translate-files-api.js

const translateText = require('./libreTranslateWrapper');
const fs = require('fs-extra');
const projectConstants = require('./constants');
const { languagesToTranscribe, translationLanguages } = projectConstants;

let l = console.log;

if(global.debug === 'false'){
  l = function(){}
}

function getCodeFromLanguageName(languageName){
  return translationLanguages.find(function(filteredLanguage){
    return languageName === filteredLanguage.name;
  }).code
}

/** for translation **/
async function createTranslatedFiles({
  directoryAndFileName,
  language,
}){
  const webVttData = await fs.readFile(`${directoryAndFileName}.vtt`, 'utf-8');

  // copy original as copied
  await fs.copy(`${directoryAndFileName}.vtt`, `${directoryAndFileName}_${language}.vtt`)

  for(const languageToConvertTo of languagesToTranscribe){
    l('languageToConvertTo');
    l(languageToConvertTo);

    l('language');
    l(language);

    try {
      // no need to translate just copy the file
      if(languageToConvertTo !== language){
        // hit LibreTranslate backend
        l(`hitting libretranslate: ${language} -> ${languageToConvertTo}`);

        let translatedText = await translateText({
          sourceLanguage: getCodeFromLanguageName(language), // before these were like 'EN', will full language work?
          targetLanguage: getCodeFromLanguageName(languageToConvertTo),
          text: webVttData,
        })

        // do the regexp here
        translatedText.replace(/^(\d[\d:.]+\d) .*?( \d[\d:.]+\d)$/gm, "$1 -->$2");

        translatedText = 'WEBVTT' + translatedText.slice(6);

        await fs.writeFile(`${directoryAndFileName}_${languageToConvertTo}.vtt`, translatedText, 'utf-8');
      }
    } catch (err){
      l(err);
      l('error in translation');
      return err
    }
  }
}

module.exports = createTranslatedFiles;