apps/search/views.py

   1 # -*- coding: utf-8 -*-
   2
   3 from django.conf import settings
   4 from django.shortcuts import render_to_response, get_object_or_404
   5 from django.template import RequestContext
   6 from django.contrib.auth.decorators import login_required
   7 from django.views.decorators import cache
   8 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
   9 from django.utils.translation import ugettext as _
  10
  11 from catalogue.utils import split_tags
  12 from catalogue.models import Book, Tag, Fragment
  13 from pdcounter.models import Author as PDCounterAuthor, BookStub as PDCounterBook
  14 from catalogue.views import JSONResponse
  15 from search import Search, SearchResult
  16 from lucene import StringReader
  17 from suggest.forms import PublishingSuggestForm
  18 from time import sleep
  19 import re
  20 #import enchant
  21 import json
  22
  23
  24 def match_word_re(word):
  25     if 'sqlite' in settings.DATABASES['default']['ENGINE']:
  26         return r"\b%s\b" % word
  27     elif 'mysql' in settings.DATABASES['default']['ENGINE']:
  28         return "[[:<:]]%s[[:>:]]" % word
  29
  30
  31 def did_you_mean(query, tokens):
  32     return query
  33     # change = {}
  34     # for t in tokens:
  35     #     authors = Tag.objects.filter(category='author', name__iregex=match_word_re(t))
  36     #     if len(authors) > 0:
  37     #         continue
  38
  39     #     if False:
  40     #         if not dictionary.check(t):
  41     #             try:
  42     #                 change_to = dictionary.suggest(t)[0].lower()
  43     #                 if change_to != t.lower():
  44     #                     change[t] = change_to
  45     #             except IndexError:
  46     #                 pass
  47
  48     # if change == {}:
  49     #     return None
  50
  51     # for frm, to in change.items():
  52     #     query = query.replace(frm, to)
  53
  54     # return query
  55
  56
  57 def hint(request):
  58     prefix = request.GET.get('term', '')
  59     if len(prefix) < 2:
  60         return JSONResponse([])
  61
  62     search = Search()
  63     # tagi beda ograniczac tutaj
  64     # ale tagi moga byc na ksiazce i na fragmentach
  65     # jezeli tagi dot tylko ksiazki, to wazne zeby te nowe byly w tej samej ksiazce
  66     # jesli zas dotycza themes, to wazne, zeby byly w tym samym fragmencie.
  67
  68     tags = search.hint_tags(prefix, pdcounter=True)
  69     books = search.hint_books(prefix)
  70
  71     def is_dupe(tag):
  72         if isinstance(tag, PDCounterAuthor):
  73             if filter(lambda t: t.slug == tag.slug and t != tag, tags):
  74                 return True
  75         elif isinstance(tag, PDCounterBook):
  76             if filter(lambda b: b.slug == tag.slug, tags):
  77                 return True
  78         return False
  79
  80     tags = filter(lambda t: not is_dupe(t), tags)
  81
  82     def category_name(c):
  83         if c.startswith('pd_'):
  84             c = c[len('pd_'):]
  85         return _(c)
  86
  87     callback = request.GET.get('callback', None)
  88     data = [{'label': t.name,
  89               'category': category_name(t.category),
  90               'id': t.id,
  91               'url': t.get_absolute_url()}
  92               for t in tags] + \
  93               [{'label': b.title,
  94                 'category': _('book'),
  95                 'id': b.id,
  96                 'url': b.get_absolute_url()}
  97                 for b in books]
  98     if callback:
  99         return HttpResponse("%s(%s);" % (callback, json.dumps(data)),
 100                             content_type="application/json; charset=utf-8")
 101     else:
 102         return JSONResponse(data)
 103
 104
 105 def main(request):
 106     results = {}
 107
 108     results = None
 109     query = None
 110
 111     query = request.GET.get('q', '')
 112
 113     if len(query) < 2:
 114         return render_to_response('catalogue/search_too_short.html',
 115                                   {'prefix': query},
 116             context_instance=RequestContext(request))
 117     search = Search()
 118
 119     theme_terms = search.index.analyze(text=query, field="themes_pl") \
 120         + search.index.analyze(text=query, field="themes")
 121
 122             # change hints
 123     tags = search.hint_tags(query, pdcounter=True, prefix=False)
 124     tags = split_tags(tags)
 125
 126     author_results = search.search_phrase(query, 'authors', book=True)
 127     translator_results = search.search_phrase(query, 'translators', book=True)
 128
 129     title_results = search.search_phrase(query, 'title', book=True)
 130
 131     # Boost main author/title results with mixed search, and save some of its results for end of list.
 132     # boost author, title results
 133     author_title_mixed = search.search_some(query, ['authors', 'translators', 'title', 'tags'], query_terms=theme_terms)
 134     author_title_rest = []
 135
 136     for b in author_title_mixed:
 137         also_in_mixed = filter(lambda ba: ba.book_id == b.book_id, author_results + translator_results + title_results)
 138         for b2 in also_in_mixed:
 139             b2.boost *= 1.1
 140         if also_in_mixed is []:
 141             author_title_rest.append(b)
 142
 143     # Do a phrase search but a term search as well - this can give us better snippets then search_everywhere,
 144     # Because the query is using only one field.
 145     text_phrase = SearchResult.aggregate(
 146         search.search_phrase(query, 'text', snippets=True, book=False),
 147         search.search_some(query, ['text'], snippets=True, book=False, query_terms=theme_terms))
 148
 149     everywhere = search.search_everywhere(query, query_terms=theme_terms)
 150
 151     def already_found(results):
 152         def f(e):
 153             for r in results:
 154                 if e.book_id == r.book_id:
 155                     e.boost = 0.9
 156                     results.append(e)
 157                     return True
 158             return False
 159         return f
 160     f = already_found(author_results + translator_results + title_results + text_phrase)
 161     everywhere = filter(lambda x: not f(x), everywhere)
 162
 163     author_results = SearchResult.aggregate(author_results)
 164     translator_results = SearchResult.aggregate(translator_results)
 165     title_results = SearchResult.aggregate(title_results)
 166
 167     everywhere = SearchResult.aggregate(everywhere, author_title_rest)
 168
 169     for field, res in [('authors', author_results),
 170                        ('translators', translator_results),
 171                        ('title', title_results),
 172                        ('text', text_phrase),
 173                        ('text', everywhere)]:
 174         res.sort(reverse=True)
 175         for r in res:
 176             search.get_snippets(r, query, field, 3)
 177
 178     suggestion = u''
 179
 180     def ensure_exists(r):
 181         try:
 182             return r.book
 183         except Book.DoesNotExist:
 184             return False
 185
 186     author_results = filter(ensure_exists, author_results)
 187     translator_results = filter(ensure_exists, translator_results)
 188     title_results = filter(ensure_exists, title_results)
 189     text_phrase = filter(ensure_exists, text_phrase)
 190     everywhere = filter(ensure_exists, everywhere)
 191
 192     results = author_results + translator_results + title_results + text_phrase + everywhere
 193     # ensure books do exists & sort them
 194     results.sort(reverse=True)
 195
 196     # We don't want to redirect to book text, but rather display result page even with one result.
 197     # if len(results) == 1:
 198     #     fragment_hits = filter(lambda h: 'fragment' in h, results[0].hits)
 199     #     if len(fragment_hits) == 1:
 200     #         #anchor = fragment_hits[0]['fragment']
 201     #         #frag = Fragment.objects.get(anchor=anchor)
 202     #         return HttpResponseRedirect(fragment_hits[0]['fragment'].get_absolute_url())
 203     #     return HttpResponseRedirect(results[0].book.get_absolute_url())
 204     if len(results) == 0:
 205         form = PublishingSuggestForm(initial={"books": query + ", "})
 206         return render_to_response('catalogue/search_no_hits.html',
 207                                   {'tags': tags,
 208                                    'prefix': query,
 209                                    "form": form,
 210                                    'did_you_mean': suggestion},
 211             context_instance=RequestContext(request))
 212
 213     return render_to_response('catalogue/search_multiple_hits.html',
 214                               {'tags': tags,
 215                                'prefix': query,
 216                                'results': {'author': author_results,
 217                                            'translator': translator_results,
 218                                            'title': title_results,
 219                                            'content': text_phrase,
 220                                            'other': everywhere},
 221                                'did_you_mean': suggestion},
 222         context_instance=RequestContext(request))