export function timeSinceBlock(date, interval) {
  var second=1000, minute=second*60, hour=minute*60, day=hour*24, week=day*7;
  let date1 = new Date(date*1000);
  let date2 = new Date();
  var timediff = date2 - date1;
  if (isNaN(timediff)) return NaN;
  switch (interval) {
  case "years": return date2.getFullYear() - date1.getFullYear();
  case "months": return (
    ( date2.getFullYear() * 12 + date2.getMonth() )
      -
      ( date1.getFullYear() * 12 + date1.getMonth() )
  );
  case "weeks"  : return Math.floor(timediff / week)
  case "days"   : return Math.floor(timediff / day)
  case "hours"  : return Math.floor(timediff / hour)
  case "minutes": return Math.floor(timediff / minute)
  case "seconds": return Math.floor(timediff / second)
  default: return undefined
  }
}