X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/dea27f4e683e78d64d7841489ac1059e6a7d98c9..876c24227952faa17eda5d706cb0b3316d5ffe24:/apps/catalogue/models.py
diff --git a/apps/catalogue/models.py b/apps/catalogue/models.py
index 7cc77156d..ead5ba040 100644
--- a/apps/catalogue/models.py
+++ b/apps/catalogue/models.py
@@ -2,25 +2,33 @@
# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
#
+from datetime import datetime
+
from django.db import models
from django.db.models import permalink, Q
+import django.dispatch
+from django.core.cache import cache
from django.utils.translation import ugettext_lazy as _
from django.contrib.auth.models import User
from django.core.files import File
from django.template.loader import render_to_string
-from django.template.defaultfilters import slugify
from django.utils.safestring import mark_safe
from django.utils.translation import get_language
from django.core.urlresolvers import reverse
+from django.db.models.signals import post_save, m2m_changed, pre_delete
from django.conf import settings
from newtagging.models import TagBase, tags_updated
from newtagging import managers
-from catalogue.fields import JSONField
+from catalogue.fields import JSONField, OverwritingFileField
+from catalogue.utils import ExistingFile
from librarian import dcparser, html, epub, NoDublinCore
+import mutagen
from mutagen import id3
+from slughifi import slughifi
+from sortify import sortify
TAG_CATEGORIES = (
@@ -40,6 +48,9 @@ MEDIA_FORMATS = (
('daisy', _('DAISY file')),
)
+# not quite, but Django wants you to set a timeout
+CACHE_FOREVER = 2419200 # 28 days
+
class TagSubcategoryManager(models.Manager):
def __init__(self, subcategory):
super(TagSubcategoryManager, self).__init__()
@@ -59,10 +70,16 @@ class Tag(TagBase):
main_page = models.BooleanField(_('main page'), default=False, db_index=True, help_text=_('Show tag on main page'))
user = models.ForeignKey(User, blank=True, null=True)
- book_count = models.IntegerField(_('book count'), blank=False, null=True)
+ book_count = models.IntegerField(_('book count'), blank=True, null=True)
gazeta_link = models.CharField(blank=True, max_length=240)
wiki_link = models.CharField(blank=True, max_length=240)
+ created_at = models.DateTimeField(_('creation date'), auto_now_add=True, db_index=True)
+ changed_at = models.DateTimeField(_('creation date'), auto_now=True, db_index=True)
+
+ class UrlDeprecationWarning(DeprecationWarning):
+ pass
+
categories_rev = {
'autor': 'author',
'epoka': 'epoch',
@@ -121,19 +138,20 @@ class Tag(TagBase):
real_tags = []
ambiguous_slugs = []
category = None
+ deprecated = False
tags_splitted = tags.split('/')
- for index, name in enumerate(tags_splitted):
- if name in Tag.categories_rev:
+ for name in tags_splitted:
+ if category:
+ real_tags.append(Tag.objects.get(slug=name, category=category))
+ category = None
+ elif name in Tag.categories_rev:
category = Tag.categories_rev[name]
else:
- if category:
- real_tags.append(Tag.objects.get(slug=name, category=category))
- category = None
- else:
- try:
- real_tags.append(Tag.objects.exclude(category='book').get(slug=name))
- except Tag.MultipleObjectsReturned, e:
- ambiguous_slugs.append(name)
+ try:
+ real_tags.append(Tag.objects.exclude(category='book').get(slug=name))
+ deprecated = True
+ except Tag.MultipleObjectsReturned, e:
+ ambiguous_slugs.append(name)
if category:
# something strange left off
@@ -144,8 +162,11 @@ class Tag(TagBase):
e.tags = real_tags
e.ambiguous_slugs = ambiguous_slugs
raise e
- else:
- return real_tags
+ if deprecated:
+ e = Tag.UrlDeprecationWarning()
+ e.tags = real_tags
+ raise e
+ return real_tags
else:
return TagBase.get_tag_list(tags)
@@ -155,24 +176,30 @@ class Tag(TagBase):
# TODO: why is this hard-coded ?
-def book_upload_path(ext=None):
+def book_upload_path(ext=None, maxlen=100):
def get_dynamic_path(media, filename, ext=ext):
# how to put related book's slug here?
if not ext:
- ext = media.type
+ if media.type == 'daisy':
+ ext = 'daisy.zip'
+ else:
+ ext = media.type
if not media.name:
- name = slugify(filename.split(".")[0])
+ name = slughifi(filename.split(".")[0])
else:
- name = slugify(media.name)
- return 'lektura/%s.%s' % (name, ext)
+ name = slughifi(media.name)
+ return 'book/%s/%s.%s' % (ext, name[:maxlen-len('book/%s/.%s' % (ext, ext))-4], ext)
return get_dynamic_path
class BookMedia(models.Model):
type = models.CharField(_('type'), choices=MEDIA_FORMATS, max_length="100")
- name = models.CharField(_('name'), max_length="100", blank=True)
- file = models.FileField(_('file'), upload_to=book_upload_path(), blank=True)
+ name = models.CharField(_('name'), max_length="100")
+ file = OverwritingFileField(_('file'), upload_to=book_upload_path())
uploaded_at = models.DateTimeField(_('creation date'), auto_now_add=True, editable=False)
+ extra_info = JSONField(_('extra information'), default='{}', editable=False)
+ book = models.ForeignKey('Book', related_name='media')
+ source_sha1 = models.CharField(null=True, blank=True, max_length=40, editable=False)
def __unicode__(self):
return "%s (%s)" % (self.name, self.file.name.split("/")[-1])
@@ -182,14 +209,86 @@ class BookMedia(models.Model):
verbose_name = _('book media')
verbose_name_plural = _('book media')
+ def save(self, *args, **kwargs):
+ try:
+ old = BookMedia.objects.get(pk=self.pk)
+ except BookMedia.DoesNotExist, e:
+ pass
+ else:
+ # if name changed, change the file name, too
+ if slughifi(self.name) != slughifi(old.name):
+ self.file.save(None, ExistingFile(self.file.path), save=False, leave=True)
+
+ super(BookMedia, self).save(*args, **kwargs)
+ extra_info = self.get_extra_info_value()
+ extra_info.update(self.read_meta())
+ self.set_extra_info_value(extra_info)
+ self.source_sha1 = self.read_source_sha1(self.file.path, self.type)
+ return super(BookMedia, self).save(*args, **kwargs)
+
+ def read_meta(self):
+ """
+ Reads some metadata from the audiobook.
+ """
+
+ artist_name = director_name = project = funded_by = ''
+ if self.type == 'mp3':
+ try:
+ audio = id3.ID3(self.file.path)
+ artist_name = ', '.join(', '.join(tag.text) for tag in audio.getall('TPE1'))
+ director_name = ', '.join(', '.join(tag.text) for tag in audio.getall('TPE3'))
+ project = ", ".join([t.data for t in audio.getall('PRIV')
+ if t.owner=='wolnelektury.pl?project'])
+ funded_by = ", ".join([t.data for t in audio.getall('PRIV')
+ if t.owner=='wolnelektury.pl?funded_by'])
+ except:
+ pass
+ elif self.type == 'ogg':
+ try:
+ audio = mutagen.File(self.file.path)
+ artist_name = ', '.join(audio.get('artist', []))
+ director_name = ', '.join(audio.get('conductor', []))
+ project = ", ".join(audio.get('project', []))
+ funded_by = ", ".join(audio.get('funded_by', []))
+ except:
+ pass
+ else:
+ return {}
+ return {'artist_name': artist_name, 'director_name': director_name,
+ 'project': project, 'funded_by': funded_by}
+
+ @staticmethod
+ def read_source_sha1(filepath, filetype):
+ """
+ Reads source file SHA1 from audiobok metadata.
+ """
+
+ if filetype == 'mp3':
+ try:
+ audio = id3.ID3(filepath)
+ return [t.data for t in audio.getall('PRIV')
+ if t.owner=='wolnelektury.pl?flac_sha1'][0]
+ except:
+ return None
+ elif filetype == 'ogg':
+ try:
+ audio = mutagen.File(filepath)
+ return audio.get('flac_sha1', [None])[0]
+ except:
+ return None
+ else:
+ return None
+
+
class Book(models.Model):
title = models.CharField(_('title'), max_length=120)
+ sort_key = models.CharField(_('sort_key'), max_length=120, db_index=True, editable=False)
slug = models.SlugField(_('slug'), max_length=120, unique=True, db_index=True)
description = models.TextField(_('description'), blank=True)
- created_at = models.DateTimeField(_('creation date'), auto_now_add=True)
- _short_html = models.TextField(_('short HTML'), editable=False)
+ created_at = models.DateTimeField(_('creation date'), auto_now_add=True, db_index=True)
+ changed_at = models.DateTimeField(_('creation date'), auto_now=True, db_index=True)
parent_number = models.IntegerField(_('parent number'), default=0)
- extra_info = JSONField(_('extra information'))
+ extra_info = JSONField(_('extra information'), default='{}')
gazeta_link = models.CharField(blank=True, max_length=240)
wiki_link = models.CharField(blank=True, max_length=240)
# files generated during publication
@@ -198,48 +297,34 @@ class Book(models.Model):
pdf_file = models.FileField(_('PDF file'), upload_to=book_upload_path('pdf'), blank=True)
epub_file = models.FileField(_('EPUB file'), upload_to=book_upload_path('epub'), blank=True)
txt_file = models.FileField(_('TXT file'), upload_to=book_upload_path('txt'), blank=True)
- # other files
- medias = models.ManyToManyField(BookMedia, blank=True)
-
+
parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
objects = models.Manager()
tagged = managers.ModelTaggedItemManager(Tag)
tags = managers.TagDescriptor(Tag)
- _tag_counter = JSONField(null=True, editable=False)
- _theme_counter = JSONField(null=True, editable=False)
+ html_built = django.dispatch.Signal()
class AlreadyExists(Exception):
pass
class Meta:
- ordering = ('title',)
+ ordering = ('sort_key',)
verbose_name = _('book')
verbose_name_plural = _('books')
def __unicode__(self):
return self.title
- def save(self, force_insert=False, force_update=False, reset_short_html=True, refresh_mp3=True, **kwargs):
+ def save(self, force_insert=False, force_update=False, reset_short_html=True, **kwargs):
+ self.sort_key = sortify(self.title)
+
+ ret = super(Book, self).save(force_insert, force_update)
+
if reset_short_html:
- # Reset _short_html during save
- update = {}
- for key in filter(lambda x: x.startswith('_short_html'), self.__dict__):
- update[key] = ''
- self.__setattr__(key, '')
- # Fragment.short_html relies on book's tags, so reset it here too
- self.fragments.all().update(**update)
-
- book = super(Book, self).save(force_insert, force_update)
-
- if refresh_mp3 and self.has_media('mp3'):
- file = self.get_media('mp3')[0]
- #print file, file.path
- extra_info = self.get_extra_info_value()
- extra_info.update(self.get_mp3_info())
- self.set_extra_info_value(extra_info)
- book = super(Book, self).save(force_insert, force_update)
- return book
+ self.reset_short_html()
+
+ return ret
@permalink
def get_absolute_url(self):
@@ -288,7 +373,7 @@ class Book(models.Model):
else:
return False
else:
- if self.medias.filter(book=self, type=type).count() > 0:
+ if self.media.filter(type=type).exists():
return True
else:
return False
@@ -300,13 +385,13 @@ class Book(models.Model):
elif type == "html":
return self.html_file
elif type == "epub":
- return self.html_file
+ return self.epub_file
elif type == "txt":
return self.txt_file
elif type == "pdf":
return self.pdf_file
else:
- return self.medias.filter(book=self, type=type)
+ return self.media.filter(type=type)
else:
return None
@@ -319,11 +404,25 @@ class Book(models.Model):
def get_daisy(self):
return self.get_media("daisy")
+ def reset_short_html(self):
+ if self.id is None:
+ return
+
+ cache_key = "Book.short_html/%d/%s"
+ for lang, langname in settings.LANGUAGES:
+ cache.delete(cache_key % (self.id, lang))
+ # Fragment.short_html relies on book's tags, so reset it here too
+ for fragm in self.fragments.all():
+ fragm.reset_short_html()
+
def short_html(self):
- key = '_short_html_%s' % get_language()
- short_html = getattr(self, key)
+ if self.id:
+ cache_key = "Book.short_html/%d/%s" % (self.id, get_language())
+ short_html = cache.get(cache_key)
+ else:
+ short_html = None
- if short_html and len(short_html):
+ if short_html is not None:
return mark_safe(short_html)
else:
tags = self.tags.filter(~Q(category__in=('set', 'theme', 'book')))
@@ -337,21 +436,20 @@ class Book(models.Model):
formats.append(u'PDF' % self.get_media('pdf').url)
if self.root_ancestor.has_media("epub"):
formats.append(u'EPUB' % self.root_ancestor.get_media('epub').url)
- if self.has_media("odt"):
- formats.append(u'ODT' % self.get_media('odt').url)
if self.has_media("txt"):
formats.append(u'TXT' % self.get_media('txt').url)
# other files
- for m in self.medias.order_by('type'):
- formats.append(u'%s' % m.type, m.file.url)
+ for m in self.media.order_by('type'):
+ formats.append(u'%s' % (m.file.url, m.type.upper()))
formats = [mark_safe(format) for format in formats]
- setattr(self, key, unicode(render_to_string('catalogue/book_short.html',
- {'book': self, 'tags': tags, 'formats': formats})))
- self.save(reset_short_html=False)
- return mark_safe(getattr(self, key))
+ short_html = unicode(render_to_string('catalogue/book_short.html',
+ {'book': self, 'tags': tags, 'formats': formats}))
+ if self.id:
+ cache.set(cache_key, short_html, CACHE_FOREVER)
+ return mark_safe(short_html)
@property
def root_ancestor(self):
@@ -365,13 +463,6 @@ class Book(models.Model):
return self._root_ancestor
- def get_mp3_info(self):
- """Retrieves artist and director names from audio ID3 tags."""
- audio = id3.ID3(self.get_media('mp3')[0].file.path)
- artist_name = ', '.join(', '.join(tag.text) for tag in audio.getall('TPE1'))
- director_name = ', '.join(', '.join(tag.text) for tag in audio.getall('TPE3'))
- return {'artist_name': artist_name, 'director_name': director_name}
-
def has_description(self):
return len(self.description) > 0
has_description.short_description = _('description')
@@ -388,6 +479,11 @@ class Book(models.Model):
has_epub_file.short_description = 'EPUB'
has_epub_file.boolean = True
+ def has_txt_file(self):
+ return bool(self.txt_file)
+ has_txt_file.short_description = 'HTML'
+ has_txt_file.boolean = True
+
def has_html_file(self):
return bool(self.html_file)
has_html_file.short_description = 'HTML'
@@ -442,9 +538,8 @@ class Book(models.Model):
epub_file = StringIO()
try:
- epub.transform(BookImportDocProvider(self), self.slug, epub_file)
- self.epub_file.save('%s.epub' % self.slug, ContentFile(epub_file.getvalue()), save=False)
- self.save(refresh_mp3=False)
+ epub.transform(BookImportDocProvider(self), self.slug, output_file=epub_file)
+ self.epub_file.save('%s.epub' % self.slug, ContentFile(epub_file.getvalue()))
FileRecord(slug=self.slug, type='epub', sha1=sha1(epub_file.getvalue()).hexdigest()).save()
except NoDublinCore:
pass
@@ -455,12 +550,77 @@ class Book(models.Model):
if remove_descendants and child_book.has_epub_file():
child_book.epub_file.delete()
# save anyway, to refresh short_html
- child_book.save(refresh_mp3=False)
+ child_book.save()
book_descendants += list(child_book.children.all())
+ def build_txt(self):
+ from StringIO import StringIO
+ from django.core.files.base import ContentFile
+ from librarian import text
+
+ out = StringIO()
+ text.transform(open(self.xml_file.path), out)
+ self.txt_file.save('%s.txt' % self.slug, ContentFile(out.getvalue()))
+
+
+ def build_html(self):
+ from tempfile import NamedTemporaryFile
+ from markupstring import MarkupString
+
+ meta_tags = list(self.tags.filter(
+ category__in=('author', 'epoch', 'genre', 'kind')))
+ book_tag = self.book_tag()
+
+ html_file = NamedTemporaryFile()
+ if html.transform(self.xml_file.path, html_file, parse_dublincore=False):
+ self.html_file.save('%s.html' % self.slug, File(html_file))
+
+ # get ancestor l-tags for adding to new fragments
+ ancestor_tags = []
+ p = self.parent
+ while p:
+ ancestor_tags.append(p.book_tag())
+ p = p.parent
+
+ # Delete old fragments and create them from scratch
+ self.fragments.all().delete()
+ # Extract fragments
+ closed_fragments, open_fragments = html.extract_fragments(self.html_file.path)
+ for fragment in closed_fragments.values():
+ try:
+ theme_names = [s.strip() for s in fragment.themes.split(',')]
+ except AttributeError:
+ continue
+ themes = []
+ for theme_name in theme_names:
+ if not theme_name:
+ continue
+ tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name), category='theme')
+ if created:
+ tag.name = theme_name
+ tag.sort_key = theme_name.lower()
+ tag.save()
+ themes.append(tag)
+ if not themes:
+ continue
+
+ text = fragment.to_string()
+ short_text = ''
+ if (len(MarkupString(text)) > 240):
+ short_text = unicode(MarkupString(text)[:160])
+ new_fragment = Fragment.objects.create(anchor=fragment.id, book=self,
+ text=text, short_text=short_text)
+
+ new_fragment.save()
+ new_fragment.tags = set(meta_tags + themes + [book_tag] + ancestor_tags)
+ self.save()
+ self.html_built.send(sender=self)
+ return True
+ return False
+
@classmethod
- def from_xml_file(cls, xml_file, overwrite=False):
+ def from_xml_file(cls, xml_file, **kwargs):
# use librarian to parse meta-data
book_info = dcparser.parse(xml_file)
@@ -468,16 +628,13 @@ class Book(models.Model):
xml_file = File(open(xml_file))
try:
- return cls.from_text_and_meta(xml_file, book_info, overwrite)
+ return cls.from_text_and_meta(xml_file, book_info, **kwargs)
finally:
xml_file.close()
@classmethod
- def from_text_and_meta(cls, raw_file, book_info, overwrite=False):
- from tempfile import NamedTemporaryFile
- from slughifi import slughifi
- from markupstring import MarkupString
- from django.core.files.storage import default_storage
+ def from_text_and_meta(cls, raw_file, book_info, overwrite=False, build_epub=True, build_txt=True):
+ import re
# check for parts before we do anything
children = []
@@ -492,6 +649,8 @@ class Book(models.Model):
# Read book metadata
book_base, book_slug = book_info.url.rsplit('/', 1)
+ if re.search(r'[^a-zA-Z0-9-]', book_slug):
+ raise ValueError('Invalid characters in slug')
book, created = Book.objects.get_or_create(slug=book_slug)
if created:
@@ -504,10 +663,9 @@ class Book(models.Model):
book.title = book_info.title
book.set_extra_info_value(book_info.to_dict())
- book._short_html = ''
book.save()
- book_tags = []
+ meta_tags = []
categories = (('kinds', 'kind'), ('genres', 'genre'), ('authors', 'author'), ('epochs', 'epoch'))
for field_name, category in categories:
try:
@@ -522,11 +680,11 @@ class Book(models.Model):
tag, created = Tag.objects.get_or_create(slug=slughifi(tag_name), category=category)
if created:
tag.name = tag_name
- tag.sort_key = tag_sort_key.lower()
+ tag.sort_key = sortify(tag_sort_key.lower())
tag.save()
- book_tags.append(tag)
+ meta_tags.append(tag)
- book.tags = book_tags + book_shelves
+ book.tags = set(meta_tags + book_shelves)
book_tag = book.book_tag()
@@ -541,49 +699,12 @@ class Book(models.Model):
# delete old fragments when overwriting
book.fragments.all().delete()
- html_file = NamedTemporaryFile()
- if html.transform(book.xml_file.path, html_file, parse_dublincore=False):
- book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
-
- # get ancestor l-tags for adding to new fragments
- ancestor_tags = []
- p = book.parent
- while p:
- ancestor_tags.append(p.book_tag())
- p = p.parent
-
- # Extract fragments
- closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
- for fragment in closed_fragments.values():
- try:
- theme_names = [s.strip() for s in fragment.themes.split(',')]
- except AttributeError:
- continue
- themes = []
- for theme_name in theme_names:
- if not theme_name:
- continue
- tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name), category='theme')
- if created:
- tag.name = theme_name
- tag.sort_key = theme_name.lower()
- tag.save()
- themes.append(tag)
- if not themes:
- continue
+ if book.build_html():
+ if not settings.NO_BUILD_TXT and build_txt:
+ book.build_txt()
- text = fragment.to_string()
- short_text = ''
- if (len(MarkupString(text)) > 240):
- short_text = unicode(MarkupString(text)[:160])
- new_fragment, created = Fragment.objects.get_or_create(anchor=fragment.id, book=book,
- defaults={'text': text, 'short_text': short_text})
-
- new_fragment.save()
- new_fragment.tags = set(book_tags + themes + [book_tag] + ancestor_tags)
-
- if not settings.NO_BUILD_EPUB:
- book.root_ancestor().build_epub()
+ if not settings.NO_BUILD_EPUB and build_epub:
+ book.root_ancestor.build_epub()
book_descendants = list(book.children.all())
# add l-tag to descendants and their fragments
@@ -596,62 +717,109 @@ class Book(models.Model):
fragment.tags = set(list(fragment.tags) + [book_tag])
book_descendants += list(child_book.children.all())
+ book.save()
+
# refresh cache
book.reset_tag_counter()
book.reset_theme_counter()
- book.save()
return book
-
- def refresh_tag_counter(self):
- tags = {}
- for child in self.children.all().order_by():
- for tag_pk, value in child.tag_counter.iteritems():
- tags[tag_pk] = tags.get(tag_pk, 0) + value
- for tag in self.tags.exclude(category__in=('book', 'theme', 'set')).order_by():
- tags[tag.pk] = 1
- self.set__tag_counter_value(tags)
- self.save(reset_short_html=False, refresh_mp3=False)
- return tags
-
def reset_tag_counter(self):
- self._tag_counter = None
- self.save(reset_short_html=False, refresh_mp3=False)
+ if self.id is None:
+ return
+
+ cache_key = "Book.tag_counter/%d" % self.id
+ cache.delete(cache_key)
if self.parent:
self.parent.reset_tag_counter()
@property
def tag_counter(self):
- if self._tag_counter is None:
- return self.refresh_tag_counter()
- return dict((int(k), v) for k, v in self.get__tag_counter_value().iteritems())
-
- def refresh_theme_counter(self):
- tags = {}
- for fragment in Fragment.tagged.with_any([self.book_tag()]).order_by():
- for tag in fragment.tags.filter(category='theme').order_by():
- tags[tag.pk] = tags.get(tag.pk, 0) + 1
- self.set__theme_counter_value(tags)
- self.save(reset_short_html=False, refresh_mp3=False)
+ if self.id:
+ cache_key = "Book.tag_counter/%d" % self.id
+ tags = cache.get(cache_key)
+ else:
+ tags = None
+
+ if tags is None:
+ tags = {}
+ for child in self.children.all().order_by():
+ for tag_pk, value in child.tag_counter.iteritems():
+ tags[tag_pk] = tags.get(tag_pk, 0) + value
+ for tag in self.tags.exclude(category__in=('book', 'theme', 'set')).order_by():
+ tags[tag.pk] = 1
+
+ if self.id:
+ cache.set(cache_key, tags, CACHE_FOREVER)
return tags
def reset_theme_counter(self):
- self._theme_counter = None
- self.save(reset_short_html=False, refresh_mp3=False)
+ if self.id is None:
+ return
+
+ cache_key = "Book.theme_counter/%d" % self.id
+ cache.delete(cache_key)
if self.parent:
self.parent.reset_theme_counter()
@property
def theme_counter(self):
- if self._theme_counter is None:
- return self.refresh_theme_counter()
- return dict((int(k), v) for k, v in self.get__theme_counter_value().iteritems())
+ if self.id:
+ cache_key = "Book.theme_counter/%d" % self.id
+ tags = cache.get(cache_key)
+ else:
+ tags = None
+
+ if tags is None:
+ tags = {}
+ for fragment in Fragment.tagged.with_any([self.book_tag()]).order_by():
+ for tag in fragment.tags.filter(category='theme').order_by():
+ tags[tag.pk] = tags.get(tag.pk, 0) + 1
+
+ if self.id:
+ cache.set(cache_key, tags, CACHE_FOREVER)
+ return tags
+
+ def pretty_title(self, html_links=False):
+ book = self
+ names = list(book.tags.filter(category='author'))
+
+ books = []
+ while book:
+ books.append(book)
+ book = book.parent
+ names.extend(reversed(books))
+
+ if html_links:
+ names = ['%s' % (tag.get_absolute_url(), tag.name) for tag in names]
+ else:
+ names = [tag.name for tag in names]
+
+ return ', '.join(names)
+
+ @classmethod
+ def tagged_top_level(cls, tags):
+ """ Returns top-level books tagged with `tags'.
+
+ It only returns those books which don't have ancestors which are
+ also tagged with those tags.
+
+ """
+ # get relevant books and their tags
+ objects = cls.tagged.with_all(tags)
+ # eliminate descendants
+ l_tags = Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in objects])
+ descendants_keys = [book.pk for book in cls.tagged.with_any(l_tags)]
+ if descendants_keys:
+ objects = objects.exclude(pk__in=descendants_keys)
+
+ return objects
+
class Fragment(models.Model):
text = models.TextField()
short_text = models.TextField(editable=False)
- _short_html = models.TextField(editable=False)
anchor = models.CharField(max_length=120)
book = models.ForeignKey(Book, related_name='fragments')
@@ -667,16 +835,29 @@ class Fragment(models.Model):
def get_absolute_url(self):
return '%s#m%s' % (reverse('book_text', kwargs={'slug': self.book.slug}), self.anchor)
+ def reset_short_html(self):
+ if self.id is None:
+ return
+
+ cache_key = "Fragment.short_html/%d/%s"
+ for lang, langname in settings.LANGUAGES:
+ cache.delete(cache_key % (self.id, lang))
+
def short_html(self):
- key = '_short_html_%s' % get_language()
- short_html = getattr(self, key)
- if short_html and len(short_html):
+ if self.id:
+ cache_key = "Fragment.short_html/%d/%s" % (self.id, get_language())
+ short_html = cache.get(cache_key)
+ else:
+ short_html = None
+
+ if short_html is not None:
return mark_safe(short_html)
else:
- setattr(self, key, unicode(render_to_string('catalogue/fragment_short.html',
- {'fragment': self})))
- self.save()
- return mark_safe(getattr(self, key))
+ short_html = unicode(render_to_string('catalogue/fragment_short.html',
+ {'fragment': self}))
+ if self.id:
+ cache.set(cache_key, short_html, CACHE_FOREVER)
+ return mark_safe(short_html)
class FileRecord(models.Model):
@@ -693,10 +874,17 @@ class FileRecord(models.Model):
def __unicode__(self):
return "%s %s.%s" % (self.sha1, self.slug, self.type)
+###########
+#
+# SIGNALS
+#
+###########
+
def _tags_updated_handler(sender, affected_tags, **kwargs):
# reset tag global counter
- Tag.objects.filter(pk__in=[tag.pk for tag in affected_tags]).update(book_count=None)
+ # we want Tag.changed_at updated for API to know the tag was touched
+ Tag.objects.filter(pk__in=[tag.pk for tag in affected_tags]).update(book_count=None, changed_at=datetime.now())
# if book tags changed, reset book tag counter
if isinstance(sender, Book) and \
@@ -710,3 +898,15 @@ def _tags_updated_handler(sender, affected_tags, **kwargs):
sender.book.reset_theme_counter()
tags_updated.connect(_tags_updated_handler)
+
+def _pre_delete_handler(sender, instance, **kwargs):
+ """ refresh Book on BookMedia delete """
+ if sender == BookMedia:
+ instance.book.save()
+pre_delete.connect(_pre_delete_handler)
+
+def _post_save_handler(sender, instance, **kwargs):
+ """ refresh all the short_html stuff on BookMedia update """
+ if sender == BookMedia:
+ instance.book.save()
+post_save.connect(_post_save_handler)