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 王天杨
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import { differenceInCalendarDays } from "./differenceInCalendarDays.mjs";
import { format } from "./format.mjs";
import { toDate } from "./toDate.mjs";
import { defaultLocale } from "./_lib/defaultLocale.mjs";
import { getDefaultOptions } from "./_lib/defaultOptions.mjs";
/**
* The {@link formatRelative} function options.
*/
/**
* @name formatRelative
* @category Common Helpers
* @summary Represent the date in words relative to the given base date.
*
* @description
* Represent the date in words relative to the given base date.
*
* | Distance to the base date | Result |
* |---------------------------|---------------------------|
* | Previous 6 days | last Sunday at 04:30 AM |
* | Last day | yesterday at 04:30 AM |
* | Same day | today at 04:30 AM |
* | Next day | tomorrow at 04:30 AM |
* | Next 6 days | Sunday at 04:30 AM |
* | Other | 12/31/2017 |
*
* @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 date to format
* @param baseDate - The date to compare with
* @param options - An object with options
*
* @returns The date in words
*
* @throws `date` must not be Invalid Date
* @throws `baseDate` must not be Invalid Date
* @throws `options.locale` must contain `localize` property
* @throws `options.locale` must contain `formatLong` property
* @throws `options.locale` must contain `formatRelative` property
*
* @example
* // Represent the date of 6 days ago in words relative to the given base date. In this example, today is Wednesday
* const result = formatRelative(subDays(new Date(), 6), new Date())
* //=> "last Thursday at 12:45 AM"
*/
export function formatRelative(date, baseDate, options) {
const _date = toDate(date);
const _baseDate = toDate(baseDate);
const defaultOptions = getDefaultOptions();
const locale = options?.locale ?? defaultOptions.locale ?? defaultLocale;
const weekStartsOn =
options?.weekStartsOn ??
options?.locale?.options?.weekStartsOn ??
defaultOptions.weekStartsOn ??
defaultOptions.locale?.options?.weekStartsOn ??
0;
const diff = differenceInCalendarDays(_date, _baseDate);
if (isNaN(diff)) {
throw new RangeError("Invalid time value");
}
let token;
if (diff < -6) {
token = "other";
} else if (diff < -1) {
token = "lastWeek";
} else if (diff < 0) {
token = "yesterday";
} else if (diff < 1) {
token = "today";
} else if (diff < 2) {
token = "tomorrow";
} else if (diff < 7) {
token = "nextWeek";
} else {
token = "other";
}
const formatStr = locale.formatRelative(token, _date, _baseDate, {
locale,
weekStartsOn,
});
return format(_date, formatStr, { locale, weekStartsOn });
}
// Fallback for modularized imports:
export default formatRelative;
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