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[wolnelektury.git] / apps / search / index.py
diff --git a/apps/search/index.py b/apps/search/index.py
index df44888..dc33575 100644 (file)
--- a/apps/search/index.py
+++ b/apps/search/index.py
@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from django.conf import settings
 # -*- coding: utf-8 -*-
 
 from django.conf import settings
-from lucene import SimpleFSDirectory, IndexWriter, CheckIndex, \
+from lucene import SimpleFSDirectory, IndexWriter, IndexWriterConfig, CheckIndex, \
     File, Field, Integer, \
     NumericField, Version, Document, JavaError, IndexSearcher, \
     QueryParser, PerFieldAnalyzerWrapper, \
     File, Field, Integer, \
     NumericField, Version, Document, JavaError, IndexSearcher, \
     QueryParser, PerFieldAnalyzerWrapper, \
@@ -27,6 +27,7 @@ from librarian import dcparser
 from librarian.parser import WLDocument
 from lxml import etree
 import catalogue.models
 from librarian.parser import WLDocument
 from lxml import etree
 import catalogue.models
+from pdcounter.models import Author as PDCounterAuthor, BookStub as PDCounterBook
 from multiprocessing.pool import ThreadPool
 from threading import current_thread
 import atexit
 from multiprocessing.pool import ThreadPool
 from threading import current_thread
 import atexit
@@ -168,11 +169,13 @@ class BaseIndex(IndexStore):
             analyzer = WLAnalyzer()
         self.analyzer = analyzer
 
             analyzer = WLAnalyzer()
         self.analyzer = analyzer
 
-    def open(self, analyzer=None):
+    def open(self, timeout=None):
         if self.index:
             raise Exception("Index is already opened")
         if self.index:
             raise Exception("Index is already opened")
-        self.index = IndexWriter(self.store, self.analyzer,\
-                                 IndexWriter.MaxFieldLength.LIMITED)
+        conf = IndexWriterConfig(Version.LUCENE_34, self.analyzer)
+        if timeout:
+            conf.setWriteLockTimeout(long(timeout))
+        self.index = IndexWriter(self.store, conf)
         return self.index
 
     def optimize(self):
         return self.index
 
     def optimize(self):
@@ -219,6 +222,24 @@ class Index(BaseIndex):
             doc.add(Field("tag_category", tag.category, Field.Store.NO, Field.Index.NOT_ANALYZED))
             self.index.addDocument(doc)
 
             doc.add(Field("tag_category", tag.category, Field.Store.NO, Field.Index.NOT_ANALYZED))
             self.index.addDocument(doc)
 
+        for pdtag in PDCounterAuthor.objects.all():
+            doc = Document()
+            doc.add(NumericField("tag_id", Field.Store.YES, True).setIntValue(int(pdtag.id)))
+            doc.add(Field("tag_name", pdtag.name, Field.Store.NO, Field.Index.ANALYZED))
+            doc.add(Field("tag_name_pl", pdtag.name, Field.Store.NO, Field.Index.ANALYZED))
+            doc.add(Field("tag_category", 'pd_author', Field.Store.YES, Field.Index.NOT_ANALYZED))
+            doc.add(Field("is_pdcounter", 'true', Field.Store.YES, Field.Index.NOT_ANALYZED))
+            self.index.addDocument(doc)
+
+        for pdtag in PDCounterBook.objects.all():
+            doc = Document()
+            doc.add(NumericField("tag_id", Field.Store.YES, True).setIntValue(int(pdtag.id)))
+            doc.add(Field("tag_name", pdtag.title, Field.Store.NO, Field.Index.ANALYZED))
+            doc.add(Field("tag_name_pl", pdtag.title, Field.Store.NO, Field.Index.ANALYZED))
+            doc.add(Field("tag_category", 'pd_book', Field.Store.YES, Field.Index.NOT_ANALYZED))
+            doc.add(Field("is_pdcounter", 'true', Field.Store.YES, Field.Index.NOT_ANALYZED))
+            self.index.addDocument(doc)
+
     def create_book_doc(self, book):
         """
         Create a lucene document referring book id.
     def create_book_doc(self, book):
         """
         Create a lucene document referring book id.
@@ -252,11 +273,10 @@ class Index(BaseIndex):
                     book_doc.add(elem)
             else:
                 book_doc.add(f)
                     book_doc.add(elem)
             else:
                 book_doc.add(f)
-
         self.index.addDocument(book_doc)
         del book_doc
 
         self.index.addDocument(book_doc)
         del book_doc
 
-        self.index_content(book, book_fields=[meta_fields['title'], meta_fields['authors']])
+        self.index_content(book, book_fields=[meta_fields['title'], meta_fields['authors'], meta_fields['published_date']])
 
     master_tags = [
         'opowiadanie',
 
     master_tags = [
         'opowiadanie',
@@ -264,10 +284,21 @@ class Index(BaseIndex):
         'dramat_wierszowany_l',
         'dramat_wierszowany_lp',
         'dramat_wspolczesny', 'liryka_l', 'liryka_lp',
         'dramat_wierszowany_l',
         'dramat_wierszowany_lp',
         'dramat_wspolczesny', 'liryka_l', 'liryka_lp',
-        'wywiad'
+        'wywiad',
+        ]
+
+    ignore_content_tags = [
+        'uwaga', 'extra',
+        'zastepnik_tekstu', 'sekcja_asterysk', 'separator_linia', 'zastepnik_wersu',
+        'didaskalia',
+        'naglowek_aktu', 'naglowek_sceny', 'naglowek_czesc',
         ]
 
         ]
 
-    skip_header_tags = ['autor_utworu', 'nazwa_utworu', 'dzielo_nadrzedne']
+    footnote_tags = ['pa', 'pt', 'pr', 'pe']
+
+    skip_header_tags = ['autor_utworu', 'nazwa_utworu', 'dzielo_nadrzedne', '{http://www.w3.org/1999/02/22-rdf-syntax-ns#}RDF']
+
+    published_date_re = re.compile("([0-9]+)[\]. ]*$")
 
     def extract_metadata(self, book, book_info=None):
         """
 
     def extract_metadata(self, book, book_info=None):
         """
@@ -309,6 +340,15 @@ class Index(BaseIndex):
                     fields[field.name] = Field(field.name, "%04d%02d%02d" %\
                                                (dt.year, dt.month, dt.day), Field.Store.NO, Field.Index.NOT_ANALYZED)
 
                     fields[field.name] = Field(field.name, "%04d%02d%02d" %\
                                                (dt.year, dt.month, dt.day), Field.Store.NO, Field.Index.NOT_ANALYZED)
 
+        # get published date
+        pd = None
+        if hasattr(book_info, 'source_name') and book_info.source_name:
+            match = self.published_date_re.search(book_info.source_name)
+            if match is not None:
+                pd = str(match.groups()[0])
+        if not pd: pd = ""
+        fields["published_date"] = Field("published_date", pd, Field.Store.YES, Field.Index.NOT_ANALYZED)
+
         return fields
 
     def add_gaps(self, fields, fieldname):
         return fields
 
     def add_gaps(self, fields, fieldname):
@@ -341,15 +381,33 @@ class Index(BaseIndex):
         if master is None:
             return []
 
         if master is None:
             return []
 
-        def walker(node):
-            yield node, None
-            for child in list(node):
-                for b, e in walker(child):
-                    yield b, e
-            yield None, node
+        def walker(node, ignore_tags=[]):
+
+            if node.tag not in ignore_tags:
+                yield node, None, None
+                if node.text is not None:
+                    yield None, node.text, None
+                for child in list(node):
+                    for b, t, e in walker(child):
+                        yield b, t, e
+                yield None, None, node
+
+            if node.tail is not None:
+                yield None, node.tail, None
             return
 
         def fix_format(text):
             return
 
         def fix_format(text):
+            #            separator = [u" ", u"\t", u".", u";", u","]
+            if isinstance(text, list):
+                # need to join it first
+                text = filter(lambda s: s is not None, content)
+                text = u' '.join(text)
+                # for i in range(len(text)):
+                #     if i > 0:
+                #         if text[i][0] not in separator\
+                #             and text[i - 1][-1] not in separator:
+                #          text.insert(i, u" ")
+
             return re.sub("(?m)/$", "", text)
 
         def add_part(snippets, **fields):
             return re.sub("(?m)/$", "", text)
 
         def add_part(snippets, **fields):
@@ -407,56 +465,76 @@ class Index(BaseIndex):
 
                 # section content
                 content = []
 
                 # section content
                 content = []
-
-                for start, end in walker(header):
-                        # handle fragments and themes.
+                footnote = []
+
+                def all_content(text):
+                    for frag in fragments.values():
+                        frag['content'].append(text)
+                    content.append(text)
+                handle_text = [all_content]
+
+
+                for start, text, end in walker(header, ignore_tags=self.ignore_content_tags):
+                    # handle footnotes
+                    if start is not None and start.tag in self.footnote_tags:
+                        footnote = []
+                        def collect_footnote(t):
+                            footnote.append(t)
+                        handle_text.append(collect_footnote)
+                    elif end is not None and footnote is not [] and end.tag in self.footnote_tags:
+                        handle_text.pop()
+                        doc = add_part(snippets, header_index=position, header_type=header.tag,
+                                       content=u''.join(footnote),
+                                       is_footnote=Field("is_footnote", 'true', Field.Store.NO, Field.Index.NOT_ANALYZED))
+                
+                        self.index.addDocument(doc)
+                        #print "@ footnote text: %s" % footnote
+                        footnote = []
+                    
+                    # handle fragments and themes.
                     if start is not None and start.tag == 'begin':
                         fid = start.attrib['id'][1:]
                         fragments[fid] = {'content': [], 'themes': [], 'start_section': position, 'start_header': header.tag}
 
                     if start is not None and start.tag == 'begin':
                         fid = start.attrib['id'][1:]
                         fragments[fid] = {'content': [], 'themes': [], 'start_section': position, 'start_header': header.tag}
 
+                    # themes for this fragment
                     elif start is not None and start.tag == 'motyw':
                         fid = start.attrib['id'][1:]
                     elif start is not None and start.tag == 'motyw':
                         fid = start.attrib['id'][1:]
+                        handle_text.append(None)
                         if start.text is not None:
                             fragments[fid]['themes'] += map(str.strip, map(give_me_utf8, start.text.split(',')))
                         if start.text is not None:
                             fragments[fid]['themes'] += map(str.strip, map(give_me_utf8, start.text.split(',')))
+                    elif end is not None and end.tag == 'motyw':
+                        handle_text.pop()
 
                     elif start is not None and start.tag == 'end':
                         fid = start.attrib['id'][1:]
                         if fid not in fragments:
                             continue  # a broken <end> node, skip it
 
                     elif start is not None and start.tag == 'end':
                         fid = start.attrib['id'][1:]
                         if fid not in fragments:
                             continue  # a broken <end> node, skip it
-                                      #                        import pdb; pdb.set_trace()
                         frag = fragments[fid]
                         if frag['themes'] == []:
                             continue  # empty themes list.
                         del fragments[fid]
 
                         frag = fragments[fid]
                         if frag['themes'] == []:
                             continue  # empty themes list.
                         del fragments[fid]
 
-                        def jstr(l):
-                            return u' '.join(map(
-                                lambda x: x == None and u'(none)' or unicode(x),
-                                l))
-
                         doc = add_part(snippets,
                                        header_type=frag['start_header'],
                                        header_index=frag['start_section'],
                                        header_span=position - frag['start_section'] + 1,
                                        fragment_anchor=fid,
                         doc = add_part(snippets,
                                        header_type=frag['start_header'],
                                        header_index=frag['start_section'],
                                        header_span=position - frag['start_section'] + 1,
                                        fragment_anchor=fid,
-                                       content=u' '.join(filter(lambda s: s is not None, frag['content'])),
+                                       content=fix_format(frag['content']),
                                        themes=frag['themes'])
                                        themes=frag['themes'])
-
+                        #print '@ FRAG %s' % frag['content']
                         self.index.addDocument(doc)
 
                         # Collect content.
                         self.index.addDocument(doc)
 
                         # Collect content.
-                    elif start is not None:
-                        for frag in fragments.values():
-                            frag['content'].append(start.text)
-                        content.append(start.text)
-                    elif end is not None:
-                        for frag in fragments.values():
-                            frag['content'].append(end.tail)
-                        content.append(end.tail)
+
+                    if text is not None and handle_text is not []:
+                        hdl = handle_text[-1]
+                        if hdl is not None:
+                            hdl(text)
 
                         # in the end, add a section text.
                 doc = add_part(snippets, header_index=position, header_type=header.tag,
 
                         # in the end, add a section text.
                 doc = add_part(snippets, header_index=position, header_type=header.tag,
-                               content=fix_format(u' '.join(filter(lambda s: s is not None, content))))
+                               content=fix_format(content))
+                #print '@ CONTENT: %s' % fix_format(content)
 
                 self.index.addDocument(doc)
 
 
                 self.index.addDocument(doc)
 
@@ -485,12 +563,12 @@ class ReusableIndex(Index):
     """
     index = None
 
     """
     index = None
 
-    def open(self, analyzer=None, threads=4):
-        if ReusableIndex.index is not None:
+    def open(self, analyzer=None, **kw):
+        if ReusableIndex.index:
             self.index = ReusableIndex.index
         else:
             print("opening index")
             self.index = ReusableIndex.index
         else:
             print("opening index")
-            Index.open(self, analyzer)
+            Index.open(self, analyzer, **kw)
             ReusableIndex.index = self.index
             atexit.register(ReusableIndex.close_reusable)
 
             ReusableIndex.index = self.index
             atexit.register(ReusableIndex.close_reusable)
 
@@ -500,13 +578,15 @@ class ReusableIndex(Index):
 
     @staticmethod
     def close_reusable():
 
     @staticmethod
     def close_reusable():
-        if ReusableIndex.index is not None:
+        if ReusableIndex.index:
+            print("closing index")
             ReusableIndex.index.optimize()
             ReusableIndex.index.close()
             ReusableIndex.index = None
 
     def close(self):
             ReusableIndex.index.optimize()
             ReusableIndex.index.close()
             ReusableIndex.index = None
 
     def close(self):
-        pass
+        if ReusableIndex.index:
+            ReusableIndex.index.commit()
 
 
 class JoinSearch(object):
 
 
 class JoinSearch(object):
@@ -553,39 +633,44 @@ class JoinSearch(object):
 
 
 class SearchResult(object):
 
 
 class SearchResult(object):
-    def __init__(self, searcher, scoreDocs, score=None, how_found=None, snippets=None, searched=None, tokens_cache=None):
+    def __init__(self, search, scoreDocs, score=None, how_found=None, snippets=None, searched=None, tokens_cache=None):
         if tokens_cache is None: tokens_cache = {}
         if tokens_cache is None: tokens_cache = {}
-            
+
         if score:
             self._score = score
         else:
             self._score = scoreDocs.score
         if score:
             self._score = score
         else:
             self._score = scoreDocs.score
-            
+
         self.boost = 1.0
 
         self._hits = []
         self.boost = 1.0
 
         self._hits = []
-        self.hits = None  # processed hits
+        self._processed_hits = None  # processed hits
 
 
-        stored = searcher.doc(scoreDocs.doc)
+        stored = search.searcher.doc(scoreDocs.doc)
         self.book_id = int(stored.get("book_id"))
 
         self.book_id = int(stored.get("book_id"))
 
-        header_type = stored.get("header_type")
-        if not header_type:
-            return
+        pd = stored.get("published_date")
+        try:
+            self.published_date = int(pd)
+        except ValueError:
+            self.published_date = 0
 
 
-        sec = (header_type, int(stored.get("header_index")))
-        header_span = stored.get('header_span')
-        header_span = header_span is not None and int(header_span) or 1
+        header_type = stored.get("header_type")
+        # we have a content hit in some header of fragment
+        if header_type is not None:
+            sec = (header_type, int(stored.get("header_index")))
+            header_span = stored.get('header_span')
+            header_span = header_span is not None and int(header_span) or 1
 
 
-        fragment = stored.get("fragment_anchor")
+            fragment = stored.get("fragment_anchor")
 
 
-        if snippets:
-            snippets = snippets.replace("/\n", "\n")
-        hit = (sec + (header_span,), fragment, scoreDocs.score, {'how_found': how_found, 'snippets': snippets and [snippets] or []})
+            if snippets:
+                snippets = snippets.replace("/\n", "\n")
+            hit = (sec + (header_span,), fragment, scoreDocs.score, {'how_found': how_found, 'snippets': snippets and [snippets] or []})
 
 
-        self._hits.append(hit)
+            self._hits.append(hit)
 
 
-        self.searcher = searcher
+        self.search = search
         self.searched = searched
         self.tokens_cache = tokens_cache
 
         self.searched = searched
         self.tokens_cache = tokens_cache
 
@@ -598,7 +683,7 @@ class SearchResult(object):
             raise ValueError("this search result is or book %d; tried to merge with %d" % (self.book_id, other.book_id))
         self._hits += other._hits
         if other.score > self.score:
             raise ValueError("this search result is or 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 = other._score
         return self
 
     def get_book(self):
         return self
 
     def get_book(self):
@@ -606,7 +691,11 @@ class SearchResult(object):
 
     book = property(get_book)
 
 
     book = property(get_book)
 
-    def process_hits(self):
+    @property
+    def hits(self):
+        if self._processed_hits is not None:
+            return self._processed_hits
+
         POSITION = 0
         FRAGMENT = 1
         POSITION_INDEX = 1
         POSITION = 0
         FRAGMENT = 1
         POSITION_INDEX = 1
@@ -653,17 +742,21 @@ class SearchResult(object):
         hits = sections.values()
 
         for f in frags:
         hits = sections.values()
 
         for f in frags:
-            frag = catalogue.models.Fragment.objects.get(anchor=f[FRAGMENT])
+            try:
+                frag = catalogue.models.Fragment.objects.get(anchor=f[FRAGMENT], book__id=self.book_id)
+            except catalogue.models.Fragment.DoesNotExist:
+                # stale index
+                continue
 
             # Figure out if we were searching for a token matching some word in theme name.
             themes = frag.tags.filter(category='theme')
             themes_hit = []
             if self.searched is not None:
 
             # Figure out if we were searching for a token matching some word in theme name.
             themes = frag.tags.filter(category='theme')
             themes_hit = []
             if self.searched is not None:
-                tokens = self.searcher.get_tokens(self.searched, 'POLISH', tokens_cache=self.tokens_cache)
+                tokens = self.search.get_tokens(self.searched, 'POLISH', cached=self.tokens_cache)
                 for theme in themes:
                 for theme in themes:
-                    name_tokens = self.searcher.get_tokens(theme.name, 'POLISH')
+                    name_tokens = self.search.get_tokens(theme.name, 'POLISH')
                     for t in tokens:
                     for t in tokens:
-                        if name_tokens.index(t):
+                        if t in name_tokens:
                             if not theme in themes_hit:
                                 themes_hit.append(theme)
                             break
                             if not theme in themes_hit:
                                 themes_hit.append(theme)
                             break
@@ -679,9 +772,9 @@ class SearchResult(object):
 
         hits.sort(lambda a, b: cmp(a['score'], b['score']), reverse=True)
 
 
         hits.sort(lambda a, b: cmp(a['score'], b['score']), reverse=True)
 
-        self.hits = hits
+        self._processed_hits = hits
 
 
-        return self
+        return hits
 
     def __unicode__(self):
         return u'SearchResult(book_id=%d, score=%d)' % (self.book_id, self.score)
 
     def __unicode__(self):
         return u'SearchResult(book_id=%d, score=%d)' % (self.book_id, self.score)
@@ -699,7 +792,12 @@ class SearchResult(object):
         return books.values()
 
     def __cmp__(self, other):
         return books.values()
 
     def __cmp__(self, other):
-        return cmp(self.score, other.score)
+        c = cmp(self.score, other.score)
+        if c == 0:
+            # this is inverted, because earlier date is better
+            return cmp(other.published_date, self.published_date)
+        else:
+            return c
 
 
 class Hint(object):
 
 
 class Hint(object):
@@ -909,21 +1007,21 @@ class Search(IndexStore):
         return q
 
     def search_phrase(self, searched, field, book=True, max_results=20, fuzzy=False,
         return q
 
     def search_phrase(self, searched, field, book=True, max_results=20, fuzzy=False,
-                      filters=None, tokens_cache=None, boost=None):
+                      filters=None, tokens_cache=None, boost=None, snippets=False, slop=2):
         if filters is None: filters = []
         if tokens_cache is None: tokens_cache = {}
 
         tokens = self.get_tokens(searched, field, cached=tokens_cache)
 
         if filters is None: filters = []
         if tokens_cache is None: tokens_cache = {}
 
         tokens = self.get_tokens(searched, field, cached=tokens_cache)
 
-        query = self.make_phrase(tokens, field=field, fuzzy=fuzzy)
+        query = self.make_phrase(tokens, field=field, fuzzy=fuzzy, slop=slop)
         if book:
             filters.append(self.term_filter(Term('is_book', 'true')))
         top = self.searcher.search(query, self.chain_filters(filters), max_results)
 
         if book:
             filters.append(self.term_filter(Term('is_book', 'true')))
         top = self.searcher.search(query, self.chain_filters(filters), max_results)
 
-        return [SearchResult(self.searcher, found) for found in top.scoreDocs]
+        return [SearchResult(self, found, snippets=(snippets and self.get_snippets(found, query) or None), searched=searched) for found in top.scoreDocs]
 
     def search_some(self, searched, fields, book=True, max_results=20, fuzzy=False,
 
     def search_some(self, searched, fields, book=True, max_results=20, fuzzy=False,
-                    filters=None, tokens_cache=None, boost=None):
+                    filters=None, tokens_cache=None, boost=None, snippets=True):
         if filters is None: filters = []
         if tokens_cache is None: tokens_cache = {}
 
         if filters is None: filters = []
         if tokens_cache is None: tokens_cache = {}
 
@@ -940,7 +1038,8 @@ class Search(IndexStore):
 
         top = self.searcher.search(query, self.chain_filters(filters), max_results)
 
 
         top = self.searcher.search(query, self.chain_filters(filters), max_results)
 
-        return [SearchResult(self.searcher, found, searched=searched, tokens_cache=tokens_cache) for found in top.scoreDocs]
+        return [SearchResult(self, found, searched=searched, tokens_cache=tokens_cache,
+                             snippets=(snippets and self.get_snippets(found, query) or None)) for found in top.scoreDocs]
 
     def search_perfect_book(self, searched, max_results=20, fuzzy=False, hint=None):
         """
 
     def search_perfect_book(self, searched, max_results=20, fuzzy=False, hint=None):
         """
@@ -963,7 +1062,7 @@ class Search(IndexStore):
                 self.chain_filters([only_in, self.term_filter(Term('is_book', 'true'))]),
                 max_results)
             for found in top.scoreDocs:
                 self.chain_filters([only_in, self.term_filter(Term('is_book', 'true'))]),
                 max_results)
             for found in top.scoreDocs:
-                books.append(SearchResult(self.searcher, found, how_found="search_perfect_book"))
+                books.append(SearchResult(self, found, how_found="search_perfect_book"))
         return books
 
     def search_book(self, searched, max_results=20, fuzzy=False, hint=None):
         return books
 
     def search_book(self, searched, max_results=20, fuzzy=False, hint=None):
@@ -989,7 +1088,7 @@ class Search(IndexStore):
                                    self.chain_filters([only_in, self.term_filter(Term('is_book', 'true'))]),
             max_results)
         for found in top.scoreDocs:
                                    self.chain_filters([only_in, self.term_filter(Term('is_book', 'true'))]),
             max_results)
         for found in top.scoreDocs:
-            books.append(SearchResult(self.searcher, found, how_found="search_book"))
+            books.append(SearchResult(self, found, how_found="search_book"))
 
         return books
 
 
         return books
 
@@ -1011,7 +1110,7 @@ class Search(IndexStore):
                                                            flt]),
                                        max_results)
             for found in top.scoreDocs:
                                                            flt]),
                                        max_results)
             for found in top.scoreDocs:
-                books.append(SearchResult(self.searcher, found, snippets=self.get_snippets(found, q), how_found='search_perfect_parts'))
+                books.append(SearchResult(self, found, snippets=self.get_snippets(found, q), how_found='search_perfect_parts'))
 
         return books
 
 
         return books
 
@@ -1044,7 +1143,7 @@ class Search(IndexStore):
 
         topDocs = self.searcher.search(q, only_in, max_results)
         for found in topDocs.scoreDocs:
 
         topDocs = self.searcher.search(q, only_in, max_results)
         for found in topDocs.scoreDocs:
-            books.append(SearchResult(self.searcher, found, how_found='search_everywhere_themesXcontent'))
+            books.append(SearchResult(self, found, how_found='search_everywhere_themesXcontent', searched=searched))
             print "* %s theme x content: %s" % (searched, books[-1]._hits)
 
         # query themes/content x author/title/tags
             print "* %s theme x content: %s" % (searched, books[-1]._hits)
 
         # query themes/content x author/title/tags
@@ -1063,7 +1162,7 @@ class Search(IndexStore):
 
         topDocs = self.searcher.search(q, only_in, max_results)
         for found in topDocs.scoreDocs:
 
         topDocs = self.searcher.search(q, only_in, max_results)
         for found in topDocs.scoreDocs:
-            books.append(SearchResult(self.searcher, found, how_found='search_everywhere'))
+            books.append(SearchResult(self, found, how_found='search_everywhere', searched=searched))
             print "* %s scatter search: %s" % (searched, books[-1]._hits)
 
         return books
             print "* %s scatter search: %s" % (searched, books[-1]._hits)
 
         return books
@@ -1119,18 +1218,30 @@ class Search(IndexStore):
 
         stored = self.searcher.doc(scoreDoc.doc)
 
 
         stored = self.searcher.doc(scoreDoc.doc)
 
+        position = stored.get('snippets_position')
+        length = stored.get('snippets_length')
+        if position is None or length is None:
+            return None
         # locate content.
         # locate content.
-        snippets = Snippets(stored.get('book_id')).open()
+        book_id = int(stored.get('book_id'))
+        snippets = Snippets(book_id).open()
         try:
         try:
-            text = snippets.get((int(stored.get('snippets_position')),
-                                 int(stored.get('snippets_length'))))
-        finally:
-            snippets.close()
+            try:
+                text = snippets.get((int(position),
+                                     int(length)))
+            finally:
+                snippets.close()
 
 
-        tokenStream = TokenSources.getAnyTokenStream(self.searcher.getIndexReader(), scoreDoc.doc, field, self.analyzer)
-        #  highlighter.getBestTextFragments(tokenStream, text, False, 10)
-        snip = highlighter.getBestFragments(tokenStream, text, 3, "...")
+            tokenStream = TokenSources.getAnyTokenStream(self.searcher.getIndexReader(), scoreDoc.doc, field, self.analyzer)
+            #  highlighter.getBestTextFragments(tokenStream, text, False, 10)
+            snip = highlighter.getBestFragments(tokenStream, text, 3, "...")
 
 
+        except Exception, e:
+            e2 = e
+            if hasattr(e, 'getJavaException'):
+                e2 = unicode(e.getJavaException())
+            raise Exception("Problem fetching snippets for book %d, @%d len=%d" % (book_id, int(position), int(length)),
+                e2)
         return snip
 
     @staticmethod
         return snip
 
     @staticmethod
@@ -1150,19 +1261,34 @@ class Search(IndexStore):
         if terms:
             return JArray('object')(terms, Term)
 
         if terms:
             return JArray('object')(terms, Term)
 
-    def search_tags(self, query, filter=None, max_results=40):
+    def search_tags(self, query, filters=None, max_results=40, pdcounter=False):
         """
         Search for Tag objects using query.
         """
         """
         Search for Tag objects using query.
         """
-        tops = self.searcher.search(query, filter, max_results)
+        if not pdcounter:
+            filters = self.chain_filters([filter, self.term_filter(Term('is_pdcounter', 'true'), inverse=True)])
+        tops = self.searcher.search(query, filters, max_results)
 
         tags = []
         for found in tops.scoreDocs:
             doc = self.searcher.doc(found.doc)
 
         tags = []
         for found in tops.scoreDocs:
             doc = self.searcher.doc(found.doc)
-            tag = catalogue.models.Tag.objects.get(id=doc.get("tag_id"))
-            tags.append(tag)
-            print "%s (%d) -> %f" % (tag, tag.id, found.score)
-
+            is_pdcounter = doc.get('is_pdcounter')
+            category = doc.get('tag_category')
+            if is_pdcounter == 'true':
+                if category == 'pd_author':
+                    tag = PDCounterAuthor.objects.get(id=doc.get('tag_id'))
+                elif category == 'pd_book':
+                    tag = PDCounterBook.objects.get(id=doc.get('tag_id'))
+                    tag.category = 'pd_book'  # make it look more lik a tag.
+                else:
+                    print "Warning. cannot get pdcounter tag_id=%d from db; cat=%s" % (int(doc.get('tag_id')), category)
+            else:
+                tag = catalogue.models.Tag.objects.get(id=doc.get("tag_id"))
+                # don't add the pdcounter tag if same tag already exists
+            if not (is_pdcounter and filter(lambda t: tag.slug == t.slug, tags)):
+                tags.append(tag)
+                #            print "%s (%d) -> %f" % (tag, tag.id, found.score)
+        print 'returning %s' % tags
         return tags
 
     def search_books(self, query, filter=None, max_results=10):
         return tags
 
     def search_books(self, query, filter=None, max_results=10):
@@ -1176,7 +1302,7 @@ class Search(IndexStore):
             bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id")))
         return bks
 
             bks.append(catalogue.models.Book.objects.get(id=doc.get("book_id")))
         return bks
 
-    def create_prefix_phrase(self, toks, field):
+    def make_prefix_phrase(self, toks, field):
         q = MultiPhraseQuery()
         for i in range(len(toks)):
             t = Term(field, toks[i])
         q = MultiPhraseQuery()
         for i in range(len(toks)):
             t = Term(field, toks[i])
@@ -1202,7 +1328,7 @@ class Search(IndexStore):
 
         return only_term
 
 
         return only_term
 
-    def hint_tags(self, string, max_results=50):
+    def hint_tags(self, string, max_results=50, pdcounter=True, prefix=True, fuzzy=False):
         """
         Return auto-complete hints for tags
         using prefix search.
         """
         Return auto-complete hints for tags
         using prefix search.
@@ -1211,14 +1337,17 @@ class Search(IndexStore):
         top = BooleanQuery()
 
         for field in ['tag_name', 'tag_name_pl']:
         top = BooleanQuery()
 
         for field in ['tag_name', 'tag_name_pl']:
-            q = self.create_prefix_phrase(toks, field)
+            if prefix:
+                q = self.make_prefix_phrase(toks, field)
+            else:
+                q = self.make_term_query(toks, field, fuzzy=fuzzy)
             top.add(BooleanClause(q, BooleanClause.Occur.SHOULD))
 
         no_book_cat = self.term_filter(Term("tag_category", "book"), inverse=True)
 
             top.add(BooleanClause(q, BooleanClause.Occur.SHOULD))
 
         no_book_cat = self.term_filter(Term("tag_category", "book"), inverse=True)
 
-        return self.search_tags(top, no_book_cat, max_results=max_results)
+        return self.search_tags(top, no_book_cat, max_results=max_results, pdcounter=pdcounter)
 
 
-    def hint_books(self, string, max_results=50):
+    def hint_books(self, string, max_results=50, prefix=True, fuzzy=False):
         """
         Returns auto-complete hints for book titles
         Because we do not index 'pseudo' title-tags.
         """
         Returns auto-complete hints for book titles
         Because we do not index 'pseudo' title-tags.
@@ -1226,7 +1355,10 @@ class Search(IndexStore):
         """
         toks = self.get_tokens(string, field='SIMPLE')
 
         """
         toks = self.get_tokens(string, field='SIMPLE')
 
-        q = self.create_prefix_phrase(toks, 'title')
+        if prefix:
+            q = self.make_prefix_phrase(toks, 'title')
+        else:
+            q = self.make_term_query(toks, 'title', fuzzy=fuzzy)
 
         return self.search_books(q, self.term_filter(Term("is_book", "true")), max_results=max_results)
 
 
         return self.search_books(q, self.term_filter(Term("is_book", "true")), max_results=max_results)