turns out properties are not callable
[redakcja.git] / apps / catalogue / models / chunk.py
1 # -*- coding: utf-8 -*-
2 #
3 # This file is part of FNP-Redakcja, licensed under GNU Affero GPLv3 or later.
4 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
5 #
6 from django.conf import settings
7 from django.db import models
8 from django.db.utils import IntegrityError
9 from django.template.loader import render_to_string
10 from django.utils.translation import ugettext_lazy as _
11 from catalogue.helpers import cached_in_field
12 from catalogue.managers import VisibleManager
13 from catalogue.tasks import refresh_instance
14 from dvcs import models as dvcs_models
15
16
17 class Chunk(dvcs_models.Document):
18     """ An editable chunk of text. Every Book text is divided into chunks. """
19     REPO_PATH = settings.CATALOGUE_REPO_PATH
20
21     book = models.ForeignKey('Book', editable=False, verbose_name=_('book'))
22     number = models.IntegerField(_('number'))
23     title = models.CharField(_('title'), max_length=255, blank=True)
24     slug = models.SlugField(_('slug'))
25     gallery_start = models.IntegerField(_('gallery start'), null=True, blank=True, default=1)
26
27     # cache
28     _short_html = models.TextField(null=True, blank=True, editable=False)
29     _hidden = models.NullBooleanField(editable=False)
30     _changed = models.NullBooleanField(editable=False)
31
32     # managers
33     objects = models.Manager()
34     visible_objects = VisibleManager()
35
36     class Meta:
37         app_label = 'catalogue'
38         unique_together = [['book', 'number'], ['book', 'slug']]
39         ordering = ['number']
40         verbose_name = _('chunk')
41         verbose_name_plural = _('chunks')
42         permissions = [('can_pubmark', 'Can mark for publishing')]
43
44     class TagMeta:
45         verbose_name = u'etap pracy'
46         verbose_name_plural = u'etapy pracy'
47
48     # Representing
49     # ============
50
51     def __unicode__(self):
52         return "%d:%d: %s" % (self.book_id, self.number, self.title)
53
54     @models.permalink
55     def get_absolute_url(self):
56         return "wiki_editor", [self.book.slug, self.slug]
57
58     def pretty_name(self, book_length=None):
59         title = self.book.title
60         if self.title:
61             title += ", %s" % self.title
62         if book_length > 1:
63             title += " (%d/%d)" % (self.number, book_length)
64         return title
65
66     # Creating and manipulation
67     # =========================
68
69     def split(self, slug, title='', **kwargs):
70         """ Create an empty chunk after this one """
71         self.book.chunk_set.filter(number__gt=self.number).update(
72                 number=models.F('number')+1)
73         new_chunk = None
74         while not new_chunk:
75             new_slug = self.book.make_chunk_slug(slug)
76             try:
77                 new_chunk = self.book.chunk_set.create(
78                     number=self.number+1, slug=new_slug[:50], title=title[:255], **kwargs)
79             except IntegrityError:
80                 pass
81         return new_chunk
82
83     @classmethod
84     def get(cls, book_slug, chunk_slug=None):
85         if chunk_slug is None:
86             return cls.objects.get(book__slug=book_slug, number=1)
87         else:
88             return cls.objects.get(book__slug=book_slug, slug=chunk_slug)
89
90     # State & cache
91     # =============
92
93     def new_publishable(self):
94         change = self.publishable()
95         if not change:
96             return False
97         return change.publish_log.exists()
98
99     def is_changed(self):
100         if self.head is None:
101             return False
102         return not self.head.publishable
103     changed = cached_in_field('_changed')(is_changed)
104
105     def is_hidden(self):
106         return self.book.hidden()
107     hidden = cached_in_field('_hidden')(is_hidden)
108
109     @cached_in_field('_short_html')
110     def short_html(self):
111         return render_to_string(
112                     'catalogue/book_list/chunk.html', {'chunk': self})
113
114     def touch(self):
115         update = {
116             "_changed": self.is_changed(),
117             "_hidden": self.is_hidden(),
118             "_short_html": None,
119         }
120         Chunk.objects.filter(pk=self.pk).update(**update)
121         refresh_instance(self)
122
123     def refresh(self):
124         """This should be done offline."""
125         self.changed
126         self.hidden
127         self.short_html