f3cacaaf7d3fa63603eba72c86de785506d04111
[wolnelektury.git] / 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]])