google-translate-po.js

/*
 * Read https://cloud.google.com/translate/docs/quickstart-client-libraries
 * for Google APIs authentication
 *
 * Dependencies: gettext-parser, sleep, @google-cloud/translate
 */


const fs = require('fs')

// npm i gettext-parser
var gettextParser = require("gettext-parser");

// npm i sleep
var sleep = require('sleep');

// Your Google Project Id
const projectId = 'final-tiles-gallery' 

// PO source file
const po_source_path = '/Users/darko/Local Sites/ftgdev/app/public/wp-content/plugins/final-tiles-grid-gallery-lite/languages/final-tiles-grid-gallery-lite-de.po'

// PO backup file
const po_bkp_path = '/Users/darko/Local Sites/ftgdev/app/public/wp-content/plugins/final-tiles-grid-gallery-lite/languages/final-tiles-grid-gallery-lite-bkp-de.po'

// PO destination file
const po_path = '/Users/darko/Local Sites/ftgdev/app/public/wp-content/plugins/final-tiles-grid-gallery-lite/languages/final-tiles-grid-gallery-lite-de.po'

// MO destination file
const mo_path = '/Users/darko/Local Sites/ftgdev/app/public/wp-content/plugins/final-tiles-grid-gallery-lite/languages/final-tiles-grid-gallery-lite-de.mo'

// Target language
const target = 'de';

async function tr(text) {
  // Imports the Google Cloud client library
  const {Translate} = require('@google-cloud/translate');

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

  const [translation] = await translate.translate(text, target);
  
  return translation
}

async function start() {
  var input = require('fs').readFileSync(po_source_path);
  var po = gettextParser.po.parse(input);

  for(let k in po.translations['']) {
    
    if(po.translations[''][k] && 
      po.translations[''][k].msgstr && 
      po.translations[''][k].msgstr[0] == '') {
      
      let translation = await tr(k)
      console.log(k + " => " + translation)
      po.translations[''][k].msgstr[0] = translation
      
      if(! po.translations[''][k].comments)
        po.translations[''][k].comments = {}

      po.translations[''][k].comments.translator = "automatic translation"

      let output_po = gettextParser.po.compile(po);
      fs.writeFileSync(po_bkp_path, output_po);

      // sleep to avoid flooding the Google APIs
      sleep.msleep(500)
    }
  } 
  
  var output = gettextParser.mo.compile(po);
  var output_po = gettextParser.po.compile(po);

  fs.writeFileSync(mo_path, output);
  fs.writeFileSync(po_path, output_po);
}

start()