A #javascript #userscript: Fix redirect twitter link

README.md

This userscript is an improvment proposition for http://userscripts.org/scripts/show/139503

twitter-redirect-fixer.user.js

// ==UserScript==
// @name           Twitter Redirect-Fixer
// @include        https://*.twitter.com/*
// @include        https://twitter.com/*
// @include        http://*.twitter.com/*
// @include        http://twitter.com/*
// ==/UserScript==
(function() {
	function huntForTweets( event ) {	
		var node = event.target;
		if ( isTweetNode( node ) ) {
			fixTweetLinks( node );
		}
	}

	var isTweetNode = function( node ) {
		// Test1: filtering by element, low cost test
		// Test2: filtering by data-item-type, for tweets added at the bottom of your timeline
		// Test3: filtering by class, for new tweets added at the top of your timeline
		return ( node.tagName == 'DIV' && ( 
			node.getAttribute( 'data-item-type' ) == 'tweet' ||
			node.className.substr( 0, 6 ) == 'tweet '
		) );
	}

	var fixTweetLinks = function( tweetNode ) {
		var links = tweetNode.getElementsByClassName( 'twitter-timeline-link' );
		for ( var i=0; i<links.length; i++ ) {
			links[i].href = getFixedHref( links[i] );
		}
	}

	// Method based on script from http://userscripts.org/scripts/review/117942
	var getFixedHref = function( node ) {	
		var realURL = node.getAttribute('data-ultimate-url');
		/*
			BUGFIX1: Google Groups redirect to main page. (t.co bug probably) More Info: 
					 https://addons.opera.com/en/extensions/details/twitter-redirect-fixer/?reports&display=en#r39265-30425-comment
			
			BUGFIX2: Certain Promoted Tweets with Youtube Links redirect to a page to verify age. The tweet that triggers this bug located at:
					 https://twitter.com/sleepingdogs/status/200315064803270656	
		*/
		if ( ! realURL || realURL.match( /groups\.google\.com/ ) || realURL.match( /youtube\.com/ ) ) {
			realURL = node.getAttribute('data-expanded-url');
		}
		if ( realURL ) {			
			return realURL;
		}
		return node.href;
	};
	
	// Add event when a tweet is added
	document.addEventListener( 'DOMNodeInserted', huntForTweets, false );

	// Parse every tweets links that are already present when the page is loaded
	fixTweetLinks( document );
})();