// ==UserScript==
// @name        Bilibili Remove Video Tracker
// @namespace   Violentmonkey Scripts
// @match       https://www.bilibili.com/video/*
// @grant       none
// @version     1.1
// @author      yufu
// @description Remove tracker parameter in video link to make a:visited works
// @run-at      document-idle
// @license MIT
// @icon         https://icons.duckduckgo.com/ip3/bilibili.com.ico
// ==/UserScript==
(function() {
'use strict';
let size = 12;
let query = '.info > a';
let counter = 0;
// https://stackoverflow.com/a/16941754
function removeParam(key, sourceURL) {
var rtn = sourceURL.split("?")[0],
param,
params_arr = [],
queryString = (sourceURL.indexOf("?") !== -1) ? sourceURL.split("?")[1] : "";
if (queryString !== "") {
params_arr = queryString.split("&");
for (var i = params_arr.length - 1; i >= 0; i -= 1) {
param = params_arr[i].split("=")[0];
if (param === key) {
params_arr.splice(i, 1);
}
}
if (params_arr.length) rtn = rtn + "?" + params_arr.join("&");
}
return rtn;
}
function doOne(link) {
let url = link.href;
let clean_url = removeParam('spm_id_from',url);
if (url === clean_url) return;
link.href =  clean_url;
}
function doit() {
for (let link of document.querySelectorAll(query)) {
doOne(link);
}
}
// dynamically loaded <a> tag for Autopage
function aObserver() {
const callback = (mutationsList, observer) => {
for (const mutation of mutationsList) {
if (mutation.type === 'attributes' && mutation.attributeName == 'href'){
let target = mutation.target;
console.log(mutation.attributeName, (mutation.attributeName == 'href'));
if (target.tagName === 'A') {
doOne(target);
}
}else {
for (const target of mutation.addedNodes) {
if (target.nodeType != 1) return
if (target.tagName === 'A') {
doOne(target);
} else {
for (let link of document.querySelectorAll(query)) {
doOne(link);
}
break;
}
}
break;
}
}
};
const observer = new MutationObserver(callback);
observer.observe(document, {
childList: true,
subtree: true,
attributes: true,
attributeFilter: ['href']
});
}
doit();
aObserver();
})();