firefly-iii/resources/assets/v2/support/load-translations.js

/*
 * load-translations.js
 * Copyright (c) 2023 james@firefly-iii.org
 *
 * This file is part of Firefly III (https://github.com/firefly-iii).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */


import i18next from "i18next";
import ChainedBackend from "i18next-chained-backend";
import HttpBackend from "i18next-http-backend";
import LocalStorageBackend from "i18next-localstorage-backend";




let loaded = false;
let count = 0;

function loadTranslations(locale) {
    if (false === loaded && 0 === count) {
        console.log('Loading translations: ' + count);
        const replacedLocale = locale.replace('-', '_');
        loaded = true;
        count++;

        return i18next
            .use(ChainedBackend)
            .init({
                fallbackLng: "en_US",
                lng: replacedLocale,
                debug: true,
                // ... your i18next config
                backend: {
                    backends: [
                        LocalStorageBackend,
                        HttpBackend
                    ],
                    backendOptions: [{
                        expirationTime: 7 * 24 * 60 * 60 * 1000 // 7 days
                    }, {
                        //         const response = await fetch(`./v2/i18n/${locale}.json`);
                        loadPath: './v2/i18n/{{lng}}.json'
                    }]
                }
            });
    }
    count++;
    console.warn('Loading translations skipped because count is:' + count);
    return Promise.resolve();
}

export {loadTranslations};