60 lines
2.0 KiB
TypeScript
60 lines
2.0 KiB
TypeScript
/*
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* Detects navigator locale 24h time preference
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* It works by checking whether hour output contains AM ('1 AM' or '01 h')
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* based on the user's preferred language
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* defaults to 'en-US' (12h) if no navigator language is found
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*/
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import { localStorage } from "@calcom/lib/webstorage";
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const is24hLocalstorageKey = "timeOption.is24hClock";
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export enum TimeFormat {
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TWELVE_HOUR = "h:mma",
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TWENTY_FOUR_HOUR = "HH:mm",
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}
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export const setIs24hClockInLocalStorage = (is24h: boolean) =>
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localStorage.setItem(is24hLocalstorageKey, is24h.toString());
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export const getIs24hClockFromLocalStorage = () => {
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const is24hFromLocalstorage = localStorage.getItem(is24hLocalstorageKey);
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if (is24hFromLocalstorage === null) return null;
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return is24hFromLocalstorage === "true";
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};
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export const getTimeFormatStringFromUserTimeFormat = (timeFormat: number | null | undefined) => {
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return timeFormat === 24 ? TimeFormat.TWENTY_FOUR_HOUR : TimeFormat.TWELVE_HOUR;
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};
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/**
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* Retrieves the browsers time format preference, checking local storage first
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* for a user set preference. If no preference is found, it will use the browser
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* locale to determine the time format and store it in local storage.
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*/
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export const isBrowserLocale24h = () => {
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const localStorageTimeFormat = getIs24hClockFromLocalStorage();
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// If time format is already stored in the browser then retrieve and return early
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if (localStorageTimeFormat === true) {
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return true;
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} else if (localStorageTimeFormat === false) {
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return false;
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}
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// Intl.DateTimeFormat with value=undefined uses local browser settings.
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if (!!new Intl.DateTimeFormat(undefined, { hour: "numeric" }).format(0).match(/M/i)) {
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setIs24hClockInLocalStorage(false);
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return false;
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} else {
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setIs24hClockInLocalStorage(true);
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return true;
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}
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};
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/**
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* Returns the time format string based on whether the current set locale is 24h or 12h.
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*/
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export const detectBrowserTimeFormat = isBrowserLocale24h()
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? TimeFormat.TWENTY_FOUR_HOUR
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: TimeFormat.TWELVE_HOUR;
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