X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/f109b7f6e35d54281f1edf4b684c49db621d36c5..16cd04fd9a99685907cdbabda5d192221ff5268c:/apps/search/views.py diff --git a/apps/search/views.py b/apps/search/views.py index 5ed610705..881815da1 100644 --- a/apps/search/views.py +++ b/apps/search/views.py @@ -1,27 +1,253 @@ +# -*- 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.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('pl_PL') + + +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 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? - srch = MultiSearch() 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))