addressed_users(_, to) when is_list(to) do
 
   def get_addressed_users(mentioned_users, _), do: mentioned_users
 
-  def maybe_add_list_data(additional_data, user, {:list, list_id}) do
+  def maybe_add_list_data(activity_params, user, {:list, list_id}) do
     case Pleroma.List.get(list_id, user) do
       %Pleroma.List{} = list ->
-        additional_data
+        activity_params
-        |> Map.put("listMessage", list.ap_id)
+        |> put_in([:additional, "bcc"], [list.ap_id])
-        |> Map.put("bcc", [list.ap_id])
+        |> put_in([:additional, "listMessage"], list.ap_id)
+        |> put_in([:object, "listMessage"], list.ap_id)
 
       _ ->
-        additional_data
+        activity_params
     end
   end
 
-  def maybe_add_list_data(additional_data, _, _), do: additional_data
+  def maybe_add_list_data(activity_params, _, _), do: activity_params
 
   def make_poll_data(%{"poll" => %{"options" => options, "expires_in" => expires_in}} = data)
       when is_list(options) do

test/web/mastodon_api/status_view_test.exs

@@ -541,4 +541,17 @@ test "embeds a relationship in the account in reposts" do
     assert result[:reblog][:account][:pleroma][:relationship] ==
              AccountView.render("relationship.json", %{user: user, target: user})
   end
+
+  test "visibility/list" do
+    user = insert(:user)
+
+    {:ok, list} = Pleroma.List.create("foo", user)
+
+    {:ok, activity} =
+      CommonAPI.post(user, %{"status" => "foobar", "visibility" => "list:#{list.id}"})
+
+    status = StatusView.render("status.json", activity: activity)
+
+    assert status.visibility == "list"
+  end
 end