@onesy/date/esm/is.js

Time and date utils library

import OnesyDate, { units } from './OnesyDate';
export default function is() {
  let value = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : OnesyDate.onesyDate;
  let query = arguments.length > 1 ? arguments[1] : undefined;
  let value1 = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : OnesyDate.onesyDate;
  let unit = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : 'milliseconds';
  let value2 = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : OnesyDate.onesyDate;

  if (value && value.valid) {
    if (value1 && value1.valid) {
      const diffs = {};
      units.forEach(unit_ => diffs[unit_] = Math.floor(value[unit_] - value1[unit_]));
      const queryValue = diffs[unit];

      switch (query) {
        case 'before':
          return queryValue < 0;

        case 'after':
          return queryValue > 0;

        case 'same':
          return queryValue === 0;

        case 'between':
          if (value2 && value2.valid) {
            return is(value2, 'after or same', value) && is(value2, 'before or same', value1) || is(value2, 'after or same', value1) && is(value2, 'before or same', value);
          }

          return false;

        case 'before or same':
          return queryValue <= 0;

        case 'after or same':
          return queryValue >= 0;

        default:
          break;
      }
    }

    switch (query) {
      case 'leap-year':
        return value.year % 4 === 0 && value.year % 100 !== 0 || value.year % 400 === 0;

      case 'leap-month':
        return value.month === 2 && value.daysInMonth === 29;

      default:
        return false;
    }
  }
}