Started code review + some fixes (unfinished)

[vchess.git] / client / src / utils / datetime.js

diff --git a/client/src/utils/datetime.js b/client/src/utils/datetime.js
index 3075bff..75e85d7 100644 (file)
--- a/client/src/utils/datetime.js
+++ b/client/src/utils/datetime.js
@@ -1,15 +1,50 @@
-function zeroPad(x)
-{
-       return (x<10 ? "0" : "") + x;
+function zeroPad(x) {
+  return (x < 10 ? "0" : "") + x;
 }
 
-export function getDate(d)
-{
-       return d.getFullYear() + '-' + zeroPad(d.getMonth()+1) + '-' + zeroPad(d.getDate());
+export function getDate(d) {
+  return (
+    d.getFullYear() +
+    "-" +
+    zeroPad(d.getMonth() + 1) +
+    "-" +
+    zeroPad(d.getDate())
+  );
 }
 
-export function getTime(d)
-{
-       return zeroPad(d.getHours()) + ":" + zeroPad(d.getMinutes()) + ":" +
-               zeroPad(d.getSeconds());
+export function getTime(d) {
+  return (
+    zeroPad(d.getHours()) +
+    ":" +
+    zeroPad(d.getMinutes()) +
+    ":" +
+    zeroPad(d.getSeconds())
+  );
+}
+
+function padDigits(x) {
+  if (x < 10) return "0" + x;
+  return x;
+}
+
+export function ppt(t) {
+  // "Pretty print" an amount of time given in seconds
+  const dayInSeconds = 60 * 60 * 24;
+  const hourInSeconds = 60 * 60;
+  const days = Math.floor(t / dayInSeconds);
+  const hours = Math.floor((t % dayInSeconds) / hourInSeconds);
+  const minutes = Math.floor((t % hourInSeconds) / 60);
+  const seconds = Math.floor(t % 60);
+  let res = "";
+  if (days > 0) res += days + "d ";
+  if (days <= 3 && hours > 0)
+    //NOTE: 3 is arbitrary
+    res += hours + "h ";
+  if (days == 0 && minutes > 0)
+    res += hours > 0 ? padDigits(minutes) + "m " : minutes + ":";
+  if (days == 0 && hours == 0) {
+    res += padDigits(seconds);
+    if (minutes == 0) res += "s"; //seconds indicator, since this is the only number printed
+  }
+  return res.trim(); //remove potential last space
 }