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fix for variable displacement
[wolnelektury.git] / apps / opds / views.py
diff --git a/apps/opds/views.py b/apps/opds/views.py
index 5233570..1367125 100644 (file)
--- a/apps/opds/views.py
+++ b/apps/opds/views.py
@@ -2,7 +2,6 @@
 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
-from base64 import b64encode
 import os.path
 from urlparse import urljoin
 
 import os.path
 from urlparse import urljoin
 
@@ -16,9 +15,16 @@ from django.contrib.sites.models import Site
 
 from basicauth import logged_in_or_basicauth, factory_decorator
 from catalogue.models import Book, Tag
 
 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.views import get_search, SearchResult, JVM
+from lucene import Term, QueryWrapperFilter, TermQuery
+
+import logging
+import re
+
+log = logging.getLogger('opds')
+
+from stats.utils import piwik_track
 
 _root_feeds = (
     {
 
 _root_feeds = (
     {
@@ -182,19 +188,19 @@ class AcquisitionFeed(Feed):
             return u''
 
     def item_enclosure_url(self, book):
             return u''
 
     def item_enclosure_url(self, book):
-        return full_url(book.root_ancestor.epub_file.url)
+        return full_url(book.epub_file.url) if book.epub_file else None
 
     def item_enclosure_length(self, book):
 
     def item_enclosure_length(self, book):
-        return book.root_ancestor.epub_file.size
+        return book.epub_file.size if book.epub_file else None
 
 @piwik_track
 class RootFeed(Feed):
     feed_type = OPDSFeed
     title = u'Wolne Lektury'
 
 @piwik_track
 class RootFeed(Feed):
     feed_type = OPDSFeed
     title = u'Wolne Lektury'
-    link = u'http://www.wolnelektury.pl/'
+    link = u'http://wolnelektury.pl/'
     description = u"Spis utworów na stronie http://WolneLektury.pl"
     author_name = u"Wolne Lektury"
     description = u"Spis utworów na stronie http://WolneLektury.pl"
     author_name = u"Wolne Lektury"
-    author_link = u"http://www.wolnelektury.pl/"
+    author_link = u"http://wolnelektury.pl/"
 
     def items(self):
         return _root_feeds
 
     def items(self):
         return _root_feeds
@@ -211,10 +217,10 @@ class RootFeed(Feed):
 @piwik_track
 class ByCategoryFeed(Feed):
     feed_type = OPDSFeed
 @piwik_track
 class ByCategoryFeed(Feed):
     feed_type = OPDSFeed
-    link = u'http://www.wolnelektury.pl/'
+    link = u'http://wolnelektury.pl/'
     description = u"Spis utworów na stronie http://WolneLektury.pl"
     author_name = u"Wolne Lektury"
     description = u"Spis utworów na stronie http://WolneLektury.pl"
     author_name = u"Wolne Lektury"
-    author_link = u"http://www.wolnelektury.pl/"
+    author_link = u"http://wolnelektury.pl/"
 
     def get_object(self, request, category):
         feed = [feed for feed in _root_feeds if feed['category']==category]
 
     def get_object(self, request, category):
         feed = [feed for feed in _root_feeds if feed['category']==category]
@@ -229,7 +235,7 @@ class ByCategoryFeed(Feed):
         return feed['title']
 
     def items(self, 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
 
     def item_title(self, item):
         return item.name
@@ -256,7 +262,7 @@ class ByTagFeed(AcquisitionFeed):
 
     def items(self, tag):
         books = Book.tagged.with_any([tag])
 
     def items(self, tag):
         books = Book.tagged.with_any([tag])
-        l_tags = Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in books])
+        l_tags = Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in books.iterator()])
         descendants_keys = [book.pk for book in Book.tagged.with_any(l_tags)]
         if descendants_keys:
             books = books.exclude(pk__in=descendants_keys)
         descendants_keys = [book.pk for book in Book.tagged.with_any(l_tags)]
         if descendants_keys:
             books = books.exclude(pk__in=descendants_keys)
@@ -271,7 +277,7 @@ class UserFeed(Feed):
     link = u'http://www.wolnelektury.pl/'
     description = u"Półki użytkownika na stronie http://WolneLektury.pl"
     author_name = u"Wolne Lektury"
     link = u'http://www.wolnelektury.pl/'
     description = u"Półki użytkownika na stronie http://WolneLektury.pl"
     author_name = u"Wolne Lektury"
-    author_link = u"http://www.wolnelektury.pl/"
+    author_link = u"http://wolnelektury.pl/"
 
     def get_object(self, request):
         return request.user
 
     def get_object(self, request):
         return request.user
@@ -280,7 +286,7 @@ class UserFeed(Feed):
         return u"Półki użytkownika %s" % user.username
 
     def items(self, user):
         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
 
     def item_title(self, item):
         return item.name
@@ -316,20 +322,135 @@ class UserSetFeed(AcquisitionFeed):
 # no class decorators in python 2.5
 #UserSetFeed = factory_decorator(logged_in_or_basicauth())(UserSetFeed)
 
 # 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"
 @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<author>[^ ]+)|title:(?P<title>[^ ]+)|categories:(?P<categories>[^ ]+)|description:(?P<description>[^ ]+))")
     
     def get_object(self, request):
     
     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)
+                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)
+        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.
+        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
+        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
 
     def get_link(self, query):
 
     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:
         try:
-            return books_starting_with(query)
+            return books
         except ValueError:
             # too short a query
             return []
         except ValueError:
             # too short a query
             return []