Download all the booty!
当前为
// ==UserScript==
// @name LibreGRAB
// @namespace http://tampermonkey.net/
// @version 2024-06-22
// @description Download all the booty!
// @author HeronErin
// @match *://*.listen.libbyapp.com/*
// @icon https://www.google.com/s2/favicons?sz=64&domain=libbyapp.com
// @require https://cdnjs.cloudflare.com/ajax/libs/jszip/3.7.1/jszip.min.js
// @grant none
// ==/UserScript==
(()=>{
const CSS = `
.pNav{
background-color: red;
width: 100%;
display: flex;
justify-content: space-between;
}
.pLink{
color: blue;
text-decoration-line: underline;
padding: .25em;
font-size: 1em;
}
.foldMenu{
position: absolute;
width: 100%;
height: 0%;
z-index: 1000;
background-color: grey;
overflow-x: hidden;
overflow-y: scroll;
transition: height 0.3s
}
.active{
height: 40%;
border: double;
}
.pChapLabel{
font-size: 2em;
}
`;
const newNav = `
<a class="pLink" id="chap"> <h1> View chapters </h1> </a>
<a class="pLink" id="dow"> <h1> Download chapters </h1> </a>
<a class="pLink" id="exp"> <h1> Export audiobook </h1> </a>
`;
const chaptersMenu = `
<h2>This book contains {CHAPTERS} chapters.</h2>
`;
let chapterMenuElem;
let downloadElem;
function buildPirateUi(){
// Create the nav
let nav = document.createElement("div");
nav.innerHTML = newNav;
nav.querySelector("#chap").onclick = viewChapters;
nav.querySelector("#dow").onclick = downloadChapters;
nav.querySelector("#exp").onclick = exportChapters;
nav.classList.add("pNav");
let pbar = document.querySelector(".nav-progress-bar");
pbar.insertBefore(nav, pbar.children[1]);
// Create the chapters menu
chapterMenuElem = document.createElement("div");
chapterMenuElem.classList.add("foldMenu");
chapterMenuElem.setAttribute("tabindex", "-1"); // Don't mess with tab key
const urls = getUrls();
chapterMenuElem.innerHTML = chaptersMenu.replace("{CHAPTERS}", urls.length);
document.body.appendChild(chapterMenuElem);
for (let url of urls){
let span = document.createElement("span");
span.classList.add("pChapLabel")
span.textContent = "#" + (1 + url.index);
let audio = document.createElement("audio");
audio.setAttribute("controls", "");
let source = document.createElement("source");
source.setAttribute("src", url.url);
source.setAttribute("type", url.type);
audio.appendChild(source);
chapterMenuElem.appendChild(span);
chapterMenuElem.appendChild(document.createElement("br"));
chapterMenuElem.appendChild(audio);
chapterMenuElem.appendChild(document.createElement("br"));
}
downloadElem = document.createElement("div");
downloadElem.classList.add("foldMenu");
document.body.appendChild(downloadElem);
}
function repairSplinePath(s, si){
s = window.origin + "/" + s;
const spline = btoa(JSON.stringify({spine: si}));
const ssplit = s.split("?cmpt=");
return ssplit[0] + "?cmpt=" + spline + "--" + ssplit[1].split("--")[1].substring(0, 40);
}
function getUrls(){
let ret = [];
for (let spine of BIF.map.spine){
let data = {
url: repairSplinePath(spine.path, spine["-odread-spine-position"]),
index : spine["-odread-spine-position"],
duration: spine["audio-duration"],
size: spine["-odread-file-bytes"],
type: spine["media-type"]
};
ret.push(data);
}
return ret;
}
function paddy(num, padlen, padchar) {
var pad_char = typeof padchar !== 'undefined' ? padchar : '0';
var pad = new Array(1 + padlen).join(pad_char);
return (pad + num).slice(-pad.length);
}
function viewChapters(){
// console.log(JSON.stringify(getUrls()));
if (chapterMenuElem.classList.contains("active"))
chapterMenuElem.classList.remove("active")
else
chapterMenuElem.classList.add("active")
}
let downloadState = -1;
async function createAndDownloadZip(urls) {
const zip = new JSZip();
// Fetch all files and add them to the zip
const fetchPromises = urls.map(async (url) => {
const response = await fetch(url.url);
const blob = await response.blob();
const filename = "Chapter " + paddy(url.index + 1, 3) + ".mp3";
let partElem = document.createElement("div");
partElem.textContent = "Download of "+ filename + " complete";
downloadElem.appendChild(partElem);
downloadElem.scrollTo(0, downloadElem.scrollHeight);
downloadState += 1;
zip.file(filename, blob, { compression: "STORE" });
});
// Wait for all files to be fetched and added to the zip
await Promise.all(fetchPromises);
downloadElem.innerHTML += "<br><b>Downloads complete!</b> Now waiting for them to be assembled! (This might take a <b><i>minute</i></b>) <br>";
downloadElem.innerHTML += "Zip progress: <b id='zipProg'>0</b>%";
downloadElem.scrollTo(0, downloadElem.scrollHeight);
// Generate the zip file
const zipBlob = await zip.generateAsync({
type: 'blob',
compression: "STORE",
streamFiles: true,
}, (meta)=>{
if (meta.percent)
downloadElem.querySelector("#zipProg").textContent = meta.percent.toFixed(2);
});
downloadElem.innerHTML += "Generated zip file! <br>"
downloadElem.scrollTo(0, downloadElem.scrollHeight);
// Create a download link for the zip file
const downloadUrl = URL.createObjectURL(zipBlob);
downloadElem.innerHTML += "Generated zip file link! <br>"
downloadElem.scrollTo(0, downloadElem.scrollHeight);
const link = document.createElement('a');
link.href = downloadUrl;
link.download = 'mp3_files.zip';
document.body.appendChild(link);
link.click();
link.remove();
downloadState = -1;
downloadElem.innerHTML = ""
downloadElem.classList.remove("active");
// Clean up the object URL
setTimeout(() => URL.revokeObjectURL(downloadUrl), 100);
}
function downloadChapters(){
if (downloadState != -1)
return;
downloadState = 0;
downloadElem.classList.add("active");
downloadElem.innerHTML = "<b>Starting download</b><br>";
createAndDownloadZip(getUrls()).then((p)=>{});
}
function exportChapters(){
}
// Main entry point for audiobooks
function bifFound(){
// New global style info
let s = document.createElement("style");
s.innerHTML = CSS;
document.head.appendChild(s)
buildPirateUi();
}
// The "BIF" contains all the info we need to download
// stuff, so we wait until the page is loaded, and the
// BIF is present, to inject the pirate menu.
let intr = setInterval(()=>{
if (window.BIF != undefined){
clearInterval(intr);
bifFound();
}
}, 25);
})();