Refactor without promises and less async

.babelrc

@@ -0,0 +1,3 @@
+{
+  "presets": ["env"]
+}

package.json

@@ -19,5 +19,11 @@
   "homepage": "https://github.com/gelito/refactor-test#readme",
   "dependencies": {
     "@google-cloud/translate": "^1.1.0"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.26.0",
+    "babel-core": "^6.26.3",
+    "babel-polyfill": "^6.26.0",
+    "babel-preset-env": "^1.7.0"
   }
 }

src/server.js

@@ -1,16 +1,8 @@
-var translate = require('./translator')
 
-var text = "quiero trabajar con los mejores"
-var targetLang = 'en'
+const translate = require('./translator')
 
-console.log(translate);
+const text = "quiero trabajar con los mejores"
+const targetLang = 'en'
 
-translate.translateText(text, targetLang, function (err, result) {
-
-  if (err) {
-    next(err);
-    return;
-  }
-  console.log(result);
-
-});
+translate.translateText(text, targetLang, (err, result) => 
+  err ? next(err) : console.log(result));

src/translator.js

@@ -1,33 +1,20 @@
 "use strict";
 
-var Translate = require('@google-cloud/translate');
-var async = require('async');
+const Translate = require('@google-cloud/translate');
+const async = require('async');
 
-var TranslateService = {};
-var translate = new Translate({
+const TranslateService = {};
+const translate = new Translate({
   keyFilename: './src/translator.conf.json',
 });
 
-TranslateService.translateText = function (content, targetLang, next) {
-
-  var calls = [];
-
-  calls.push(function (callback) {
-
-    translate
-      .translate( content, targetLang )
-      .then(results => {
-        return callback(null, results[0]);
-      })
-      .catch(err => {
-        console.error('ERROR:', err);
-      });
-  });
-
-  async.waterfall(calls, function (err, response) {
-    if (next) next(err, response);
-  });
+TranslateService.translateText = async (content, targetLang, next) => {  
+  try {
+    const results = await translate.translate(content, targetLang);
+    next(null, results[0]);
+  } catch (err) {
+    console.error('ERROR:', err);
+  }
 };
 
-
-module.exports = TranslateService;
+module.exports = TranslateService;