await request("/uploads/" + encodeURIComponent(course.upload.upload_id) + "/complete", "POST", {});

let current;
for (;;) {
  current = await request("/courses/" + course.course_id);
  if (current.status === "ready") break;
  if (current.status === "failed") throw new Error(current.error);
  await new Promise(resolve => setTimeout(resolve, 2000));
}
console.log(current.course_id, current.format);