Copy SoundCloud playlist items from one to another.

soundCloudPlaylist.js

// Configuration
const WAIT_OPEN_PLAYLIST_POPUP = 1000;
const WAIT_AFTER_ADD_PLAYLIST = 1500;

const TARGET_PLAYLIST_NAME = 'To Do';

// Should the new playlist be in reverse order?
const REVERSE = false;
// Should liked items be skipped?
const SKIP_LIKED = true;


// Implementation
const delta = REVERSE ? -1 : 1;
const nextIndex = (index) => index + delta;

const listItems = Array.from(document.querySelectorAll('.sc-button-group.sc-button-group-small'));

const addItemToPlaylist = (index) => {
    const node = listItems[index];

    if (!node) {
        console.log('Done with all currently loaded items.');
        return;
    }

    if (SKIP_LIKED) {
        const hasLikedButton = node.querySelector('.sc-button-like.sc-button-selected');

        if (hasLikedButton) {
            console.log('Already liked index: ', index);

            setTimeout(() => {
                addItemToPlaylist(nextIndex(index));
            }, 0);

            return;
        }
    }

    node.querySelector('.sc-button-more').click();
    document.querySelector('button.sc-button-addtoset').click();

    setTimeout(() => {
        const playlistRow = Array.from(document.querySelectorAll('.addToPlaylistList__item')).find(node => node.querySelector(`[title="${TARGET_PLAYLIST_NAME}"]`));
        const playListButton = playlistRow.querySelector('button.addToPlaylistButton:not(.sc-button-selected)');
    
        if (!playListButton) {
            console.log('Already added index: ', index);
    
            setTimeout(() => {
                addItemToPlaylist(nextIndex(index));
            }, 0);
    
            return;
        }
    
        playListButton.click();
        console.log('Added index: ', index);
    
        setTimeout(() => {
            addItemToPlaylist(nextIndex(index));
        }, WAIT_AFTER_ADD_PLAYLIST);
    }, WAIT_OPEN_PLAYLIST_POPUP);
};

if (REVERSE) {
    addItemToPlaylist(listItems.length - 1);
} else {
    addItemToPlaylist(0);
}

@samhangster The error is thrown on line 46, but actually originates on line 45:

const playlistRow = Array.from(document.querySelectorAll('.addToPlaylistList__item')).find(node => node.querySelector(`[title="${TARGET_PLAYLIST_NAME}"]`));

It seems that the script is unable to locate a node in the DOM tree that has the correct title associated with it. This is most likely a typo in the TARGET_PLAYLIST_NAME variable, or it's possible that you have a lot of playlists and your target playlist is not on the first 'page' that is loaded. That would require some way to work around that using the filter I think.

On second read of your comment, I noticed that you said you clicked something yourself:

The add to playlist pop up comes up, I select my playlist that I typed in the TARGET_PLAYLIST_NAME slot, and it gets stuck there.

This might throw the script off as it was designed to run without intervention. It's all a bit rickety due to all the timeouts, so tiny adjustments can easily break the entire thing.

@Thomasvdam
I got it. I had changed the delays to a lower value thinking it would speed it up or something and it wasn't allowing time for it to even read the playlist name. Thank you for your help!

You are an actual god

thank you from the bottom of my heart

With these few changes got it to work.

const WAIT_OPEN_PLAYLIST_POPUP = 1500; // Increased the wait time
const WAIT_AFTER_ADD_PLAYLIST = 2000; // Increased the wait time

const TARGET_PLAYLIST_NAME = 'my playlist'; // Changed name to an already saved playlist