Generating epub.
This commit is contained in:
Vahagn Khachatryan
39
src/epub.js
39
src/epub.js
@@ -1,13 +1,12 @@
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var isNode=new Function("try {return this===global;}catch(e){return false;}");
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if (isNode()){
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var JSZip = require('jszip');
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var StringDecoder = require('string_decoder').StringDecoder;
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var XMLSerializer = require('xmlserializer')
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var DOMParser = require('xmldom').DOMParser
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var generatedBufferType = 'uint8array'
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} else {
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var generatedBufferType = 'uint8array'
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}
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// var JSZip = require('jszip');
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// var StringDecoder = require('string_decoder').StringDecoder;
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// let html = new StringDecoder("utf-8").write(content)
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var textDecoder = new TextDecoder("utf-8");
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// var xmlSerializer = require('xmlserializer')
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var xmlSerializer = new XMLSerializer();
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// var DOMParser = require('xmldom').DOMParser
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var domParser = new DOMParser();
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var generatedBufferType = 'blob'
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class EpubXhtml{
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constructor(filename) {
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@@ -18,9 +17,9 @@ class EpubXhtml{
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}
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convert(content){
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let html = new StringDecoder("utf-8").write(content)
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let dom = new DOMParser().parseFromString(html, 'text/html');
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let xml = XMLSerializer.serializeToString(dom);
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let html = textDecoder.decode(content);
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let dom = domParser.parseFromString(html, 'text/html');
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let xml = xmlSerializer.serializeToString(dom);
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// let cnt = `<?xml version="1.0" encoding="utf-8" standalone="no"?>
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// <!DOCTYPE html>
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let cnt = `<?xml version="1.0" encoding="utf-8" standalone="no"?>
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@@ -159,8 +158,6 @@ class EpubNav{
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class EpubMeta{
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constructor() {
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this.zip = new JSZip();
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this.metadata = {
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book_id: 'book_id',
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title: 'title',
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@@ -201,7 +198,7 @@ class EpubMeta{
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addManifest(filename, mime){
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let key = filename
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if (mime.startsWith('text/html')){
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if (mime && mime.startsWith('text/html')){
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let o = new EpubXhtml(filename)
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this.override[key] = o
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filename = o.filename
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@@ -253,7 +250,7 @@ class EpubMeta{
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}
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class EpubWriter{
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constructor(book_id) {
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constructor() {
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this.zip = new JSZip();
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this.meta = new EpubMeta();
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this.override = {}
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@@ -272,6 +269,10 @@ class EpubWriter{
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` );
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}
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addMetaInfoFile(filename, content){
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this.zip.file("META-INF/"+filename, content)
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}
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addFile(filename, content){
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console.log(`epub ${filename}:`)
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@@ -294,6 +295,4 @@ class EpubWriter{
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}
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}
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if (isNode()){
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module.exports = EpubWriter
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}
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// module.exports = EpubWriter
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@@ -16,7 +16,8 @@
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"activeTab",
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"tabs",
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"downloads",
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"*://*.safaribooksonline.com/*"
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"*://*.safaribooksonline.com/*",
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"*://*.oreilly.com/*"
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],
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"browser_action": {
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623
src/sidebar.js
623
src/sidebar.js
@@ -1,285 +1,338 @@
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function getCurrentTab() {
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console.debug("Querying active tab.");
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var queryInfo = {
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active: true,
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currentWindow: true
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};
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return browser.tabs.query(queryInfo)
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.then(function(tabs) {
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if (tabs.length == 1){
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let url = tabs[0].url;
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console.info(`Active URL: ${url}`);
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return url;
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} else {
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console.error(`Expected 1 active tab, received: ${tabs}`);
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throw 'Failed to get active tab.';
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}
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}, onError);
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}
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function extractBookId(url){
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console.debug(`Extracting book id from ${url}`);
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// match a url like:
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// https://www.safaribooksonline.com/library/view/startup-opportunities-2nd/9781119378181/
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// https://www.safaribooksonline.com/library/view/startup-growth-engines/77961SEM00001/
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let match = url.match(/\/library\/view\/[^\/]+\/(\w+)\//);
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let bookId = match && match[1];
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if (bookId) {
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console.debug(`Extracted book id: ${bookId}`);
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return bookId;
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}else{
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console.error('Could not extract book id from url, only '
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+'domain "www.safaribooksonline.com“ is supported.');
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throw 'Failed to extract book id.';
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}
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}
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class Book{
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constructor(book_id, epub) {
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this.book_id = book_id
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this.raw_book = {}
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this.chapter_list = []
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this.chapter_info = {}
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this.book_files = {}
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this.book_info = null
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this.book_toc = null
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this.book_flattoc = null
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}
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downloadResource(url){
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console.info(`Downloading ${url}`)
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return fetch(url, {
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credentials: 'include'
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}).then((res) => {
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// console.log(`Downloaded.`)
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return res;
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}, onError)
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}
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downloadJson(url){
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return this.downloadResource(url)
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.then((res) => {
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return res.json();
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}, onError);
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}
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downloadBookInfo(){
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console.info(`Downloading book info for ${this.book_id}`);
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let url = `https://www.safaribooksonline.com/api/v1/book/${this.book_id}/`;
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return this.downloadJson(url)
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.then((book_info) => {
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this.book_info = book_info;
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}, onError);
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}
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downloadChapterList(){
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function helper(book, url){
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console.info(`Downloading chapter list ${url}`);
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return book.downloadJson(url)
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.then((chapter_list) => {
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book.chapter_list
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= book.chapter_list.concat(chapter_list.results);
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if (chapter_list.next != null){
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return helper(book, chapter_list.next);
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}
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}, onError);
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}
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return helper(this, this.book_info.chapter_list)
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.then(() => {
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console.info(`Chapter List Downloaded.`);
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}, onError);
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}
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downloadMetaContent(){
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let downloads = []
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this.insertBookFile(
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this.book_info.cover,
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"cover.img")
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downloads.push(
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this.downloadJson(this.book_info.toc)
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.then((json) => {
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this.book_toc=json
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}))
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downloads.push(
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this.downloadJson(this.book_info.flat_toc)
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.then((json) => {
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this.book_flattoc=json
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}))
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downloads.push(
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Promise.map(this.book_info.chapters, (chapter) => {
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renderProgress(`${chapter}`)
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return this.downloadJson(chapter)
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.then((json) => {
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this.chapter_info[chapter] = json
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return this.extractChapterAssets(json)
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})
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},{concurrency: 10}))
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return Promise.all(downloads)
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}
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extractChapterAssets(json){
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if (!json.asset_base_url || !json.content){
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throw "Missing data."
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}
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// Html
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this.insertBookFile(
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json.content,
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json.full_path)
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// List of images.
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for (let idx in json.images){
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this.insertBookFile(
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json.asset_base_url + json.images[idx],
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json.images[idx])
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}
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// List of stylesheets.
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for (let idx in json.stylesheets){
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this.insertBookFile(
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json.stylesheets[idx].original_url,
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json.stylesheets[idx].full_path)
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}
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}
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downloadContent(){
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return Promise.map(Object.keys(this.book_files), (url) => {
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renderProgress(`${this.book_files[url].filename}`)
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return this.downloadResource(url)
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.then((res) => {
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if (res.ok){
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this.book_files[url].headers = res.headers
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this.book_files[url].mime = res.headers.get('Content-Type')
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this.book_files[url].body = res.blob()
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}
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})
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},{concurrency: 10})
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}
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insertBookFile(url, filename){
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this.book_files[url] = {
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url: url,
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filename: filename,
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headers: null,
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mime: null,
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body: null
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}
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}
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}
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class SidebarPage{
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constructor() {
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$('#loading').show();
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$('#error-message').hide();
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$('#book-info').hide();
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$("#book-file-list").empty();
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}
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renderInfo(book){
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$("#book-name").text(book.book_info.title);
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$("#book-cover").attr("src", book.book_info.cover);
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$('#book-info').show();
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}
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renderDone(){
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$('#loading').hide();
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}
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renderChapterList(book){
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// Add chapters to UI
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for (let chapter_idx in book.chapter_list) {
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let chapter = book.chapter_list[chapter_idx];
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var chapter_dom = $("<li></li>")
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.addClass("list-group-item")
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.html(chapter.title)
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.attr("chapterIndex", chapter_idx);
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$("#book-chapter-list").append(chapter_dom);
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}
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$('#loading').hide();
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}
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}
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function onError(error) {
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console.error(`Error: ${error}`);
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$('#error-message').text(`Error: ${error}`);
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$('#error-message').show();
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$('#loading').hide();
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$('#book-info').hide();
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}
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function renderProgress(txt){
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// Add chapters to UI
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var progress_dom = $("<li></li>")
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.addClass("list-group-item")
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.html(txt)
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$("#book-file-list").prepend(progress_dom);
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}
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function createEpub(book, epub){
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epub.addFile("book.json", JSON.stringify(book, null, '\t'))
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for (let url in book.book_files){
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file = book.book_files[url]
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epub.addFile(file.filename, file.body)
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}
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}
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function onDownloadBookClicked(){
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console.info("Begin book download.");
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page = new SidebarPage()
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getCurrentTab()
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.then(extractBookId, onError)
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.then((book_id) => {
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epub = new EpubWriter();
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book = new Book(book_id);
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book.downloadBookInfo()
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.then(() => { page.renderInfo(book); })
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// .then(() => { return book.downloadChapterList(); })
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// .then(() => { return page.renderChapterList(book); })
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.then(() => { return book.downloadMetaContent(); })
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.then(() => { return book.downloadContent(); })
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.then(() => { return createEpub(book, epub); })
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.then(() => { return epub.generateAsync(); })
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.then((file) => {
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let title = book.book_info.title
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let filename = "books/"
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+ title.replace(/[^a-z0-9]/gi, '_').toLowerCase()
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+ ".zip"
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console.log(`Zip file name ${filename}`)
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renderProgress(`Saved to ${filename}`)
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let url = window.URL.createObjectURL(file)
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return browser.downloads.download({ "filename" : filename, url : url})
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})
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.then(() =>{
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page.renderDone();
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})
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}, onError);
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}
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document.addEventListener('DOMContentLoaded', function() {
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console.log("Start safari book hunter.");
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$('#loading').hide();
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$('#error-message').hide();
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$('#book-info').hide();
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$('#download-book-button').click(() => {
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onDownloadBookClicked();
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});
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$('#deselect-all-button').show()
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$('#download-button').show()
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$('#download-section').hide();
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// let bookInfo = new BookInfo();
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})
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function getCurrentTab() {
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console.debug("Querying active tab.");
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var queryInfo = {
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active: true,
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currentWindow: true
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};
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return browser.tabs.query(queryInfo)
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.then(function(tabs) {
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if (tabs.length == 1){
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let url = tabs[0].url;
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console.info(`Active URL: ${url}`);
|
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return url;
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} else {
|
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console.error(`Expected 1 active tab, received: ${tabs}`);
|
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throw 'Failed to get active tab.';
|
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}
|
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}, onError);
|
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}
|
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|
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function extractBookId(url){
|
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console.debug(`Extracting book id from ${url}`);
|
||||
// match a url like:
|
||||
// https://www.safaribooksonline.com/library/view/startup-opportunities-2nd/9781119378181/
|
||||
// https://www.safaribooksonline.com/library/view/startup-growth-engines/77961SEM00001/
|
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let match = url.match(/\/library\/view\/[^\/]+\/(\w+)\//);
|
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let bookId = match && match[1];
|
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|
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if (bookId) {
|
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console.debug(`Extracted book id: ${bookId}`);
|
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return bookId;
|
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}else{
|
||||
console.error('Could not extract book id from url, only '
|
||||
+'domain "www.safaribooksonline.com“ is supported.');
|
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throw 'Failed to extract book id.';
|
||||
}
|
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}
|
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|
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class Book{
|
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|
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constructor(book_id, epub) {
|
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this.book_id = book_id
|
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this.raw_book = {}
|
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this.chapter_list = []
|
||||
this.chapter_info = {}
|
||||
this.book_files = {}
|
||||
this.book_info = null
|
||||
this.book_toc = null
|
||||
this.book_flattoc = null
|
||||
}
|
||||
|
||||
downloadResource(url){
|
||||
console.info(`Downloading ${url}`)
|
||||
return fetch(url, {
|
||||
credentials: 'include',
|
||||
mode: "no-cors" // no-cors, cors, *same-origin
|
||||
}).then((res) => {
|
||||
// console.log(`Downloaded.`)
|
||||
return res;
|
||||
}, onError)
|
||||
}
|
||||
|
||||
downloadJson(url){
|
||||
return this.downloadResource(url)
|
||||
.then((res) => {
|
||||
return res.json();
|
||||
}, onError);
|
||||
}
|
||||
|
||||
downloadBookInfo(){
|
||||
console.info(`Downloading book info for ${this.book_id}`);
|
||||
let url = `https://learning.oreilly.com/api/v1/book/${this.book_id}/`;
|
||||
return this.downloadJson(url)
|
||||
.then((book_info) => {
|
||||
this.book_info = book_info;
|
||||
}, onError);
|
||||
}
|
||||
|
||||
downloadMetaContent(){
|
||||
let downloads = []
|
||||
|
||||
this.insertBookFile(
|
||||
this.book_info.cover,
|
||||
"cover.img")
|
||||
|
||||
downloads.push(
|
||||
this.downloadJson(this.book_info.toc)
|
||||
.then((json) => {
|
||||
this.book_toc=json
|
||||
}))
|
||||
downloads.push(
|
||||
this.downloadJson(this.book_info.flat_toc)
|
||||
.then((json) => {
|
||||
this.book_flattoc=json
|
||||
}))
|
||||
downloads.push(
|
||||
Promise.map(this.book_info.chapters, (chapter) => {
|
||||
renderProgress(`${chapter}`)
|
||||
return this.downloadJson(chapter)
|
||||
.then((json) => {
|
||||
this.chapter_info[chapter] = json
|
||||
return this.extractChapterAssets(json)
|
||||
})
|
||||
},{concurrency: 10}))
|
||||
|
||||
return Promise.all(downloads)
|
||||
}
|
||||
|
||||
|
||||
extractChapterAssets(json){
|
||||
if (!json.asset_base_url || !json.content){
|
||||
throw "Missing data."
|
||||
}
|
||||
// Html
|
||||
this.insertBookFile(
|
||||
json.content,
|
||||
json.full_path)
|
||||
// List of images.
|
||||
for (let idx in json.images){
|
||||
this.insertBookFile(
|
||||
json.asset_base_url + json.images[idx],
|
||||
json.images[idx])
|
||||
}
|
||||
// List of stylesheets.
|
||||
for (let idx in json.stylesheets){
|
||||
this.insertBookFile(
|
||||
json.stylesheets[idx].original_url,
|
||||
json.stylesheets[idx].full_path)
|
||||
}
|
||||
}
|
||||
|
||||
downloadContent(){
|
||||
return Promise.map(Object.keys(this.book_files), (url) => {
|
||||
renderProgress(`${this.book_files[url].filename}`)
|
||||
return this.downloadResource(url)
|
||||
.then((res) => {
|
||||
if (res.ok){
|
||||
this.book_files[url].headers = res.headers
|
||||
this.book_files[url].mime = res.headers.get('Content-Type')
|
||||
return res.arrayBuffer().then((arrBuffer)=>{
|
||||
this.book_files[url].body = arrBuffer
|
||||
})
|
||||
}
|
||||
})
|
||||
},{concurrency: 10})
|
||||
}
|
||||
|
||||
insertBookFile(url, filename){
|
||||
this.book_files[url] = {
|
||||
url: url,
|
||||
filename: filename,
|
||||
headers: null,
|
||||
mime: null,
|
||||
body: null
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
class SidebarPage{
|
||||
|
||||
constructor() {
|
||||
$('#loading').show();
|
||||
$('#error-message').hide();
|
||||
$('#book-info').hide();
|
||||
$("#book-file-list").empty();
|
||||
}
|
||||
|
||||
renderInfo(book){
|
||||
$("#book-name").text(book.book_info.title);
|
||||
$("#book-cover").attr("src", book.book_info.cover);
|
||||
$('#book-info').show();
|
||||
}
|
||||
|
||||
renderDone(){
|
||||
$('#loading').hide();
|
||||
}
|
||||
|
||||
renderChapterList(book){
|
||||
// Add chapters to UI
|
||||
for (let chapter_idx in book.chapter_list) {
|
||||
let chapter = book.chapter_list[chapter_idx];
|
||||
var chapter_dom = $("<li></li>")
|
||||
.addClass("list-group-item")
|
||||
.html(chapter.title)
|
||||
.attr("chapterIndex", chapter_idx);
|
||||
$("#book-chapter-list").append(chapter_dom);
|
||||
}
|
||||
$('#loading').hide();
|
||||
}
|
||||
}
|
||||
|
||||
function onError(error) {
|
||||
console.error(`Error: ${error}`);
|
||||
$('#error-message').text(`Error: ${error}`);
|
||||
$('#error-message').show();
|
||||
$('#loading').hide();
|
||||
$('#book-info').hide();
|
||||
}
|
||||
|
||||
function renderProgress(txt){
|
||||
// Add chapters to UI
|
||||
var progress_dom = $("<li></li>")
|
||||
.addClass("list-group-item")
|
||||
.html(txt)
|
||||
$("#book-file-list").prepend(progress_dom);
|
||||
}
|
||||
|
||||
|
||||
function fillMetadata(epub, book)
|
||||
{
|
||||
epub.meta.addTitle(book.book_info.title)
|
||||
epub.meta.addLanguage(book.book_info.language)
|
||||
epub.meta.addBookId(book.book_info.isbn)
|
||||
for (let i in book.book_info.authors){
|
||||
let author = book.book_info.authors[i]
|
||||
epub.meta.addAuthor(author)
|
||||
}
|
||||
for (let i in book.book_info.publishers){
|
||||
let publisher = book.book_info.publishers[i]
|
||||
epub.meta.addPublisher(publisher.name)
|
||||
}
|
||||
// # The metadata element or deprecated dc-metadata element contains
|
||||
// # at least one identifier element, at least one title element,
|
||||
// # and at least one language element drawn from the Dublin Core tag
|
||||
// # set.
|
||||
// epub.set_title('Test Title')
|
||||
// epub.set_language('en')
|
||||
// epub.set_direction('ltr')
|
||||
// # epub.set_cover(file_name, content, create_page=True):
|
||||
// # epub.add_author(author, file_as=None, role=None, uid='creator'):
|
||||
// # epub.add_metadata(namespace, name, value, others=None):
|
||||
// # epub.set_unique_metadata(namespace, name, value, others=None):
|
||||
}
|
||||
|
||||
function fillManifest(epub, book)
|
||||
{
|
||||
for (let key in book.book_files){
|
||||
let f = book.book_files[key]
|
||||
epub.meta.addManifest(f.filename, f.mime)
|
||||
}
|
||||
|
||||
let f = book.book_files[book.book_info.cover]
|
||||
epub.meta.addCover(f.filename)
|
||||
}
|
||||
|
||||
function fillToc(epub, book)
|
||||
{
|
||||
for (let i in book.book_toc){
|
||||
let toc_item = book.book_toc[i]
|
||||
epub.meta.addToc(
|
||||
toc_item.filename,
|
||||
toc_item.label,
|
||||
toc_item.depth)
|
||||
}
|
||||
}
|
||||
|
||||
function fillSpine(epub, book)
|
||||
{
|
||||
for (let i in book.book_info.chapters){
|
||||
let url = book.book_info.chapters[i]
|
||||
let full_path = book.chapter_info[url].full_path
|
||||
epub.meta.addSpine(full_path)
|
||||
}
|
||||
}
|
||||
|
||||
function fillGuide(epub, book)
|
||||
{}
|
||||
|
||||
function createEpub(book, epub){
|
||||
epub.addMetaInfoFile("book.json", JSON.stringify(book, null, '\t'))
|
||||
|
||||
// OPF file info.
|
||||
fillManifest(epub, book)
|
||||
fillSpine(epub, book)
|
||||
fillGuide(epub, book)
|
||||
fillMetadata(epub, book)
|
||||
|
||||
// NCX and NAV files.
|
||||
fillToc(epub, book)
|
||||
|
||||
for (let url in book.book_files){
|
||||
file = book.book_files[url]
|
||||
epub.addFile(file.filename, file.body)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
function onDownloadBookClicked(){
|
||||
console.info("Begin book download.");
|
||||
page = new SidebarPage()
|
||||
|
||||
getCurrentTab()
|
||||
.then(extractBookId, onError)
|
||||
.then((book_id) => {
|
||||
epub = new EpubWriter();
|
||||
book = new Book(book_id);
|
||||
book.downloadBookInfo()
|
||||
.then(() => { page.renderInfo(book); })
|
||||
// .then(() => { return book.downloadChapterList(); })
|
||||
// .then(() => { return page.renderChapterList(book); })
|
||||
.then(() => { return book.downloadMetaContent(); })
|
||||
.then(() => { return book.downloadContent(); })
|
||||
.then(() => { return createEpub(book, epub); })
|
||||
.then(() => { return epub.generateAsync(); })
|
||||
.then((file) => {
|
||||
let title = book.book_info.title
|
||||
let filename = "books/"
|
||||
+ title.replace(/[^a-z0-9]/gi, '_').toLowerCase()
|
||||
+ ".epub"
|
||||
console.log(`Zip file name ${filename}`)
|
||||
renderProgress(`Saved to ${filename}`)
|
||||
let url = window.URL.createObjectURL(file)
|
||||
return browser.downloads.download({ "filename" : filename, url : url})
|
||||
})
|
||||
.then(() =>{
|
||||
page.renderDone();
|
||||
})
|
||||
|
||||
}, onError);
|
||||
}
|
||||
|
||||
document.addEventListener('DOMContentLoaded', function() {
|
||||
console.log("Start safari book hunter.");
|
||||
$('#loading').hide();
|
||||
$('#error-message').hide();
|
||||
$('#book-info').hide();
|
||||
|
||||
$('#download-book-button').click(() => {
|
||||
onDownloadBookClicked();
|
||||
});
|
||||
|
||||
|
||||
|
||||
$('#deselect-all-button').show()
|
||||
$('#download-button').show()
|
||||
$('#download-section').hide();
|
||||
// let bookInfo = new BookInfo();
|
||||
})
|
||||
|
||||
10
test/app.js
10
test/app.js
@@ -1,6 +1,7 @@
|
||||
let fs = require("fs");
|
||||
let JSZip = require('jszip');
|
||||
let EpubWriter = require('../src/epub')
|
||||
var fs = require("fs");
|
||||
var JSZip = require('jszip');
|
||||
var EpubWriter = require('../src/epub')
|
||||
|
||||
let zip = new JSZip()
|
||||
let epub = new EpubWriter()
|
||||
|
||||
@@ -134,6 +135,9 @@ function fillSpine(epub, book_info)
|
||||
for (let i in book_info.book_info.chapters){
|
||||
let s = book_info.book_info.chapters[i].split('/')
|
||||
epub.meta.addSpine(s[s.length-1])
|
||||
// let url = book_info.book_info.chapters[i]
|
||||
// let full_name = book_info.chapter_info[url].full_name
|
||||
// epub.meta.addSpine(full_name)
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Reference in New Issue
Block a user