client/src/utils/timeControl.js

   1 function timeUnitToSeconds(value, unit) {
   2   let seconds = value;
   3   switch (unit) {
   4     case "d":
   5       seconds *= 86400; //24*60*60
   6       break;
   7     case "h":
   8       seconds *= 3600;
   9       break;
  10     case "m":
  11       seconds *= 60;
  12       break;
  13   }
  14   return seconds;
  15 }
  16
  17 // Used only if increment, hence live game: no "day" unit
  18 function isLargerUnit(unit1, unit2) {
  19   return (
  20     (unit1 == "h" && ["s", "m"].includes(unit2)) ||
  21     (unit1 == "m" && unit2 == "s")
  22   );
  23 }
  24
  25 export function extractTime(cadence) {
  26   let tcParts = cadence.replace(/ /g, "").split("+");
  27   // Concatenate usual time control suffix, in case of none is provided
  28   tcParts[0] += "m";
  29   const mainTimeArray = tcParts[0].match(/^([0-9]+)([smhd]+)$/);
  30   if (!mainTimeArray) return null;
  31   const mainTimeValue = parseInt(mainTimeArray[1]);
  32   const mainTimeUnit = mainTimeArray[2][0];
  33   const mainTime = timeUnitToSeconds(mainTimeValue, mainTimeUnit);
  34   let increment = 0;
  35   if (tcParts.length >= 2) {
  36     // Correspondance games don't use an increment:
  37     if (mainTimeUnit == 'd') return null;
  38     tcParts[1] += "s";
  39     const incrementArray = tcParts[1].match(/^([0-9]+)([smhd]+)$/);
  40     if (!incrementArray) return null;
  41     const incrementValue = parseInt(incrementArray[1]);
  42     const incrementUnit = incrementArray[2][0];
  43     // Increment unit cannot be larger than main unit:
  44     if (isLargerUnit(incrementUnit, mainTimeUnit)) return null;
  45     increment = timeUnitToSeconds(incrementValue, incrementUnit);
  46   }
  47   return { mainTime: mainTime, increment: increment };
  48 }