85 lines
2.0 KiB
JavaScript
85 lines
2.0 KiB
JavaScript
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/**
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* Usage:
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* import i18n from './i18n.js'
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*
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* console.log( i18n('parentcontext.childcontext.key', {user: username}) );
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*
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* language is loaded from cookie: lang=XX
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* translations are loaded from /public/i18n/XX.txt
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*
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*/
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const default_lang = "EN";
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let langs;
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/**
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* Fetch the translation from a key using the current language.
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* could also replace certain value of the form `$variable` by providing an object
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* with { variable: "value" }
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* @param key :string translation key (can be null)
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* @param options: Object element to replace in the translation
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*
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* @return :string The translated text
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*/
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function i18n(key, options) {
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let ret = langs[key];
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if(options != null){
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for (let key in options) {
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ret = ret.replaceAll("$" + key, options[key]);
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}
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}
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return ret;
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}
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async function reloadLang(){
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langs = await loadLangs();
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}
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reloadLang();
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export default i18n;
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//
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// Those functions are utility functions use by previous exported functions.
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//
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/**
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* Return the content of a cookie with specified key
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* @param key cookie name
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*/
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function getCookie(key){
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key = key + "="
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let cookies = decodeURIComponent(document.cookie).split(";");
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for (let el of cookies) {
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el = el.trimStart();
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if(el.indexOf(key) == 0){
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return el.substr(key.length, el.length);
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}
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}
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return "";
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}
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/**
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* Function that load the file with translation from the specified lang and return a dictionnary
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* @param select the language to load. could be null to fetch the cookies for an answer
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* if nothing is found. default to EN.txt
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*/
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async function loadLangs(lang){
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lang = lang != null ? lang : getCookie("lang");
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lang = lang != "" ? lang : default_lang;
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const filename = "./i18n/" + lang.toUpperCase() + ".txt";
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const content = await (await fetch(filename)).text();
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const lines = content.split("\n");
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let filteredLines = {};
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for (let line of lines) {
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if(!line.trim().startsWith("#") && line.trim() != ""){
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let split = line.indexOf("=")
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filteredLines[line.substr(0, split)] = line.substr(split+1, line.length);
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};
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}
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return filteredLines;
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}
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