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.
 */

const express = require('express');
const NaturalLanguageUnderstandingV1 = require('ibm-watson/natural-language-understanding/v1.js');
const { IamAuthenticator } = require('ibm-watson/auth');

const app = express();
// Create the service wrapper
const nlu = new NaturalLanguageUnderstandingV1({
  version: '2021-10-15',
  authenticator: new IamAuthenticator({
    apikey: process.env.NATURAL_LANGUAGE_UNDERSTANDING_IAM_APIKEY || 'type-key-here',
  }),
  url: process.env.NATURAL_LANGUAGE_UNDERSTANDING_URL,
});

// setup body-parser
const bodyParser = require('body-parser');

app.use(bodyParser.json());

// Bootstrap application settings
require('./config/express')(app);

app.get('/', (req, res) => {
  res.render('index');
});

app.post('/api/analyze', (req, res, next) => {
  if (process.env.SHOW_DUMMY_DATA) {
    res.json(require('./payload.json'));
  } else {
    nlu.analyze(req.body, (err, results) => {
      if (err) {
        return next(err);
      }
      return res.json({ query: req.body.query, results: results.result });
    });
  }
});

// error-handler settings
require('./config/error-handler')(app);

module.exports = app;