99 lines
2.1 KiB
JavaScript
99 lines
2.1 KiB
JavaScript
const yaml = require('js-yaml');
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const locales = {};
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let fallbackLang = 'en';
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let lang = null;
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/**
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* Class to manage the internationalization.
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*/
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module.exports =
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{
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init() {
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if (lang) return;
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this.loads = {};
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this.locales = locales;
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this.fallbackLang = fallbackLang;
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const languages = navigator.languages;
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if (languages && languages.length > 0)
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lang = languages[0];
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else if (navigator.language)
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lang = navigator.language;
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lang = lang ? lang.substr(0, 2) : fallbackLang;
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this.language = lang;
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},
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async load(path) {
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this.init();
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await Promise.all([
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this.loadLang(path, fallbackLang),
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this.loadLang(path, lang)
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]);
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},
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/**
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* @returns {Promise}
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*/
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async loadLang(path, lang) {
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let langLoad = this.loads[lang];
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if (!langLoad)
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langLoad = this.loads[lang] = {};
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if (langLoad[path])
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return Promise.resolve();
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langLoad[path] = true;
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const langFile = `${path}/locale/${lang}.yml${Vn.getVersion()}`;
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const request = new XMLHttpRequest();
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request.open('get', langFile, true);
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const promise = new Promise((resolve, reject) => {
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request.onreadystatechange =
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() => this.onRequestReady(request, resolve, reject);
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});
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request.send();
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try {
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const translations = await promise;
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this.add(translations, lang);
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} catch(err) {
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langLoad[path] = false;
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//console.warn(err);
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}
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},
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onRequestReady(request, resolve, reject) {
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if (request.readyState != 4)
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return;
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if (request.status < 200 || request.status >= 400)
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return reject(new Error(`HTTP ${request.status}: ${request.statusText}`));
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resolve(yaml.safeLoad(request.responseText));
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},
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add(translations, myLang) {
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if (!translations) return;
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myLang = myLang || lang;
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let langLocales = locales[myLang];
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if (!langLocales)
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langLocales = locales[myLang] = {};
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for (const str in translations)
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langLocales[str] = translations[str];
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}
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}
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function getString(stringId, lang) {
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return locales[lang] ? locales[lang][stringId] : null;
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}
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window._ = function(stringId) {
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let string = getString(stringId, lang);
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if (!string)
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string = getString(stringId, fallbackLang);
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return string || stringId;
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}
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