将时间转为几小时前，几周前，几天前等

getDateDiff (stamptime) {

  let time = Date.parse(new Date(stamptime)) / 1000
  let current_time = Date.parse(new Date()) / 1000;
  let diff = current_time - time;
  let agoAt = '刚刚';
  let timePoints = [
    { value: 60 * 60 * 24 * 365, suffix: '年前', max: 2 },
    { value: 60 * 60 * 24 * 30,  suffix: '月前', max: 11 },
    { value: 60 * 60 * 24 * 7,   suffix: '周前', max: 4 },
    { value: 60 * 60 * 24,       suffix: '天前', max: 6 },
    { value: 60 * 60,            suffix: '小时前', max: 23 },
    { value: 60 * 10,            suffix: '0分钟前', max: 5 }
  ];

  for (let i = 0; i < timePoints.length; i++) {
    let point = timePoints[i];
    let mode = Math.floor(diff / point.value);
    console.log('mode', mode, timePoints[i])
    if (mode >= 1) {
      agoAt = Math.min(mode, point.max) + point.suffix;
      break;
    }
  }
  return agoAt;
}