-def main(request):
-    query = request.GET.get('q', '')
-    if len(query) < 2:
-        return render_to_response(
-            'catalogue/search_too_short.html', {'prefix': query},
-            context_instance=RequestContext(request))
-    elif len(query) > 256:
-        return render_to_response(
-            'catalogue/search_too_long.html', {'prefix': query}, context_instance=RequestContext(request))
-
-    query = prepare_query(query)
-    pd_authors = search_pd_authors(query)
-    books = search_books(query)
-    pictures = search_pictures(query)
-    suggestion = u''
-
-    if not (books or pictures or pd_authors):
-        form = PublishingSuggestForm(initial={"books": query + ", "})
-        return render_to_response(
-            'catalogue/search_no_hits.html',
-            {
-                'form': form,
-                'did_you_mean': suggestion
-            },
-            context_instance=RequestContext(request))
-
-    if not (books or pictures) and len(pd_authors) == 1:
-        return HttpResponseRedirect(pd_authors[0].get_absolute_url())
-
-    return render_to_response(
-        'catalogue/search_multiple_hits.html',
-        {
-            'pd_authors': pd_authors,
-            'books': books,
-            'pictures': pictures,
-            'did_you_mean': suggestion
-        },
-        context_instance=RequestContext(request))
-
-
-def search_books(query):
-    search = Search()
-    results_parts = []
-    search_fields = []
-    words = query.split()
-    fieldsets = (
-        (['authors', 'authors_nonstem'], True),
-        (['title', 'title_nonstem'], True),
-        (['metadata', 'metadata_nonstem'], True),
-        (['text', 'text_nonstem', 'themes_pl', 'themes_pl_nonstem'], False),
-    )
-    for fields, is_book in fieldsets:
-        search_fields += fields
-        results_parts.append(search.search_words(words, search_fields, required=fields, book=is_book))
-    results = []
-    ids_results = {}
-    for results_part in results_parts:
-        for result in sorted(SearchResult.aggregate(results_part), reverse=True):
-            book_id = result.book_id
-            if book_id in ids_results:
-                ids_results[book_id].merge(result)
-            else:
-                results.append(result)
-                ids_results[book_id] = result
-    descendant_ids = set(
-        Book.objects.filter(id__in=ids_results, ancestor__in=ids_results).values_list('id', flat=True))
-    results = [result for result in results if result.book_id not in descendant_ids]
-    for result in results:
-        search.get_snippets(result, query, num=3)
-
-    def ensure_exists(r):
-        try:
-            return r.book
-        except Book.DoesNotExist:
-            return False
-
-    results = filter(ensure_exists, results)
-    return results
-
-
-def search_pictures(query):
-    search = Search()
-    results_parts = []
-    search_fields = []
-    words = query.split()
-    fieldsets = (
-        (['authors', 'authors_nonstem'], True),
-        (['title', 'title_nonstem'], True),
-        (['metadata', 'metadata_nonstem'], True),
-        (['themes_pl', 'themes_pl_nonstem'], False),
-    )
-    for fields, is_book in fieldsets:
-        search_fields += fields
-        results_parts.append(search.search_words(words, search_fields, required=fields, book=is_book, picture=True))
-    results = []
-    ids_results = {}
-    for results_part in results_parts:
-        for result in sorted(PictureResult.aggregate(results_part), reverse=True):
-            picture_id = result.picture_id
-            if picture_id in ids_results:
-                ids_results[picture_id].merge(result)
-            else:
-                results.append(result)
-                ids_results[picture_id] = result
-
-    def ensure_exists(r):
-        try:
-            return r.picture
-        except Picture.DoesNotExist:
-            return False
-
-    results = filter(ensure_exists, results)
-    return results
-
-
-def search_pd_authors(query):
-    pd_authors = Author.objects.filter(name__icontains=query)
-    existing_slugs = Tag.objects.filter(
-        category='author', slug__in=list(pd_authors.values_list('slug', flat=True))) \
-        .values_list('slug', flat=True)
-    pd_authors = pd_authors.exclude(slug__in=existing_slugs)
-    return pd_authors
-
-
-def prepare_query(query):
-    query = ' '.join(query.split())
-    # filter out private use characters
-    import unicodedata
-    query = ''.join(ch for ch in query if unicodedata.category(ch) != 'Co')
-    query = remove_query_syntax_chars(query)
-
-    words = query.split()
-    if len(words) > 10:
-        query = ' '.join(words[:10])
-    return query