transfer_playlist.js

// Created by Kevin Thai

// The script will take in a URL of a YouTube playlist and it will save it into
// a Spotify playlist for you. It requires a YouTube playlist (public/unlisted)
// and login information for Spotify (note: that information won't be saved).

// This will take in videos that are in a format that is mostly used for
// YouTube Music. The videos would be from the artist themselves with the
// name of the song as the title of the video.
// Ex.  Title: "Treasure", Channel: "Bruno Mars" or
//      Title: "Treasure", Channel: "Bruno Mars - Topic"

// let playlistName;
// let link;
// let spotifyEmail;
// let spotifyPass;
// let failedTransfers = [];

const reader = require('readline-sync');

/**
 * Gets information from the user and stores it into a dictionary.
 */
function getInformationFromUser() {
    let playlistName = reader.question("Enter a name for the playlist: ");
    let link = reader.question('Enter your YouTube playlist link: ');
    console.log("Please enter your Spotify login. Don't worry, it won't be saved elsewhere.");
    let spotifyEmail = reader.question('Enter your Spotify email/username: ');
    let spotifyPass = reader.question('Enter your Spotify password: ', { hideEchoBack: true});
    let spotifyPassTest;
    spotifyPassTest = reader.question('Re-enter your Spotify password: ', { hideEchoBack: true});
    while(spotifyPass != spotifyPassTest)
    {
        console.log("The passwords are different! Try re-entering again...");
        spotifyPass = reader.question('Enter your Spotify password: ', { hideEchoBack: true});
        spotifyPassTest = reader.question('Re-enter your Spotify password: ', { hideEchoBack: true});
    }
    let spotifyPassEncrypt = "";
    for(index=0; index<spotifyPass.length; index++) {
        spotifyPassEncrypt = spotifyPassEncrypt + "*";
    }

    console.log("Your information: ");
    console.log("[Playlist name]: " + playlistName);
    console.log("[Playlist link]: " + link);
    console.log("[Spotify username/email]: " + spotifyEmail);
    console.log("[Spotify password]: " + spotifyPassEncrypt);

    if(reader.keyInYN("Is the information correct?") == false) { 
        exit()
    }

    return {
        name: playlistName,
        link: link,
        email: spotifyEmail,
        password: spotifyPass
    }
}

const puppeteer = require('puppeteer');
const { userInfo } = require('os');
var listSong = [];
var listChannel = [];
let totalNum;

/** 
 * This function takes in a URL of a YouTube playlist and will save each 
 * individual song and its artist into an array.
 * @param {dictionary} info - information given from the user
*/
async function transferPlaylist(info) {
    ready = false;
    console.log("\n");
    console.log("Opening browser...\n");
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    // Configure the navigation timeout
    await page.setDefaultNavigationTimeout(0);

    // checks the link that user provided
    try {
        if(info.link.includes("https://www.youtube.com") == false) {
            throw new Error("Not valid link.");
        }
        await page.goto(info.link);
    }
    catch (err) {
        console.log("Invalid link. Either have the playlist be public/unlisted");
        console.log("Remember to have the link be like this 'https://www.youtube.com...'");
        return process.exit(1);
    }
        await page.setViewport({
            width: 1200,
            height: 800
        });
        
        await page.evaluate( ()=> {
            window.scrollBy(0,10000);
        });
        await new Promise(r => setTimeout(r, 600));

        console.log("Time to copy info!\n");

    
        // saves the number of videos/songs in the playlist
                                        
        const [el] = await page.$x('/html/body/ytd-app/div[1]/ytd-page-manager/ytd-browse[3]/ytd-playlist-header-renderer/div/div[2]/div[1]/div/div[1]/div[1]/ytd-playlist-byline-renderer/div/yt-formatted-string[1]');
        const txtNumber= await el.getProperty('text');
        let nameNumber = await txtNumber.jsonValue();
        nameNumber = JSON.stringify(nameNumber);
        nameNumber = nameNumber.replace('{"runs":[{"text":"','');
        nameNumber = nameNumber.replace(' videos"}]}', '');
        totalNum = parseInt(nameNumber);

        let indexTotalNum = totalNum;

        // the for-loop saves the title and channel from each song in the playlist
        var index;
        for (index =1; index < indexTotalNum + 1; index++) {            
            // saves the name of the song
            try {
                const[el2] = await page.$x('/html/body/ytd-app/div/ytd-page-manager/ytd-browse/ytd-two-column-browse-results-renderer/div[1]/ytd-section-list-renderer/div[2]/ytd-item-section-renderer/div[3]/ytd-playlist-video-list-renderer/div[3]/ytd-playlist-video-renderer[' + index + ']/div[2]/a/div/h3/span');
                const txtSong = await el2.getProperty('textContent');
                nameSong = await txtSong.jsonValue();
                nameSong = JSON.stringify(nameSong);

                nameSong = nameSong.replace(/\\n/g,'');
                nameSong = nameSong.replace(/  +/g, '').replace(/"+/g,'');
                nameSong = nameSong.replace('Music Video', 'MV').replace('MV', '');
                nameSong = nameSong.replace(/[^ a-zA-Z0-9()]+/g, "").replace(/  +/g, '');
            

                // saves the name of the channel that posted the song (relates to the artist).
                const[el3] = await page.$x('/html/body/ytd-app/div/ytd-page-manager/ytd-browse/ytd-two-column-browse-results-renderer/div[1]/ytd-section-list-renderer/div[2]/ytd-item-section-renderer/div[3]/ytd-playlist-video-list-renderer/div[3]/ytd-playlist-video-renderer[' + index + ']/div[2]/a/div/ytd-video-meta-block/div[1]/div[1]/ytd-channel-name/div/div/yt-formatted-string/a');
                const txtChannel = await el3.getProperty('text');
                let nameChannel = await txtChannel.jsonValue();
                nameChannel = JSON.stringify(nameChannel);
                nameChannel = nameChannel.replace(/"+/g,'').replace(' - Topic', '').replace('OFFICIAL', '').replace('Official','');
                nameChannel = nameChannel.replace("YouTube Channel", '');
                nameChannel = nameChannel.replace("BANGTANTV", "BTS"); // This is a special case for BTS.
                nameChannel = nameChannel.replace(/[^ a-zA-Z0-9()]+/g, "").replace(/  +/g, '');
                if(nameChannel.length == 0 || nameSong.length == 0)
                {
                    continue;
                }
                else 
                {
                    console.log(nameSong, nameChannel);
                    listSong.push(nameSong);
                    listChannel.push(nameChannel);
                }
            }

            // A deleted video has been found.
            catch (err)
            {
                console.log("<Found deleted video..>");
                continue;
            }
        }
    console.log(listSong);
    console.log(listChannel);
    await browser.close();
    await makeSpotifyPlaylist(info);
}

/**
* This function will login with Spotify details and create a new playlist.
* After a new playlist is created, it will save the songs from the YouTube
* playlist into this new playlist on Spotify.
* @param {dictionary} userInfo - information given from the user
*/
async function makeSpotifyPlaylist(userInfo) {
    let numSuccess=0;
    console.log("Now transferring...");
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    await page.setViewport({
        width: 1200,
        height: 800
    });
    // Configure the navigation timeout
    await page.setDefaultNavigationTimeout(0);

    await page.goto('https://accounts.spotify.com/en/login?continue=https:%2F%2Fopen.spotify.com%2F');
    
    // It will input the login details. The program won't save the login details.
    
    const inputUser = await page.$x('/html/body/div[1]/div[2]/div/form/div[1]/div/input');
    await inputUser[0].type(userInfo.email);
    const inputPass = await page.$x('/html/body/div[1]/div[2]/div/form/div[2]/div/input');
    await inputPass[0].type(userInfo.password);

    const buttonLogin = await page.$x('/html/body/div[1]/div[2]/div/form/div[4]/div[2]/button');
    await buttonLogin[0].click();
    await page.waitFor(7000);

    // if can click on this successfully, it has logged in.
    try {
        // This will create a new, empty playlist.
        await page.click('button.fcdf941c8ffa7d0878af0a4f04aa05bb-scss');

    }
    catch(err) {
        browser.close
        console.log("Failed to login Spotify. Invalid username or password.");
        return process.exit(1);
    }

    const inputPlaylistName = await page.$x('/html/body/div[4]/div/div[3]/div/div[1]/div/div/input');
    await inputPlaylistName[0].type(playlistName);

    const buttonCreate = await page.$x('/html/body/div[4]/div/div[3]/div/div[2]/div[2]/button');
    await buttonCreate[0].click();

    const buttonSearch = await page.$x('/html/body/div[4]/div/div[2]/div[2]/nav/ul/li[2]/a');
    await buttonSearch[0].click();

    // This for-loop will search the song in Spotify. Then, it will add it to the playlist.
    let index;
    for (index = 0; index < totalNum; index++) {
        const inputSong = await page.$x('/html/body/div[4]/div/div[2]/div[1]/header/div[3]/div/div/input');

        await page.goto('https://open.spotify.com/search/'+ listSong[index]+ '%20' + listChannel[index]);
        await page.waitFor(3000);

        try {
            const foundSong = await page.$x('/html/body/div[4]/div/div[2]/div[4]/div[1]/div/div[2]/div/div/div[2]/div/div/div/section[2]/div/div[2]/div[1]/div/div/div[3]');
            await foundSong[0].click({button:'right'});
            await page.waitFor(3000);

            const buttonAdd = await page.$x('/html/body/div[4]/div/nav[1]/div[4]');
            await buttonAdd[0].click();
            await page.waitFor(3000);

            const buttonPlaylist = await page.$x('/html/body/div[4]/div/div[3]/div/div[4]/div/div/div[2]/div[1]/div/div/div/div');
            await buttonPlaylist[0].click();
            await page.waitFor(3000);
            console.log("Added " + listSong[index] + ' - ' + listChannel[index]);
            numSuccess += 1;
        }
        catch(err) {
            console.log("Failed to transfer " + listSong[index] + " - " + listChannel[index]);
            failedTransfers.push(listSong[index] + " - " + listChannel[index]);
            continue;            
        }
    }
    await browser.close();

    // display the results
    console.log("Sucessfully added " + numSuccess + "/" + totalNum + " songs!");
    console.log("Failed transfers: ");
    for(index=0; index<failedTransfers.length; index++){
        console.log(failedTransfers[index]);
    }
    return process.exit(0);
}


informationFromUser = getInformationFromUser();
transferPlaylist(informationFromUser);