function sendResponse({ res, status, message, data }) {
  const response = {
    code: status,
    status: status === 200 ? 'success' : 'error',
    massage: message,
    data: data,
  }
  res.status(status).send(response)
}

function arrayToTree(items) {
  const map = new Map()

  // 初始化 Map
  items.forEach((item) => {
    map.set(item.id, { ...item, children: null })
  })

  const result = []
  items.forEach((item) => {
    if (item.parent_id === null) {
      result.push(map.get(item.id))
    } else {
      const parent = map.get(item.parent_id)
      if (parent) {
        parent.children = parent.children
          ? [...parent.children, map.get(item.id)]
          : [map.get(item.id)]
        // parent.children.push(map.get(item.id))
      }
    }
  })

  return result
}

module.exports = {
  sendResponse,
  arrayToTree,
}