NodeJS CLI tool to create Spotify playlists from given YouTube playlists.

In order to set this application up, you need to set up an API connection to both Spotify and YouTube. This repository contains an access-server which handles the OAuth authentication process for both APIs. First you need to set up an application on both platforms:

• Log in on Spotify Developers and create a new Application.
• Add (http://localhost:80/callback) as redirect URI in the application settings.
• Copy and paste the clientId and clientSecret to a credentialsSpotify.json file. Format should be as below:

{
    "clientId": "<YOUR_CLIENT_ID>",
    "clientSecret": "<YOUR_CLIENT_SECRET>"
}

• Log into the Google Cloud Console and create a new OAuth client ID for your project. Choose Desktop app as application type.
• Download the JSON with the client credentials. Rename it to credentialsYT.json.

• Run npm run server or node src/accessServer. This will run a webserver locally which requests you to sign in with your Spotify/YouTube account. After successfully signing in on both sites, you should see tokensYT.json and tokenSpotify.json file which contains an access_token and a refresh_token. Those are used by the script to access the APIs.

• DO NOT SHARE THOSE TOKEN AND CREDENTIAL FILES WITH ANYONE.

• Note: The access server runs on port 80 because it uses the default redirect uri for the YouTube API. if you want to change that, you also need to set the redirect uris at the Spotify and YouTube application accordingly.

Once set up just run index.js or npm start. The script asks you for a playlist. You can paste the link to the YouTube playlist, or a video playing from that playlist.

This tool uses video title and music metadata tags from YouTube and tries to match it with search results from Spotify. For the most part this performs well, however sometimes special remixes are not properly found and the original (more popular) version gets added to the playlist instead. Sometimes videos on YouTube have neither a title, nor a music metadata added by YouTube. Those can't be matched. Some videos use unicode symbols or emojis in their titles, which the script tries to normalize utilizing a 3rd party library. Video titles not made of latin characters seem to be matched correctly.