src/catalogue/tasks.py

   1 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   2 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   3 #
   4 from traceback import print_exc
   5 from celery import shared_task
   6 from celery.utils.log import get_task_logger
   7 from django.conf import settings
   8 from django.utils import timezone
   9
  10 from catalogue.models import Book
  11 from catalogue.utils import absolute_url, gallery_url
  12 from waiter.models import WaitedFile
  13
  14 task_logger = get_task_logger(__name__)
  15
  16
  17 # TODO: move to model?
  18 def touch_tag(tag):
  19     update_dict = {
  20         'changed_at': timezone.now(),
  21     }
  22
  23     type(tag).objects.filter(pk=tag.pk).update(**update_dict)
  24
  25
  26 @shared_task(ignore_result=True)
  27 def build_field(pk, field_name):
  28     book = Book.objects.get(pk=pk)
  29     task_logger.info("build %s.%s" % (book.slug, field_name))
  30     field_file = getattr(book, field_name)
  31     field_file.build()
  32
  33
  34 @shared_task
  35 def index_book(book_id, book_info=None, **kwargs):
  36     try:
  37         return Book.objects.get(id=book_id).search_index(book_info, **kwargs)
  38     except Exception as e:
  39         print("Exception during index: %s" % e)
  40         print_exc()
  41         raise e
  42
  43
  44 @shared_task(ignore_result=True, rate_limit=settings.CATALOGUE_CUSTOMPDF_RATE_LIMIT)
  45 def build_custom_pdf(book_id, customizations, file_name, waiter_id=None):
  46     """Builds a custom PDF file."""
  47     try:
  48         from django.core.files import File
  49         from django.core.files.storage import DefaultStorage
  50
  51         task_logger.info(DefaultStorage().path(file_name))
  52         if not DefaultStorage().exists(file_name):
  53             kwargs = {
  54                 'cover': True,
  55             }
  56             if 'nocover' in customizations:
  57                 kwargs['cover'] = False
  58                 customizations.remove('nocover')
  59             wldoc = Book.objects.get(pk=book_id).wldocument()
  60             pdf = wldoc.as_pdf(
  61                 customizations=customizations,
  62                 morefloats=settings.LIBRARIAN_PDF_MOREFLOATS,
  63                 base_url=absolute_url(gallery_url(wldoc.book_info.url.slug)),
  64                 **kwargs)
  65             with open(pdf.get_filename(), 'rb') as f:
  66                 DefaultStorage().save(file_name, File(f))
  67     finally:
  68         if waiter_id is not None:
  69             WaitedFile.objects.filter(pk=waiter_id).delete()
  70
  71
  72 @shared_task(ignore_result=True)
  73 def update_counters():
  74     from .helpers import update_counters
  75     update_counters()
  76
  77
  78 @shared_task(ignore_result=True)
  79 def update_references(book_id):
  80     Book.objects.get(id=book_id).update_references()
  81