index.js

// sentiment analysis

// import used modules
const https = require('https');
const inquirer = require('inquirer');
const readline = require('readline');

let responseString;
let response;
let responseArray;

sentimentAnalisys();

// main function
function sentimentAnalysis() {
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
  });

  rl.question('Which text should I analyze? ', answer => {
    // TODO: Log the answer in a database

    const sendText = JSON.stringify({
      text: answer
    });

    let options = {
      host: 'apidemo.theysay.io',
      path: '/api/v1/sentiment',
      method: 'POST',

      headers: {
        Referer: 'https://apidemo.theysay.io/',
        'Content-Type': 'application/json'
      }
    };

    let req = https.request(options, function(res) {
      responseString = '';

      res.on('data', function(data) {
        responseString += data;
        // save all the data from response
      });
      res.on('end', function() {
        // console.log(responseString);
        // print to console when response ends

        response = responseString;

        // transform string to object using JSON.parse
        // console.log(typeof response);
        responseArray = JSON.parse(response);

        // console.log(responseArray);
        // console.log(typeof responseArray);
        // console.log(responseArray.sentiment.label);

        console.log(`\nI analyzed this text: ` + `"` + answer + `"\n`);
        console.log(
          'Your text is: ' +
            responseArray.sentiment.label +
            '. (I am ' +
            Math.round(responseArray.sentiment.confidence * 100) +
            '% confident.)'
        );
        if (responseArray.sentiment.label === 'POSITIVE') {
          console.log(`Congratulations! I like your positive attitude!`);
        } else if (responseArray.sentiment.label === 'NEGATIVE') {
          console.log(
            `Perhaps you should change your text to be more positive.`
          );
        }

        console.log(
          '\nI am ' +
            Math.round(responseArray.sentiment.confidence * 100) +
            '% confident.'
        );
        repeatFunc();
      });
    });

    req.write(sendText);
    req.end();
    rl.close();

    function repeatFunc() {
      inquirer
        .prompt([
          {
            type: 'list',
            name: 'answer',
            message: '\nDo you want to have another try?',
            choices: ['yes', 'no']
          }
        ])
        .then(answers => {
          console.log('Answer:', answers.answer);
          if (answers.answer === 'yes') {
            sentimentAnalysis();
          }
        });
    }
  });
}