function formatDateTime(date) {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
}

function formatNumber(n) {
  n = n.toString()
  return n[1] ? n : `0${n}`
}

function maskToken(token) {
  if (!token) {
    return '未登录'
  }

  if (token.length <= 10) {
    return token
  }

  return `${token.slice(0, 4)}...${token.slice(-4)}`
}

module.exports = {
  formatDateTime,
  maskToken
}