94 lines
2.6 KiB
TypeScript
94 lines
2.6 KiB
TypeScript
// Copyright 2023 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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import { HourCyclePreference } from '../types/I18N';
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import { assertDev } from './assert';
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function getOptionsWithPreferences(
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options: Intl.DateTimeFormatOptions
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): Intl.DateTimeFormatOptions {
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const hourCyclePreference = window.SignalContext.getHourCyclePreference();
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if (options.hour12 != null) {
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return options;
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}
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if (hourCyclePreference === HourCyclePreference.Prefer12) {
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return { ...options, hour12: true };
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}
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if (hourCyclePreference === HourCyclePreference.Prefer24) {
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return { ...options, hour12: false };
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}
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return options;
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}
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/**
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* Chrome doesn't implement hour12 correctly
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*/
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function fixBuggyOptions(
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locales: Array<string>,
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options: Intl.DateTimeFormatOptions
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): Intl.DateTimeFormatOptions {
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const resolvedOptions = new Intl.DateTimeFormat(
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locales,
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options
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).resolvedOptions();
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const resolvedLocale = new Intl.Locale(resolvedOptions.locale);
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let { hourCycle } = resolvedOptions;
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// Most languages should use either h24 or h12
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if (hourCycle === 'h24') {
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hourCycle = 'h23';
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}
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if (hourCycle === 'h11') {
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hourCycle = 'h12';
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}
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// Only Japanese should use h11 when using hour12 time
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if (hourCycle === 'h12' && resolvedLocale.language === 'ja') {
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hourCycle = 'h11';
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}
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return {
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...options,
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hour12: undefined,
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hourCycle,
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};
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}
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function getCacheKey(
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locales: Array<string>,
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options: Intl.DateTimeFormatOptions
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) {
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return `${locales.join(',')}:${Object.keys(options)
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.sort()
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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.map(key => `${key}=${(options as any)[key]}`)
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.join(',')}`;
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}
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const formatterCache = new Map<string, Intl.DateTimeFormat>();
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export function getDateTimeFormatter(
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options: Intl.DateTimeFormatOptions
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): Intl.DateTimeFormat {
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const locales = window.SignalContext.getPreferredSystemLocales();
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const optionsWithPreferences = getOptionsWithPreferences(options);
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const cacheKey = getCacheKey(locales, optionsWithPreferences);
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const cachedFormatter = formatterCache.get(cacheKey);
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if (cachedFormatter) {
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return cachedFormatter;
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}
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const fixedOptions = fixBuggyOptions(locales, optionsWithPreferences);
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const formatter = new Intl.DateTimeFormat(locales, fixedOptions);
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formatterCache.set(cacheKey, formatter);
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return formatter;
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}
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export function formatTimestamp(
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timestamp: number,
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options: Intl.DateTimeFormatOptions
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): string {
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const formatter = getDateTimeFormatter(options);
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try {
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return formatter.format(timestamp);
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} catch (err) {
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assertDev(false, 'invalid timestamp');
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return '';
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}
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}
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