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import nanoid
import os
from PIL import Image
import pathlib
import shutil
import glob
import logging
import src.db as db
import src.book_files as book_files
logger = logging.getLogger(__name__)
def store(library, conn, data, cover, books, book = None):
book_id = book['id'] if book else nanoid.generate()
directory = f'{library}/{book_id}'
try:
os.makedirs(directory, exist_ok=True)
save_cover(cover, directory)
if book:
update_books(directory, books)
if not already_exist(directory, books) or has_delete(library, book_id, books):
else:
create_books(directory, books)
if book:
db.update_book(conn, book_id, data)
else:
db.create_book(conn, book_id, data)
return book_id
except Exception as err:
if book:
logger.error(f'Error updating book: %s', err)
else:
logger.error(f'Error creating book: %s', err)
shutil.rmtree(directory, ignore_errors=True)
db.delete_book(conn, book_id)
return None
def already_exist(directory, books):
for path, name in books.items():
ext = path.suffix
dest = f'{directory}/{name}{ext}'
if not dest == str(path):
return False
return True
def has_delete(library, book_id, books):
new_paths = books.keys()
for path in book_files.get(library, book_id):
if not path in new_paths:
return True
return False
def update_books(directory, books):
try:
tmp_dir = f'{directory}/tmp'
os.makedirs(tmp_dir, exist_ok=True)
# Copy books to tmp directory
for i, path in enumerate(books.keys()):
dest = f'{tmp_dir}/{i}'
logger.info('Copying %s to %s', path, dest)
shutil.copyfile(path, dest)
# Remove existing files (except cover.png and tmp)
for path in glob.glob(f'{directory}/*'):
bn = os.path.basename(path)
if bn not in ['cover.png', 'cover-min.png', 'tmp']:
logger.info('Removing %s', path)
pathlib.Path.unlink(path)
# Move from tmp to directory
for i, path in enumerate(books.keys()):
src = f'{tmp_dir}/{i}'
ext = path.suffix
name = books[path]
dest = f'{directory}/{name}{ext}'
logger.info('Copying %s to %s', src, dest)
shutil.copyfile(src, dest)
finally:
# Remove tmp
shutil.rmtree(f'{directory}/tmp', ignore_errors=True)
def create_books(directory, books):
for path, name in books.items():
ext = path.suffix
shutil.copy(path, f'{directory}/{name}{ext}')
# Save as PNG
def save_cover(image, directory):
image = image.convert('RGB')
image.save(f'{directory}/cover.png', 'Png', optimize=True, quality=85)
image_min = resize(image, 200)
image_min.save(f'{directory}/cover-min.png', 'Png', optimize=True, quality=85)
def resize(image, new_width):
width, height = image.size
if width > new_width:
image = image.resize((new_width, int(new_width * height / width)), Image.LANCZOS)
return image
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