wit_to_yandex.js

'use strict';

// Quickstart example
// See https://wit.ai/l5t/Quickstart

// When not cloning the `node-wit` repo, replace the `require` like so:
const Wit = require('node-wit').Wit;
//const Wit = require('../').Wit;
var request = require('request');

const token = "6ST6EYTHPRWF7DGQ5ZQGHIIK63KBAHZX";
const session = 'my-user-session-42';
const context0 = {};

// what is this?
const firstEntityValue = (entities, entity) => {
  const val = entities && entities[entity] &&
    Array.isArray(entities[entity]) &&
    entities[entity].length > 0 &&
    entities[entity][0].value
  ;
  if (!val) {
    return null;
  }
  return typeof val === 'object' ? val.value : val;
};

function yandexSanitizer(input)
{

    var tmp = "";

    Object.getOwnPropertyNames(input).forEach(function(val, idx, array) {
      //console.log(val + ' -> ' + body[val]);
      tmp += input[val];
    });

    tmp.replace('/');
    tmp = tmp.split('}')[0] + '}';

    var res = JSON.parse(tmp);

    return res;
};

// these are the actions, don't totally understand these
const actions = {
  
  say(sessionId, context, message, cb) {
    //console.log(message);
    cb();
  },
  
  merge(sessionId, context, entities, message, cb) {
    // Retrieve the location entity and store it into a context field
    const lang = firstEntityValue(entities, 'language');
    const phrase = firstEntityValue(entities, 'phrase_to_translate');
    if (lang) {
      context.lang = lang;
      context.phrase = phrase;

      console.log(context);
    }
    cb(context);
  },
  
  error(sessionId, context, error) {
    // console.log(" error?? ");
    console.log(error.message);
  },

  ['do_translate'](sessionId, context, cb) {
    // Here should go the api call, e.g.:
    

    // var dataString = "https://translate.yandex.net/api/v1.5/tr.json/translate?"+
    //                  "key=trnsl.1.1.20160531T182702Z.716ab31006556b85.f1843370ddb632510512306b779caa20a45c80c7&text=What%27s+your+name&lang=Danish";

    var dataString = "https://translate.yandex.net/api/v1.5/tr.json/translate?"+
                     "key=trnsl.1.1.20160531T182702Z.716ab31006556b85.f1843370ddb632510512306b779caa20a45c80c7&text=" + encodeURIComponent(context.phrase) + "&lang=" + context.lang;


    request(dataString, function (error, response, body) {

        // console.log("making a request"); 

        //Check for error
        if(error){
            return console.log('Error:', error);
        }

        //Check for right status code
        if(response.statusCode !== 200){
            return console.log('Invalid Status Code Returned:', response.statusCode);
        }

        var ress = yandexSanitizer(body);

        //context.result = 'sunny';
        context.translation_result = ress.text;
        cb(context);

    });
  },
};

const client = new Wit(token, actions);
//client.interactive();

client.runActions(session, 'How do you say what is your name in Spanish?', context0, (e, context1) => {
  if (e) {
    console.log('Oops! Got an error: ' + e);
    return;
  }
  //console.log('The session state is now: ' + JSON.stringify(context1));
});