Generating epub.
This commit is contained in:
Vahagn Khachatryan
3
.vscode/launch.json
vendored
3
.vscode/launch.json
vendored
@@ -37,7 +37,8 @@
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"name": "Launch Node.JS",
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"type": "node",
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"request": "launch",
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"program": "${file}"
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"program": "${workspaceFolder}/test/app.js"
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// "program": "${file}"
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}
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]
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}
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295
src/epub.js
295
src/epub.js
@@ -1,38 +1,297 @@
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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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const { TextDecoder } = require('string_decoder');
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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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class EpubXhtml{
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constructor(filename) {
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let name = filename.split('.')
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name[name.length-1] = 'xhtml'
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this.filename = name.join('.')
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this.mime = 'application/xhtml+xml'
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}
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convert(content){
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// var blob = new Blob([content],{type:'text/plain'});
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// var reader = new FileReader();
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// reader.onload = function(evt){callback(evt.target.result);};
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// reader.readAsText(blob, encoding);
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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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<html xmlns="http://www.w3.org/1999/xhtml"
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xmlns:epub="http://www.idpf.org/2007/ops">
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<head>
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<title></title>
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</head>
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<body>
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${new TextDecoder("utf-8").write(content)}
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</body>
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</html>
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`
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return cnt
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}
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}
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class EpubOpf{
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constructor(filename, meta) {
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this.filename = filename
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this.meta = meta
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}
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generate(){
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let m = this.meta
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let cnt = `<?xml version="1.0" encoding="utf-8"?>
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<package xmlns="http://www.idpf.org/2007/opf"
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xmlns:dc="http://purl.org/dc/elements/1.1/"
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xmlns:dcterms="http://purl.org/dc/terms/"
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unique-identifier="pub-id"
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version="3.0">
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<metadata>
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<meta property="dcterms:modified">2013-03-22T12:24:00Z</meta>
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<dc:rights>Please read the legal notice included in this e-book and/or check the copyright status in your country.</dc:rights>
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<dc:identifier id="pub-id">${m.metadata.book_id}</dc:identifier>
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<dc:title>${m.metadata.title}</dc:title>
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<dc:language>${m.metadata.language}</dc:language>\n`
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if (m.metadata.publisher){
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cnt += ` <dc:publisher>${m.metadata.publisher}</dc:publisher>\n`
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}
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if (m.metadata.cover_image){
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cnt += ` <meta content="cover-image" name="${m.metadata.cover_image}"/>\n`
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}
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// <dc:creator opf:file-as="Greatness, Georgia's" opf:role="aut">Lauren Baratz-Logsted</dc:creator>
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cnt +=' </metadata>\n <manifest>\n'
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for (let id in m.manifest){
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let f = m.manifest[id]
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if (f.hasOwnProperty('property')){
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cnt += ` <item id="${f.id}" media-type="${f.mime}" href="${f.filename}" properties="${f.property}"/>\n`
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}else{
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cnt += ` <item id="${f.id}" media-type="${f.mime}" href="${f.filename}"/>\n`
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}
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}
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cnt += ` </manifest>\n <spine toc="${m.getId(m.ncx().filename)}">\n`
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for (let i in m.spine){
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cnt += ` <itemref idref="${m.spine[i]}" />\n`
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}
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cnt += ' </spine>\n <guide>\n'
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cnt += ` <reference href="${m.nav().filename}" title="Table of Contents" type="toc"/>\n`
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cnt += ' </guide>\n</package>\n'
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return cnt
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}
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}
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class EpubNcx{
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constructor(filename, meta) {
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this.filename = filename
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this.meta = meta
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this.mime = 'application/x-dtbncx+xml'
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}
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generate(){
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let m = this.meta
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let cnt = `<?xml version="1.0" encoding="UTF-8"?>
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<ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" xml:lang="en" version="2005-1">
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<head>
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<meta name="dtb:uid" content="${m.metadata.book_id}"/>
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<meta name="dtb:depth" content="2"/>
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<meta name="dtb:totalPageCount" content="0"/>
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<meta name="dtb:maxPageNumber" content="0"/>
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</head>
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<docTitle>
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<text>${m.metadata.title}</text>
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</docTitle>
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<navMap>
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`
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for (let i in this.meta.toc){
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let toc_item = this.meta.toc[i]
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cnt +=
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` <navPoint class="chapter" id="navpoint-${i}" playOrder="${i}">\n`
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+` <navLabel><text>${toc_item.label}</text></navLabel>\n`
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+` <content src="${toc_item.filename}"/>\n`
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+' </navPoint>\n'
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}
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cnt += ' </navMap>\n</ncx>\n'
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return cnt
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}
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}
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class EpubNav{
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constructor(filename, meta) {
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this.filename = filename
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this.meta = meta
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this.mime = 'application/xhtml+xml'
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}
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generate(){
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let m = this.meta
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let cnt = `<?xml version="1.0" encoding="utf-8" standalone="no"?>
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<!DOCTYPE html>
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<html xmlns="http://www.w3.org/1999/xhtml"
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xmlns:epub="http://www.idpf.org/2007/ops">
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<head>
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<title>${m.metadata.title}</title>
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</head>
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<body>
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<h1>${m.metadata.title}</h1>
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<nav epub:type="toc" id="toc">
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<h2>Table Of Content</h2>
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<ol>
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`
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for (let i in this.meta.toc){
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let toc_item = this.meta.toc[i]
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cnt += ` <li><a href="${toc_item.filename}">${toc_item.label}</a></li>\n`
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}
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cnt += ' </ol>\n </nav>\n</body>\n</html>\n'
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return cnt
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}
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}
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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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language: 'en',
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author: 'author',
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publisher: 'publisher',
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cover_image: 'cover.img'
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}
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this.manifest = {}
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this.spine = []
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this.guide = []
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this.toc = []
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this.override = {}
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this.addManifest(this.ncx().filename, this.ncx().mime)
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this.addManifest(this.nav().filename, this.nav().mime, 'nav')
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this.manifest[this.nav().filename].property = 'nav' //TODO
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}
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addBookId(book_id){
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this.metadata.book_id = book_id
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}
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addTitle(title){
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this.metadata.title = title
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}
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addAuthor(author){
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this.metadata.author = author
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}
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addPublisher(publisher){
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this.metadata.publisher = publisher
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}
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addLanguage(lang){
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this.metadata.language = lang
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}
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addMetaData(){
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}
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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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let o = new EpubXhtml(filename)
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this.override[key] = o
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filename = o.filename
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mime = o.mime
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}
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let id = 'id_' + filename.replace(/[^a-z0-9]/gi, '_').toLowerCase()
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this.manifest[key] =
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{
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filename : filename,
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mime : mime,
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id : id
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}
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}
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getId(filename){
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return this.manifest[filename].id
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}
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addSpine(filename){
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this.spine.push(this.manifest[filename].id)
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}
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addCover(filename){
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this.manifest[filename].property = 'cover-image'
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}
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addToc(filename, label, depth){
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if (filename in this.override){
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filename = this.override[filename].filename
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}
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this.toc.push({
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filename: filename,
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label: label,
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depth: depth
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})
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}
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opf(){
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return new EpubOpf("content.opf", this)
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}
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ncx(){
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return new EpubNcx("content.ncx", this)
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}
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nav(){
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return new EpubNav("content.xhtml", this)
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}
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}
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class EpubWriter{
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constructor(book_id) {
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this.zip = new JSZip();
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this.filename = "test";
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this.meta = new EpubMeta();
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this.override = {}
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this.createEpubStruct();
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// this.image
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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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}
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createEpubStruct(){
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this.zip.file("mimetype", "application/epub+zip", {compression: "STORE"});
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this.zip.file("META-INF/container.xml", `
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<?xml version='1.0' encoding='utf-8'?>
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<container xmlns="urn:oasis:names:tc:opendocument:xmlns:container" version="1.0">
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this.zip.file("META-INF/container.xml",
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`<?xml version='1.0' encoding='utf-8'?>
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<container xmlns="urn:oasis:names:tc:opendocument:xmlns:container" version="1.0">
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<rootfiles>
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<rootfile media-type="application/oebps-package+xml" full-path="EPUB/content.opf"/>
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</rootfiles>
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</container>
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`);
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</container>
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` );
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}
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addFile(name, content){
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console.log(`epub ${name}: ${content}`)
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this.zip.file("EPUB/"+name, content)
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addFile(filename, content){
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console.log(`epub ${filename}: ${content}`)
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if (filename in this.meta.override){
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let o = this.meta.override[filename]
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filename = o.filename
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content = o.convert(content)
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}
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this.zip.file("EPUB/"+filename, content)
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}
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generateAsync(){
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this.addFile(this.meta.ncx().filename, this.meta.ncx().generate())
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this.addFile(this.meta.nav().filename, this.meta.nav().generate())
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this.addFile(this.meta.opf().filename, this.meta.opf().generate())
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return this.zip.generateAsync({
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type: 'blob',
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type: generatedBufferType,
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compression: "DEFLATE"})
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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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@@ -39,9 +39,10 @@ function extractBookId(url){
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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.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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@@ -116,6 +117,7 @@ class Book{
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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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121
test/app.js
121
test/app.js
@@ -1,6 +1,8 @@
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var fs = require("fs");
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var JSZip = require('jszip');
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let fs = require("fs");
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let JSZip = require('jszip');
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let EpubWriter = require('../src/epub')
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let zip = new JSZip()
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let epub = new EpubWriter()
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new JSZip.external.Promise((resolve, reject)=>{
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fs.readFile('test/mythical_man_month__the__essays_on_software_engineering__anniversary_edition.zip',
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@@ -18,15 +20,122 @@ new JSZip.external.Promise((resolve, reject)=>{
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})
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})
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.then((zip)=>{
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console.log(zip)
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zip.folder('EPUB').forEach((fileName, _)=>{
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console.log(`${fileName}`)
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return loadBookInfo(zip)
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.then((book_info)=>{
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createEbook(epub, book_info)
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return copyContent(epub, zip)
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})
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.then(()=>{
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return epub.generateAsync()
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})
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.then((file)=>{
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fs.writeFile('ttttest.epub', file, (err) => {
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if (err)
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return console.log(err);
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})
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})
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})
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.catch((reason)=>{
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console.log(`Error: ${reason}`)
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})
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function copyContent(epub, zip)
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{
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let jobs = []
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zip.folder('EPUB').forEach((fileName, zipObj)=>{
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console.log(`${fileName}`)
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jobs.push(
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zipObj.async('uint8array')
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.then((buffer)=>{
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epub.addFile(fileName, buffer)
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})
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)
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})
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return Promise.all(jobs)
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}
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function loadBookInfo(zip)
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{
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let book_json = zip.file('EPUB/book.json')
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if (!book_json){
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book_json = zip.file('META-INF/book.json')
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}
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return book_json.async('string')
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.then((blob)=>{
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return JSON.parse(blob)
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})
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}
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console.log('test')
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function createEbook(epub, book_info)
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{
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console.log(`${book_info}`)
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// OPF file info.
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fillManifest(epub, book_info)
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fillSpine(epub, book_info)
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fillGuide(epub, book_info)
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fillMetadata(epub, book_info)
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// NCX and NAV files.
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fillToc(epub, book_info)
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}
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function fillMetadata(epub, book_info)
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{
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epub.meta.addTitle(book_info.book_info.title)
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epub.meta.addLanguage(book_info.book_info.language)
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epub.meta.addBookId(book_info.book_info.isbn)
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for (let i in book_info.book_info.authors){
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let author = book_info.book_info.authors[i]
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epub.meta.addAuthor(author)
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}
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for (let i in book_info.book_info.publishers){
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let publisher = book_info.book_info.publishers[i]
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epub.meta.addPublisher(publisher.name)
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}
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// # The metadata element or deprecated dc-metadata element contains
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// # at least one identifier element, at least one title element,
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// # and at least one language element drawn from the Dublin Core tag
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// # set.
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// epub.set_title('Test Title')
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// epub.set_language('en')
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// epub.set_direction('ltr')
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// # epub.set_cover(file_name, content, create_page=True):
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// # epub.add_author(author, file_as=None, role=None, uid='creator'):
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// # epub.add_metadata(namespace, name, value, others=None):
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// # epub.set_unique_metadata(namespace, name, value, others=None):
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}
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function fillManifest(epub, book_info)
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{
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for (let key in book_info.book_files){
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let f = book_info.book_files[key]
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epub.meta.addManifest(f.filename, f.mime)
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}
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let f = book_info.book_files[book_info.book_info.cover]
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epub.meta.addCover(f.filename)
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}
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function fillToc(epub, book_info)
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{
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for (let i in book_info.book_toc){
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let toc_item = book_info.book_toc[i]
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epub.meta.addToc(
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toc_item.filename,
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toc_item.label,
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toc_item.depth)
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}
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}
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function fillSpine(epub, book_info)
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{
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for (let i in book_info.book_info.chapters){
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let s = book_info.book_info.chapters[i].split('/')
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epub.meta.addSpine(s[s.length-1])
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}
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}
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function fillGuide(epub, book_info)
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{}
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Reference in New Issue
Block a user