app.js

/**
 * Copyright 2015 IBM Corp. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

'use strict';

var express = require('express'); // app server
var bodyParser = require('body-parser'); // parser for post requests
var Conversation = require('watson-developer-cloud/conversation/v1'); // watson sdk
var fs = require('fs');
var http = require('http');
var https = require('https');
var privateKey  = fs.readFileSync('./newkey.pem', 'utf8');
var certificate = fs.readFileSync('./newcert.pem', 'utf8');
var credentials = {key: privateKey, cert: certificate};
var cors = require('cors')

var app = express();


// Bootstrap application settings
app.use(express.static('./public')); // load UI from public folder
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: true }));
app.use(cors());
app.use(function (req, res, next) {
    res.setHeader('Access-Control-Allow-Origin', '*');
    res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
    res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
    next();
});

var httpServer = http.createServer(app);
var httpsServer = https.createServer(credentials, app);

httpServer.listen(8080);
httpsServer.listen(443);
// Create the service wrapper
var conversation = new Conversation({
  // If unspecified here, the CONVERSATION_USERNAME and CONVERSATION_PASSWORD env properties will be checked
  // After that, the SDK will fall back to the bluemix-provided VCAP_SERVICES environment property
  // username: '<username>',
  // password: '<password>',
  // url: 'https://gateway.watsonplatform.net/conversation/api',
  version_date: Conversation.VERSION_DATE_2017_04_21
});

// Endpoint to be call from the client side
app.post('/api/message', function(req, res) {
  var workspace = process.env.WORKSPACE_ID || '<workspace-id>';
  if (!workspace || workspace === '<workspace-id>') {
    return res.json({
      'output': {
        'text': 'The app has not been configured with a <b>WORKSPACE_ID</b> environment variable. Please refer to the ' + '<a href="https://github.com/watson-developer-cloud/conversation-simple">README</a> documentation on how to set this variable. <br>' + 'Once a workspace has been defined the intents may be imported from ' + '<a href="https://github.com/watson-developer-cloud/conversation-simple/blob/master/training/car_workspace.json">here</a> in order to get a working application.'
      }
    });
  }
  var payload = {
    workspace_id: workspace,
    context: req.body.context || {},
    input: req.body.input || {}
  };

  // Send the input to the conversation service
  conversation.message(payload, function(err, data) {
    if (err) {
      return res.status(err.code || 500).json(err);
    }
    return res.header("Access-Control-Allow-Origin", "*")
            .header("Access-Control-Allow-Headers", "X-Requested-With")
            .json(updateMessage(payload, data));
  });
});

app.post('/ps', function(req, res) {
    const shell = require('node-powershell');

    if(req.body.name && req.body.cpf){
        let ps = new shell({
            executionPolicy: 'Bypass',
            noProfile: true
        });

        ps.addCommand('exec/helloworld.ps1 ' + req.body.name + ' ' + req.body.cpf)
        ps.invoke()
            .then(output => {
                res.send(output);
            })
            .catch(err => {
                res.send(err);
                ps.dispose();
            });
    } else {
        res.send("Parameter 'name' and/or 'cpf' not found.");
    }
});

app.post('/sh', function(req, res) {
    const shell = require('child_process');
    if(req.body.name){
        shell.exec('sh exec/helloworld.sh ' + req.body.name, {silent: true}, function(code, stdout, stderr) {
            res.send(stdout);
        });
    } else {
        res.send("Parameter 'name' not found.");
    }
});

/**
 * Updates the response text using the intent confidence
 * @param  {Object} input The request to the Conversation service
 * @param  {Object} response The response from the Conversation service
 * @return {Object}          The response with the updated message
 */
function updateMessage(input, response) {
  var responseText = null;
  if (!response.output) {
    response.output = {};
  } else {
    return response;
  }
  if (response.intents && response.intents[0]) {
    var intent = response.intents[0];
    // Depending on the confidence of the response the app can return different messages.
    // The confidence will vary depending on how well the system is trained. The service will always try to assign
    // a class/intent to the input. If the confidence is low, then it suggests the service is unsure of the
    // user's intent . In these cases it is usually best to return a disambiguation message
    // ('I did not understand your intent, please rephrase your question', etc..)
    if (intent.confidence >= 0.75) {
      responseText = 'I understood your intent was ' + intent.intent;
    } else if (intent.confidence >= 0.5) {
      responseText = 'I think your intent was ' + intent.intent;
    } else {
      responseText = 'I did not understand your intent';
    }
  }
  response.output.text = responseText;
  return response;
}

module.exports = app;