bcbp-parser/lib/julian.js

BCBP boarding pass code parser

const julian = {
  dayInMs   : 1000 * 60 * 60 * 24,
  julian1970: 2440588,
  julian2000: 2451545,
};

const getJulianDate = (jd) => {
  const { dayInMs, julian1970 } = julian;
  return (jd)
    ? new Date((jd + 0.5 - julian1970) * dayInMs)
    : new Date().valueOf() / dayInMs - 0.5 + julian1970;
};

const julianDays = (jdays) => {
  return (jdays)
    ? getJulianDate(jdays + julian2000)
    : getJulianDate() - julian2000;
};

module.exports = {
  getJulianDate,
  julianDays,
};