loadAndTransformGist.ts

async function loadAndTransformGist(parent: IAST, item: IAST): Promise<IAST> {
  if (item.value === undefined) return item;

  const gist = item.value.substring(5).trim();
  const [data, jsonData] = await loadGist(gist);

  if (data.length === 1) {
    return getGistAST(jsonData.files[0], data[0]);
  }

  return {
    type: parent.type,
    children: data.map((file, index) =>
      getGistAST(jsonData.files[index], file)
    ),
  };
}