Download all the booty!
// ==UserScript==
// @name LibreGRAB
// @namespace http://tampermonkey.net/
// @version 2025-03-27
// @description Download all the booty!
// @author PsychedelicPalimpsest
// @license MIT
// @supportURL https://github.com/PsychedelicPalimpsest/LibbyRip/issues
// @match *://*.listen.libbyapp.com/*
// @match *://*.listen.overdrive.com/*
// @match *://*.read.libbyapp.com/?*
// @match *://*.read.overdrive.com/?*
// @run-at document-start
// @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==
(()=>{
// Since the ffmpeg.js file is 50mb, it slows the page down too much
// to be in a "require" attribute, so we load it in async
function addFFmpegJs(){
let scriptTag = document.createElement("script");
scriptTag.setAttribute("type", "text/javascript");
scriptTag.setAttribute("src", "https://github.com/PsychedelicPalimpsest/FFmpeg-js/releases/download/14/0.12.5.bundle.js");
document.body.appendChild(scriptTag);
return new Promise(accept =>{
let i = setInterval(()=>{
if (window.createFFmpeg){
clearInterval(i);
accept(window.createFFmpeg);
}
}, 50)
});
}
let downloadElem;
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;
color: white;
overflow-x: hidden;
overflow-y: scroll;
transition: height 0.3s
}
.active{
height: 40%;
border: double;
}
.pChapLabel{
font-size: 2em;
}`;
/* =========================================
BEGIN AUDIOBOOK SECTION!
=========================================
*/
// Libby, somewhere, gets the crypto stuff we need for mp3 urls, then removes it before adding it to the BIF.
// here, we simply hook json parse to get it for us!
const old_parse = JSON.parse;
let odreadCmptParams = null;
JSON.parse = function(...args){
let ret = old_parse(...args);
if (typeof(ret) == "object" && ret["b"] != undefined && ret["b"]["-odread-cmpt-params"] != undefined){
odreadCmptParams = Array.from(ret["b"]["-odread-cmpt-params"]);
}
return ret;
}
const audioBookNav = `
<a class="pLink" id="chap"> <h1> View chapters </h1> </a>
<a class="pLink" id="down"> <h1> Export as MP3 </h1> </a>
<a class="pLink" id="exp"> <h1> Export audiobook </h1> </a>
`;
const chaptersMenu = `
<h2>This book contains {CHAPTERS} chapters.</h2>
<button class="shibui-button" style="background-color: white" id="dumpAll"> Download all </button><br>
`;
let chapterMenuElem;
function buildPirateUi(){
// Create the nav
let nav = document.createElement("div");
nav.innerHTML = audioBookNav;
nav.querySelector("#chap").onclick = viewChapters;
nav.querySelector("#down").onclick = exportMP3;
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);
downloadElem = document.createElement("div");
downloadElem.classList.add("foldMenu");
downloadElem.setAttribute("tabindex", "-1"); // Don't mess with tab key
document.body.appendChild(downloadElem);
}
function getUrls(){
let ret = [];
for (let spine of BIF.objects.spool.components){
let data = {
url: location.origin + "/" + spine.meta.path + "?" + odreadCmptParams[spine.spinePosition],
index : spine.meta["-odread-spine-position"],
duration: spine.meta["audio-duration"],
size: spine.meta["-odread-file-bytes"],
type: spine.meta["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);
}
let firstChapClick = true;
function viewChapters(){
// Populate chapters ONLY after first viewing
if (firstChapClick){
firstChapClick = false;
for (let url of getUrls()){
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"));
}
}
if (chapterMenuElem.classList.contains("active"))
chapterMenuElem.classList.remove("active");
else
chapterMenuElem.classList.add("active");
chapterMenuElem.querySelector("#dumpAll").onclick = async function(){
chapterMenuElem.querySelector("#dumpAll").style.display = "none";
await Promise.all(getUrls().map(async function(url){
const res = await fetch(url.url);
const blob = await res.blob();
const link = document.createElement('a');
link.href = URL.createObjectURL(blob);
link.download = `${getAuthorString()} - ${BIF.map.title.main}.${url.index}.mp3`;
link.click();
URL.revokeObjectURL(link.href);
}));
chapterMenuElem.querySelector("#dumpAll").style.display = "";
};
}
function getAuthorString(){
return BIF.map.creator.filter(creator => creator.role === 'author').map(creator => creator.name).join(", ");
}
function getMetadata(){
let spineToIndex = BIF.map.spine.map((x)=>x["-odread-original-path"]);
let metadata = {
title: BIF.map.title.main,
description: BIF.map.description,
coverUrl: BIF.root.querySelector("image").getAttribute("href"),
creator: BIF.map.creator,
spine: BIF.map.spine.map((x)=>{return {
duration: x["audio-duration"],
type: x["media-type"],
bitrate: x["audio-bitrate"],
}})
};
if (BIF.map.nav.toc != undefined){
metadata.chapters = BIF.map.nav.toc.map((rChap)=>{
return {
title: rChap.title,
spine: spineToIndex.indexOf(rChap.path.split("#")[0]),
offset: 1*(rChap.path.split("#")[1] | 0)
};
});
}
return metadata;
}
async function createMetadata(zip){
let folder = zip.folder("metadata");
let metadata = getMetadata();
const response = await fetch(metadata.coverUrl);
const blob = await response.blob();
const csplit = metadata.coverUrl.split(".");
folder.file("cover." + csplit[csplit.length-1], blob, { compression: "STORE" });
folder.file("metadata.json", JSON.stringify(metadata, null, 2));
}
function generateTOCFFmpeg(metadata){
if (!metadata.chapters) return null;
let lastTitle = null;
const duration = Math.round(BIF.map.spine.map((x)=>x["audio-duration"]).reduce((acc, val) => acc + val)) * 1000000000;
let toc = ";FFMETADATA1\n\n";
// Get the offset for each spine element
let temp = 0;
const spineSpecificOffset = BIF.map.spine.map((x)=>{
let old = temp;
temp += x["audio-duration"]*1;
return old;
});
// Libby chapter split over many mp3s have duplicate chapters, so we must filter them
// then convert them to be in [title, start_in_nanosecs]
let chapters = metadata.chapters.filter((x)=>{
let ret = x.title !== lastTitle;
lastTitle = x.title;
return ret;
}).map((x)=>[
// Escape the title
x.title.replaceAll("\\", "\\\\").replaceAll("#", "\\#").replaceAll(";", "\\;").replaceAll("=", "\\=").replaceAll("\n", ""),
// Calculate absolute offset in nanoseconds
Math.round(spineSpecificOffset[x.spine] + x.offset) * 1000000000
]);
// Transform chapter to be [title, start_in_nanosecs, end_in_nanosecounds]
let last = duration;
for (let i = chapters.length - 1; -1 != i; i--){
chapters[i].push(last);
last = chapters[i][1];
}
chapters.forEach((x)=>{
toc += "[CHAPTER]\n";
toc += `START=${x[1]}\n`;
toc += `END=${x[2]}\n`;
toc += `title=${x[0]}\n`;
});
return toc;
}
let downloadState = -1;
let ffmpeg = null;
async function createAndDownloadMp3(urls){
if (!window.createFFmpeg){
downloadElem.innerHTML += "Downloading FFmpeg.wasm (~50mb) <br>";
await addFFmpegJs();
downloadElem.innerHTML += "Completed FFmpeg.wasm download <br>";
}
if (!ffmpeg){
downloadElem.innerHTML += "Initializing FFmpeg.wasm <br>";
ffmpeg = await window.createFFmpeg();
downloadElem.innerHTML += "FFmpeg.wasm initalized <br>";
}
let metadata = getMetadata();
downloadElem.innerHTML += "Downloading mp3 files <br>";
await ffmpeg.writeFile("chapters.txt", generateTOCFFmpeg(metadata));
let fetchPromises = urls.map(async (url) => {
// Download the mp3
const response = await fetch(url.url);
const blob = await response.blob();
// Dump it into ffmpeg (We do the request here as not to bog down the worker thread)
const blob_url = URL.createObjectURL(blob);
await ffmpeg.writeFileFromUrl((url.index + 1) + ".mp3", blob_url);
URL.revokeObjectURL(blob_url);
downloadElem.innerHTML += `Download of disk ${url.index + 1} complete! <br>`
downloadElem.scrollTo(0, downloadElem.scrollHeight);
});
let coverName = null;
if (metadata.coverUrl){
console.log(metadata.coverUrl);
const csplit = metadata.coverUrl.split(".");
const response = await fetch(metadata.coverUrl);
const blob = await response.blob();
coverName = "cover." + csplit[csplit.length-1];
const blob_url = URL.createObjectURL(blob);
await ffmpeg.writeFileFromUrl(coverName, blob_url);
URL.revokeObjectURL(blob_url);
}
await Promise.all(fetchPromises);
downloadElem.innerHTML += `<br><b>Downloads complete!</b> Now combining them together! (This might take a <b><i>minute</i></b>) <br> Transcode progress: <span id="mp3Progress">0</span> hours in to audiobook<br>`
downloadElem.scrollTo(0, downloadElem.scrollHeight);
let files = "";
for (let i = 0; i < urls.length; i++){
files += `file '${i+1}.mp3'\n`
}
await ffmpeg.writeFile("files.txt", files);
ffmpeg.setProgress((progress)=>{
// The progress.time feature seems to be in micro secounds
downloadElem.querySelector("#mp3Progress").textContent = (progress.time / 1000000 / 3600).toFixed(2);
});
ffmpeg.setLogger(console.log);
await ffmpeg.exec([
"-y", "-f", "concat",
"-i", "files.txt",
"-i", "chapters.txt"]
.concat(coverName ? ["-i", coverName] : [])
.concat([
"-map_metadata", "1",
"-codec", "copy",
"-map", "0:a",
"-metadata", `title=${metadata.title}`,
"-metadata", `album=${metadata.title}`,
"-metadata", `artist=${getAuthorString()}`,
"-metadata", `encoded_by=LibbyRip/LibreGRAB`,
"-c:a", "copy"])
.concat(coverName ? [
"-map", "2:v",
"-metadata:s:v", "title=Album cover",
"-metadata:s:v", "comment=Cover (front)"]
: [])
.concat(["out.mp3"]));
let blob_url = await ffmpeg.readFileToUrl("out.mp3");
const link = document.createElement('a');
link.href = blob_url;
link.download = getAuthorString() + ' - ' + BIF.map.title.main + '.mp3';
document.body.appendChild(link);
link.click();
link.remove();
downloadState = -1;
downloadElem.innerHTML = ""
downloadElem.classList.remove("active");
// Clean up the object URL
setTimeout(() => URL.revokeObjectURL(blob_url), 100);
}
function exportMP3(){
if (downloadState != -1)
return;
downloadState = 0;
downloadElem.classList.add("active");
downloadElem.innerHTML = "<b>Starting MP3</b><br>";
createAndDownloadMp3(getUrls()).then((p)=>{});
}
async function createAndDownloadZip(urls, addMeta) {
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 = "Part " + 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" });
});
if (addMeta)
fetchPromises.push(createMetadata(zip));
// 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 = getAuthorString() + ' - ' + BIF.map.title.main + '.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 exportChapters(){
if (downloadState != -1)
return;
downloadState = 0;
downloadElem.classList.add("active");
downloadElem.innerHTML = "<b>Starting export</b><br>";
createAndDownloadZip(getUrls(), true).then((p)=>{});
}
// Main entry point for audiobooks
function bifFoundAudiobook(){
// New global style info
let s = document.createElement("style");
s.innerHTML = CSS;
document.head.appendChild(s)
if (odreadCmptParams == null){
alert("odreadCmptParams not set, so cannot resolve book urls! Please try refreshing.")
return;
}
buildPirateUi();
}
/* =========================================
END AUDIOBOOK SECTION!
=========================================
*/
/* =========================================
BEGIN BOOK SECTION!
=========================================
*/
const bookNav = `
<div style="text-align: center; width: 100%;">
<a class="pLink" id="download"> <h1> Download EPUB </h1> </a>
</div>
`;
window.pages = {};
// Libby used the bind method as a way to "safely" expose
// the decryption module. THIS IS THEIR DOWNFALL.
// As we can hook bind, allowing us to obtain the
// decryption function
const originalBind = Function.prototype.bind;
Function.prototype.bind = function(...args) {
const boundFn = originalBind.apply(this, args);
boundFn.__boundArgs = args.slice(1); // Store bound arguments (excluding `this`)
return boundFn;
};
async function waitForChapters(callback){
let components = getBookComponents();
// Force all the chapters to load in.
components.forEach(page =>{
if (undefined != window.pages[page.id]) return;
page._loadContent({callback: ()=>{}})
});
// But its not instant, so we need to wait until they are all set (see: bifFound())
while (components.filter((page)=>undefined==window.pages[page.id]).length){
await new Promise(r => setTimeout(r, 100));
callback();
console.log(components.filter((page)=>undefined==window.pages[page.id]).length);
}
}
function getBookComponents(){
return BIF.objects.reader._.context.spine._.components.filter(p => "hidden" != (p.block || {}).behavior)
}
function truncate(path){
return path.substring(path.lastIndexOf('/') + 1);
}
function goOneLevelUp(url) {
let u = new URL(url);
if (u.pathname === "/") return url; // Already at root
u.pathname = u.pathname.replace(/\/[^/]*\/?$/, "/");
return u.toString();
}
function getFilenameFromURL(url) {
const parsedUrl = new URL(url);
const pathname = parsedUrl.pathname;
return pathname.substring(pathname.lastIndexOf('/') + 1);
}
async function createContent(oebps, imgAssests){
let cssRegistry = {};
let components = getBookComponents();
let totComp = components.length;
downloadElem.innerHTML += `Gathering chapters <span id="chapAcc"> 0/${totComp} </span><br>`
downloadElem.scrollTo(0, downloadElem.scrollHeight);
let gc = 0;
await waitForChapters(()=>{
gc+=1;
downloadElem.querySelector("span#chapAcc").innerHTML = ` ${components.filter((page)=>undefined!=window.pages[page.id]).length}/${totComp}`;
});
downloadElem.innerHTML += `Chapter gathering complete<br>`
downloadElem.scrollTo(0, downloadElem.scrollHeight);
let idToIfram = {};
let idToMetaId = {};
components.forEach(c=>{
// Nothing that can be done here...
if (c.sheetBox.querySelector("iframe") == null){
console.warn("!!!" + window.pages[c.id]);
return;
}
c.meta.id = c.meta.id || crypto.randomUUID()
idToMetaId[c.id] = c.meta.id;
idToIfram[c.id] = c.sheetBox.querySelector("iframe");
c.sheetBox.querySelector("iframe").contentWindow.document.querySelectorAll("link").forEach(link=>{
cssRegistry[c.id] = cssRegistry[c.id] || [];
cssRegistry[c.id].push(link.href);
if (imgAssests.includes(link.href)) return;
imgAssests.push(link.href);
});
});
let url = location.origin;
for (let i of Object.keys(window.pages)){
if (idToIfram[i])
url = idToIfram[i].src;
oebps.file(truncate(i), fixXhtml(idToMetaId[i], url, window.pages[i], imgAssests, cssRegistry[i] || []));
}
downloadElem.innerHTML += `Downloading assets <span id="assetGath"> 0/${imgAssests.length} </span><br>`
downloadElem.scrollTo(0, downloadElem.scrollHeight);
gc = 0;
await Promise.all(imgAssests.map(name=>(async function(){
const response = await fetch(name.startsWith("http") ? name : location.origin + "/" + name);
if (response.status != 200) {
downloadElem.innerHTML += `<b>WARNING:</b> Could not fetch ${name}<br>`
downloadElem.scrollTo(0, downloadElem.scrollHeight);
return;
}
const blob = await response.blob();
oebps.file(name.startsWith("http") ? getFilenameFromURL(name) : name, blob, { compression: "STORE" });
gc+=1;
downloadElem.querySelector("span#assetGath").innerHTML = ` ${gc}/${imgAssests.length} `;
})()));
}
function enforceEpubXHTML(metaId, url, htmlString, assetRegistry, links) {
const parser = new DOMParser();
const doc = parser.parseFromString(htmlString, 'text/html');
const bod = doc.querySelector("body");
if (bod){
bod.setAttribute("id", metaId);
}
// Convert all elements to lowercase tag names
const elements = doc.getElementsByTagName('*');
for (let el of elements) {
const newElement = doc.createElement(el.tagName.toLowerCase());
// Copy attributes to the new element
for (let attr of el.attributes) {
newElement.setAttribute(attr.name, attr.value);
}
// Move child nodes to the new element
while (el.firstChild) {
newElement.appendChild(el.firstChild);
}
// Replace old element with the new one
el.parentNode.replaceChild(newElement, el);
}
for (let el of elements) {
if (el.tagName.toLowerCase() == "img" || el.tagName.toLowerCase() == "image"){
let src = el.getAttribute("src") || el.getAttribute("xlink:href");
if (!src) continue;
if (!(src.startsWith("http://") || src.startsWith("https://"))){
src = (new URL(src, new URL(url))).toString();
}
if (!assetRegistry.includes(src))
assetRegistry.push(src);
if (el.getAttribute("src"))
el.setAttribute("src", truncate(src));
if (el.getAttribute("xlink:href"))
el.setAttribute("xlink:href", truncate(src));
}
}
// Ensure the <head> element exists with a <title>
let head = doc.querySelector('head');
if (!head) {
head = doc.createElement('head');
doc.documentElement.insertBefore(head, doc.documentElement.firstChild);
}
let title = head.querySelector('title');
if (!title) {
title = doc.createElement('title');
title.textContent = BIF.map.title.main; // Default title
head.appendChild(title);
}
for (let link of links){
let src = link;
if (!(src.startsWith("http://") || src.startsWith("https://"))) {
src = (new URL(src, new URL(url))).toString();
}
let linkElement = doc.createElement('link');
linkElement.setAttribute("href", truncate(src));
linkElement.setAttribute("rel", "stylesheet");
linkElement.setAttribute("type", "text/css");
head.appendChild(linkElement);
}
// Get the serialized XHTML string
const serializer = new XMLSerializer();
let xhtmlString = serializer.serializeToString(doc);
// Ensure proper namespaces (if not already present)
if (!xhtmlString.includes('xmlns="http://www.w3.org/1999/xhtml"')) {
xhtmlString = xhtmlString.replace('<html>', '<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" xmlns:m="http://www.w3.org/1998/Math/MathML" xmlns:pls="http://www.w3.org/2005/01/pronunciation-lexicon" xmlns:ssml="http://www.w3.org/2001/10/synthesis" xmlns:svg="http://www.w3.org/2000/svg">');
}
return xhtmlString;
}
function fixXhtml(metaId, url, html, assetRegistry, links){
html = `<?xml version="1.0" encoding="UTF-8" standalone="no"?>
` + enforceEpubXHTML(metaId, url, `<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" xmlns:m="http://www.w3.org/1998/Math/MathML" xmlns:pls="http://www.w3.org/2005/01/pronunciation-lexicon" xmlns:ssml="http://www.w3.org/2001/10/synthesis" xmlns:svg="http://www.w3.org/2000/svg">`
+ html + `</html>`, assetRegistry, links);
return html;
}
function getMimeTypeFromFileName(fileName) {
const mimeTypes = {
jpg: 'image/jpeg',
jpeg: 'image/jpeg',
png: 'image/png',
gif: 'image/gif',
bmp: 'image/bmp',
webp: 'image/webp',
mp4: 'video/mp4',
mp3: 'audio/mp3',
pdf: 'application/pdf',
txt: 'text/plain',
html: 'text/html',
css: 'text/css',
json: 'application/json',
// Add more extensions as needed
};
const ext = fileName.split('.').pop().toLowerCase();
return mimeTypes[ext] || 'application/octet-stream';
}
function makePackage(oebps, assetRegistry){
const idStore = [];
const doc = document.implementation.createDocument(
'http://www.idpf.org/2007/opf', // default namespace
'package', // root element name
null // do not specify a doctype
);
// Step 2: Set attributes for the root element
const packageElement = doc.documentElement;
packageElement.setAttribute('version', '2.0');
packageElement.setAttribute('xml:lang', 'en');
packageElement.setAttribute('unique-identifier', 'pub-identifier');
packageElement.setAttribute('xmlns', 'http://www.idpf.org/2007/opf');
packageElement.setAttribute('xmlns:dc', 'http://purl.org/dc/elements/1.1/');
packageElement.setAttribute('xmlns:dcterms', 'http://purl.org/dc/terms/');
// Step 3: Create and append child elements to the root
const metadata = doc.createElementNS('http://www.idpf.org/2007/opf', 'metadata');
packageElement.appendChild(metadata);
// Create child elements for metadata
const dcIdentifier = doc.createElementNS('http://purl.org/dc/elements/1.1/', 'dc:identifier');
dcIdentifier.setAttribute('id', 'pub-identifier');
dcIdentifier.textContent = "" + BIF.map["-odread-buid"];
metadata.appendChild(dcIdentifier);
// Language
if (BIF.map.language.length){
const dcLanguage = doc.createElementNS('http://purl.org/dc/elements/1.1/', 'dc:language');
dcLanguage.setAttribute('xsi:type', 'dcterms:RFC4646');
dcLanguage.textContent = BIF.map.language[0];
packageElement.setAttribute('xml:lang', BIF.map.language[0]);
metadata.appendChild(dcLanguage);
}
// Identifier
const metaIdentifier = doc.createElementNS('http://www.idpf.org/2007/opf', 'meta');
metaIdentifier.setAttribute('id', 'meta-identifier');
metaIdentifier.setAttribute('property', 'dcterms:identifier');
metaIdentifier.textContent = "" + BIF.map["-odread-buid"];
metadata.appendChild(metaIdentifier);
// Title
const dcTitle = doc.createElementNS('http://purl.org/dc/elements/1.1/', 'dc:title');
dcTitle.setAttribute('id', 'pub-title');
dcTitle.textContent = BIF.map.title.main;
metadata.appendChild(dcTitle);
// Creator (Author)
if(BIF.map.creator.length){
const dcCreator = doc.createElementNS('http://purl.org/dc/elements/1.1/', 'dc:creator');
dcCreator.textContent = BIF.map.creator[0].name;
metadata.appendChild(dcCreator);
}
// Description
if(BIF.map.description){
// Remove HTML tags
let p = document.createElement("p");
p.innerHTML = BIF.map.description.full;
const dcDescription = doc.createElementNS('http://purl.org/dc/elements/1.1/', 'dc:description');
dcDescription.textContent = p.textContent;
metadata.appendChild(dcDescription);
}
// Step 4: Create the manifest, spine, guide, and other sections...
const manifest = doc.createElementNS('http://www.idpf.org/2007/opf', 'manifest');
packageElement.appendChild(manifest);
const spine = doc.createElementNS('http://www.idpf.org/2007/opf', 'spine');
spine.setAttribute("toc", "ncx");
packageElement.appendChild(spine);
const item = doc.createElementNS('http://www.idpf.org/2007/opf', 'item');
item.setAttribute('id', 'ncx');
item.setAttribute('href', 'toc.ncx');
item.setAttribute('media-type', 'application/x-dtbncx+xml');
manifest.appendChild(item);
// Generate out the manifest
let components = getBookComponents();
components.forEach(chapter =>{
const item = doc.createElementNS('http://www.idpf.org/2007/opf', 'item');
let id = chapter.meta.id;
if (idStore.includes(id)) {
id = id + "-" + crypto.randomUUID();
}
item.setAttribute('id', id);
idStore.push(id);
item.setAttribute('href', truncate(chapter.meta.path));
item.setAttribute('media-type', 'application/xhtml+xml');
manifest.appendChild(item);
const itemref = doc.createElementNS('http://www.idpf.org/2007/opf', 'itemref');
itemref.setAttribute('idref', chapter.meta.id);
itemref.setAttribute('linear', "yes");
spine.appendChild(itemref);
});
assetRegistry.forEach(asset => {
const item = doc.createElementNS('http://www.idpf.org/2007/opf', 'item');
let aname = asset.startsWith("http") ? getFilenameFromURL(asset) : asset;
let id = aname.split(".")[0];
if (idStore.includes(id)) {
id = id + "-" + crypto.randomUUID();
}
item.setAttribute('id', id);
idStore.push(id);
item.setAttribute('href', aname);
item.setAttribute('media-type', getMimeTypeFromFileName(aname));
manifest.appendChild(item);
});
// Step 5: Serialize the document to a string
const serializer = new XMLSerializer();
const xmlString = serializer.serializeToString(doc);
oebps.file("content.opf", `<?xml version="1.0" encoding="utf-8" standalone="no"?>\n` + xmlString);
}
function makeToc(oebps){
// Step 1: Create the document with a default namespace
const doc = document.implementation.createDocument(
'http://www.daisy.org/z3986/2005/ncx/', // default namespace
'ncx', // root element name
null // do not specify a doctype
);
// Step 2: Set attributes for the root element
const ncxElement = doc.documentElement;
ncxElement.setAttribute('version', '2005-1');
// Step 3: Create and append child elements to the root
const head = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'head');
ncxElement.appendChild(head);
const uidMeta = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'meta');
uidMeta.setAttribute('name', 'dtb:uid');
uidMeta.setAttribute('content', "" + BIF.map["-odread-buid"]);
head.appendChild(uidMeta);
// Step 4: Create docTitle and add text
const docTitle = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'docTitle');
ncxElement.appendChild(docTitle);
const textElement = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'text');
textElement.textContent = BIF.map.title.main;
docTitle.appendChild(textElement);
// Step 5: Create navMap and append navPoint elements
const navMap = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'navMap');
ncxElement.appendChild(navMap);
let components = getBookComponents();
components.forEach(chapter =>{
// First navPoint
const navPoint1 = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'navPoint');
navPoint1.setAttribute('id', chapter.meta.id);
navPoint1.setAttribute('playOrder', '' + (1+chapter.index));
navMap.appendChild(navPoint1);
const navLabel1 = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'navLabel');
navPoint1.appendChild(navLabel1);
const text1 = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'text');
text1.textContent = BIF.map.title.main;
navLabel1.appendChild(text1);
const content1 = doc.createElementNS('http://www.daisy.org/z3986/2005/ncx/', 'content');
content1.setAttribute('src', truncate(chapter.meta.path));
navPoint1.appendChild(content1);
});
// Step 6: Serialize the document to a string
const serializer = new XMLSerializer();
const xmlString = serializer.serializeToString(doc);
oebps.file("toc.ncx", `<?xml version="1.0" encoding="utf-8" standalone="no"?>\n` + xmlString);
}
async function downloadEPUB(){
let imageAssets = new Array();
const zip = new JSZip();
zip.file("mimetype", "application/epub+zip", {compression: "STORE"});
zip.folder("META-INF").file("container.xml", `<?xml version="1.0" encoding="UTF-8"?>
<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
<rootfiles>
<rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>
</rootfiles>
</container>
`);
let oebps = zip.folder("OEBPS");
await createContent(oebps, imageAssets);
makePackage(oebps, imageAssets);
makeToc(oebps);
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>%<br>";
// Generate the zip file
const zipBlob = await zip.generateAsync({
type: 'blob',
compression: "DEFLATE",
streamFiles: true,
}, (meta)=>{
if (meta.percent)
downloadElem.querySelector("#zipProg").textContent = meta.percent.toFixed(2);
});
downloadElem.innerHTML += `EPUB generation complete! Starting download<br>`
downloadElem.scrollTo(0, downloadElem.scrollHeight);
const downloadUrl = URL.createObjectURL(zipBlob);
const link = document.createElement('a');
link.href = downloadUrl;
link.download = BIF.map.title.main + '.epub';
link.click();
// Clean up the object URL
setTimeout(() => URL.revokeObjectURL(downloadUrl), 100);
downloadState = -1;
}
// Main entry point for audiobooks
function bifFoundBook(){
// New global style info
let s = document.createElement("style");
s.innerHTML = CSS;
document.head.appendChild(s)
if (!window.__bif_cfc1){
alert("Injection failed! __bif_cfc1 not found");
return;
}
const old_crf1 = window.__bif_cfc1;
window.__bif_cfc1 = (win, edata)=>{
// If the bind hook succeeds, then the first element of bound args
// will be the decryption function. So we just passivly build up an
// index of the pages!
pages[win.name] = old_crf1.__boundArgs[0](edata);
return old_crf1(win, edata);
};
buildBookPirateUi();
}
function downloadEPUBBBtn(){
if (downloadState != -1)
return;
downloadState = 0;
downloadElem.classList.add("active");
downloadElem.innerHTML = "<b>Starting download</b><br>";
downloadEPUB().then(()=>{});
}
function buildBookPirateUi(){
// Create the nav
let nav = document.createElement("div");
nav.innerHTML = bookNav;
nav.querySelector("#download").onclick = downloadEPUBBBtn;
nav.classList.add("pNav");
let pbar = document.querySelector(".nav-progress-bar");
pbar.insertBefore(nav, pbar.children[1]);
downloadElem = document.createElement("div");
downloadElem.classList.add("foldMenu");
downloadElem.setAttribute("tabindex", "-1"); // Don't mess with tab key
document.body.appendChild(downloadElem);
}
/* =========================================
END BOOK SECTION!
=========================================
*/
/* =========================================
BEGIN INITIALIZER SECTION!
=========================================
*/
// 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 && document.querySelector(".nav-progress-bar") != undefined){
clearInterval(intr);
let mode = location.hostname.split(".")[1];
if (mode == "listen"){
bifFoundAudiobook();
}else if (mode == "read"){
bifFoundBook();
}
}
}, 25);
})();
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