FB2 fix

[wolnelektury.git] / apps / search / views.py

diff --git a/apps/search/views.py b/apps/search/views.py
index 5ed6107..ec8275b 100644 (file)
--- a/apps/search/views.py
+++ b/apps/search/views.py
@@ -1,27 +1,254 @@
+# -*- coding: utf-8 -*-

 
 

-
+from django.conf import settings

 from django.shortcuts import render_to_response, get_object_or_404
 from django.template import RequestContext
 from django.contrib.auth.decorators import login_required
 from django.views.decorators import cache
 from django.shortcuts import render_to_response, get_object_or_404
 from django.template import RequestContext
 from django.contrib.auth.decorators import login_required
 from django.views.decorators import cache

+from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
+from django.utils.translation import ugettext as _
+
+from catalogue.utils import split_tags
+from catalogue.models import Book, Tag, Fragment
+from pdcounter.models import Author as PDCounterAuthor, BookStub as PDCounterBook
+from catalogue.views import JSONResponse
+from search import Search, JVM, SearchResult
+from lucene import StringReader
+from suggest.forms import PublishingSuggestForm
+from time import sleep
+import re
+#import enchant
+import json
+
+#dictionary = enchant.Dict('en_US')
+
+
+def match_word_re(word):
+    if 'sqlite' in settings.DATABASES['default']['ENGINE']:
+        return r"\b%s\b" % word
+    elif 'mysql' in settings.DATABASES['default']['ENGINE']:
+        return "[[:<:]]%s[[:>:]]" % word
+
+
+def did_you_mean(query, tokens):
+    change = {}
+    for t in tokens:
+        authors = Tag.objects.filter(category='author', name__iregex=match_word_re(t))
+        if len(authors) > 0:
+            continue
+
+        if False:
+            if not dictionary.check(t):
+                try:
+                    change_to = dictionary.suggest(t)[0].lower()
+                    if change_to != t.lower():
+                        change[t] = change_to
+                except IndexError:
+                    pass
+
+    if change == {}:
+        return None
+
+    for frm, to in change.items():
+        query = query.replace(frm, to)
+
+    return query
+
+
+JVM.attachCurrentThread()
+_search = None
+
+
+def get_search():
+    global _search
+
+    while _search is False:
+        sleep(1)
+
+    if _search is None:
+        _search = False
+        _search = Search()
+    return _search
+
+
+def hint(request):
+    prefix = request.GET.get('term', '')
+    if len(prefix) < 2:
+        return JSONResponse([])
+    JVM.attachCurrentThread()
+
+    search = get_search()
+    hint = search.hint()
+    try:
+        tags = request.GET.get('tags', '')
+        hint.tags(Tag.get_tag_list(tags))
+    except:
+        pass
+
+    # tagi beda ograniczac tutaj
+    # ale tagi moga byc na ksiazce i na fragmentach
+    # jezeli tagi dot tylko ksiazki, to wazne zeby te nowe byly w tej samej ksiazce
+    # jesli zas dotycza themes, to wazne, zeby byly w tym samym fragmencie.
+
+    tags = search.hint_tags(prefix, pdcounter=True)
+    books = search.hint_books(prefix)

 
 

-from catalogue.utils import get_random_hash
-from catalogue.models import Book, Tag
-from catalogue import forms
-from search import MultiSearch, JVM
+    
+    def is_dupe(tag):
+        if isinstance(tag, PDCounterAuthor):
+            if filter(lambda t: t.slug == tag.slug and t != tag, tags):
+                return True
+        elif isinstance(tag, PDCounterBook):
+            if filter(lambda b: b.slug == tag.slug, tags):
+                return True
+        return False
+
+    tags = filter(lambda t: not is_dupe(t), tags)
+
+    def category_name(c):
+        if c.startswith('pd_'):
+            c = c[len('pd_'):]
+        return _(c)
+
+    callback = request.GET.get('callback', None)
+    data = [{'label': t.name,
+              'category': category_name(t.category),
+              'id': t.id,
+              'url': t.get_absolute_url()}
+              for t in tags] + \
+              [{'label': b.title,
+                'category': _('book'),
+                'id': b.id,
+                'url': b.get_absolute_url()}
+                for b in books]
+    if callback:
+        return HttpResponse("%s(%s);" % (callback, json.dumps(data)),
+                            content_type="application/json; charset=utf-8")
+    else:
+        return JSONResponse(data)
+            

 
 
 def main(request):
     results = {}
     JVM.attachCurrentThread()  # where to put this?
 
 
 def main(request):
     results = {}
     JVM.attachCurrentThread()  # where to put this?

-    srch = MultiSearch()

 
     results = None
 
     results = None

-    if 'q' in request.GET:
-        toks = srch.get_tokens(request.GET['q'])
-        results = srch.search_perfect(toks) + srch.search_everywhere(toks)
-        results.sort(lambda a, b: cmp(a[0], b[0]) < 0)
-        print("searched, results are: %s\n" % results)
-
-    return render_to_response('newsearch/search.html', {"results": results},
-                              context_instance=RequestContext(request))
+    query = None
+    fuzzy = False #0.8
+
+    query = request.GET.get('q','')
+    # book_id = request.GET.get('book', None)
+    # book = None
+    # if book_id is not None:
+    #     book = get_object_or_404(Book, id=book_id)
+
+    # hint = search.hint()
+    # try:
+    #     tag_list = Tag.get_tag_list(tags)
+    # except:
+    #     tag_list = []
+
+    if len(query) < 2:
+        return render_to_response('catalogue/search_too_short.html', {'prefix': query},
+                                  context_instance=RequestContext(request))
+
+    search = get_search()
+    # hint.tags(tag_list)
+    # if book:
+    #     hint.books(book)
+    tags = search.hint_tags(query, pdcounter=True, prefix=False, fuzzy=fuzzy)
+    tags = split_tags(tags)
+
+    toks = StringReader(query)
+    tokens_cache = {}
+
+    author_results = search.search_phrase(toks, 'authors', fuzzy=fuzzy, tokens_cache=tokens_cache)
+    title_results = search.search_phrase(toks, 'title', fuzzy=fuzzy, tokens_cache=tokens_cache)
+
+    # Boost main author/title results with mixed search, and save some of its results for end of list.
+    # boost author, title results
+    author_title_mixed = search.search_some(toks, ['authors', 'title', 'tags'], fuzzy=fuzzy, tokens_cache=tokens_cache)
+    author_title_rest = []
+    for b in author_title_mixed:
+        bks = filter(lambda ba: ba.book_id == b.book_id, author_results + title_results)
+        for b2 in bks:
+            b2.boost *= 1.1
+        if bks is []:
+            author_title_rest.append(b)
+
+    # Do a phrase search but a term search as well - this can give us better snippets then search_everywhere,
+    # Because the query is using only one field.
+    text_phrase = SearchResult.aggregate(
+        search.search_phrase(toks, 'content', fuzzy=fuzzy, tokens_cache=tokens_cache, snippets=True, book=False, slop=4),
+        search.search_some(toks, ['content'], tokens_cache=tokens_cache, snippets=True, book=False))
+
+    everywhere = search.search_everywhere(toks, fuzzy=fuzzy, tokens_cache=tokens_cache)
+
+    def already_found(results):
+        def f(e):
+            for r in results:
+                if e.book_id == r.book_id:
+                    e.boost = 0.9
+                    results.append(e)
+                    return True
+            return False
+        return f
+    f = already_found(author_results + title_results + text_phrase)
+    everywhere = filter(lambda x: not f(x), everywhere)
+
+    author_results = SearchResult.aggregate(author_results)
+    title_results = SearchResult.aggregate(title_results)
+
+    everywhere = SearchResult.aggregate(everywhere, author_title_rest)
+
+    for res in [author_results, title_results, text_phrase, everywhere]:
+        res.sort(reverse=True)
+        for r in res:
+            for h in r.hits:
+                h['snippets'] = map(lambda s:
+                                    re.subn(r"(^[ \t\n]+|[ \t\n]+$)", u"",
+                                            re.subn(r"[ \t\n]*\n[ \t\n]*", u"\n", s)[0])[0], h['snippets'])
+
+    suggestion = did_you_mean(query, search.get_tokens(toks, field="SIMPLE"))
+
+    def ensure_exists(r):
+        try:
+            return r.book
+        except Book.DoesNotExist:
+            return False
+
+    author_results = filter(ensure_exists, author_results)
+    title_results = filter(ensure_exists, title_results)
+    text_phrase = filter(ensure_exists, text_phrase)
+    everywhere = filter(ensure_exists, everywhere)
+
+    results = author_results + title_results + text_phrase + everywhere
+    # ensure books do exists & sort them
+    results.sort(reverse=True)
+
+    if len(results) == 1:
+        fragment_hits = filter(lambda h: 'fragment' in h, results[0].hits)
+        if len(fragment_hits) == 1:
+            #anchor = fragment_hits[0]['fragment']
+            #frag = Fragment.objects.get(anchor=anchor)
+            return HttpResponseRedirect(fragment_hits[0]['fragment'].get_absolute_url())
+        return HttpResponseRedirect(results[0].book.get_absolute_url())
+    elif len(results) == 0:
+        form = PublishingSuggestForm(initial={"books": query + ", "})
+        return render_to_response('catalogue/search_no_hits.html',
+                                  {'tags': tags,
+                                   'prefix': query,
+                                   "form": form,
+                                   'did_you_mean': suggestion},
+            context_instance=RequestContext(request))
+
+    return render_to_response('catalogue/search_multiple_hits.html',
+                              {'tags': tags,
+                               'prefix': query,
+                               'results': { 'author': author_results,
+                                            'title': title_results,
+                                            'content': text_phrase,
+                                            'other': everywhere},
+                               'did_you_mean': suggestion},
+        context_instance=RequestContext(request))