forked from geolba/tethys.backend
84 lines
2.3 KiB
TypeScript
84 lines
2.3 KiB
TypeScript
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/**
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* Returns the user's locale
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*/
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export function getLocale(): string {
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return document.documentElement.dataset.locale || 'en'
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}
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/**
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* Returns user's locale in canonical form
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* E.g. `en-US` instead of `en_US`
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*/
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export function getCanonicalLocale(): string {
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return getLocale().replace(/_/g, '-')
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}
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/**
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* Returns the user's language
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*/
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export function getLanguage(): string {
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return document.documentElement.lang || 'en'
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}
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/**
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* Check whether the current, or a given, language is read right-to-left
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*
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* @param language Language code to check, defaults to current language
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*/
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export function isRTL(language?: string): boolean {
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const languageCode = language || getLanguage()
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// Source: https://meta.wikimedia.org/wiki/Template:List_of_language_names_ordered_by_code
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const rtlLanguages = [
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/* eslint-disable no-multi-spaces */
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'ae', // Avestan
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'ar', // 'العربية', Arabic
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'arc', // Aramaic
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'arz', // 'مصرى', Egyptian
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'bcc', // 'بلوچی مکرانی', Southern Balochi
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'bqi', // 'بختياري', Bakthiari
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'ckb', // 'Soranî / کوردی', Sorani
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'dv', // Dhivehi
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'fa', // 'فارسی', Persian
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'glk', // 'گیلکی', Gilaki
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'ha', // 'هَوُسَ', Hausa
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'he', // 'עברית', Hebrew
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'khw', // 'کھوار', Khowar
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'ks', // 'कॉशुर / کٲشُر', Kashmiri
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'ku', // 'Kurdî / كوردی', Kurdish
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'mzn', // 'مازِرونی', Mazanderani
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'nqo', // 'ߒߞߏ', N’Ko
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'pnb', // 'پنجابی', Western Punjabi
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'ps', // 'پښتو', Pashto,
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'sd', // 'سنڌي', Sindhi
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'ug', // 'Uyghurche / ئۇيغۇرچە', Uyghur
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'ur', // 'اردو', Urdu
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'uzs', // 'اوزبیکی', Uzbek Afghan
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'yi', // 'ייִדיש', Yiddish
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/* eslint-enable no-multi-spaces */
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]
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// special case for Uzbek Afghan
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if ((language || getCanonicalLocale()).startsWith('uz-AF')) {
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return true
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}
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return rtlLanguages.includes(languageCode)
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}
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export function getBrowserLocale(options?: { languageCodeOnly: boolean }): string {
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const navigatorLocale = navigator.languages !== undefined
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? navigator.languages[0]
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: navigator.language;
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if (!navigatorLocale) {
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return 'en'; // Fallback to 'en' if no locale is detected
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}
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const locale = options?.languageCodeOnly
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? navigatorLocale.trim().split(/-|_/)[0]
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: navigatorLocale.trim();
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return locale;
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}
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