pomeranian-durations/lib/validate.js

An immutable duration library based on the ISO-8601 format for durations.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.whenInvalidDuration = exports.whenInvalid = exports.isInvalid = exports.isValid = void 0;

var _constants = require("./constants");

var _utils = require("./_utils");

/**
 * Helpers for validating ISO8601 durations.
 * @name default
 */
var MATCH_NUMBER = /[+-]?\d+(\.\d+)?/.source;
var MATCH_DATE = (0, _utils.createRegexBuilder)().and("(".concat(MATCH_NUMBER, "Y)?")).and("(".concat(MATCH_NUMBER, "M)?")).and("(".concat(MATCH_NUMBER, "W)?")).and("(".concat(MATCH_NUMBER, "D)?"));
var MATCH_TIME = (0, _utils.createRegexBuilder)().maybe((0, _utils.createRegexBuilder)().and(_constants.TIME_DESIGNATOR).and("(".concat(MATCH_NUMBER, "H)?")).and("(".concat(MATCH_NUMBER, "M)?")).and("(".concat(MATCH_NUMBER, "S)?")));
var MATCH_DURATION = (0, _utils.createRegexBuilder)().startOfLine().and(_constants.DURATION_DESIGNATOR).and(MATCH_TIME).and(MATCH_DATE).and(MATCH_TIME).endOfLine();
/**
 * Returns if the iso8601 duration is valid or not.
 * @param isoDuration
 * @returns {boolean}
 * @example
 * isValid('PT1S') // => true
 * @example
 * isValid('invalid') // => false
 */

var isValid = function isValid(isoDuration) {
  return typeof isoDuration === 'string' && MATCH_DURATION.test(isoDuration.toUpperCase());
};
/**
 * Returns if the iso8601 duration is invalid or not.
 * @param isoDuration {string}
 * @returns {boolean}
 * @example
 * isInvalid('invalid') // => true
 * @example
 * isInvalid('PT1S') // => false
 */


exports.isValid = isValid;

var isInvalid = function isInvalid(isoDuration) {
  return !isValid(isoDuration);
};
/**
 * Returns a default value when the given duration is invalid and duration when it is valid.
 * @param value {string}
 * @param isoDuration {string}
 * @example
 * const add10 = compose(
 *   add(10),
 *   whenInvalid(() => { throw new Error('Invalid duration') }),
 * );
 *
 * add10('invalid') // error: 'Invalid duration'
 */


exports.isInvalid = isInvalid;
var whenInvalid = (0, _utils.curry)(function (value, isoDuration) {
  if (isValid(isoDuration)) {
    return isoDuration;
  }

  if (typeof value === 'function') {
    return value(isoDuration);
  }

  return value;
});
/**
 * Returns a given default value when the given duration matches the string 'Invalid Duration'.
 * In comparison to whenInvalid the function only returns the default value when it exactly matches
 * the 'Invalid Duration' string. Otherwise it just returns the value. In many cases you would prefer
 * this function over `whenInvalid`.
 *
 * @param value {string}
 * @param isoDuration {string}
 * @example
 * const convertToHours = compose(
 *   asHours,
 *   whenInvalidDuration(null),
 * );
 *
 * convertToHours('PT10H') // 10
 * convertToHours('Blub') // null
 */

exports.whenInvalid = whenInvalid;
var whenInvalidDuration = (0, _utils.curry)(function (value, isoDuration) {
  if (isoDuration !== _constants.INVALID_DURATION) {
    return isoDuration;
  }

  if (typeof value === 'function') {
    return value(isoDuration);
  }

  return value;
});
exports.whenInvalidDuration = whenInvalidDuration;