//常用时间 /start 距离当前时间几天前，later往前延续几天
let getDateLater = function(start=0,later=0) {
  return new Promise(function (resolve, reject) {
    let dateArr = [];
    let date = new Date();
    date.setDate(date.getDate() - start);
    let todate = date.getFullYear() + "-" + ((date.getMonth() + 1) < 10 ? ("0" + (date.getMonth() + 1)) : date.getMonth()+1) + "-" + (date.getDate() < 10 ? ("0" + date.getDate()) : date.getDate());
    date.setDate(date.getDate() - later);
    let laterdate = date.getFullYear() + "-"  + ((date.getMonth() + 1) < 10 ? ("0" + (date.getMonth() + 1)) : date.getMonth()+1) + "-" + (date.getDate() < 10 ? ("0" + date.getDate()) : date.getDate());
    let laterMonth = date.getFullYear() + "-"  + ((date.getMonth() + 1) < 10 ? ("0" + (date.getMonth() + 1)) : date.getMonth()+1);
    dateArr.push(laterdate)
    dateArr.push(todate)
    dateArr.push(laterMonth)
    resolve(dateArr);
  })
}

module.exports = {
  getDateLater,
}