X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/849f19a3c55d9846b7b671ce516b0934b62777b5..c98667831998d0467830537bb8c83d9e0df534a3:/apps/opds/views.py diff --git a/apps/opds/views.py b/apps/opds/views.py index 52335709b..dc094bba7 100644 --- a/apps/opds/views.py +++ b/apps/opds/views.py @@ -5,6 +5,7 @@ from base64 import b64encode import os.path from urlparse import urljoin +from urllib2 import unquote from django.contrib.syndication.views import Feed from django.core.urlresolvers import reverse @@ -16,9 +17,13 @@ from django.contrib.sites.models import Site from basicauth import logged_in_or_basicauth, factory_decorator from catalogue.models import Book, Tag -from catalogue.views import books_starting_with -from opds.utils import piwik_track +from search import Search, SearchResult, JVM +from lucene import Term, QueryWrapperFilter, TermQuery + +import re + +from stats.utils import piwik_track _root_feeds = ( { @@ -229,7 +234,7 @@ class ByCategoryFeed(Feed): return feed['title'] def items(self, feed): - return (tag for tag in Tag.objects.filter(category=feed['category']) if tag.get_count() > 0) + return Tag.objects.filter(category=feed['category']).exclude(book_count=0) def item_title(self, item): return item.name @@ -280,7 +285,7 @@ class UserFeed(Feed): return u"Półki użytkownika %s" % user.username def items(self, user): - return (tag for tag in Tag.objects.filter(category='set', user=user) if tag.get_count() > 0) + return Tag.objects.filter(category='set', user=user).exclude(book_count=0) def item_title(self, item): return item.name @@ -316,20 +321,124 @@ class UserSetFeed(AcquisitionFeed): # no class decorators in python 2.5 #UserSetFeed = factory_decorator(logged_in_or_basicauth())(UserSetFeed) + @piwik_track class SearchFeed(AcquisitionFeed): description = u"Wyniki wyszukiwania na stronie WolneLektury.pl" title = u"Wyniki wyszukiwania" + + INLINE_QUERY_RE = re.compile(r"(author:(?P[^ ]+)|title:(?P[^ ]+)|categories:(?P<categories>[^ ]+)|description:(?P<description>[^ ]+))") def get_object(self, request): - return request.GET.get('q', '') + """ + For OPDS 1.1 We should handle a query for search terms + and criteria provided either as opensearch or 'inline' query. + OpenSearch defines fields: atom:author, atom:contributor (treated as translator), + atom:title. Inline query provides author, title, categories (treated as book tags), + description (treated as content search terms). + + if search terms are provided, we shall search for books + according to Hint information (from author & contributror & title). + + but if search terms are empty, we should do a different search + (perhaps for is_book=True) + + """ + JVM.attachCurrentThread() + + query = request.GET.get('q', '') + + inline_criteria = re.findall(self.INLINE_QUERY_RE, query) + if inline_criteria: + def get_criteria(criteria, name, position): + e = filter(lambda el: el[0][0:len(name)] == name, criteria) + print e + if not e: + return None + c = e[0][position] + print c + if c[0] == '"' and c[-1] == '"': + c = c[1:-1] + c = c.replace('+', ' ') + return c + + #import pdb; pdb.set_trace() + author = get_criteria(inline_criteria, 'author', 1) + title = get_criteria(inline_criteria, 'title', 2) + translator = None + categories = get_criteria(inline_criteria, 'categories', 3) + query = get_criteria(inline_criteria, 'description', 4) + else: + author = request.GET.get('author', '') + title = request.GET.get('title', '') + translator = request.GET.get('translator', '') + categories = None + fuzzy = False + + + srch = Search() + hint = srch.hint() + + # Scenario 1: full search terms provided. + # Use auxiliarry information to narrow it and make it better. + if query: + filters = [] + + if author: + print "narrow to author %s" % author + hint.tags(srch.search_tags(author, filter=srch.term_filter(Term('tag_category', 'author')))) + + if translator: + print "filter by translator %s" % translator + filters.append(QueryWrapperFilter( + srch.make_phrase(srch.get_tokens(translator, field='translators'), + field='translators'))) + + if categories: + filters.append(QueryWrapperFilter( + srch.make_phrase(srch.get_tokens(categories, field="tag_name_pl"), + field='tag_name_pl'))) + + flt = srch.chain_filters(filters) + if title: + print "hint by book title %s" % title + q = srch.make_phrase(srch.get_tokens(title, field='title'), field='title') + hint.books(*srch.search_books(q, filter=flt)) + + toks = srch.get_tokens(query) + print "tokens: %s" % toks + # import pdb; pdb.set_trace() + results = SearchResult.aggregate(srch.search_perfect_book(toks, fuzzy=fuzzy, hint=hint), + srch.search_perfect_parts(toks, fuzzy=fuzzy, hint=hint), + srch.search_everywhere(toks, fuzzy=fuzzy, hint=hint)) + results.sort(reverse=True) + return [r.book for r in results] + else: + # Scenario 2: since we no longer have to figure out what the query term means to the user, + # we can just use filters and not the Hint class. + filters = [] + + fields = { + 'author': author, + 'translators': translator, + 'title': title + } + + for fld, q in fields.items(): + if q: + filters.append(QueryWrapperFilter( + srch.make_phrase(srch.get_tokens(q, field=fld), field=fld))) + + flt = srch.chain_filters(filters) + books = srch.search_books(TermQuery(Term('is_book', 'true')), filter=flt) + return books def get_link(self, query): - return "%s?q=%s" % (reverse('search'), query) + return "%s?q=%s" % (reverse('search'), query) - def items(self, query): + def items(self, books): try: - return books_starting_with(query) + return books except ValueError: # too short a query return []