src/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.set_audio_length()
  23     instance.book.save()
  24
  25
  26 ####
  27 # Collection
  28 ####
  29
  30
  31 @receiver(post_save, sender=Collection)
  32 def collection_save(sender, instance, **kwargs):
  33     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
  34     flush_ssi_includes([
  35         '/katalog/%s.json' % lang
  36         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])
  37
  38
  39 @receiver(post_delete, sender=Collection)
  40 def collection_delete(sender, instance, **kwargs):
  41     flush_ssi_includes([
  42         '/katalog/%s.json' % lang
  43         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])
  44
  45 ####
  46 # Book
  47 ####
  48
  49
  50 @receiver(post_save, sender=Book)
  51 def book_save(sender, instance, **kwargs):
  52     # Books come out anywhere.
  53     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
  54     instance.flush_includes()
  55
  56
  57 @receiver(post_delete, sender=Book)
  58 def book_delete(sender, instance, **kwargs):
  59     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
  60     flush_ssi_includes([
  61         '/katalog/%s.json' % lang
  62         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])
  63
  64     if not settings.NO_SEARCH_INDEX:
  65         # remove the book from search index, when it is deleted.
  66         from search.index import Index
  67         idx = Index()
  68         idx.remove_book(instance)
  69         idx.index_tags()
  70
  71
  72 ####
  73 # Tag
  74 ####
  75
  76
  77 @receiver(Tag.after_change)
  78 def tag_after_change(sender, instance, languages, **kwargs):
  79     caches[settings.CACHE_MIDDLEWARE_ALIAS].clear()
  80     flush_ssi_includes([
  81         '/katalog/%s.json' % lang
  82         for lang in [lc for (lc, _ln) in settings.LANGUAGES]])
  83
  84     for model in Book, Picture:
  85         for model_instance in model.tagged.with_all([instance]).only('pk'):
  86             model_instance.flush_includes()
  87
  88     if instance.category == 'author':
  89         for model in Fragment, PictureArea:
  90             for model_instance in model.tagged.with_all([instance]).only('pk'):
  91                 model_instance.flush_includes()
  92
  93
  94 @receiver(tags_updated)
  95 def receive_tags_updated(sender, instance, affected_tags, **kwargs):
  96     categories = set(tag.category for tag in affected_tags 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]])