client/src/utils/datetime.js

   1 function zeroPad(x) {
   2   return (x < 10 ? "0" : "") + x;
   3 }
   4
   5 export function getDate(d) {
   6   return (
   7     d.getFullYear() +
   8     "-" +
   9     zeroPad(d.getMonth() + 1) +
  10     "-" +
  11     zeroPad(d.getDate())
  12   );
  13 }
  14
  15 export function getTime(d) {
  16   return (
  17     zeroPad(d.getHours()) +
  18     ":" +
  19     zeroPad(d.getMinutes()) +
  20     ":" +
  21     zeroPad(d.getSeconds())
  22   );
  23 }
  24
  25 function padDigits(x) {
  26   if (x < 10) return "0" + x;
  27   return x;
  28 }
  29
  30 export function ppt(t) {
  31   // "Pretty print" an amount of time given in seconds
  32   const dayInSeconds = 60 * 60 * 24;
  33   const hourInSeconds = 60 * 60;
  34   const days = Math.floor(t / dayInSeconds);
  35   const hours = Math.floor((t % dayInSeconds) / hourInSeconds);
  36   const minutes = Math.floor((t % hourInSeconds) / 60);
  37   const seconds = Math.floor(t % 60);
  38   let res = "";
  39   if (days > 0) res += days + "d ";
  40   if (days <= 3 && hours > 0)
  41     //NOTE: 3 is arbitrary
  42     res += hours + "h ";
  43   if (days == 0 && minutes > 0)
  44     res += hours > 0 ? padDigits(minutes) + "m " : minutes + ":";
  45   if (days == 0 && hours == 0) {
  46     res += padDigits(seconds);
  47     if (minutes == 0) res += "s"; //seconds indicator, since this is the only number printed
  48   }
  49   return res.trim(); //remove potential last space
  50 }