bc518174
 王天杨
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import { isValid } from "./isValid.mjs";
import { toDate } from "./toDate.mjs";
import { addLeadingZeros } from "./_lib/addLeadingZeros.mjs";
/**
* The {@link formatRFC3339} function options.
*/
/**
* @name formatRFC3339
* @category Common Helpers
* @summary Format the date according to the RFC 3339 standard (https://tools.ietf.org/html/rfc3339#section-5.6).
*
* @description
* Return the formatted date string in RFC 3339 format. Options may be passed to control the parts and notations of the date.
*
* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
*
* @param date - The original date
* @param options - An object with options.
*
* @returns The formatted date string
*
* @throws `date` must not be Invalid Date
*
* @example
* // Represent 18 September 2019 in RFC 3339 format:
* formatRFC3339(new Date(2019, 8, 18, 19, 0, 52))
* //=> '2019-09-18T19:00:52Z'
*
* @example
* // Represent 18 September 2019 in RFC 3339 format, 3 digits of second fraction
* formatRFC3339(new Date(2019, 8, 18, 19, 0, 52, 234), {
* fractionDigits: 3
* })
* //=> '2019-09-18T19:00:52.234Z'
*/
export function formatRFC3339(date, options) {
const _date = toDate(date);
if (!isValid(_date)) {
throw new RangeError("Invalid time value");
}
const fractionDigits = options?.fractionDigits ?? 0;
const day = addLeadingZeros(_date.getDate(), 2);
const month = addLeadingZeros(_date.getMonth() + 1, 2);
const year = _date.getFullYear();
const hour = addLeadingZeros(_date.getHours(), 2);
const minute = addLeadingZeros(_date.getMinutes(), 2);
const second = addLeadingZeros(_date.getSeconds(), 2);
let fractionalSecond = "";
if (fractionDigits > 0) {
const milliseconds = _date.getMilliseconds();
const fractionalSeconds = Math.trunc(
milliseconds * Math.pow(10, fractionDigits - 3),
);
fractionalSecond = "." + addLeadingZeros(fractionalSeconds, fractionDigits);
}
let offset = "";
const tzOffset = _date.getTimezoneOffset();
if (tzOffset !== 0) {
const absoluteOffset = Math.abs(tzOffset);
const hourOffset = addLeadingZeros(Math.trunc(absoluteOffset / 60), 2);
const minuteOffset = addLeadingZeros(absoluteOffset % 60, 2);
// If less than 0, the sign is +, because it is ahead of time.
const sign = tzOffset < 0 ? "+" : "-";
offset = `${sign}${hourOffset}:${minuteOffset}`;
} else {
offset = "Z";
}
return `${year}-${month}-${day}T${hour}:${minute}:${second}${fractionalSecond}${offset}`;
}
// Fallback for modularized imports:
export default formatRFC3339;
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