Acme.BookStore.HttpApi.Host/node_modules/luxon/src/info.js

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import DateTime from "./datetime.js";
import Settings from "./settings.js";
import Locale from "./impl/locale.js";
import IANAZone from "./zones/IANAZone.js";
import { normalizeZone } from "./impl/zoneUtil.js";

import { hasFormatToParts, hasIntl, hasRelative } from "./impl/util.js";

/**
 * The Info class contains static methods for retrieving general time and date related data. For example, it has methods for finding out if a time zone has a DST, for listing the months in any supported locale, and for discovering which of Luxon features are available in the current environment.
 */
export default class Info {
  /**
   * Return whether the specified zone contains a DST.
   * @param {string|Zone} [zone='local'] - Zone to check. Defaults to the environment's local zone.
   * @return {boolean}
   */
  static hasDST(zone = Settings.defaultZone) {
    const proto = DateTime.local()
      .setZone(zone)
      .set({ month: 12 });

    return !zone.universal && proto.offset !== proto.set({ month: 6 }).offset;
  }

  /**
   * Return whether the specified zone is a valid IANA specifier.
   * @param {string} zone - Zone to check
   * @return {boolean}
   */
  static isValidIANAZone(zone) {
    return IANAZone.isValidSpecifier(zone) && IANAZone.isValidZone(zone);
  }

  /**
   * Converts the input into a {@link Zone} instance.
   *
   * * If `input` is already a Zone instance, it is returned unchanged.
   * * If `input` is a string containing a valid time zone name, a Zone instance
   *   with that name is returned.
   * * If `input` is a string that doesn't refer to a known time zone, a Zone
   *   instance with {@link Zone.isValid} == false is returned.
   * * If `input is a number, a Zone instance with the specified fixed offset
   *   in minutes is returned.
   * * If `input` is `null` or `undefined`, the default zone is returned.
   * @param {string|Zone|number} [input] - the value to be converted
   * @return {Zone}
   */
  static normalizeZone(input) {
    return normalizeZone(input, Settings.defaultZone);
  }

  /**
   * Return an array of standalone month names.
   * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DateTimeFormat
   * @param {string} [length='long'] - the length of the month representation, such as "numeric", "2-digit", "narrow", "short", "long"
   * @param {Object} opts - options
   * @param {string} [opts.locale] - the locale code
   * @param {string} [opts.numberingSystem=null] - the numbering system
   * @param {string} [opts.outputCalendar='gregory'] - the calendar