// ==UserScript==
// @name         b站回溯首页推荐换一换
// @namespace    qwq0
// @version      0.4
// @description  b站推荐换一换添加撤回按钮
// @author       qwq0
// @match        https://www.bilibili.com/
// @match        https://www.bilibili.com/?*
// @run-at       document-start
// @icon         https://www.google.com/s2/favicons?sz=64&domain=bilibili.com
// @grant        none
// ==/UserScript==
(async function ()
{
'use strict';
if (location.pathname != "/")
return;
let history = [];
let nowIndex = -1;
let clickdButton = false;
let clickdBacktrackButton = false;
let oldFetch = window.fetch.bind(window);
window.fetch = async (...param) =>
{
if (
(clickdButton || clickdBacktrackButton) &&
typeof (param[0]) == "string" &&
(
param[0].startsWith("https://api.bilibili.com/x/web-interface/wbi/index/top/feed/rcmd") ||
param[0].startsWith("https://api.bilibili.com/x/web-interface/index/top/feed/rcmd") ||
param[0].startsWith("//api.bilibili.com/x/web-interface/wbi/index/top/feed/rcmd") ||
param[0].startsWith("//api.bilibili.com/x/web-interface/index/top/feed/rcmd")
)
)
{
if (clickdButton)
{
clickdButton = false;
if (nowIndex < history.length - 1)
{
nowIndex++;
if (nowIndex >= 1)
backtrackButton.style.display = "block";
return history[nowIndex].clone();
}
else
{
if (nowIndex == -1)
{ // 第一层点击按钮时尝试构造推荐响应
try
{
let feedCardList = document.querySelectorAll("main div.feed-card");
let cardDataList = [];
for (let o of feedCardList)
{
try
{
let link = String(o.querySelectorAll(".bili-video-card__image--link")[0].href);
let title = String(o.querySelectorAll(".bili-video-card__info--tit")[0].innerText);
let cover = String(o.querySelectorAll("img")[0].src);
// let bvInd = link.indexOf("/BV");
// let bvid = link.slice(bvInd + 1);
cardDataList.push({
goto: "av",
// bvid: bvid,
uri: link,
pic: cover,
title: title
});
}
catch (err)
{ }
}
if (cardDataList.length == 0)
throw "Unable to extract element";
let dataObj = {
code: 0,
message: "0",
ttl: 1,
data: {
item: cardDataList
}
};
// console.log("test", dataObj);
let response = new Response(JSON.stringify(dataObj), {});
history.push(response.clone());
nowIndex++;
}
catch (err)
{
console.error("build first rcmd failure:", err);
}
}
/**
* @type {Response}
*/
let response = await oldFetch(...param);
history.push(response.clone());
nowIndex++;
if (nowIndex >= 1)
backtrackButton.style.display = "block";
// console.log(response.clone());
return response;
}
}
else
{
clickdBacktrackButton = false;
nowIndex--;
if (nowIndex < 0)
nowIndex = 0;
if (nowIndex == 0)
backtrackButton.style.display = "none";
return history[nowIndex].clone();
}
}
return oldFetch(...param);
};
function parseHtmlString(htmlString)
{
let wrapper = document.createElement("div");
wrapper.innerHTML = htmlString;
return wrapper.firstChild;
}
let buttonRoll = await new Promise(resolve =>
{
let intervalId = setInterval(() =>
{
let buttonRoll = document.querySelectorAll(".feed-roll-btn")[0];
if (buttonRoll != undefined)
{
resolve(buttonRoll);
clearInterval(intervalId);
}
}, 150);
});
let refreshButton = buttonRoll.children[0];
let backtrackButton = parseHtmlString(`<button style="margin-top: 10px;" class="primary-btn roll-btn"><span>回溯</span></button>`);
buttonRoll.appendChild(backtrackButton);
backtrackButton.style.display = "none";
refreshButton.addEventListener("click", () =>
{
if (!clickdBacktrackButton)
clickdButton = true;
}, true);
backtrackButton.addEventListener("click", () =>
{
clickdBacktrackButton = true;
refreshButton.click();
});
})();