Javascript 用于时间跟踪的正则表达式验证

const INPUT = "12h 21d  30s";

checkTimespanFormat(INPUT);

if (checkTimespanKeysOrder(INPUT, true))
  console.log(`${INPUT} keys order is valid`);
else console.log(`${INPUT} keys order is NOT valid`);
//******************************************************************

/**
 * Ensures that time keys are:
 * - Preceeded by one or two digits
 * - Separated by one or many spaces
 */
function checkTimespanFormat(timespanStr, maltiSpacesSeparation = false) {
  // timespan items must be separated by 1 space
  if (maltiSpacesSeparation) timespanStr = timespanStr.toLowerCase().split(" ");
  // timespan items must be separated by one or many space
  else timespanStr = timespanStr.toLowerCase().split(/ +/);

  // timespan items must be formatted correctly
  timespanStr.forEach((item) => {
    if (!/^\d{1,2}[dhms]$/.test(item)) console.log("invalid", item);
    else console.log("valid", item);
  });
}

/**
 * Validates:
 * - Keys order
 * - Duplicate keys
 */
function checkTimespanKeysOrder(timespanStr) {
  const ORDER = ["d", "h", "m", "s"];

  let timeKeysOrder = timespanStr
    .replace(/[^dhms]/g, "") // Removing non time keys characters
    .split("") // toArray
    .map((char) => {
      return ORDER.indexOf(char); // Getting the order of time keys
    });

  for (i = 0; i < timeKeysOrder.length - 1; i++)
    if (timeKeysOrder.at(i) >= timeKeysOrder.at(i + 1)) return false;
  return true;
}