s

// The Api module is designed to handle all interactions with the server

var Api = (function() {
  var requestPayload;
  var responsePayload;
  var messageEndpoint = '/api/message';

  // Publicly accessible methods defined
  return {
    sendRequest: sendRequest,

    // The request/response getters/setters are defined here to prevent internal methods
    // from calling the methods without any of the callbacks that are added elsewhere.
    getRequestPayload: function() {
      return requestPayload;
    },
    setRequestPayload: function(newPayloadStr) {
      requestPayload = JSON.parse(newPayloadStr);
    },
    getResponsePayload: function() {
      return responsePayload;
    },
    setResponsePayload: function(newPayloadStr) {
      responsePayload = JSON.parse(newPayloadStr);
    }
  };

  // Send a message request to the server
  function sendRequest(text, context) {
    // Build request payload
    var payloadToWatson = {};
    if (text) {
      payloadToWatson.input = {
        text: text
      };
    }
    if (context) {
      payloadToWatson.context = context;
    }

    // Built http request
    var http = new XMLHttpRequest();
    http.open('POST', messageEndpoint, true);
    http.setRequestHeader('Content-type', 'application/json');
    http.onreadystatechange = function() {
      if (http.readyState === 4 && http.status === 200 && http.responseText) {

        Api.setResponsePayload(http.responseText);
         //alert(http.responseText); <-------- Aqui eu pego a resposta vindo do watson...
          var obj = JSON.parse(http.responseText);
          alert(JSON.stringify(obj["context"]["tutorial"]));
          if(JSON.stringify(obj["context"]["tutorial"]) == JSON.stringify("instalar_impressora"))
          {
              //QUANDO CHEGAR AQUI... É PRA MUDAR A IMG LA........
              //document.getElementById('myImage').src='pic_bulboff.gif
              //$(".conteudo").funcao
              var el = document.getElementById( 'watson-column' );
              alert( el.outerHTML );
          }
          else{
              alert("0");
          }
      }
    };
    var params = JSON.stringify(payloadToWatson);

    // Stored in variable (publicly visible through Api.getRequestPayload)
    // to be used throughout the application
    if (Object.getOwnPropertyNames(payloadToWatson).length !== 0) {
      Api.setRequestPayload(params);
    }

    // Send request
    http.send(params);
  }
}());