from librarian.parser import WLDocument
from lxml import etree
import catalogue.models
+import picture.models
from pdcounter.models import Author as PDCounterAuthor, BookStub as PDCounterBook
from itertools import chain
import sunburnt
log = logging.getLogger('search')
+if os.path.isfile(settings.SOLR_STOPWORDS):
+ stopwords = set(
+ line.decode('utf-8').strip()
+ for line in open(settings.SOLR_STOPWORDS) if not line.startswith('#'))
+else:
+ stopwords = set()
+
class SolrIndex(object):
def __init__(self, mode=None):
book_info = dcparser.parse(open(book.xml_file.path))
fields['slug'] = book.slug
- fields['tags'] = [t.name for t in book.tags]
fields['is_book'] = True
# validator, name
finally:
snippets.close()
+ def remove_picture(self, picture_or_id):
+ """Removes a picture from search index."""
+ if isinstance(picture_or_id, picture.models.Picture):
+ picture_id = picture_or_id.id
+ else:
+ picture_id = picture_or_id
+ self.delete_query(self.index.Q(picture_id=picture_id))
+
+ def index_picture(self, picture, picture_info=None, overwrite=True):
+ """
+ Indexes the picture.
+ Creates a lucene document for extracted metadata
+ and calls self.index_area() to index the contents of the picture.
+ """
+ if overwrite:
+ # we don't remove snippets, since they might be still needed by
+ # threads using not reopened index
+ self.remove_picture(picture)
+
+ picture_doc = {'picture_id': int(picture.id)}
+ meta_fields = self.extract_metadata(picture, picture_info, dc_only=[
+ 'authors', 'title', 'epochs', 'kinds', 'genres'])
+
+ picture_doc.update(meta_fields)
+
+ picture_doc['uid'] = "picture%s" % picture_doc['picture_id']
+ self.index.add(picture_doc)
+ del picture_doc['is_book']
+ for area in picture.areas.all():
+ self.index_area(area, picture_fields=picture_doc)
+
+ def index_area(self, area, picture_fields):
+ """
+ Indexes themes and objects on the area.
+ """
+ doc = dict(picture_fields)
+ doc['area_id'] = area.id
+ doc['themes'] = list(area.tags.filter(category__in=('theme', 'thing')).values_list('name', flat=True))
+ doc['uid'] = 'area%s' % area.id
+ self.index.add(doc)
+
class SearchResult(object):
def __init__(self, doc, how_found=None, query_terms=None):
self._hits.append(hit)
+ @classmethod
+ def from_book(cls, book, how_found=None, query_terms=None):
+ doc = {
+ 'score': book.popularity.count,
+ 'book_id': book.id,
+ 'published_date': 0,
+ }
+ result = cls(doc, how_found=how_found, query_terms=query_terms)
+ result._book = book
+ return result
+
def __unicode__(self):
return u"<SR id=%d %d(%d) hits score=%f %d snippets>" % \
(self.book_id, len(self._hits),
def merge(self, other):
if self.book_id != other.book_id:
- raise ValueError("this search result is or book %d; tried to merge with %d" % (self.book_id, other.book_id))
+ raise ValueError("this search result is for book %d; tried to merge with %d" % (self.book_id, other.book_id))
self._hits += other._hits
- if other.score > self.score:
- self._score = other._score
+ self._score += max(other._score, 0)
return self
def get_book(self):
return None
+class PictureResult(object):
+ def __init__(self, doc, how_found=None, query_terms=None):
+ self.boost = 1.0
+ self.query_terms = query_terms
+ self._picture = None
+ self._hits = []
+ self._processed_hits = None
+
+ if 'score' in doc:
+ self._score = doc['score']
+ else:
+ self._score = 0
+
+ self.picture_id = int(doc["picture_id"])
+
+ if doc.get('area_id'):
+ hit = (self._score, {
+ 'how_found': how_found,
+ 'area_id': doc['area_id'],
+ 'themes': doc.get('themes', []),
+ 'themes_pl': doc.get('themes_pl', []),
+ })
+
+ self._hits.append(hit)
+
+ def __unicode__(self):
+ return u"<PR id=%d score=%f >" % (self.picture_id, self._score)
+
+ def __repr__(self):
+ return unicode(self)
+
+ @property
+ def score(self):
+ return self._score * self.boost
+
+ def merge(self, other):
+ if self.picture_id != other.picture_id:
+ raise ValueError(
+ "this search result is for picture %d; tried to merge with %d" % (self.picture_id, other.picture_id))
+ self._hits += other._hits
+ self._score += max(other._score, 0)
+ return self
+
+ SCORE = 0
+ OTHER = 1
+
+ @property
+ def hits(self):
+ if self._processed_hits is not None:
+ return self._processed_hits
+
+ hits = []
+ for hit in self._hits:
+ try:
+ area = picture.models.PictureArea.objects.get(id=hit[self.OTHER]['area_id'])
+ except picture.models.PictureArea.DoesNotExist:
+ # stale index
+ continue
+ # Figure out if we were searching for a token matching some word in theme name.
+ themes_hit = set()
+ if self.query_terms is not None:
+ for i in range(0, len(hit[self.OTHER]['themes'])):
+ tms = hit[self.OTHER]['themes'][i].split(r' +') + hit[self.OTHER]['themes_pl'][i].split(' ')
+ tms = map(unicode.lower, tms)
+ for qt in self.query_terms:
+ if qt in tms:
+ themes_hit.add(hit[self.OTHER]['themes'][i])
+ break
+
+ m = {
+ 'score': hit[self.SCORE],
+ 'area': area,
+ 'themes_hit': themes_hit,
+ }
+ m.update(hit[self.OTHER])
+ hits.append(m)
+
+ hits.sort(key=lambda h: h['score'], reverse=True)
+ hits = hits[:1]
+ self._processed_hits = hits
+ return hits
+
+ def get_picture(self):
+ if self._picture is None:
+ self._picture = picture.models.Picture.objects.get(id=self.picture_id)
+ return self._picture
+
+ picture = property(get_picture)
+
+ @staticmethod
+ def aggregate(*result_lists):
+ books = {}
+ for rl in result_lists:
+ for r in rl:
+ if r.picture_id in books:
+ books[r.picture_id].merge(r)
+ else:
+ books[r.picture_id] = r
+ return books.values()
+
+ def __cmp__(self, other):
+ return cmp(self.score, other.score)
+
+
class Search(SolrIndex):
"""
Search facilities.
return q
- def search_words(self, words, fields, book=True):
+ def search_by_author(self, words):
+ from catalogue.models import Book
+ books = Book.objects.filter(parent=None).order_by('-popularity__count')
+ for word in words:
+ books = books.filter(cached_author__iregex='\m%s\M' % word).select_related('popularity__count')
+ return [SearchResult.from_book(book, how_found='search_by_author', query_terms=words) for book in books[:30]]
+
+ def search_words(self, words, fields, required=None, book=True, picture=False):
+ if book and not picture and fields == ['authors']:
+ return self.search_by_author(words)
filters = []
for word in words:
- word_filter = None
- for field in fields:
- q = self.index.Q(**{field: word})
- if word_filter is None:
- word_filter = q
- else:
- word_filter |= q
- filters.append(word_filter)
+ if book or picture or (word not in stopwords):
+ word_filter = None
+ for field in fields:
+ q = self.index.Q(**{field: word})
+ if word_filter is None:
+ word_filter = q
+ else:
+ word_filter |= q
+ filters.append(word_filter)
+ if required:
+ required_filter = None
+ for field in required:
+ for word in words:
+ if book or picture or (word not in stopwords):
+ q = self.index.Q(**{field: word})
+ if required_filter is None:
+ required_filter = q
+ else:
+ required_filter |= q
+ filters.append(required_filter)
+ if not filters:
+ return []
+ params = {}
if book:
- query = self.index.query(is_book=True)
+ params['is_book'] = True
+ if picture:
+ params['picture_id__gt'] = 0
else:
- query = self.index.query()
+ params['book_id__gt'] = 0
+ query = self.index.query(**params)
query = self.apply_filters(query, filters).field_limit(score=True, all_fields=True)
- return [SearchResult(found, how_found='search_words', query_terms=words) for found in query.execute()]
+ result_class = PictureResult if picture else SearchResult
+ return [result_class(found, how_found='search_words', query_terms=words) for found in query.execute()]
def get_snippets(self, searchresult, query, field='text', num=1):
"""
text = snippets.get((int(position),
int(length)))
snip = self.index.highlight(text=text, field=field, q=query)
+ if not snip and field == 'text':
+ snip = self.index.highlight(text=text, field='text_nonstem', q=query)
if snip not in snips:
snips[idx] = snip
if snip:
fnp / wolnelektury.git / blobdiff