blocks mp3 Ads on spotify web player (2017)

blockify.js

(function() {
	
	// VARIABLES
	const
		// dom terms
		dom = document,
		query = 'querySelector',
		parent = 'parentNode',
		next = 'nextElementSibling',
		attr = 'getAttribute',
		on = 'addEventListener',
		html = 'innerHTML';
		
		// helpers
		getNextTrack = (active) => {
			if (active !== null) {
				// if there is no next track
				if (active[parent][next] === null) {
					// return the first track
					return active[parent][parent][query](
						'.react-contextmenu-wrapper:first-of-type'	
					);
				} else {
					// return the next track
					return active[parent][next];
				}
			}
		},
		getCurrentTrack = () => dom[query](
			'.now-playing .track-info__name a'
		),
		href = (el) => el[attr]('href'),
		trackName = (el) => el[query]('.track-name')[html],
		message = (delay) => {
			setTimeout(() => {
				// set active track
				activeTrack = dom[query]('li.active');
				
				// set reference to next track
				nextTrack = getNextTrack(activeTrack);
				
				if (activeTrack !== null) {
					console.log(
						'"'+trackName(activeTrack)+'"'+
						" is active and "+
						'"'+trackName(nextTrack)+'"'+
						" is next"
					);
				} else {
					console.warn('Sorry, Ads are only blocked in playlist & album views.');
				}
			}, delay);
		};
	
	let	
		// elements
		nextTrack = null,
		activeTrack = dom[query]('li.active'),
		nowPlaying = null,
		
		// strings
		album = "",
		track = "",
		
		// numbers
		countOfTrackChanges = 0;
	
	// PROGRAM
	
	message(5000);

	// delay 7s
	setTimeout(() => {
		
		// set now playing track
		nowPlaying = getCurrentTrack();
		track = nowPlaying[html];
		
		
		// Listen for changes to track name
		setInterval(() => {
			
			// when track name changes
			if (track !== nowPlaying[html]) {
				track = nowPlaying[html];
				nowPlaying = getCurrentTrack();
				message(7000);
				
				console.log('('+(++countOfTrackChanges)
					+') Detected track change...'
					+' playing "'+track+'"'
				);
				
				// when the album changes
				if (album !== href(nowPlaying)) {
					album = href(nowPlaying);
					console.log(
						"***New album in view ["
						+album+"]***"
					);
				}
				
				// when the album link contains an Ad link
				if (nowPlaying[attr]('href').indexOf("shrt") > -1) {
					console.log('Spotify Ad detected!');
					nextTrack[query]('li .play-pause').click();
					console.log(
						'Skipped to '+
						'"'+trackName(nextTrack)+'"'
					);
					countOfTrackChanges = 0; // reset
				}
			}
			
		}, 300);
		
	}, 7000);

})();