210 lines
8.0 KiB
JavaScript
210 lines
8.0 KiB
JavaScript
import { compareAsc } from "./compareAsc.mjs";
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import { minutesInDay, minutesInMonth } from "./constants.mjs";
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import { differenceInMonths } from "./differenceInMonths.mjs";
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import { differenceInSeconds } from "./differenceInSeconds.mjs";
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import { toDate } from "./toDate.mjs";
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import { defaultLocale } from "./_lib/defaultLocale.mjs";
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import { getDefaultOptions } from "./_lib/defaultOptions.mjs";
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import { getTimezoneOffsetInMilliseconds } from "./_lib/getTimezoneOffsetInMilliseconds.mjs";
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/**
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* The {@link formatDistance} function options.
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*/
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/**
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* @name formatDistance
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* @category Common Helpers
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* @summary Return the distance between the given dates in words.
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*
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* @description
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* Return the distance between the given dates in words.
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*
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* | Distance between dates | Result |
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* |-------------------------------------------------------------------|---------------------|
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* | 0 ... 30 secs | less than a minute |
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* | 30 secs ... 1 min 30 secs | 1 minute |
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* | 1 min 30 secs ... 44 mins 30 secs | [2..44] minutes |
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* | 44 mins ... 30 secs ... 89 mins 30 secs | about 1 hour |
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* | 89 mins 30 secs ... 23 hrs 59 mins 30 secs | about [2..24] hours |
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* | 23 hrs 59 mins 30 secs ... 41 hrs 59 mins 30 secs | 1 day |
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* | 41 hrs 59 mins 30 secs ... 29 days 23 hrs 59 mins 30 secs | [2..30] days |
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* | 29 days 23 hrs 59 mins 30 secs ... 44 days 23 hrs 59 mins 30 secs | about 1 month |
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* | 44 days 23 hrs 59 mins 30 secs ... 59 days 23 hrs 59 mins 30 secs | about 2 months |
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* | 59 days 23 hrs 59 mins 30 secs ... 1 yr | [2..12] months |
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* | 1 yr ... 1 yr 3 months | about 1 year |
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* | 1 yr 3 months ... 1 yr 9 month s | over 1 year |
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* | 1 yr 9 months ... 2 yrs | almost 2 years |
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* | N yrs ... N yrs 3 months | about N years |
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* | N yrs 3 months ... N yrs 9 months | over N years |
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* | N yrs 9 months ... N+1 yrs | almost N+1 years |
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*
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* With `options.includeSeconds == true`:
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* | Distance between dates | Result |
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* |------------------------|----------------------|
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* | 0 secs ... 5 secs | less than 5 seconds |
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* | 5 secs ... 10 secs | less than 10 seconds |
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* | 10 secs ... 20 secs | less than 20 seconds |
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* | 20 secs ... 40 secs | half a minute |
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* | 40 secs ... 60 secs | less than a minute |
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* | 60 secs ... 90 secs | 1 minute |
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*
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* @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).
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*
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* @param date - The date
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* @param baseDate - The date to compare with
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* @param options - An object with options
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*
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* @returns The distance in words
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*
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* @throws `date` must not be Invalid Date
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* @throws `baseDate` must not be Invalid Date
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* @throws `options.locale` must contain `formatDistance` property
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*
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* @example
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* // What is the distance between 2 July 2014 and 1 January 2015?
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* const result = formatDistance(new Date(2014, 6, 2), new Date(2015, 0, 1))
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* //=> '6 months'
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*
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* @example
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* // What is the distance between 1 January 2015 00:00:15
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* // and 1 January 2015 00:00:00, including seconds?
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* const result = formatDistance(
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* new Date(2015, 0, 1, 0, 0, 15),
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* new Date(2015, 0, 1, 0, 0, 0),
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* { includeSeconds: true }
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* )
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* //=> 'less than 20 seconds'
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*
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* @example
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* // What is the distance from 1 January 2016
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* // to 1 January 2015, with a suffix?
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* const result = formatDistance(new Date(2015, 0, 1), new Date(2016, 0, 1), {
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* addSuffix: true
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* })
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* //=> 'about 1 year ago'
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*
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* @example
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* // What is the distance between 1 August 2016 and 1 January 2015 in Esperanto?
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* import { eoLocale } from 'date-fns/locale/eo'
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* const result = formatDistance(new Date(2016, 7, 1), new Date(2015, 0, 1), {
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* locale: eoLocale
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* })
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* //=> 'pli ol 1 jaro'
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*/
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export function formatDistance(date, baseDate, options) {
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const defaultOptions = getDefaultOptions();
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const locale = options?.locale ?? defaultOptions.locale ?? defaultLocale;
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const minutesInAlmostTwoDays = 2520;
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const comparison = compareAsc(date, baseDate);
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if (isNaN(comparison)) {
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throw new RangeError("Invalid time value");
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}
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const localizeOptions = Object.assign({}, options, {
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addSuffix: options?.addSuffix,
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comparison: comparison,
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});
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let dateLeft;
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let dateRight;
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if (comparison > 0) {
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dateLeft = toDate(baseDate);
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dateRight = toDate(date);
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} else {
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dateLeft = toDate(date);
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dateRight = toDate(baseDate);
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}
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const seconds = differenceInSeconds(dateRight, dateLeft);
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const offsetInSeconds =
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(getTimezoneOffsetInMilliseconds(dateRight) -
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getTimezoneOffsetInMilliseconds(dateLeft)) /
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1000;
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const minutes = Math.round((seconds - offsetInSeconds) / 60);
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let months;
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// 0 up to 2 mins
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if (minutes < 2) {
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if (options?.includeSeconds) {
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if (seconds < 5) {
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return locale.formatDistance("lessThanXSeconds", 5, localizeOptions);
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} else if (seconds < 10) {
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return locale.formatDistance("lessThanXSeconds", 10, localizeOptions);
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} else if (seconds < 20) {
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return locale.formatDistance("lessThanXSeconds", 20, localizeOptions);
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} else if (seconds < 40) {
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return locale.formatDistance("halfAMinute", 0, localizeOptions);
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} else if (seconds < 60) {
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return locale.formatDistance("lessThanXMinutes", 1, localizeOptions);
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} else {
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return locale.formatDistance("xMinutes", 1, localizeOptions);
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}
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} else {
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if (minutes === 0) {
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return locale.formatDistance("lessThanXMinutes", 1, localizeOptions);
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} else {
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return locale.formatDistance("xMinutes", minutes, localizeOptions);
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}
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}
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// 2 mins up to 0.75 hrs
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} else if (minutes < 45) {
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return locale.formatDistance("xMinutes", minutes, localizeOptions);
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// 0.75 hrs up to 1.5 hrs
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} else if (minutes < 90) {
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return locale.formatDistance("aboutXHours", 1, localizeOptions);
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// 1.5 hrs up to 24 hrs
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} else if (minutes < minutesInDay) {
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const hours = Math.round(minutes / 60);
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return locale.formatDistance("aboutXHours", hours, localizeOptions);
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// 1 day up to 1.75 days
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} else if (minutes < minutesInAlmostTwoDays) {
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return locale.formatDistance("xDays", 1, localizeOptions);
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// 1.75 days up to 30 days
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} else if (minutes < minutesInMonth) {
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const days = Math.round(minutes / minutesInDay);
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return locale.formatDistance("xDays", days, localizeOptions);
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// 1 month up to 2 months
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} else if (minutes < minutesInMonth * 2) {
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months = Math.round(minutes / minutesInMonth);
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return locale.formatDistance("aboutXMonths", months, localizeOptions);
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}
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months = differenceInMonths(dateRight, dateLeft);
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// 2 months up to 12 months
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if (months < 12) {
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const nearestMonth = Math.round(minutes / minutesInMonth);
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return locale.formatDistance("xMonths", nearestMonth, localizeOptions);
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// 1 year up to max Date
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} else {
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const monthsSinceStartOfYear = months % 12;
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const years = Math.trunc(months / 12);
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// N years up to 1 years 3 months
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if (monthsSinceStartOfYear < 3) {
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return locale.formatDistance("aboutXYears", years, localizeOptions);
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// N years 3 months up to N years 9 months
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} else if (monthsSinceStartOfYear < 9) {
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return locale.formatDistance("overXYears", years, localizeOptions);
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// N years 9 months up to N year 12 months
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} else {
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return locale.formatDistance("almostXYears", years + 1, localizeOptions);
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}
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}
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}
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// Fallback for modularized imports:
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export default formatDistance;
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