const formatTime = 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(':')
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : '0' + n
}

const debounce = function(foo, t) {
  let timer
  return function() {
    if (timer !== undefined) {
      clearTimeout(timer)
    }
    timer = setTimeout(() => {
      foo.apply(this, arguments)              
    }, t)  
  }
}

module.exports = {
  formatTime: formatTime,
  debounce: debounce
}