/**
 * Get the time between start and now in milliseconds
 */
function calculateElapsedTime(start) {
  const diff = process.hrtime(start);

  return Math.round((diff[0] * 1e9 + diff[1]) / 1e6); // msec
}

/**
 * Get the ISO string with yesterday's date set (- 24 hours)
 */
function getYesterdayISOString() {
  const date = new Date();

  date.setDate(date.getDate() - 1);

  return date.toISOString();
}

module.exports = { calculateElapsedTime, getYesterdayISOString };