Mastodon API: Return `pleroma.direct_conversation_id` when creating direct messages (`POST /api/v1/statuses`)

CHANGELOG.md

@@ -11,6 +11,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Replaced [pleroma_job_queue](https://git.pleroma.social/pleroma/pleroma_job_queue) and `Pleroma.Web.Federator.RetryQueue` with [Oban](https://github.com/sorentwo/oban) (see [`docs/config.md`](docs/config.md) on migrating customized worker / retry settings)
 - Introduced [quantum](https://github.com/quantum-elixir/quantum-core) job scheduler
 - Admin API: Return `total` when querying for reports
+- Mastodon API: Return `pleroma.direct_conversation_id` when creating a direct message (`POST /api/v1/statuses`)
 
 ## [1.1.0] - 2019-??-??
 ### Security

lib/pleroma/web/mastodon_api/controllers/mastodon_api_controller.ex

@@ -611,7 +611,12 @@ def post_status(%{assigns: %{user: user}} = conn, %{"status" => _} = params) do
         {:ok, activity} ->
           conn
           |> put_view(StatusView)
-          |> try_render("status.json", %{activity: activity, for: user, as: :activity})
+          |> try_render("status.json", %{
+            activity: activity,
+            for: user,
+            as: :activity,
+            with_direct_conversation_id: true
+          })
       end
     end
   end

test/web/mastodon_api/mastodon_api_controller_test.exs

@@ -296,7 +296,9 @@ test "posting a direct status", %{conn: conn} do
         conn
         |> post("api/v1/statuses", %{"status" => content, "visibility" => "direct"})
 
-      assert %{"id" => id, "visibility" => "direct"} = json_response(conn, 200)
+      assert %{"id" => id} = response = json_response(conn, 200)
+      assert response["visibility"] == "direct"
+      assert response["pleroma"]["direct_conversation_id"]
       assert activity = Activity.get_by_id(id)
       assert activity.recipients == [user2.ap_id, conn.assigns[:user].ap_id]
       assert activity.data["to"] == [user2.ap_id]