zklib/zklib/timestamp_parser.js

Attendance Machine Library for NodeJS with a connection to the network using the UDP protocol and port 4370

/**
 *
 * @param {number} time
 */
exports.decode = time => {
  const second = time % 60;
  time = (time - second) / 60;

  const minute = time % 60;
  time = (time - minute) / 60;

  const hour = time % 24;
  time = (time - hour) / 24;

  const day = time % 31 + 1;
  time = (time - (day - 1)) / 31;

  const month = time % 12;
  time = (time - month) / 12;

  const year = time + 2000;

  return new Date(year, month, day, hour, minute, second);
};

/**
 *
 * @param {Date} date
 */
exports.encode = date => {
  return (
    ((date.getFullYear() % 100) * 12 * 31 + date.getMonth() * 31 + date.getDate() - 1) * (24 * 60 * 60) +
    (date.getHours() * 60 + date.getMinutes()) * 60 +
    date.getSeconds()
  );
};