check_translations.js.example

#!/usr/bin/env node
const fs = require('fs');
const _ = require('lodash');
const path = require('path');

const projectId = 'focal-welder-174713';

// Imports the Google Cloud client library
const { Translate } = require('@google-cloud/translate').v2;

// Instantiates a client
const translate = new Translate({ projectId });

//Args
const destinationLanguages = ['ru', 'cn'];
const languageGoogleAPICodes = { ru: 'ru', cn: 'zh-CN' };
const languageNamesMap = { ru: 'Russian', cn: 'Chinese' };

async function translateMissingValues(originLanguage, targetLanguage, languageKey) {
    if (_.isObject(originLanguage)) {
        await Promise.all(
            Object.keys(originLanguage).map(async (key) => {
                if (_.isObject(originLanguage[key])) {
                    if (!targetLanguage[key]) {
                        targetLanguage[key] = {};
                    }
                    await translateMissingValues(originLanguage[key], targetLanguage[key], languageKey);
                } else if (!targetLanguage[key]) {
                    console.log(`Translating '${originLanguage[key]}' to ${languageNamesMap[languageKey]}`);
                    targetLanguage[key] = (
                        await translate.translate(originLanguage[key], languageGoogleAPICodes[languageKey])
                    )[0];
                }
            })
        );
    }
}

destinationLanguages.forEach((languageKey) => {
    const fileName = `src/i18n/${languageKey}.json`;
    const originLanguage = JSON.parse(fs.readFileSync(path.resolve(`src/i18n/en.json`), 'utf-8'));
    const targetLanguage = JSON.parse(fs.readFileSync(path.resolve(`src/i18n/${languageKey}.json`), 'utf-8'));
    translateMissingValues(originLanguage, targetLanguage, languageKey).then(() => {
        fs.writeFileSync(fileName, JSON.stringify(targetLanguage, null, 4));
    });
});