generate-localizations.js

// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the GNU Affero General Public License v3.0.
// See the LICENCE file in the repository root for full licence text.

'use strict';

const { spawnSync } = require('child_process');
const fs = require('fs');
const glob = require('glob');
const path = require('path');

const buildPath = path.resolve(__dirname, 'resources/assets/build');
const localesPath = path.resolve(buildPath, 'locales');
const messagesPath = path.resolve(buildPath, 'messages.json');

function extractLanguages() {
  console.log('Extracting localizations...');
  const messages = getAllMesssages();

  const languages = new Map();
  for (const key of Object.keys(messages)) {
    const index = key.indexOf('.');
    const language = key.substring(0, index);
    if (!languages.has(language)) {
      languages.set(language, {});
    }
    languages.get(language)[key] = messages[key];
  }

  return languages;
}

function getAllMesssages() {
  const content = fs.readFileSync(messagesPath);

  return JSON.parse(content);
}

function generateTranslations() {
  spawnSync('php', ['artisan', 'lang:js', '--json', messagesPath], { stdio: 'inherit' });
}

function writeTranslations(languages) {
  for (const lang of languages.keys()) {
    const json = languages.get(lang);
    delete json[`${lang}.mail`];
    const jsonString = JSON.stringify(json);
    const filename = path.resolve(localesPath, `${lang}.js`);
    const script = `(function() { 'use strict'; if (window.LangMessages === undefined) window.LangMessages = { messages: {}}; Object.assign(LangMessages, ${jsonString}); })();`;

    fs.writeFileSync(filename, script);
    console.log(`Created: ${filename}`);
  }
}

// Remove previous existing files and ensure directory exists.
glob.sync(path.resolve(localesPath, '*.js')).forEach(fs.unlinkSync);
fs.mkdirSync(localesPath, {recursive: true});

generateTranslations();
writeTranslations(extractLanguages());

// cleanup
fs.unlinkSync(messagesPath);
console.log(`Removed: ${messagesPath}`);