Filter Facebook ticker stories with a RegEx

facebook-ticker.js

(function() {

	var filterName = new RegExp(prompt("Insert the regex"), 'i');
	if (!filterName) {
		return alert('Invalid regex');
	}

	var MAX_ITERATIONS = 500;

	var $profileNode = document.querySelector('[data-testid="blue_bar_profile_link"] > span');
	var yourName = $profileNode.innerText;

	var $ts = document.querySelector('.ticker_stream');
	var $tsw = $ts.parentNode.parentNode.parentNode;

	var i = 0;

	function hideUselessStories() {
		var els = [].slice.call( document.querySelectorAll('.fbFeedTickerStory') );
		els.forEach(function(e) {
			try {
				var name = e.querySelector('.tickerFeedMessage .fwb').innerText;
				if (filterName.test(name)) e.className += ' fbFeedTickerStoryShow';
			} catch (ex) {
				console.error(ex);
			}
		});

		var st = document.createElement('style');
		st.innerHTML = '.fbFeedTickerStory { display: none !important; } .fbFeedTickerStory.fbFeedTickerStoryShow { display: block !important; }';
		document.body.appendChild(st);
	}

	function scrollTicker() {
		$profileNode.innerText = yourName + ' (' + Math.floor( 100 * i / MAX_ITERATIONS ) + '%)';

		if (i++ > MAX_ITERATIONS) {
			$profileNode.innerText = yourName;
			return hideUselessStories();
		}

		$tsw.scrollTop = $ts.clientHeight;
		setTimeout(scrollTicker, 250);
	}

	scrollTicker();

})();