42 lines
2.1 KiB
JavaScript
42 lines
2.1 KiB
JavaScript
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import assertString from './util/assertString';
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/* eslint-disable max-len */
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// from http://goo.gl/0ejHHW
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var iso8601 = /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-3])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T\s]((([01]\d|2[0-3])((:?)[0-5]\d)?|24:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/;
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// same as above, except with a strict 'T' separator between date and time
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var iso8601StrictSeparator = /^([\+-]?\d{4}(?!\d{2}\b))((-?)((0[1-9]|1[0-2])(\3([12]\d|0[1-9]|3[01]))?|W([0-4]\d|5[0-3])(-?[1-7])?|(00[1-9]|0[1-9]\d|[12]\d{2}|3([0-5]\d|6[1-6])))([T]((([01]\d|2[0-3])((:?)[0-5]\d)?|24:?00)([\.,]\d+(?!:))?)?(\17[0-5]\d([\.,]\d+)?)?([zZ]|([\+-])([01]\d|2[0-3]):?([0-5]\d)?)?)?)?$/;
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/* eslint-enable max-len */
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var isValidDate = function isValidDate(str) {
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// str must have passed the ISO8601 check
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// this check is meant to catch invalid dates
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// like 2009-02-31
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// first check for ordinal dates
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var ordinalMatch = str.match(/^(\d{4})-?(\d{3})([ T]{1}\.*|$)/);
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if (ordinalMatch) {
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var oYear = Number(ordinalMatch[1]);
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var oDay = Number(ordinalMatch[2]);
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// if is leap year
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if (oYear % 4 === 0 && oYear % 100 !== 0 || oYear % 400 === 0) return oDay <= 366;
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return oDay <= 365;
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}
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var match = str.match(/(\d{4})-?(\d{0,2})-?(\d*)/).map(Number);
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var year = match[1];
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var month = match[2];
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var day = match[3];
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var monthString = month ? "0".concat(month).slice(-2) : month;
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var dayString = day ? "0".concat(day).slice(-2) : day;
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// create a date object and compare
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var d = new Date("".concat(year, "-").concat(monthString || '01', "-").concat(dayString || '01'));
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if (month && day) {
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return d.getUTCFullYear() === year && d.getUTCMonth() + 1 === month && d.getUTCDate() === day;
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}
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return true;
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};
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export default function isISO8601(str) {
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var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
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assertString(str);
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var check = options.strictSeparator ? iso8601StrictSeparator.test(str) : iso8601.test(str);
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if (check && options.strict) return isValidDate(str);
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return check;
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}
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