--- /dev/null
+# -*- coding: utf-8 -*-
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+from django.contrib.auth.models import User
+from django.db import models
+from django.db.models import permalink
+from django.utils.translation import ugettext_lazy as _
+from newtagging.models import TagBase
+
+
+# Those are hard-coded here so that makemessages sees them.
+TAG_CATEGORIES = (
+ ('author', _('author')),
+ ('epoch', _('epoch')),
+ ('kind', _('kind')),
+ ('genre', _('genre')),
+ ('theme', _('theme')),
+ ('set', _('set')),
+ ('book', _('book')),
+)
+
+
+class Tag(TagBase):
+ """A tag attachable to books and fragments (and possibly anything).
+
+ Used to represent searchable metadata (authors, epochs, genres, kinds),
+ fragment themes (motifs) and some book hierarchy related kludges."""
+ name = models.CharField(_('name'), max_length=50, db_index=True)
+ slug = models.SlugField(_('slug'), max_length=120, db_index=True)
+ sort_key = models.CharField(_('sort key'), max_length=120, db_index=True)
+ category = models.CharField(_('category'), max_length=50, blank=False, null=False,
+ db_index=True, choices=TAG_CATEGORIES)
+ description = models.TextField(_('description'), blank=True)
+
+ user = models.ForeignKey(User, blank=True, 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',
+ 'rodzaj': 'kind',
+ 'gatunek': 'genre',
+ 'motyw': 'theme',
+ 'polka': 'set',
+ }
+ categories_dict = dict((item[::-1] for item in categories_rev.iteritems()))
+
+ class Meta:
+ ordering = ('sort_key',)
+ verbose_name = _('tag')
+ verbose_name_plural = _('tags')
+ unique_together = (("slug", "category"),)
+ app_label = 'catalogue'
+
+ def __unicode__(self):
+ return self.name
+
+ def __repr__(self):
+ return "Tag(slug=%r)" % self.slug
+
+ @permalink
+ def get_absolute_url(self):
+ return ('catalogue.views.tagged_object_list', [self.url_chunk])
+
+ def has_description(self):
+ return len(self.description) > 0
+ has_description.short_description = _('description')
+ has_description.boolean = True
+
+ def get_count(self):
+ """Returns global book count for book tags, fragment count for themes."""
+ from catalogue.models import Book, Fragment
+
+ if self.category == 'book':
+ # never used
+ objects = Book.objects.none()
+ elif self.category == 'theme':
+ objects = Fragment.tagged.with_all((self,))
+ else:
+ objects = Book.tagged.with_all((self,)).order_by()
+ if self.category != 'set':
+ # eliminate descendants
+ l_tags = Tag.objects.filter(slug__in=[book.book_tag_slug() for book in objects.iterator()])
+ descendants_keys = [book.pk for book in Book.tagged.with_any(l_tags).iterator()]
+ if descendants_keys:
+ objects = objects.exclude(pk__in=descendants_keys)
+ return objects.count()
+
+ @staticmethod
+ def get_tag_list(tags):
+ if isinstance(tags, basestring):
+ real_tags = []
+ ambiguous_slugs = []
+ category = None
+ deprecated = False
+ tags_splitted = tags.split('/')
+ 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:
+ 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
+ raise Tag.DoesNotExist()
+ if ambiguous_slugs:
+ # some tags should be qualified
+ e = Tag.MultipleObjectsReturned()
+ e.tags = real_tags
+ e.ambiguous_slugs = ambiguous_slugs
+ raise e
+ if deprecated:
+ e = Tag.UrlDeprecationWarning()
+ e.tags = real_tags
+ raise e
+ return real_tags
+ else:
+ return TagBase.get_tag_list(tags)
+
+ @property
+ def url_chunk(self):
+ return '/'.join((Tag.categories_dict[self.category], self.slug))
+
+ @staticmethod
+ def tags_from_info(info):
+ from slughifi import slughifi
+ from sortify import sortify
+ meta_tags = []
+ categories = (('kinds', 'kind'), ('genres', 'genre'), ('authors', 'author'), ('epochs', 'epoch'))
+ for field_name, category in categories:
+ try:
+ tag_names = getattr(info, field_name)
+ except:
+ try:
+ tag_names = [getattr(info, category)]
+ except:
+ # For instance, Pictures do not have 'genre' field.
+ continue
+ for tag_name in tag_names:
+ tag_sort_key = tag_name
+ if category == 'author':
+ tag_sort_key = tag_name.last_name
+ tag_name = tag_name.readable()
+ tag, created = Tag.objects.get_or_create(slug=slughifi(tag_name), category=category)
+ if created:
+ tag.name = tag_name
+ tag.sort_key = sortify(tag_sort_key.lower())
+ tag.save()
+ meta_tags.append(tag)
+ return meta_tags
fnp / wolnelektury.git / blobdiff