138 lines
4.3 KiB
JavaScript
138 lines
4.3 KiB
JavaScript
/**
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* @module i18n
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* @copyright 2022, the Converse.js contributors
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* @license Mozilla Public License (MPLv2)
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* @description This is the internationalization module
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*/
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import Jed from 'jed';
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import log from "@converse/headless/log.js";
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import { _converse, api, converse, i18n } from '@converse/headless/core.js';
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const { dayjs } = converse.env;
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function detectLocale (library_check) {
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/* Determine which locale is supported by the user's system as well
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* as by the relevant library (e.g. converse.js or dayjs).
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* @param { Function } library_check - Returns a boolean indicating whether
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* the locale is supported.
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*/
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let locale;
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if (window.navigator.userLanguage) {
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locale = isLocaleAvailable(window.navigator.userLanguage, library_check);
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}
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if (window.navigator.languages && !locale) {
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for (let i=0; i<window.navigator.languages.length && !locale; i++) {
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locale = isLocaleAvailable(window.navigator.languages[i], library_check);
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}
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}
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if (window.navigator.browserLanguage && !locale) {
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locale = isLocaleAvailable(window.navigator.browserLanguage, library_check);
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}
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if (window.navigator.language && !locale) {
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locale = isLocaleAvailable(window.navigator.language, library_check);
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}
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if (window.navigator.systemLanguage && !locale) {
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locale = isLocaleAvailable(window.navigator.systemLanguage, library_check);
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}
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return locale || 'en';
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}
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function isConverseLocale (locale, supported_locales) {
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return typeof locale === 'string' && supported_locales.includes(locale);
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}
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function getLocale (preferred_locale, isSupportedByLibrary) {
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if (typeof preferred_locale === 'string') {
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if (preferred_locale === 'en' || isSupportedByLibrary(preferred_locale)) {
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return preferred_locale;
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}
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}
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return detectLocale(isSupportedByLibrary) || 'en';
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}
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/* Check whether the locale or sub locale (e.g. en-US, en) is supported.
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* @param { String } locale - The locale to check for
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* @param { Function } available - Returns a boolean indicating whether the locale is supported
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*/
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function isLocaleAvailable (locale, available) {
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if (available(locale)) {
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return locale;
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} else {
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var sublocale = locale.split("-")[0];
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if (sublocale !== locale && available(sublocale)) {
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return sublocale;
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}
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}
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}
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function getDayJSLocale (locale) {
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const dayjs_locale = locale.toLowerCase().replace('_', '-');
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return dayjs_locale === 'ug' ? 'ug-cn' : dayjs_locale;
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}
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/* Fetch the translations for the given local at the given URL.
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* @private
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* @method i18n#fetchTranslations
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* @param { _converse }
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*/
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async function fetchTranslations (_converse) {
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const { api, locale } = _converse;
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const dayjs_locale = getDayJSLocale(locale);
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if (!isConverseLocale(locale, api.settings.get("locales")) || locale === 'en') {
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return;
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}
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const { default: data } = await import(/*webpackChunkName: "locales/[request]" */ `../i18n/${locale}/LC_MESSAGES/converse.po`);
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await import(/*webpackChunkName: "locales/dayjs/[request]" */ `dayjs/locale/${dayjs_locale}.js`);
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dayjs.locale(getLocale(dayjs_locale, l => dayjs.locale(l)));
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jed_instance = new Jed(data);
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}
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let jed_instance;
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/**
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* @namespace i18n
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*/
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Object.assign(i18n, {
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getLocale (preferred_locale, available_locales) {
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return getLocale(preferred_locale, preferred => isConverseLocale(preferred, available_locales));
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},
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translate (str) {
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if (!jed_instance) {
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return Jed.sprintf.apply(Jed, arguments);
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}
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const t = jed_instance.translate(str);
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if (arguments.length > 1) {
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return t.fetch.apply(t, [].slice.call(arguments, 1));
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} else {
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return t.fetch();
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}
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},
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async initialize () {
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if (_converse.isTestEnv()) {
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_converse.locale = 'en';
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} else {
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try {
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const preferred_locale = api.settings.get('i18n');
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_converse.locale = i18n.getLocale(preferred_locale, api.settings.get("locales"));
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await fetchTranslations(_converse);
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} catch (e) {
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log.fatal(e.message);
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_converse.locale = 'en';
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}
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}
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},
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__ (...args) {
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return i18n.translate(...args);
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}
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});
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export const __ = i18n.__;
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