// ==UserScript==
// @name           Amazon short URL
// @namespace      graphen
// @version        4.2.0
// @description    Replace article URL with short Amazon permalink
// @author         Graphen
// @include        /^https?:\/\/www\.amazon\.(cn|in|sg|ae|fr|de|pl|it|nl|es|ca|se|com(\.(mx|au|br|tr|be))?|co\.(uk|jp))\/.*(dp|gp\/(product|video)|exec\/obidos\/ASIN|o\/ASIN)\/.*$/
// @icon           https://www.amazon.com/favicon.ico
// @noframes
// @grant          none
// @license        MIT
// ==/UserScript==
/* jshint esversion: 6 */
(function (doc) {
'use strict';
function getAsin(){
let asinId = doc.getElementById('ASIN');
if (asinId && asinId.value.length === 10) {
return asinId.value;
}
else {
// Get ASIN from canonical link
let links = doc.getElementsByTagName('link');
let i;
for (i=0; i < links.length; i++) {
if (links[i].rel === 'canonical') {
let canonical = links[i].href;
let asin = canonical.replace(/https?:\/\/www\.amazon\..*\/dp\/([\w]+)$/, '$1');
if (asin.length === 10) {
return asin;
}
}
}
}
}
function replaceUrl() {
let asin = getAsin();
if (asin){
history.replaceState(null, 'Amazon URL Cleaner', '/dp/' + asin + '/');
//console.log("URL replaced by Amazon URL Cleaner. ASIN: " + asin);
}
}
replaceUrl();
// Execute again when item variation is selected
var buyboxParent = doc.getElementById('desktop_buybox');
if (buyboxParent) {
var MO = new MutationObserver(function(mutations) {
mutations.forEach(function(mutation) {
mutation.addedNodes.forEach(function(nodeElement) {
if (nodeElement.id === "buybox") {
replaceUrl();
}
});
});
});
MO.observe(buyboxParent, { childList: true, subtree: true });
}
// Clear dynamically added URL parameters
function checkUrlParameters(){
if(window.location.search !== '') {
window.history.replaceState(window.history.state, "", window.location.origin + window.location.pathname);
}
}
setInterval(checkUrlParameters, 1000);
}) (document);