- return render_to_response('catalogue/book_text.html', {'book': book,}, context_instance=RequestContext(request))
-
-
-# ==========
-# = Search =
-# ==========
-
-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',
- u'ą': u'ąĄ', u'ć': u'ćĆ', u'ę': u'ęĘ', u'ł': u'łŁ', u'ń': u'ńŃ', u'ó': u'óÓ', u'ś': u'śŚ', u'ź': u'źŹ',
- u'ż': u'żŻ'
- }
-
- def repl(m):
- l = m.group()
- return u"(%s)" % '|'.join(names[l])
-
- return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)
-
-
-def unicode_re_escape(query):
- """ Unicode-friendly version of re.escape """
- return re.sub(r'(?u)(\W)', r'\\\1', query)
-
-
-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),
- # but we want both `xy` and `(xy` to catch `(xyz)`
- kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
-
- return Q(**kwargs)
-
-
-def _word_starts_with_regexp(prefix):
- prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
- return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
-
-
-def _sqlite_word_starts_with(name, prefix):
- """ version of _word_starts_with for SQLite
-
- SQLite in Django uses Python re module
- """
- kwargs = {'%s__iregex' % name: _word_starts_with_regexp(prefix)}
- return Q(**kwargs)
-
-
-if hasattr(settings, 'DATABASES'):
- if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
- _word_starts_with = _sqlite_word_starts_with
-elif settings.DATABASE_ENGINE == 'sqlite3':
- _word_starts_with = _sqlite_word_starts_with
-
-
-class App:
- def __init__(self, name, view):
- self.name = name
- self._view = view
- self.lower = name.lower()
- self.category = 'application'
-
- def view(self):
- return reverse(*self._view)
-
-_apps = (
- App(u'Leśmianator', (u'lesmianator', )),
- )
-
-
-def _tags_starting_with(prefix, user=None):
- prefix = prefix.lower()
- # PD counter
- book_stubs = BookStub.objects.filter(_word_starts_with('title', prefix))
- authors = Author.objects.filter(_word_starts_with('name', prefix))
-
- books = Book.objects.filter(_word_starts_with('title', prefix))
- tags = Tag.objects.filter(_word_starts_with('name', prefix))
- if user and user.is_authenticated():
- tags = tags.filter(~Q(category='set') | Q(user=user))
- else:
- tags = tags.exclude(category='set')
-
- prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
- return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + \
- list(authors)
-
-
-def _get_result_link(match, tag_list):
- if isinstance(match, Tag):
- return reverse('catalogue.views.tagged_object_list',
- kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])})
- elif isinstance(match, App):
- return match.view()
- else:
- return match.get_absolute_url()
-
-
-def _get_result_type(match):
- if isinstance(match, Book) or isinstance(match, BookStub):
- match_type = 'book'
- else:
- match_type = match.category
- return match_type
-
-
-def books_starting_with(prefix):
- prefix = prefix.lower()
- return Book.objects.filter(_word_starts_with('title', prefix))
-
-
-def find_best_matches(query, user=None):
- """ Finds a Book, Tag, BookStub or Author 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.
- """
-
- query = query.lower()
- if len(query) < 2:
- raise ValueError("query must have at least two characters")
-
- result = tuple(_tags_starting_with(query, user))
- # remove pdcounter stuff
- book_titles = set(match.pretty_title().lower() for match in result
- if isinstance(match, Book))
- authors = set(match.name.lower() for match in result
- if isinstance(match, Tag) and match.category == 'author')
- result = tuple(res for res in result if not (
- (isinstance(res, BookStub) and res.pretty_title().lower() in book_titles) or
- (isinstance(res, Author) and res.name.lower() in authors)
- ))
fnp / wolnelektury.git / blobdiff