/* Written by Amit Agarwal */
/* web: ctrlq.org          */

function doGet(e) {
  var sourceText = '';
  if (e.parameter.q) {
    sourceText = e.parameter.q;
  }

  var sourceLang = 'auto';
  if (e.parameter.source) {
    sourceLang = e.parameter.source;
  }

  var targetLang = 'ja';
  if (e.parameter.target) {
    targetLang = e.parameter.target;
  }

  /* Option 1 */

  var translatedText = LanguageApp.translate(sourceText, sourceLang, targetLang);

  /* Option 2 */

  var url =
    'https://translate.googleapis.com/translate_a/single?client=gtx&sl=' +
    sourceLang +
    '&tl=' +
    targetLang +
    '&dt=t&q=' +
    encodeURI(sourceText);

  var result = JSON.parse(UrlFetchApp.fetch(url).getContentText());

  translatedText = result[0][0][0];

  var json = {
    sourceText: sourceText,
    translatedText: translatedText,
  };

  // set JSONP callback
  var callback = 'callback';
  if (e.parameter.callback) {
    callback = e.parameter.callback;
  }

  // return JSONP
  return ContentService.createTextOutput(callback + '(' + JSON.stringify(json) + ')').setMimeType(
    ContentService.MimeType.JAVASCRIPT
  );
}