2 files changed, 34 insertions, 13 deletions

diff --git a/lib/pleroma/web/common_api/common_api.ex b/lib/pleroma/web/common_api/common_api.ex
index 949baa3b0..44669b228 100644
--- a/lib/pleroma/web/common_api/common_api.ex
+++ b/lib/pleroma/web/common_api/common_api.ex
@@ -176,6 +176,11 @@ defmodule Pleroma.Web.CommonAPI do
       when visibility in ~w{public unlisted private direct},
       do: {visibility, get_replied_to_visibility(in_reply_to)}
 
+  def get_visibility(%{"visibility" => "list:" <> list_id}, in_reply_to) do
+    visibility = {:list, String.to_integer(list_id)}
+    {visibility, get_replied_to_visibility(in_reply_to)}
+  end
+
   def get_visibility(_, in_reply_to) when not is_nil(in_reply_to) do
     visibility = get_replied_to_visibility(in_reply_to)
     {visibility, visibility}
@@ -236,19 +241,18 @@ defmodule Pleroma.Web.CommonAPI do
              "emoji",
              Map.merge(Formatter.get_emoji_map(full_payload), poll_emoji)
            ) do
-      res =
-        ActivityPub.create(
-          %{
-            to: to,
-            actor: user,
-            context: context,
-            object: object,
-            additional: %{"cc" => cc, "directMessage" => visibility == "direct"}
-          },
-          Pleroma.Web.ControllerHelper.truthy_param?(data["preview"]) || false
-        )
-
-      res
+      preview? = Pleroma.Web.ControllerHelper.truthy_param?(data["preview"]) || false
+      direct? = visibility == "direct"
+
+      %{
+        to: to,
+        actor: user,
+        context: context,
+        object: object,
+        additional: %{"cc" => cc, "directMessage" => direct?}
+      }
+      |> maybe_add_list_data(user, visibility)
+      |> ActivityPub.create(preview?)
     else
       {:private_to_public, true} ->
         {:error, dgettext("errors", "The message visibility must be direct")}
diff --git a/lib/pleroma/web/common_api/utils.ex b/lib/pleroma/web/common_api/utils.ex
index 8e482eef7..fed5f9de7 100644
--- a/lib/pleroma/web/common_api/utils.ex
+++ b/lib/pleroma/web/common_api/utils.ex
@@ -100,12 +100,29 @@ defmodule Pleroma.Web.CommonAPI.Utils do
     end
   end
 
+  def get_to_and_cc(_user, _mentions, _inReplyTo, _), do: {[], []}
+
   def get_addressed_users(_, to) when is_list(to) do
     User.get_ap_ids_by_nicknames(to)
   end
 
   def get_addressed_users(mentioned_users, _), do: mentioned_users
 
+  def maybe_add_list_data(activity_params, user, {:list, list_id}) do
+    case Pleroma.List.get(list_id, user) do
+      %Pleroma.List{} = list ->
+        activity_params
+        |> put_in([:additional, "bcc"], [list.ap_id])
+        |> put_in([:additional, "listMessage"], list.ap_id)
+        |> put_in([:object, "listMessage"], list.ap_id)
+
+      _ ->
+        activity_params
+    end
+  end
+
+  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
     %{max_expiration: max_expiration, min_expiration: min_expiration} =