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     title_results = search.search_phrase(query, 'title', book=True)
 128
 129     # Boost main author/title results with mixed search, and save some of its results for end of list.
 130     # boost author, title results
 131     author_title_mixed = search.search_some(query, ['authors', 'title', 'tags'], query_terms=theme_terms)
 132     author_title_rest = []
 133
 134     for b in author_title_mixed:
 135         also_in_mixed = filter(lambda ba: ba.book_id == b.book_id, author_results + title_results)
 136         for b2 in also_in_mixed:
 137             b2.boost *= 1.1
 138         if also_in_mixed is []:
 139             author_title_rest.append(b)
 140
 141     # Do a phrase search but a term search as well - this can give us better snippets then search_everywhere,
 142     # Because the query is using only one field.
 143     text_phrase = SearchResult.aggregate(
 144         search.search_phrase(query, 'text', snippets=True, book=False),
 145         search.search_some(query, ['text'], snippets=True, book=False, query_terms=theme_terms))
 146
 147     everywhere = search.search_everywhere(query, query_terms=theme_terms)
 148
 149     def already_found(results):
 150         def f(e):
 151             for r in results:
 152                 if e.book_id == r.book_id:
 153                     e.boost = 0.9
 154                     results.append(e)
 155                     return True
 156             return False
 157         return f
 158     f = already_found(author_results + title_results + text_phrase)
 159     everywhere = filter(lambda x: not f(x), everywhere)
 160
 161     author_results = SearchResult.aggregate(author_results)
 162     title_results = SearchResult.aggregate(title_results)
 163
 164     everywhere = SearchResult.aggregate(everywhere, author_title_rest)
 165
 166     for field, res in [('authors', author_results),
 167                        ('title', title_results),
 168                        ('text', text_phrase),
 169                        ('text', everywhere)]:
 170         res.sort(reverse=True)
 171         for r in res:
 172             search.get_snippets(r, query, field, 3)
 173
 174     suggestion = u''
 175
 176     def ensure_exists(r):
 177         try:
 178             return r.book
 179         except Book.DoesNotExist:
 180             return False
 181
 182     author_results = filter(ensure_exists, author_results)
 183     title_results = filter(ensure_exists, title_results)
 184     text_phrase = filter(ensure_exists, text_phrase)
 185     everywhere = filter(ensure_exists, everywhere)
 186
 187     results = author_results + title_results + text_phrase + everywhere
 188     # ensure books do exists & sort them
 189     results.sort(reverse=True)
 190
 191     if len(results) == 1:
 192         fragment_hits = filter(lambda h: 'fragment' in h, results[0].hits)
 193         if len(fragment_hits) == 1:
 194             #anchor = fragment_hits[0]['fragment']
 195             #frag = Fragment.objects.get(anchor=anchor)
 196             return HttpResponseRedirect(fragment_hits[0]['fragment'].get_absolute_url())
 197         return HttpResponseRedirect(results[0].book.get_absolute_url())
 198     elif len(results) == 0:
 199         form = PublishingSuggestForm(initial={"books": query + ", "})
 200         return render_to_response('catalogue/search_no_hits.html',
 201                                   {'tags': tags,
 202                                    'prefix': query,
 203                                    "form": form,
 204                                    'did_you_mean': suggestion},
 205             context_instance=RequestContext(request))
 206
 207     return render_to_response('catalogue/search_multiple_hits.html',
 208                               {'tags': tags,
 209                                'prefix': query,
 210                                'results': {'author': author_results,
 211                                            'title': title_results,
 212                                            'content': text_phrase,
 213                                            'other': everywhere},
 214                                'did_you_mean': suggestion},
 215         context_instance=RequestContext(request))