src/catalogue/tasks.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 from datetime import datetime
   6 from traceback import print_exc
   7 from celery.task import task
   8 from celery.utils.log import get_task_logger
   9 from django.conf import settings
  10 from wolnelektury.utils import localtime_to_utc
  11 from waiter.models import WaitedFile
  12
  13 task_logger = get_task_logger(__name__)
  14
  15
  16 # TODO: move to model?
  17 def touch_tag(tag):
  18     update_dict = {
  19         'changed_at': localtime_to_utc(datetime.now()),
  20     }
  21
  22     type(tag).objects.filter(pk=tag.pk).update(**update_dict)
  23
  24
  25 @task
  26 def index_book(book_id, book_info=None, **kwargs):
  27     from catalogue.models import Book
  28     try:
  29         return Book.objects.get(id=book_id).search_index(book_info, **kwargs)
  30     except Exception, e:
  31         print "Exception during index: %s" % e
  32         print_exc()
  33         raise e
  34
  35
  36 @task(ignore_result=True, rate_limit=settings.CATALOGUE_CUSTOMPDF_RATE_LIMIT)
  37 def build_custom_pdf(book_id, customizations, file_name, waiter_id=None):
  38     """Builds a custom PDF file."""
  39     try:
  40         from django.core.files import File
  41         from django.core.files.storage import DefaultStorage
  42         from catalogue.models import Book
  43
  44         task_logger.info(DefaultStorage().path(file_name))
  45         if not DefaultStorage().exists(file_name):
  46             kwargs = {
  47                 'cover': True,
  48             }
  49             if 'no-cover' in customizations:
  50                 kwargs['cover'] = False
  51                 customizations.remove('no-cover')
  52             pdf = Book.objects.get(pk=book_id).wldocument().as_pdf(
  53                     customizations=customizations,
  54                     morefloats=settings.LIBRARIAN_PDF_MOREFLOATS,
  55                     **kwargs)
  56             DefaultStorage().save(file_name, File(open(pdf.get_filename())))
  57     finally:
  58         if waiter_id is not None:
  59             WaitedFile.objects.filter(pk=waiter_id).delete()