genius.js

import http from 'http'; 
import fs from 'fs';
import qs from 'querystring';
import Genius from 'genius-lyrics';
import Mongo from 'mongodb';

const Client = new Genius.Client("o19mtznUl0mu0kk0DZxZgATNB-2Cw0ihj5ybfCdOpd-pz25oY7A4J5BgGQEoqDGb");
const MongoClient = Mongo.MongoClient;
const url = "mongodb+srv://aliulex:aliulex0@cluster0.qxqu8.mongodb.net/myFirstDatabase?retryWrites=true&w=majority"; 

var info;
var query;
var lyrics;

var port = process.env.PORT || 3000;

http.createServer(function (req, res)  
{
    if (req.url == "/") 
	{
        var file = 'index.html';  
  		fs.readFile(file, function(err, txt) 
        {
      	    res.writeHead(200, {'Content-Type': 'text/html'});
            res.write(txt);
            res.end();
  	    });
	}

    else if (req.url == "/lyrics") 
	{
        var file = 'lyrics.html';  
  		fs.readFile(file, function(err, txt) 
        {
      	    res.writeHead(200, {'Content-Type': 'text/html'});
            res.write(txt);
  	    });

        info = "";
        query = "";

	    req.on('data', data => {
        	info += data.toString();
        });

	    req.on('end', async () => {
		    info = qs.parse(info);
	        if (info['song']) 
	        {
	            query = info['song'];
	        }
			
			const searches = await Client.songs.search(query);
			const firstSong = searches[0];
			lyrics = await firstSong.lyrics();
			
			res.write("<h2>Lyrics</h2>");
			res.write(lyrics);

			res.end();
        });
    }
    
    else if (req.url == "/favorites") 
    {
        var file = 'favorites.html';  
  		fs.readFile(file, function(err, txt) 
        {
      	    res.writeHead(200, {'Content-Type': 'text/html'});
            res.write(txt);
  	    });
	    
// 	res.writeHead(200, {'Content-Type': 'text/html'});
        
        MongoClient.connect(url, { useUnifiedTopology: true }, function(err, db) {
            if(err) { return console.log(err); return;}
            
            var dbo = db.db("favorites");
            var collection = dbo.collection('songs');
            var myobj = {song: query};
		
	
            collection.insertOne(myobj, function(err, result) {
                if(err) { console.log("query err: " + err); return; }
                console.log("new document inserted");
            });
            
            collection.find({"song":{$ne:null}}).toArray(function(err, items) {
                res.write("<h2>Your Favorite Songs:</h2>");
                if(items.length == 0) {
                    res.write("No favorites");
                }
// 		else if {
// 			for (let i = 0; i < items.length; i++) {
// 				for (let j = i + 1; j<items.length; j++) {
// 					if (items[i].song == items[j].song) {
// 						dbo.collection('songs').deleteOne(query, function(err, obj) {
//     							if (err) throw err;
//     							console.log(db.result.n + " document(s) deleted");
//     							db.close();
//   	   					 });
// 					}
// 				}
// 			}
// 		}
                else {
                    for (let i=0; i<items.length; i++)
                    {
                            res.write(items[i].song + "<br><br>");
                    }
                    res.end();
                } 
            });
        
        });
    }
}).listen(port);