index.js 3.4 KB

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  1. "use strict";
  2. var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
  3. Object.defineProperty(exports, "__esModule", {
  4. value: true
  5. });
  6. exports.default = setDay;
  7. var _index = _interopRequireDefault(require("../addDays/index.js"));
  8. var _index2 = _interopRequireDefault(require("../toDate/index.js"));
  9. var _index3 = _interopRequireDefault(require("../_lib/toInteger/index.js"));
  10. var _index4 = _interopRequireDefault(require("../_lib/requiredArgs/index.js"));
  11. var _index5 = require("../_lib/defaultOptions/index.js");
  12. /**
  13. * @name setDay
  14. * @category Weekday Helpers
  15. * @summary Set the day of the week to the given date.
  16. *
  17. * @description
  18. * Set the day of the week to the given date.
  19. *
  20. * @param {Date|Number} date - the date to be changed
  21. * @param {Number} day - the day of the week of the new date
  22. * @param {Object} [options] - an object with options.
  23. * @param {Locale} [options.locale=defaultLocale] - the locale object. See [Locale]{@link https://date-fns.org/docs/Locale}
  24. * @param {0|1|2|3|4|5|6} [options.weekStartsOn=0] - the index of the first day of the week (0 - Sunday)
  25. * @returns {Date} the new date with the day of the week set
  26. * @throws {TypeError} 2 arguments required
  27. * @throws {RangeError} `options.weekStartsOn` must be between 0 and 6
  28. *
  29. * @example
  30. * // Set week day to Sunday, with the default weekStartsOn of Sunday:
  31. * const result = setDay(new Date(2014, 8, 1), 0)
  32. * //=> Sun Aug 31 2014 00:00:00
  33. *
  34. * @example
  35. * // Set week day to Sunday, with a weekStartsOn of Monday:
  36. * const result = setDay(new Date(2014, 8, 1), 0, { weekStartsOn: 1 })
  37. * //=> Sun Sep 07 2014 00:00:00
  38. */
  39. function setDay(dirtyDate, dirtyDay, options) {
  40. var _ref, _ref2, _ref3, _options$weekStartsOn, _options$locale, _options$locale$optio, _defaultOptions$local, _defaultOptions$local2;
  41. (0, _index4.default)(2, arguments);
  42. var defaultOptions = (0, _index5.getDefaultOptions)();
  43. var weekStartsOn = (0, _index3.default)((_ref = (_ref2 = (_ref3 = (_options$weekStartsOn = options === null || options === void 0 ? void 0 : options.weekStartsOn) !== null && _options$weekStartsOn !== void 0 ? _options$weekStartsOn : options === null || options === void 0 ? void 0 : (_options$locale = options.locale) === null || _options$locale === void 0 ? void 0 : (_options$locale$optio = _options$locale.options) === null || _options$locale$optio === void 0 ? void 0 : _options$locale$optio.weekStartsOn) !== null && _ref3 !== void 0 ? _ref3 : defaultOptions.weekStartsOn) !== null && _ref2 !== void 0 ? _ref2 : (_defaultOptions$local = defaultOptions.locale) === null || _defaultOptions$local === void 0 ? void 0 : (_defaultOptions$local2 = _defaultOptions$local.options) === null || _defaultOptions$local2 === void 0 ? void 0 : _defaultOptions$local2.weekStartsOn) !== null && _ref !== void 0 ? _ref : 0);
  44. // Test if weekStartsOn is between 0 and 6 _and_ is not NaN
  45. if (!(weekStartsOn >= 0 && weekStartsOn <= 6)) {
  46. throw new RangeError('weekStartsOn must be between 0 and 6 inclusively');
  47. }
  48. var date = (0, _index2.default)(dirtyDate);
  49. var day = (0, _index3.default)(dirtyDay);
  50. var currentDay = date.getDay();
  51. var remainder = day % 7;
  52. var dayIndex = (remainder + 7) % 7;
  53. var delta = 7 - weekStartsOn;
  54. var diff = day < 0 || day > 6 ? day - (currentDay + delta) % 7 : (dayIndex + delta) % 7 - (currentDay + delta) % 7;
  55. return (0, _index.default)(date, diff);
  56. }
  57. module.exports = exports.default;