from basicauth import logged_in_or_basicauth, factory_decorator
from catalogue.models import Book, Tag
-from search.views import get_search, SearchResult, JVM
+from search.views import Search, SearchResult
from lucene import Term, QueryWrapperFilter, TermQuery
-
+import operator
import logging
import re
{u"href": reverse("opds_authors"),
u"rel": u"start",
u"type": u"application/atom+xml"})
- handler.addQuickElement(u"link", None,
+ handler.addQuickElement(u"link", None,
{u"href": full_url(os.path.join(settings.STATIC_URL, "opensearch.xml")),
u"rel": u"search",
u"type": u"application/opensearchdescription+xml"})
description = u"Wyniki wyszukiwania na stronie WolneLektury.pl"
title = u"Wyniki wyszukiwania"
- INLINE_QUERY_RE = re.compile(r"(author:(?P<author>[^ ]+)|title:(?P<title>[^ ]+)|categories:(?P<categories>[^ ]+)|description:(?P<description>[^ ]+))")
-
+ QUOTE_OR_NOT = r'(?:(?=["])"([^"]+)"|([^ ]+))'
+ INLINE_QUERY_RE = re.compile(
+ r"author:" + QUOTE_OR_NOT +
+ "|translator:" + QUOTE_OR_NOT +
+ "|title:" + QUOTE_OR_NOT +
+ "|categories:" + QUOTE_OR_NOT +
+ "|description:" + QUOTE_OR_NOT +
+ "|text:" + QUOTE_OR_NOT
+ )
+ MATCHES = {
+ 'author': (0, 1),
+ 'translator': (2, 3),
+ 'title': (4, 5),
+ 'categories': (6, 7),
+ 'description': (8, 9),
+ 'text': (10, 11),
+ }
+
+ PARAMS_TO_FIELDS = {
+ 'author': 'authors',
+ 'translator': 'translators',
+ # 'title': 'title',
+ 'categories': 'tag_name_pl',
+ 'description': 'text',
+ # 'text': 'text',
+ }
+
+ ATOM_PLACEHOLDER = re.compile(r"^{(atom|opds):\w+}$")
+
def get_object(self, request):
"""
For OPDS 1.1 We should handle a query for search terms
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).
(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)
- log.info("get_criteria: %s" % e)
- if not e:
- return None
- c = e[0][position]
- log.info("get_criteria: %s" % c)
- if c[0] == '"' and c[-1] == '"':
- c = c[1:-1]
- c = c.replace('+', ' ')
- return c
-
- 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)
+ remains = re.sub(self.INLINE_QUERY_RE, '', query)
+ remains = re.sub(r'[ \t]+', ' ', remains)
+
+ def get_criteria(criteria, name):
+ for c in criteria:
+ for p in self.MATCHES[name]:
+ if c[p]:
+ if p % 2 == 0:
+ return c[p].replace('+', ' ')
+ return c[p]
+ return None
+
+ criteria = dict(map(
+ lambda cn: (cn, get_criteria(inline_criteria, cn)),
+ ['author', 'translator', 'title', 'categories',
+ 'description', 'text']))
+ query = remains
+ # empty query and text set case?
+ log.debug("Inline query = [%s], criteria: %s" % (query, criteria))
else:
- author = request.GET.get('author', '')
- title = request.GET.get('title', '')
- translator = request.GET.get('translator', '')
-
- # Our client didn't handle the opds placeholders
- if author == '{atom:author}': author = ''
- if title == '{atom:title}': title = ''
- if translator == '{atom:contributor}': translator = ''
- categories = None
- fuzzy = False
-
- srch = get_search()
- hint = srch.hint()
-
- # Scenario 1: full search terms provided.
- # Use auxiliarry information to narrow it and make it better.
+ def remove_dump_data(val):
+ """Some clients don't get opds placeholders and just send them."""
+ if self.ATOM_PLACEHOLDER.match(val):
+ return ''
+ return val
+
+ criteria = dict([(cn, remove_dump_data(request.GET.get(cn, '')))
+ for cn in self.MATCHES.keys()])
+ # query is set above.
+ log.debug("Inline query = [%s], criteria: %s" % (query, criteria))
+
+ srch = Search()
+
+ book_hit_filter = srch.index.Q(book_id__any=True)
+ filters = [book_hit_filter] + [srch.index.Q(
+ **{self.PARAMS_TO_FIELDS.get(cn, cn): criteria[cn]}
+ ) for cn in self.MATCHES.keys() if cn in criteria
+ if criteria[cn]]
+
if query:
- filters = []
-
- if author:
- log.info( "narrow to author %s" % author)
- hint.tags(srch.search_tags(srch.get_phrase(srch.get_tokens(author, field='authors'), field='authors'),
- filt=srch.term_filter(Term('tag_category', 'author'))))
-
- if translator:
- log.info( "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:
- log.info( "hint by book title %s" % title)
- q = srch.make_phrase(srch.get_tokens(title, field='title'), field='title')
- hint.books(*srch.search_books(q, filt=flt))
-
- toks = srch.get_tokens(query)
- log.info("tokens for query: %s" % toks)
-
- 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)
- books = []
- for r in results:
- try:
- books.append(r.book)
- except Book.DoesNotExist:
- pass
- log.info("books: %s" % books)
- return books
+ q = srch.index.query(
+ reduce(operator.or_,
+ [srch.index.Q(**{self.PARAMS_TO_FIELDS.get(cn, cn): query})
+ for cn in self.MATCHES.keys()],
+ srch.index.Q()))
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')), filt=flt)
- return books
+ q = srch.index.query(srch.index.Q())
+
+ q = srch.apply_filters(q, filters).field_limit(score=True, fields=['book_id'])
+ results = q.execute()
+
+ book_scores = dict([(r['book_id'], r['score']) for r in results])
+ books = Book.objects.filter(id__in=set([r['book_id'] for r in results]))
+ books = list(books)
+ books.sort(reverse=True, key=lambda book: book_scores[book.id])
+ return books
def get_link(self, query):
return "%s?q=%s" % (reverse('search'), query)
fnp / wolnelektury.git / blobdiff