Method relativeTimeToDate

src/Utils.js:274–398

* Computes the relative date based on a string. * @param {String} text The string to interpret the date from. * @param {Date} now The date the string is comparing against. * @returns {Object} The relative date object.

(text, now = new Date())

   * @returns {Object} The relative date object.
   **/
  static relativeTimeToDate(text, now = new Date()) {
    text = text.toLowerCase();
    let parts = text.split(' ');

    // Filter out whitespace
    parts = parts.filter(part => part !== '');

    const future = parts[0] === 'in';
    const past = parts[parts.length - 1] === 'ago';

    if (!future && !past && text !== 'now') {
      return {
        status: 'error',
        info: "Time should either start with 'in' or end with 'ago'",
      };
    }

    if (future && past) {
      return {
        status: 'error',
        info: "Time cannot have both 'in' and 'ago'",
      };
    }

    // strip the 'ago' or 'in'
    if (future) {
      parts = parts.slice(1);
    } else {
      // past
      parts = parts.slice(0, parts.length - 1);
    }

    if (parts.length % 2 !== 0 && text !== 'now') {
      return {
        status: 'error',
        info: 'Invalid time string. Dangling unit or number.',
      };
    }

    const pairs = [];
    while (parts.length) {
      pairs.push([parts.shift(), parts.shift()]);
    }

    let seconds = 0;
    for (const [num, interval] of pairs) {
      const val = Number(num);
      if (!Number.isInteger(val)) {
        return {
          status: 'error',
          info: `'${num}' is not an integer.`,
        };
      }

      switch (interval) {
        case 'yr':
        case 'yrs':
        case 'year':