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JavaScript

Filipe Costa
Filipe Costa
10,071 Points
Posted by Filipe Costa
Filipe Costa
10,071 Points

util.inherits() is being discouraged... (solution)

Hi! While going through the profile.js file, in my journey to try to understand how event emitters work, I found out that util.inherits method is being discouraged in favour of ES6 classes and extends syntax. This is my solution to the code:

const Event = require("events");
const https = require("https");
const http = require("http");

/**
 * Custom Event to get a Treehouse students profile
 * @param username
 * @constructor
 */

class Profile extends Event {
    constructor(username) {
     super();
     const profileEmmiter = this;
     //Connect to the API URL (https://teamtreehouse.com/username.json)
     const request = https.get("https://teamtreehouse.com/" + username + ".json", (response) => {
      let body = "";
      if (response.statusCode !== 200) {
       request.abort();
       //Status Code Error
       profileEmmiter.emit("error", new Error("There was an error getting the profile for " + username + ". (" + http.STATUS_CODES[response.statusCode] + ")"));
      }
      //Read the data
      response.on('data', (chunk) => {
       body += chunk;
       profileEmmiter.emit("data", chunk);
      });

      response.on('end', () => {
       if (response.statusCode === 200) {
        try {
         //Parse the data
         const profile = JSON.parse(body);
         profileEmmiter.emit("end", profile);
        } catch (error) {
         profileEmmiter.emit("error", error);
        }
       }
      }).on("error", function(error) {
       profileEmmiter.emit("error", error);
      });
     });
    }
}

module.exports = Profile;

I hope this helps!