import pprint
import traceback
import re
+import itertools
+from operator import itemgetter
from django.conf import settings
from django.template import RequestContext
context_instance=RequestContext(request))
-def tagged_object_list(request, tags=''):
- # Prevent DoS attacks on our database
- if len(tags.split('/')) > 6:
- raise Http404
+def differentiate_tags(request, tags, ambiguous_slugs):
+ beginning = '/'.join(tag.url_chunk for tag in tags)
+ unparsed = '/'.join(ambiguous_slugs[1:])
+ options = []
+ for tag in models.Tag.objects.exclude(category='book').filter(slug=ambiguous_slugs[0]):
+ options.append({
+ 'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
+ 'tags': [tag]
+ })
+ return render_to_response('catalogue/differentiate_tags.html',
+ {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]},
+ context_instance=RequestContext(request))
+
+def tagged_object_list(request, tags=''):
try:
tags = models.Tag.get_tag_list(tags)
except models.Tag.DoesNotExist:
raise Http404
+ except models.Tag.MultipleObjectsReturned, e:
+ return differentiate_tags(request, e.tags, e.ambiguous_slugs)
+
+ try:
+ if len(tags) > settings.MAX_TAG_LIST:
+ raise Http404
+ except AttributeError:
+ pass
if len([tag for tag in tags if tag.category == 'book']):
raise Http404
if shelf_tags:
books = models.Book.tagged.with_all(shelf_tags).order_by()
- l_tags = [models.Tag.objects.get(slug='l-' + book.slug) for book in books]
+ l_tags = [book.book_tag() for book in books]
fragments = models.Fragment.tagged.with_any(l_tags, fragments)
# newtagging goes crazy if we just try:
- #related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True,
+ #related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True,
# extra={'where': ["catalogue_tag.category != 'book'"]})
fragment_keys = [fragment.pk for fragment in fragments]
if fragment_keys:
objects = fragments
else:
- books = models.Book.tagged.with_all(tags).order_by()
- l_tags = [models.Tag.objects.get(slug='l-' + book.slug) for book in books]
- book_keys = [book.pk for book in books]
- # newtagging goes crazy if we just try:
- #related_tags = models.Tag.objects.usage_for_queryset(books, counts=True,
- # extra={'where': ["catalogue_tag.category NOT IN ('set', 'book', 'theme')"]})
- if book_keys:
- related_tags = models.Book.tags.usage(counts=True,
- filters={'pk__in': book_keys},
- extra={'where': ["catalogue_tag.category NOT IN ('set', 'book', 'theme')"]})
- categories = split_tags(related_tags)
-
- fragment_keys = [fragment.pk for fragment in models.Fragment.tagged.with_any(l_tags)]
- if fragment_keys:
- categories['theme'] = models.Fragment.tags.usage(counts=True,
- filters={'pk__in': fragment_keys},
- extra={'where': ["catalogue_tag.category = 'theme'"]})
-
- books = books.exclude(parent__in=book_keys)
- objects = books
+ # get relevant books and their tags
+ objects = models.Book.tagged.with_all(tags).order_by()
+ l_tags = [book.book_tag() for book in objects]
+ # eliminate descendants
+ descendants_keys = [book.pk for book in models.Book.tagged.with_any(l_tags)]
+ if descendants_keys:
+ objects = objects.exclude(pk__in=descendants_keys)
+
+ # get related tags from `tag_counter` and `theme_counter`
+ related_counts = {}
+ tags_pks = [tag.pk for tag in tags]
+ for book in objects:
+ for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()):
+ if tag_pk in tags_pks:
+ continue
+ related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
+ related_tags = models.Tag.objects.filter(pk__in=related_counts.keys())
+ related_tags = [tag for tag in related_tags if tag not in tags]
+ for tag in related_tags:
+ tag.count = related_counts[tag.pk]
+
+ categories = split_tags(related_tags)
+ del related_tags
if not objects:
only_author = len(tags) == 1 and tags[0].category == 'author'
def book_fragments(request, book_slug, theme_slug):
book = get_object_or_404(models.Book, slug=book_slug)
- book_tag = get_object_or_404(models.Tag, slug='l-' + book_slug)
- theme = get_object_or_404(models.Tag, slug=theme_slug)
+ book_tag = get_object_or_404(models.Tag, slug='l-' + book_slug, category='book')
+ theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme')
fragments = models.Fragment.tagged.with_all([book_tag, theme])
form = forms.SearchForm()
except models.Book.DoesNotExist:
return book_stub_detail(request, slug)
- book_tag = get_object_or_404(models.Tag, slug='l-' + slug)
+ book_tag = book.book_tag()
tags = list(book.tags.filter(~Q(category='set')))
categories = split_tags(tags)
book_children = book.children.all().order_by('parent_number')
def _no_diacritics_regexp(query):
""" returns a regexp for searching for a query without diacritics
-
+
should be locale-aware """
names = {
u'a':u'aąĄ', u'c':u'cćĆ', u'e':u'eęĘ', u'l': u'lłŁ', u'n':u'nńŃ', u'o':u'oóÓ', u's':u'sśŚ', u'z':u'zźżŹŻ',
def _word_starts_with(name, prefix):
"""returns a Q object getting models having `name` contain a word
starting with `prefix`
-
+
We define word characters as alphanumeric and underscore, like in JS.
-
+
Works for MySQL, PostgreSQL, Oracle.
For SQLite, _sqlite* version is substituted for this.
"""
kwargs = {}
prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
- # can't use [[:<:]] (word start),
+ # can't use [[:<:]] (word start),
# but we want both `xy` and `(xy` to catch `(xyz)`
kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
def _sqlite_word_starts_with(name, prefix):
- """ version of _word_starts_with for SQLite
-
+ """ version of _word_starts_with for SQLite
+
SQLite in Django uses Python re module
"""
kwargs = {}
return match.get_absolute_url()
else:
return reverse('catalogue.views.tagged_object_list',
- kwargs={'tags': '/'.join(tag.slug for tag in tag_list + [match])}
+ kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
)
def _get_result_type(match):
def find_best_matches(query, user=None):
""" Finds a Book, Tag or Bookstub best matching a query.
-
+
Returns a with:
- zero elements when nothing is found,
- one element when a best result is found,
- more then one element on multiple exact matches
-
+
Raises a ValueError on too short a query.
"""
return HttpResponse('\n'.join(tag.name for tag in _tags_starting_with(prefix, request.user)))
-
# ====================
# = Shelf management =
# ====================
""""
Create a ZIP archive on disk and transmit it in chunks of 8KB,
without loading the whole file into memory. A similar approach can
- be used for large dynamic PDF files.
+ be used for large dynamic PDF files.
"""
shelf = get_object_or_404(models.Tag, slug=slug, category='set')
if form.is_valid():
formats = form.cleaned_data['formats']
if len(formats) == 0:
- formats = ['pdf', 'odt', 'txt', 'mp3', 'ogg']
+ formats = ['pdf', 'epub', 'odt', 'txt', 'mp3', 'ogg']
# Create a ZIP archive
temp = tempfile.TemporaryFile()
if 'pdf' in formats and book.pdf_file:
filename = book.pdf_file.path
archive.write(filename, str('%s.pdf' % book.slug))
+ if 'epub' in formats and book.epub_file:
+ filename = book.epub_file.path
+ archive.write(filename, str('%s.epub' % book.slug))
if 'odt' in formats and book.odt_file:
filename = book.odt_file.path
archive.write(filename, str('%s.odt' % book.slug))
"""
shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
- formats = {'pdf': False, 'odt': False, 'txt': False, 'mp3': False, 'ogg': False}
+ formats = {'pdf': False, 'epub': False, 'odt': False, 'txt': False, 'mp3': False, 'ogg': False}
for book in collect_books(models.Book.tagged.with_all(shelf)):
if book.pdf_file:
formats['pdf'] = True
+ if book.epub_file:
+ formats['epub'] = True
if book.odt_file:
formats['odt'] = True
if book.txt_file:
fnp / wolnelektury.git / blobdiff