88 lines
4.2 KiB
Python
88 lines
4.2 KiB
Python
from __future__ import annotations
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import html
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import re
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import zipfile
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from pathlib import Path
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def write_epub(*, title: str, series: str, chapters: list[dict[str, str]], destination: Path) -> Path:
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destination.parent.mkdir(parents=True, exist_ok=True)
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manifest = [
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'<item id="nav" href="nav.xhtml" media-type="application/xhtml+xml" properties="nav"/>',
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'<item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml"/>',
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'<item id="css" href="style.css" media-type="text/css"/>',
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'<item id="title" href="title.xhtml" media-type="application/xhtml+xml"/>',
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]
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spine = ['<itemref idref="title"/>']
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navigation = []
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ncx = []
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with zipfile.ZipFile(destination, "w") as archive:
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archive.writestr("mimetype", "application/epub+zip", compress_type=zipfile.ZIP_STORED)
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archive.writestr(
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"META-INF/container.xml",
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'<?xml version="1.0"?><container version="1.0" '
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'xmlns="urn:oasis:names:tc:opendocument:xmlns:container"><rootfiles>'
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'<rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/>'
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"</rootfiles></container>",
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)
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archive.writestr(
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"OEBPS/style.css",
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"body{font-family:serif;line-height:1.45;margin:5%}h1{text-align:center}"
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"p{text-indent:1.2em;margin:0 0 .35em}.first{text-indent:0}.title{text-align:center;margin-top:30%}",
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)
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archive.writestr(
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"OEBPS/title.xhtml",
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_xhtml(title, f'<div class="title"><h1>{html.escape(title)}</h1><p>{html.escape(series)}</p></div>'),
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)
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for index, chapter in enumerate(chapters, start=1):
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filename = f"chapter-{index}.xhtml"
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item_id = f"chapter-{index}"
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chapter_title = chapter.get("title") or f"Chapter {index}"
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manifest.append(
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f'<item id="{item_id}" href="{filename}" media-type="application/xhtml+xml"/>'
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)
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spine.append(f'<itemref idref="{item_id}"/>')
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navigation.append(
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f'<li><a href="{filename}">{html.escape(chapter_title)}</a></li>'
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)
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ncx.append(
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f'<navPoint id="n{index}" playOrder="{index}"><navLabel><text>{html.escape(chapter_title)}</text></navLabel>'
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f'<content src="{filename}"/></navPoint>'
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)
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paragraphs = []
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for paragraph_index, paragraph in enumerate(
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part.strip() for part in re.split(r"\n\s*\n", chapter.get("content", "")) if part.strip()
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):
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class_name = ' class="first"' if paragraph_index == 0 else ""
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paragraphs.append(f"<p{class_name}>{html.escape(paragraph)}</p>")
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archive.writestr(
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f"OEBPS/{filename}",
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_xhtml(chapter_title, f"<h1>{html.escape(chapter_title)}</h1>{''.join(paragraphs)}"),
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)
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archive.writestr(
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"OEBPS/nav.xhtml",
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_xhtml(title, f'<nav xmlns:epub="http://www.idpf.org/2007/ops" epub:type="toc"><ol>{"".join(navigation)}</ol></nav>'),
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)
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archive.writestr(
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"OEBPS/toc.ncx",
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f'<?xml version="1.0"?><ncx xmlns="http://www.daisy.org/z3986/2005/ncx/" version="2005-1">'
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f"<docTitle><text>{html.escape(title)}</text></docTitle><navMap>{''.join(ncx)}</navMap></ncx>",
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)
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archive.writestr(
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"OEBPS/content.opf",
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f'<?xml version="1.0"?><package xmlns="http://www.idpf.org/2007/opf" unique-identifier="bookid" version="3.0">'
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f'<metadata xmlns:dc="http://purl.org/dc/elements/1.1/"><dc:identifier id="bookid">artifex-{html.escape(title)}</dc:identifier>'
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f"<dc:title>{html.escape(title)}</dc:title><dc:language>en</dc:language></metadata>"
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f'<manifest>{"".join(manifest)}</manifest><spine toc="ncx">{"".join(spine)}</spine></package>',
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)
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return destination
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def _xhtml(title: str, body: str) -> str:
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return (
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'<?xml version="1.0" encoding="UTF-8"?>'
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'<html xmlns="http://www.w3.org/1999/xhtml"><head>'
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f"<title>{html.escape(title)}</title><link rel=\"stylesheet\" type=\"text/css\" href=\"style.css\"/>"
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f"</head><body>{body}</body></html>"
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)
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