/**

 * params:{

 * 'y, 年

 * M, 月

 * d, 日

 * h, 时

 * m, 分

 * s' 秒

 * }

 * 使用方法：dateformat('h:m:s') => 09:08:11

 * dateformat('y-M-d h:m:s') => 2018-06-08 09:08:11

 */

export function dateformat(params) {

  var date = new Date(),

  year = date.getFullYear(),

  month = date.getMonth() + 1,

  day = date.getDate(),

  hour = date.getHours(),

  minute = date.getMinutes(),

  second = date.getSeconds()

  var arr = params.split('')

  var result = ''

  for(var i = 0; i < arr.length; i += 2){

    var tem = arr[i+1] === undefined ? '' : arr[i+1]

    switch(arr[i]){

      case 'y': result += addZero(year) + tem

      break

      case 'M': result += addZero(month) + tem

      break

      case 'd': result += addZero(day) + tem

      break

      case 'h': result += addZero(hour) + tem

      break

      case 'm': result += addZero(minute) + tem

      break

      case 's': result += addZero(second)

      break

    }

  }

  return result

}

// 如果时间是个位数，就补0

function addZero(obj){

  return obj < 10 ? '0' + obj : obj

}