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