element-web-Github/src/DateUtils.ts
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TypeScript

/*
Copyright 2024 New Vector Ltd.
Copyright 2022 The Matrix.org Foundation C.I.C.
Copyright 2017 Vector Creations Ltd
Copyright 2015, 2016 OpenMarket Ltd
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
import { Optional } from "matrix-events-sdk";
import { _t, getUserLanguage } from "./languageHandler";
import { getUserTimezone } from "./TimezoneHandler";
export const MINUTE_MS = 60000;
export const HOUR_MS = MINUTE_MS * 60;
export const DAY_MS = HOUR_MS * 24;
/**
* Returns array of 7 weekday names, from Sunday to Saturday, internationalised to the user's language.
* @param weekday - format desired "short" | "long" | "narrow"
*/
export function getDaysArray(weekday: Intl.DateTimeFormatOptions["weekday"] = "short"): string[] {
const sunday = 1672574400000; // 2023-01-01 12:00 UTC
const { format } = new Intl.DateTimeFormat(getUserLanguage(), { weekday, timeZone: "UTC" });
return [...Array(7).keys()].map((day) => format(sunday + day * DAY_MS));
}
/**
* Returns array of 12 month names, from January to December, internationalised to the user's language.
* @param month - format desired "numeric" | "2-digit" | "long" | "short" | "narrow"
*/
export function getMonthsArray(month: Intl.DateTimeFormatOptions["month"] = "short"): string[] {
const { format } = new Intl.DateTimeFormat(getUserLanguage(), { month, timeZone: "UTC" });
return [...Array(12).keys()].map((m) => format(Date.UTC(2021, m)));
}
// XXX: Ideally we could just specify `hour12: boolean` but it has issues on Chrome in the `en` locale
// https://support.google.com/chrome/thread/29828561?hl=en
function getTwelveHourOptions(showTwelveHour: boolean): Intl.DateTimeFormatOptions {
return {
hourCycle: showTwelveHour ? "h12" : "h23",
};
}
/**
* Formats a given date to a date & time string.
*
* The output format depends on how far away the given date is from now.
* Will use the browser's default time zone.
* If the date is today it will return a time string excluding seconds. See {@formatTime}.
* If the date is within the last 6 days it will return the name of the weekday along with the time string excluding seconds.
* If the date is within the same year then it will return the weekday, month and day of the month along with the time string excluding seconds.
* Otherwise, it will return a string representing the full date & time in a human friendly manner. See {@formatFullDate}.
* @param date - date object to format
* @param showTwelveHour - whether to use 12-hour rather than 24-hour time. Defaults to `false` (24 hour mode).
* Overrides the default from the locale, whether `true` or `false`.
* @param locale - the locale string to use, in BCP 47 format, defaulting to user's selected application locale
*/
export function formatDate(date: Date, showTwelveHour = false, locale?: string): string {
const _locale = locale ?? getUserLanguage();
const now = new Date();
if (date.toDateString() === now.toDateString()) {
return formatTime(date, showTwelveHour, _locale);
} else if (now.getTime() - date.getTime() < 6 * DAY_MS) {
// Time is within the last 6 days (or in the future)
return new Intl.DateTimeFormat(_locale, {
...getTwelveHourOptions(showTwelveHour),
weekday: "short",
hour: "numeric",
minute: "2-digit",
timeZone: getUserTimezone(),
}).format(date);
} else if (now.getFullYear() === date.getFullYear()) {
return new Intl.DateTimeFormat(_locale, {
...getTwelveHourOptions(showTwelveHour),
weekday: "short",
month: "short",
day: "numeric",
hour: "numeric",
minute: "2-digit",
timeZone: getUserTimezone(),
}).format(date);
}
return formatFullDate(date, showTwelveHour, false, _locale);
}
/**
* Formats a given date to a human-friendly string with short weekday.
* Will use the browser's default time zone.
* @example "Thu, 17 Nov 2022" in en-GB locale
* @param date - date object to format
* @param locale - the locale string to use, in BCP 47 format, defaulting to user's selected application locale
*/
export function formatFullDateNoTime(date: Date, locale?: string): string {
return new Intl.DateTimeFormat(locale ?? getUserLanguage(), {
weekday: "short",
month: "short",
day: "numeric",
year: "numeric",
timeZone: getUserTimezone(),
}).format(date);
}
/**
* Formats a given date to a date & time string, optionally including seconds.
* Will use the browser's default time zone.
* @example "Thu, 17 Nov 2022, 4:58:32 pm" in en-GB locale with showTwelveHour=true and showSeconds=true
* @param date - date object to format
* @param showTwelveHour - whether to use 12-hour rather than 24-hour time. Defaults to `false` (24 hour mode).
* Overrides the default from the locale, whether `true` or `false`.
* @param showSeconds - whether to include seconds in the time portion of the string
* @param locale - the locale string to use, in BCP 47 format, defaulting to user's selected application locale
*/
export function formatFullDate(date: Date, showTwelveHour = false, showSeconds = true, locale?: string): string {
return new Intl.DateTimeFormat(locale ?? getUserLanguage(), {
...getTwelveHourOptions(showTwelveHour),
weekday: "short",
month: "short",
day: "numeric",
year: "numeric",
hour: "numeric",
minute: "2-digit",
second: showSeconds ? "2-digit" : undefined,
timeZone: getUserTimezone(),
}).format(date);
}
/**
* Formats dates to be compatible with attributes of a `<input type="date">`. Dates
* should be formatted like "2020-06-23" (formatted according to ISO8601).
*
* @param date The date to format.
* @returns The date string in ISO8601 format ready to be used with an `<input>`
*/
export function formatDateForInput(date: Date): string {
const year = `${date.getFullYear()}`.padStart(4, "0");
const month = `${date.getMonth() + 1}`.padStart(2, "0");
const day = `${date.getDate()}`.padStart(2, "0");
return `${year}-${month}-${day}`;
}
/**
* Formats a given date to a time string including seconds.
* Will use the browser's default time zone.
* @example "4:58:32 PM" in en-GB locale with showTwelveHour=true
* @example "16:58:32" in en-GB locale with showTwelveHour=false
* @param date - date object to format
* @param showTwelveHour - whether to use 12-hour rather than 24-hour time. Defaults to `false` (24 hour mode).
* Overrides the default from the locale, whether `true` or `false`.
* @param locale - the locale string to use, in BCP 47 format, defaulting to user's selected application locale
*/
export function formatFullTime(date: Date, showTwelveHour = false, locale?: string): string {
return new Intl.DateTimeFormat(locale ?? getUserLanguage(), {
...getTwelveHourOptions(showTwelveHour),
hour: "numeric",
minute: "2-digit",
second: "2-digit",
timeZone: getUserTimezone(),
}).format(date);
}
/**
* Formats a given date to a time string excluding seconds.
* Will use the browser's default time zone.
* @example "4:58 PM" in en-GB locale with showTwelveHour=true
* @example "16:58" in en-GB locale with showTwelveHour=false
* @param date - date object to format
* @param showTwelveHour - whether to use 12-hour rather than 24-hour time. Defaults to `false` (24 hour mode).
* Overrides the default from the locale, whether `true` or `false`.
* @param locale - the locale string to use, in BCP 47 format, defaulting to user's selected application locale
*/
export function formatTime(date: Date, showTwelveHour = false, locale?: string): string {
return new Intl.DateTimeFormat(locale ?? getUserLanguage(), {
...getTwelveHourOptions(showTwelveHour),
hour: "numeric",
minute: "2-digit",
timeZone: getUserTimezone(),
}).format(date);
}
export function formatSeconds(inSeconds: number): string {
const isNegative = inSeconds < 0;
inSeconds = Math.abs(inSeconds);
const hours = Math.floor(inSeconds / (60 * 60))
.toFixed(0)
.padStart(2, "0");
const minutes = Math.floor((inSeconds % (60 * 60)) / 60)
.toFixed(0)
.padStart(2, "0");
const seconds = Math.floor((inSeconds % (60 * 60)) % 60)
.toFixed(0)
.padStart(2, "0");
let output = "";
if (hours !== "00") output += `${hours}:`;
output += `${minutes}:${seconds}`;
if (isNegative) {
output = "-" + output;
}
return output;
}
export function formatTimeLeft(inSeconds: number): string {
const hours = Math.floor(inSeconds / (60 * 60)).toFixed(0);
const minutes = Math.floor((inSeconds % (60 * 60)) / 60).toFixed(0);
const seconds = Math.floor((inSeconds % (60 * 60)) % 60).toFixed(0);
if (hours !== "0") {
return _t("time|hours_minutes_seconds_left", {
hours,
minutes,
seconds,
});
}
if (minutes !== "0") {
return _t("time|minutes_seconds_left", {
minutes,
seconds,
});
}
return _t("time|seconds_left", {
seconds,
});
}
function withinPast24Hours(prevDate: Date, nextDate: Date): boolean {
return Math.abs(prevDate.getTime() - nextDate.getTime()) <= DAY_MS;
}
function withinCurrentDay(prevDate: Date, nextDate: Date): boolean {
return withinPast24Hours(prevDate, nextDate) && prevDate.getDay() === nextDate.getDay();
}
function withinCurrentYear(prevDate: Date, nextDate: Date): boolean {
return prevDate.getFullYear() === nextDate.getFullYear();
}
export function wantsDateSeparator(prevEventDate: Optional<Date>, nextEventDate: Optional<Date>): boolean {
if (!nextEventDate || !prevEventDate) {
return false;
}
// Return early for events that are > 24h apart
if (!withinPast24Hours(prevEventDate, nextEventDate)) {
return true;
}
// Compare weekdays
return prevEventDate.getDay() !== nextEventDate.getDay();
}
export function formatFullDateNoDay(date: Date): string {
const locale = getUserLanguage();
return _t("time|date_at_time", {
date: date.toLocaleDateString(locale).replace(/\//g, "-"),
time: date.toLocaleTimeString(locale).replace(/:/g, "-"),
});
}
/**
* Returns an ISO date string without textual description of the date (ie: no "Wednesday" or similar)
* @param date The date to format.
* @returns The date string in ISO format.
*/
export function formatFullDateNoDayISO(date: Date): string {
return date.toISOString();
}
/**
* Formats a given date to a string.
* Will use the browser's default time zone.
* @example 17/11/2022 in en-GB locale
* @param date - date object to format
* @param locale - the locale string to use, in BCP 47 format, defaulting to user's selected application locale
*/
export function formatFullDateNoDayNoTime(date: Date, locale?: string): string {
return new Intl.DateTimeFormat(locale ?? getUserLanguage(), {
year: "numeric",
month: "numeric",
day: "numeric",
timeZone: getUserTimezone(),
}).format(date);
}
export function formatRelativeTime(date: Date, showTwelveHour = false): string {
const now = new Date();
if (withinCurrentDay(date, now)) {
return formatTime(date, showTwelveHour);
} else {
const months = getMonthsArray();
let relativeDate = `${months[date.getMonth()]} ${date.getDate()}`;
if (!withinCurrentYear(date, now)) {
relativeDate += `, ${date.getFullYear()}`;
}
return relativeDate;
}
}
/**
* Formats duration in ms to human-readable string
* Returns value in the biggest possible unit (day, hour, min, second)
* Rounds values up until unit threshold
* i.e. 23:13:57 -> 23h, 24:13:57 -> 1d, 44:56:56 -> 2d
*/
export function formatDuration(durationMs: number): string {
if (durationMs >= DAY_MS) {
return _t("time|short_days", { value: Math.round(durationMs / DAY_MS) });
}
if (durationMs >= HOUR_MS) {
return _t("time|short_hours", { value: Math.round(durationMs / HOUR_MS) });
}
if (durationMs >= MINUTE_MS) {
return _t("time|short_minutes", { value: Math.round(durationMs / MINUTE_MS) });
}
return _t("time|short_seconds", { value: Math.round(durationMs / 1000) });
}
/**
* Formats duration in ms to human-readable string
* Returns precise value down to the nearest second
* i.e. 23:13:57 -> 23h 13m 57s, 44:56:56 -> 1d 20h 56m 56s
*/
export function formatPreciseDuration(durationMs: number): string {
const days = Math.floor(durationMs / DAY_MS);
const hours = Math.floor((durationMs % DAY_MS) / HOUR_MS);
const minutes = Math.floor((durationMs % HOUR_MS) / MINUTE_MS);
const seconds = Math.floor((durationMs % MINUTE_MS) / 1000);
if (days > 0) {
return _t("time|short_days_hours_minutes_seconds", { days, hours, minutes, seconds });
}
if (hours > 0) {
return _t("time|short_hours_minutes_seconds", { hours, minutes, seconds });
}
if (minutes > 0) {
return _t("time|short_minutes_seconds", { minutes, seconds });
}
return _t("time|short_seconds", { value: seconds });
}
/**
* Formats a timestamp to a short date
* Similar to {@formatFullDateNoDayNoTime} but with 2-digit on day, month, year.
* @example 25/12/22 in en-GB locale
* @param timestamp - epoch timestamp
* @param locale - the locale string to use, in BCP 47 format, defaulting to user's selected application locale
* @returns {string} formattedDate
*/
export const formatLocalDateShort = (timestamp: number, locale?: string): string =>
new Intl.DateTimeFormat(locale ?? getUserLanguage(), {
day: "2-digit",
month: "2-digit",
year: "2-digit",
timeZone: getUserTimezone(),
}).format(timestamp);