isDate.js 5.3 KB

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  1. function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
  2. function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
  3. function _iterableToArrayLimit(r, l) { var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"]; if (null != t) { var e, n, i, u, a = [], f = !0, o = !1; try { if (i = (t = t.call(r)).next, 0 === l) { if (Object(t) !== t) return; f = !1; } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0); } catch (r) { o = !0, n = r; } finally { try { if (!f && null != t["return"] && (u = t["return"](), Object(u) !== u)) return; } finally { if (o) throw n; } } return a; } }
  4. function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
  5. function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it["return"] != null) it["return"](); } finally { if (didErr) throw err; } } }; }
  6. function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
  7. function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
  8. import merge from './util/merge';
  9. var default_date_options = {
  10. format: 'YYYY/MM/DD',
  11. delimiters: ['/', '-'],
  12. strictMode: false
  13. };
  14. function isValidFormat(format) {
  15. return /(^(y{4}|y{2})[.\/-](m{1,2})[.\/-](d{1,2})$)|(^(m{1,2})[.\/-](d{1,2})[.\/-]((y{4}|y{2})$))|(^(d{1,2})[.\/-](m{1,2})[.\/-]((y{4}|y{2})$))/gi.test(format);
  16. }
  17. function zip(date, format) {
  18. var zippedArr = [],
  19. len = Math.min(date.length, format.length);
  20. for (var i = 0; i < len; i++) {
  21. zippedArr.push([date[i], format[i]]);
  22. }
  23. return zippedArr;
  24. }
  25. export default function isDate(input, options) {
  26. if (typeof options === 'string') {
  27. // Allow backward compatibility for old format isDate(input [, format])
  28. options = merge({
  29. format: options
  30. }, default_date_options);
  31. } else {
  32. options = merge(options, default_date_options);
  33. }
  34. if (typeof input === 'string' && isValidFormat(options.format)) {
  35. var formatDelimiter = options.delimiters.find(function (delimiter) {
  36. return options.format.indexOf(delimiter) !== -1;
  37. });
  38. var dateDelimiter = options.strictMode ? formatDelimiter : options.delimiters.find(function (delimiter) {
  39. return input.indexOf(delimiter) !== -1;
  40. });
  41. var dateAndFormat = zip(input.split(dateDelimiter), options.format.toLowerCase().split(formatDelimiter));
  42. var dateObj = {};
  43. var _iterator = _createForOfIteratorHelper(dateAndFormat),
  44. _step;
  45. try {
  46. for (_iterator.s(); !(_step = _iterator.n()).done;) {
  47. var _step$value = _slicedToArray(_step.value, 2),
  48. dateWord = _step$value[0],
  49. formatWord = _step$value[1];
  50. if (dateWord.length !== formatWord.length) {
  51. return false;
  52. }
  53. dateObj[formatWord.charAt(0)] = dateWord;
  54. }
  55. } catch (err) {
  56. _iterator.e(err);
  57. } finally {
  58. _iterator.f();
  59. }
  60. var fullYear = dateObj.y;
  61. // Check if the year starts with a hyphen
  62. if (fullYear.startsWith('-')) {
  63. return false; // Hyphen before year is not allowed
  64. }
  65. if (dateObj.y.length === 2) {
  66. var parsedYear = parseInt(dateObj.y, 10);
  67. if (isNaN(parsedYear)) {
  68. return false;
  69. }
  70. var currentYearLastTwoDigits = new Date().getFullYear() % 100;
  71. if (parsedYear < currentYearLastTwoDigits) {
  72. fullYear = "20".concat(dateObj.y);
  73. } else {
  74. fullYear = "19".concat(dateObj.y);
  75. }
  76. }
  77. var month = dateObj.m;
  78. if (dateObj.m.length === 1) {
  79. month = "0".concat(dateObj.m);
  80. }
  81. var day = dateObj.d;
  82. if (dateObj.d.length === 1) {
  83. day = "0".concat(dateObj.d);
  84. }
  85. return new Date("".concat(fullYear, "-").concat(month, "-").concat(day, "T00:00:00.000Z")).getUTCDate() === +dateObj.d;
  86. }
  87. if (!options.strictMode) {
  88. return Object.prototype.toString.call(input) === '[object Date]' && isFinite(input);
  89. }
  90. return false;
  91. }