Link-Cleaner (Greasemonkey / Tampermonkey)

link-cleaner.user.js

// ==UserScript==
// @name				Link-Cleaner
// @namespace		https://www.leonbrandt.com
// @version			1.0
// @description	Press SHIFT + ALT + C to automatically clean Links
// @author			Leon Brandt
// @homepage		https://www.leonbrandt.com
// @updateURL		https://gist.github.com/leonbrandt/3fe02a8aca3929d97c5a840370c4e052/raw/link-cleaner.user.js
// @match			http*://*/*
// @grant			none
// @run-at			document-idle
// ==/UserScript==

/*
	Supports: Amazon, Youtube, IMDb, mobile.de
*/

function trimHost(host) {
	var hostRegex = /(?:[\w-]+)?\.?([\w-]+)\.(?:[\w-]+)/g;
	var match = hostRegex.exec(host);
	return match[1];
}

function remove_all_get_parameters(url) {
	var href = url.href;

	url.search = "";

	if(href === url.href) return null;
	return url;
}

function amazon(url) {
	var href = url.href;

	var dp_detected = false;
	var dp = null;
	url.pathname.split("/").forEach(t => {
		if(dp_detected){
			dp = t;
			dp_detected = false;
		}
		if(t === "dp") dp_detected = true;
	});
	if(dp == null) return null;

	url.search = "";
	url.pathname = "/dp/" + dp;

	if(href === url.href) return null;
	return url;
}

function youtube(url) {
	var href = url.href;
	var v = url.searchParams.get("v");

	url.search = "?v=" + v;

	if(href === url.href) return null;
	return url;
}

function mobile(url) {
	var href = url.href;
	var id = url.searchParams.get("id");

	url.search = "?id=" + id;

	if(href === url.href) return null;
	return url;
}

function detect(url) {
	switch(trimHost(url.host).toLowerCase()){
		case "amazon":
			return amazon(url);
			break;
		case "youtube":
			if(url.pathname.startsWith("/watch")) return youtube(url);
			break;
		case "imdb":
			if(url.pathname.startsWith("/title")) return remove_all_get_parameters(url);
			break;
		case "mobile":
			if(url.pathname.startsWith("/fahrzeuge/details.html")) return mobile(url);
			if(url.pathname.startsWith("/auto-inserat")) return remove_all_get_parameters(url);
			break;
	}
	return null;
}

function run() {
	var target = detect(new URL(window.location.href));
	if(target != null) window.location = target;
}

(function() {
	'use strict';

	document.onkeydown = function(evt){
	evt = evt || window.event;
		if(evt.shiftKey && evt.altKey && evt.keyCode == 67){
				run();
		}
	};

})();