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import streamlit as st
import ebooklib
from ebooklib import epub
from PIL import Image
import io
import markdown
import uuid
from datetime import datetime
from collections import OrderedDict
# Initialize session state variables
if 'chapters' not in st.session_state:
st.session_state.chapters = OrderedDict({"Chapter 1": ""})
if 'metadata' not in st.session_state:
st.session_state.metadata = {
"description": "",
"publisher": "Self Published",
"publication_date": datetime.now().strftime("%Y-%m-%d"),
"rights": "All rights reserved"
}
# Helper functions
def get_chapter_num(chapter_title):
try:
return int(chapter_title.split()[1])
except:
return float('inf')
def add_chapter():
chapter_numbers = [get_chapter_num(title) for title in st.session_state.chapters.keys()]
next_number = max(chapter_numbers) + 1 if chapter_numbers else 1
new_chapters = OrderedDict()
existing_chapters = sorted(st.session_state.chapters.items(), key=lambda x: get_chapter_num(x[0]))
for title, content in existing_chapters:
new_chapters[title] = content
new_chapters[f"Chapter {next_number}"] = ""
st.session_state.chapters = new_chapters
def remove_chapter(chapter_title):
if chapter_title in st.session_state.chapters:
new_chapters = OrderedDict()
for title, content in st.session_state.chapters.items():
if title != chapter_title:
new_chapters[title] = content
st.session_state.chapters = new_chapters
def update_chapter_content(chapter_title, new_content):
if chapter_title in st.session_state.chapters:
st.session_state.chapters[chapter_title] = new_content
def update_chapter_title(old_title, new_title):
if old_title in st.session_state.chapters and old_title != new_title:
content = st.session_state.chapters[old_title]
new_chapters = OrderedDict()
for title, chapter_content in st.session_state.chapters.items():
if title == old_title:
new_chapters[new_title] = content
else:
new_chapters[title] = chapter_content
st.session_state.chapters = new_chapters
def convert_markdown_to_html(markdown_text):
return markdown.markdown(markdown_text, extensions=['tables', 'fenced_code', 'footnotes'])
def create_epub(title, author, cover_image, chapters_content, metadata):
book = epub.EpubBook()
# Set metadata
book.set_identifier(str(uuid.uuid4()))
book.set_title(title)
book.set_language('en')
book.add_author(author)
book.add_metadata('DC', 'description', metadata['description'])
book.add_metadata('DC', 'publisher', metadata['publisher'])
book.add_metadata('DC', 'date', metadata['publication_date'])
book.add_metadata('DC', 'rights', metadata['rights'])
# Handle cover image
cover_page = None
if cover_image is not None:
cover_image_bytes = io.BytesIO()
cover_image.save(cover_image_bytes, format='PNG')
cover_image_bytes = cover_image_bytes.getvalue()
cover_item = epub.EpubItem(
uid='cover_image',
file_name='images/cover.png',
media_type='image/png',
content=cover_image_bytes
)
book.add_item(cover_item)
# Create cover page
cover_page = epub.EpubHtml(title='Cover', file_name='cover.xhtml')
cover_page.content = f'''<html><body><div style="text-align: center; padding: 0; margin: 0;">
<img src="images/cover.png" alt="cover"/></div></body></html>'''
book.add_item(cover_page)
# Set the cover page as the book's cover
book.set_cover("images/cover.png", cover_image_bytes)
# Create table of contents page
toc_page = epub.EpubHtml(title='Table of Contents', file_name='toc.xhtml')
toc_content = ['<h1>Table of Contents</h1>', '<nav>', '<ol>']
for chapter_title in chapters_content.keys():
toc_content.append(f'<li><a href="#{chapter_title}">{chapter_title}</a></li>')
toc_content.extend(['</ol>', '</nav>'])
toc_page.content = '\n'.join(toc_content)
book.add_item(toc_page)
# Create chapters
chapter_objects = []
for idx, (chapter_title, chapter_content) in enumerate(chapters_content.items(), 1):
html_content = convert_markdown_to_html(chapter_content)
chapter = epub.EpubHtml(
title=chapter_title,
file_name=f'chapter_{idx}.xhtml',
content=f'<h1 id="{chapter_title}">{chapter_title}</h1>\n{html_content}'
)
book.add_item(chapter)
chapter_objects.append(chapter)
# Add navigation
book.toc = chapter_objects
book.add_item(epub.EpubNcx())
book.add_item(epub.EpubNav())
# Add CSS
style = '''
body { font-family: "Crimson Text", Georgia, serif; line-height: 1.6; margin: 2em; }
h1, h2, h3 { color: #2c3e50; margin-top: 1.5em; }
p { text-align: justify; margin-bottom: 1em; }
img { max-width: 100%; display: block; margin: 1em auto; }
nav { margin: 2em 0; }
nav ol { list-style-type: none; padding-left: 0; }
nav ol li { margin-bottom: 0.5em; }
nav ol li a { color: #2c3e50; text-decoration: none; }
nav ol li a:hover { text-decoration: underline; }
'''
nav_css = epub.EpubItem(
uid="style",
file_name="style/main.css",
media_type="text/css",
content=style
)
book.add_item(nav_css)
# Set spine with correct order: cover -> toc -> chapters
spine = []
if cover_page:
spine.append(cover_page)
spine.append(toc_page)
spine.extend(chapter_objects)
book.spine = spine
return book
def main():
st.set_page_config(page_title="📚 EPUB Creator", layout="wide")
st.title("📚 EPUB Creator")
with st.expander("📋 Book Details", expanded=True):
col1, col2 = st.columns(2)
with col1:
title = st.text_input("Book Title", "My Book")
author = st.text_input("Author Name")
with col2:
st.session_state.metadata["publisher"] = st.text_input("Publisher", value=st.session_state.metadata["publisher"])
st.session_state.metadata["description"] = st.text_area("Book Description", value=st.session_state.metadata["description"])
with st.expander("🖼️ Cover Image", expanded=True):
cover_image = st.file_uploader("Upload cover image (PNG/JPG)", type=['png', 'jpg', 'jpeg'])
if cover_image:
st.image(cover_image, width=300)
with st.expander("📝 Chapters", expanded=True):
st.button("➕ Add New Chapter", on_click=add_chapter)
for chapter_title in st.session_state.chapters.keys():
st.subheader(chapter_title)
new_title = st.text_input("Title", value=chapter_title, key=f"title_{chapter_title}")
if new_title != chapter_title:
update_chapter_title(chapter_title, new_title)
st.rerun()
content = st.text_area(
"Content (Markdown supported)",
value=st.session_state.chapters[chapter_title],
height=200,
key=f"content_{chapter_title}"
)
# Update content if changed
if content != st.session_state.chapters[chapter_title]:
update_chapter_content(chapter_title, content)
if len(st.session_state.chapters) > 1:
st.button("🗑️ Remove Chapter", key=f"remove_{chapter_title}", on_click=remove_chapter, args=(chapter_title,))
st.markdown("---")
with st.expander("👁️ Preview", expanded=True):
if st.session_state.chapters:
chapter_select = st.selectbox("Select chapter to preview", options=list(st.session_state.chapters.keys()))
st.markdown("### Preview")
st.markdown(st.session_state.chapters[chapter_select])
if st.button("📚 Generate EPUB", type="primary"):
if not title or not author:
st.error("Please provide both title and author name!")
return
if not any(st.session_state.chapters.values()):
st.error("Please add some content to at least one chapter!")
return
try:
cover_img = Image.open(cover_image) if cover_image else None
book = create_epub(title, author, cover_img, st.session_state.chapters, st.session_state.metadata)
epub_bytes = io.BytesIO()
epub.write_epub(epub_bytes, book)
st.download_button("📥 Download EPUB", data=epub_bytes.getvalue(), file_name=f"{title.lower().replace(' ', '_')}.epub", mime="application/epub+zip")
st.success("✅ EPUB generated successfully!")
except Exception as e:
st.error(f"Error generating EPUB: {str(e)}")
if __name__ == "__main__":
main()
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