label-studio/src/utils/date.js

Data Labeling Tool that is backend agnostic and can be embedded into your applications

function checkISO(value) {
  let regExpISO = /\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+([+-][0-2]\d:[0-5]\d|Z)/;

  return regExpISO.test(value);
}

/**
 * Helper function to convert ms -> HHMMSS
 * @param {number} ms
 * @returns {string}
 */
export function msToHMS(ms) {
  // 1- Convert to seconds:
  var seconds = ms / 1000;
  // 2- Extract hours:
  var hours = parseInt(seconds / 3600); // 3,600 seconds in 1 hour
  seconds = seconds % 3600; // seconds remaining after extracting hours
  // 3- Extract minutes:
  var minutes = parseInt(seconds / 60); // 60 seconds in 1 minute
  // 4- Keep only seconds not extracted to minutes:
  seconds = Math.floor(seconds); // % 60;

  return hours + ":" + minutes + ":" + seconds;
}

/**
 * Helper function to pretty date
 */
export function prettyDate(time) {
  if (typeof time !== "string" && !checkISO(time)) return;

  let date = new Date((time || "").replace(/-/g, "/").replace(/[TZ]/g, " ")),
    diff = (new Date().getTime() - date.getTime()) / 1000,
    day_diff = Math.floor(diff / 86400);

  if (isNaN(day_diff) || day_diff < 0) return;

  return (
    (day_diff === 0 &&
      ((diff < 60 && "just now") ||
        (diff < 120 && "1 minute ago") ||
        (diff < 3600 && Math.floor(diff / 60) + " minutes ago") ||
        (diff < 7200 && "1 hour ago") ||
        (diff < 86400 && Math.floor(diff / 3600) + " hours ago"))) ||
    (day_diff === 1 && "Yesterday") ||
    (day_diff < 7 && day_diff + " days ago") ||
    (day_diff < 31 && Math.ceil(day_diff / 7) + " weeks ago") ||
    day_diff + " days ago"
  );
}

/**
 * Helper function to get current timezone
 */
export function currentISODate() {
  let tzOffest = new Date().getTimezoneOffset() * 60000;
  let localISOTime = new Date(Date.now() - tzOffest).toISOString().slice(0, -1);

  return localISOTime;
}