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models.py
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import imghdr
import os
import pickle
import shutil
from io import BytesIO
from typing import List, Tuple
from PIL import Image
from reportlab.lib.pagesizes import A4
from reportlab.lib.utils import ImageReader
from reportlab.pdfgen.canvas import Canvas
from dokidokimd.tools.ddmd_logger import get_logger
from dokidokimd.tools.misc import get_object_mem_size, make_path_os_safe
from dokidokimd.tools.translator import translate as _
logger = get_logger(__name__)
class Chapter:
def __init__(self, manga, title: str = None) -> None:
self.manga = manga # type: Manga
self.title = title # type: str
self.url = None # type: str
self.pages = [] # type: List[bytes]
self.downloaded = False # type: bool
self.saved_images = False # type: bool
self.converted = False # type: bool
self.in_memory = False # type: bool
def number_of_pages(self):
return len(self.pages)
def add_page(self, page_as_bytes: bytes):
self.pages.append(page_as_bytes)
def set_downloaded(self, state=True):
self.downloaded = state
self.in_memory = state
def clear_state(self):
self.pages = []
self.downloaded = False
self.saved_images = False
self.in_memory = False
self.converted = False
def get_download_path(self, base_path: str) -> str:
return os.path.join(self.manga.get_download_path(base_path), self.get_title())
def get_pdf_path(self, base_path: str) -> str:
return self.manga.get_pdf_path(base_path)
def get_title(self) -> str:
return make_path_os_safe(self.title)
def dump(self):
return pickle.dumps(self)
def __getstate__(self):
state = self.__dict__.copy()
try:
state['pages'] = []
state['in_memory'] = False
except KeyError as e:
logger.error(_(F'Could not drop filed while dumping object, reason {e}'))
return state
def __setstate__(self, state):
self.__dict__.update(state)
def save_images(self, base_path: str) -> Tuple[bool, str]:
images_dir = self.get_download_path(base_path)
try:
if not os.path.isdir(images_dir):
os.makedirs(images_dir, exist_ok=True)
for idx, page in enumerate(self.pages):
img_type = imghdr.what(BytesIO(page))
path = os.path.join(images_dir, F'{idx:0>3d}.{img_type}')
with open(path, 'wb') as f:
f.write(page)
except Exception as e:
logger.error(_(F'Could not save images to {images_dir}\nError message: {e}'))
return False, images_dir
self.saved_images = True
return True, images_dir
def make_pdf(self, base_path: str) -> Tuple[bool, str]:
pdf_dir = self.get_pdf_path(base_path)
if not os.path.isdir(pdf_dir):
os.makedirs(pdf_dir, exist_ok=True)
pdf_path = os.path.join(pdf_dir, F'{self.get_title()}.pdf')
builder = Canvas(pdf_path, pageCompression=False, pagesize=A4)
builder.setTitle(self.title)
if len(self.pages) > 0:
for i, page in enumerate(self.pages):
image = Image.open(BytesIO(page))
builder.setPageSize(image.size)
builder.drawImage(ImageReader(image), 0, 0)
builder.showPage()
else:
images_dir = self.get_download_path(base_path)
if not os.path.isdir(images_dir):
logger.warning(_('Could not convert to PDF, source path with images does not exist or images not downloaded'))
return False, pdf_path
try:
files = [os.path.join(images_dir, f) for f in os.listdir(images_dir)
if os.path.isfile(os.path.join(images_dir, f))]
files = sorted(files)
for i, file in enumerate(files):
builder.setPageSize(Image.open(file).size)
builder.drawImage(file, 0, 0)
builder.showPage()
except Exception as e:
logger.error(_(F'Could not save PDF to {pdf_path}\nError message: {e}'))
return False, pdf_path
if not os.path.exists(os.path.dirname(pdf_path)):
os.makedirs(os.path.dirname(pdf_path), exist_ok=True)
builder.save()
self.converted = True
logger.info(_(F'PDF saved to a {pdf_path} file.'))
return True, pdf_path
def chapter_images_present(self, base_path) -> bool:
images_dir = self.get_download_path(base_path)
if not os.path.isdir(images_dir):
return False
if not os.listdir(images_dir):
return False
return True
def remove_from_disk(self, base_path):
shutil.rmtree(self.get_download_path(base_path), ignore_errors=True)
shutil.rmtree(self.get_pdf_path(base_path), ignore_errors=True)
class Manga:
def __init__(self, title, url, manga_site) -> None:
self.manga_site = manga_site # type: MangaSite
self.title = title # type: str
self.url = url # type: str
self.author = '' # type: str
self.cover = '' # type: str
self.status = '' # type: str
self.genres = '' # type: str
self.summary = '' # type: str
self.chapters = [] # type: List[Chapter]
self.downloaded = False # type: bool
def clear_state(self):
self.chapters = []
self.downloaded = False
def get_download_path(self, base_path: str) -> str:
return os.path.join(base_path, 'downloaded', self.manga_site.site_name, self.get_title())
def get_pdf_path(self, base_path: str) -> str:
return os.path.join(base_path, 'converted', self.manga_site.site_name, self.get_title())
def get_title(self) -> str:
return make_path_os_safe(self.title)
def add_chapter(self, chapter, reverse=False) -> None:
if self.chapters is None:
self.chapters = list()
if reverse:
self.chapters.insert(0, chapter)
else:
self.chapters.append(chapter)
elif chapter.url not in [x.url for x in self.chapters if x.url == chapter.url]:
if reverse:
self.chapters.insert(0, chapter)
else:
self.chapters.append(chapter)
def dump(self):
return pickle.dumps(self)
def __getstate__(self):
state = self.__dict__.copy()
return state
def __setstate__(self, state):
self.__dict__.update(state)
if not hasattr(self, 'downloaded'):
self.downloaded = False
def remove_from_disk(self, base_path):
shutil.rmtree(self.get_download_path(base_path), ignore_errors=True)
shutil.rmtree(self.get_pdf_path(base_path), ignore_errors=True)
class MangaSite:
def __init__(self, site_name=None) -> None:
self.site_name = site_name # type: str
self.url = None # type: str
self.mangas = [] # type: List[Manga]
def clear_state(self):
self.mangas = []
def add_manga(self, manga) -> None:
if self.mangas is None:
self.mangas = list()
self.mangas.append(manga)
elif manga.url not in [x.url for x in self.mangas if x.url == manga.url]:
self.mangas.append(manga)
def dump(self):
logger.debug(_(F'Dumped {self.site_name} site with {len(self.mangas)} mangas - size in memory = {get_object_mem_size(self)} bytes.'))
return pickle.dumps(self)
def __getstate__(self):
state = self.__dict__.copy()
return state
def __setstate__(self, state):
self.__dict__.update(state)
@staticmethod
def load_dumped_site(dump_object):
return pickle.loads(dump_object)
if __name__ == '__main__':
pass