apps/catalogue/signals.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 django.conf import settings
   6 from django.core.cache import caches
   7 from django.db.models.signals import post_save, post_delete
   8 from django.dispatch import receiver
   9 from ssify import flush_ssi_includes
  10 from newtagging.models import tags_updated
  11 from picture.models import Picture, PictureArea
  12 from .models import BookMedia, Book, Collection, Fragment, Tag
  13
  14
  15 ####
  16 # BookMedia
  17 ####
  18
  19
  20 @receiver([post_save, post_delete], sender=BookMedia)
  21 def bookmedia_save(sender, instance, **kwargs):
  22     instance.book.save()
  23
  24
  25 ####
  26 # Collection
  27 ####
  28
  29
  30 @receiver(post_save, sender=Collection)
  31 def collection_save(sender, instance, **kwargs):
  32     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
  33     flush_ssi_includes([
  34         '/katalog/%s.json' % lang
  35         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])
  36
  37
  38 @receiver(post_delete, sender=Collection)
  39 def collection_delete(sender, instance, **kwargs):
  40     flush_ssi_includes([
  41         '/katalog/%s.json' % lang
  42         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])
  43
  44 ####
  45 # Book
  46 ####
  47
  48
  49 @receiver(post_save, sender=Book)
  50 def book_save(sender, instance, **kwargs):
  51     # Books come out anywhere.
  52     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
  53     instance.flush_includes()
  54
  55
  56 @receiver(post_delete, sender=Book)
  57 def book_delete(sender, instance, **kwargs):
  58     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
  59     flush_ssi_includes([
  60         '/katalog/%s.json' % lang
  61         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])
  62
  63     if not settings.NO_SEARCH_INDEX:
  64         # remove the book from search index, when it is deleted.
  65         from search.index import Index
  66         idx = Index()
  67         idx.remove_book(instance)
  68         idx.index_tags()
  69
  70
  71 ####
  72 # Tag
  73 ####
  74
  75
  76 @receiver(Tag.after_change)
  77 def tag_after_change(sender, instance, languages, **kwargs):
  78     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
  79     flush_ssi_includes([
  80         '/katalog/%s.json' % lang
  81         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])
  82
  83     for model in Book, Picture:
  84         for instance in model.tagged.with_all([instance]).only('pk'):
  85             instance.flush_includes()
  86
  87     if instance.category == 'author':
  88         for model in Fragment, PictureArea:
  89             for instance in model.tagged.with_all([instance]).only('pk'):
  90                 instance.flush_includes()
  91
  92
  93 @receiver(tags_updated)
  94 def receive_tags_updated(sender, instance, affected_tags, **kwargs):
  95     categories = set(tag.category for tag in affected_tags
  96         if tag.category not in ('set', 'book'))
  97     if not categories:
  98         return
  99
 100     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
 101     instance.flush_includes()
 102     flush_ssi_includes([
 103         '/katalog/%s.json' % lang
 104         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])