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generate-opf-file.js
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generate-opf-file.js
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const fs = require('fs');
const path = require('path');
const slugify = require('slugify');
const md = require('markdown-it')({
html: true,
linkify: true,
breaks: true,
typographer: true
});
const outDirPath = process.argv.pop();
const bookFilePath = process.argv.pop();
const bookData = JSON.parse(fs.readFileSync(bookFilePath, { encoding: 'utf8' }));
const createMetadata = (bookData) => {
return `
<dc:identifier id="pub-id">${bookData.bookId}</dc:identifier>
<dc:title>${bookData.title}</dc:title>
<dc:creator id="creator">${bookData.author}</dc:creator>
<dc:publisher>${bookData.publisher}</dc:publisher>
<dc:date>${bookData.year}</dc:date>
<dc:language>no</dc:language>
`;
}
const createChapter = (chapter, chapterIdx) => {
return `
<section>
${md.render(chapter.content)}
</section>
`;
}
const targetPath = path.join(outDirPath, 'package.opf');
const content = `<?xml version="1.0" encoding="UTF-8"?>
<package version="3.0" unique-identifier="${bookData.bookId}" xmlns="http://www.idpf.org/2007/opf">
<metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
${createMetadata(bookData)}
</metadata>
<manifest>
<item id="cover-image" href="${bookData.cover.replace('https://kjartanm.github.io/easy-peasy-ebook/', '')}" media-type="image/jpeg" properties="cover-image" />
<item id="cover" href="cover.xhtml" media-type="application/xhtml+xml" />
<item id="nav" href="nav.xhtml" media-type="application/xhtml+xml" properties="nav" />
<item id="ncx" href="nav.ncx" media-type="application/x-dtbncx+xml" />
<item id="${slugify(bookData.title.toLowerCase())}" href="${slugify(bookData.title.toLowerCase())}.xhtml" media-type="application/xhtml+xml" />
</manifest>
<spine toc="ncx">
<itemref idref="cover" />
<itemref idref="${slugify(bookData.title.toLowerCase())}" />
</spine>
</package>`;
fs.writeFile(targetPath, content, 'utf-8', (err, data) => console.log(err ? err : "success: " + targetPath));