Some cleaning.

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

diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py
index 1be05b4..f47329a 100644 (file)
--- a/apps/catalogue/views.py
+++ b/apps/catalogue/views.py
@@ -1,118 +1,324 @@
 # -*- coding: utf-8 -*-
 # -*- coding: utf-8 -*-

-import tempfile
-import zipfile
-
+# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
+# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
+#
+from collections import OrderedDict
+import re
+
+from django.conf import settings
+from django.core.cache import get_cache

 from django.template import RequestContext
 from django.template import RequestContext

+from django.template.loader import render_to_string

 from django.shortcuts import render_to_response, get_object_or_404
 from django.shortcuts import render_to_response, get_object_or_404

-from django.http import HttpResponse, HttpResponseRedirect, Http404
+from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect, JsonResponse

 from django.core.urlresolvers import reverse
 from django.db.models import Q
 from django.core.urlresolvers import reverse
 from django.db.models import Q

-from django.contrib.auth.decorators import login_required
-from django.utils.datastructures import SortedDict
-from django.views.decorators.http import require_POST
-from django.contrib import auth
-from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
-from django.utils import simplejson
-from django.utils.functional import Promise
-from django.utils.encoding import force_unicode
-from django.views.decorators import cache
-from django.core.servers.basehttp import FileWrapper
+from django.contrib.auth.decorators import login_required, user_passes_test
+from django.utils.http import urlquote_plus
+from django.utils import translation
+from django.utils.translation import get_language, ugettext as _, ugettext_lazy
+from django.views.decorators.vary import vary_on_headers

 
 

+from ajaxable.utils import AjaxableFormView

 from catalogue import models
 from catalogue import forms
 from catalogue import models
 from catalogue import forms

-from catalogue.utils import split_tags
-from newtagging import views as newtagging_views
-
-
-class LazyEncoder(simplejson.JSONEncoder):
-    def default(self, obj):
-        if isinstance(obj, Promise):
-            return force_unicode(obj)
-        return obj
-
-
-@cache.cache_control(must_revalidate=True, max_age=3600)
-def main_page(request):    
-    if request.user.is_authenticated():
-        shelves = models.Tag.objects.filter(category='set', user=request.user)
-        new_set_form = forms.NewSetForm()
-    extra_where = 'NOT catalogue_tag.category = "set"'
-    tags = models.Tag.objects.usage_for_model(models.Book, counts=True, extra={'where': [extra_where]})
-    fragment_tags = models.Tag.objects.usage_for_model(models.Fragment, counts=True,
-        extra={'where': ['catalogue_tag.category = "theme"'] + [extra_where]})
-    categories = split_tags(tags)
-    
-    form = forms.SearchForm()
-    return render_to_response('catalogue/main_page.html', locals(),
-        context_instance=RequestContext(request))
+from .helpers import get_related_tags, get_fragment_related_tags, tags_usage_for_books, tags_usage_for_works, tags_usage_for_fragments
+from catalogue.utils import split_tags, MultiQuerySet, SortedMultiQuerySet
+from catalogue.templatetags.catalogue_tags import tag_list, collection_list
+from pdcounter import models as pdcounter_models
+from pdcounter import views as pdcounter_views
+from suggest.forms import PublishingSuggestForm
+from picture.models import Picture, PictureArea
+from picture.views import picture_list_thumb
+
+staff_required = user_passes_test(lambda user: user.is_staff)
+permanent_cache = get_cache('permanent')
+
+
+@vary_on_headers('X-Requested-With')
+def catalogue(request):
+    #cache_key = 'catalogue.catalogue/' + get_language()
+    #output = permanent_cache.get(cache_key)
+    output = None
+
+    if output is None:
+        common_categories = ('author',)
+        split_categories = ('epoch', 'genre', 'kind')
+
+        categories = split_tags(tags_usage_for_works(common_categories))
+        book_categories = split_tags(tags_usage_for_books(split_categories))
+        picture_categories = split_tags(
+            models.Tag.objects.usage_for_model(Picture, counts=True).filter(
+                category__in=split_categories))
+        # we want global usage for themes
+        fragment_tags = list(tags_usage_for_fragments(('theme',)))
+        collections = models.Collection.objects.all()
+
+        render_tag_list = lambda x: render_to_string(
+            'catalogue/tag_list.html', tag_list(x))
+
+        def render_split(with_books, with_pictures):
+            ctx = {}
+            if with_books:
+                ctx['books'] = render_tag_list(with_books)
+            if with_pictures:
+                ctx['pictures'] = render_tag_list(with_pictures)
+            return render_to_string('catalogue/tag_list_split.html', ctx)
+
+        output = {}
+        output['theme'] = render_tag_list(fragment_tags)
+        for category in common_categories:
+            output[category] = render_tag_list(categories.get(category, []))
+        for category in split_categories:
+            output[category] = render_split(
+                book_categories.get(category, []),
+                picture_categories.get(category, []))
+
+        output['collections'] = render_to_string(
+            'catalogue/collection_list.html', collection_list(collections))
+        #permanent_cache.set(cache_key, output)
+    if request.is_ajax():
+        return JsonResponse(output)
+    else:
+        return render_to_response('catalogue/catalogue.html', locals(),
+            context_instance=RequestContext(request))

 
 
 
 

-def book_list(request):
-    books = models.Book.objects.all()
-    form = forms.SearchForm()
-    
-    books_by_first_letter = SortedDict()
-    for book in books:
-        books_by_first_letter.setdefault(book.title[0], []).append(book)
-    
-    return render_to_response('catalogue/book_list.html', locals(),
+def book_list(request, filter=None, get_filter=None,
+        template_name='catalogue/book_list.html',
+        nav_template_name='catalogue/snippets/book_list_nav.html',
+        list_template_name='catalogue/snippets/book_list.html',
+        cache_key='catalogue.book_list',
+        context=None,
+        ):
+    """ generates a listing of all books, optionally filtered with a test function """
+    cache_key = "%s/%s" % (cache_key, get_language())
+    cached = permanent_cache.get(cache_key)
+    if cached is not None:
+        rendered_nav, rendered_book_list = cached
+    else:
+        if get_filter:
+            filter = get_filter()
+        books_by_author, orphans, books_by_parent = models.Book.book_list(filter)
+        books_nav = OrderedDict()
+        for tag in books_by_author:
+            if books_by_author[tag]:
+                books_nav.setdefault(tag.sort_key[0], []).append(tag)
+        rendered_nav = render_to_string(nav_template_name, locals())
+        rendered_book_list = render_to_string(list_template_name, locals())
+        permanent_cache.set(cache_key, (rendered_nav, rendered_book_list))
+    return render_to_response(template_name, locals(),

         context_instance=RequestContext(request))
 
 
         context_instance=RequestContext(request))
 
 

-@cache.cache_control(must_revalidate=True, max_age=3600)
+def audiobook_list(request):
+    return book_list(request, Q(media__type='mp3') | Q(media__type='ogg'),
+                     template_name='catalogue/audiobook_list.html',
+                     list_template_name='catalogue/snippets/audiobook_list.html',
+                     cache_key='catalogue.audiobook_list')
+
+
+def daisy_list(request):
+    return book_list(request, Q(media__type='daisy'),
+                     template_name='catalogue/daisy_list.html',
+                     cache_key='catalogue.daisy_list')
+
+
+def collection(request, slug):
+    coll = get_object_or_404(models.Collection, slug=slug)
+    if coll.kind == 'book':
+        view = book_list
+        tmpl = "catalogue/collection.html"
+    elif coll.kind == 'picture':
+        view = picture_list_thumb
+        tmpl = "picture/collection.html"
+    else:
+        raise ValueError('How do I show this kind of collection? %s' % coll.kind)
+    return view(request, get_filter=coll.get_query,
+                     template_name=tmpl,
+                     cache_key='catalogue.collection:%s' % coll.slug,
+                     context={'collection': coll})
+
+
+def differentiate_tags(request, tags, ambiguous_slugs):
+    beginning = '/'.join(tag.url_chunk for tag in tags)
+    unparsed = '/'.join(ambiguous_slugs[1:])
+    options = []
+    for tag in models.Tag.objects.filter(slug=ambiguous_slugs[0]):
+        options.append({
+            'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
+            'tags': [tag]
+        })
+    return render_to_response('catalogue/differentiate_tags.html',
+                {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]},
+                context_instance=RequestContext(request))
+
+
+# TODO: Rewrite this hellish piece of code which tries to do everything

 def tagged_object_list(request, tags=''):
 def tagged_object_list(request, tags=''):

-    # Prevent DoS attacks on our database
-    if len(tags.split('/')) > 6:
-        raise Http404
-        
+    # preliminary tests and conditions

     try:
         tags = models.Tag.get_tag_list(tags)
     except models.Tag.DoesNotExist:
     try:
         tags = models.Tag.get_tag_list(tags)
     except models.Tag.DoesNotExist:

+        # Perhaps the user is asking about an author in Public Domain
+        # counter (they are not represented in tags)
+        chunks = tags.split('/')
+        if len(chunks) == 2 and chunks[0] == 'autor':
+            return pdcounter_views.author_detail(request, chunks[1])
+        else:
+            raise Http404
+    except models.Tag.MultipleObjectsReturned, e:
+        # Ask the user to disambiguate
+        return differentiate_tags(request, e.tags, e.ambiguous_slugs)
+    except models.Tag.UrlDeprecationWarning, e:
+        return HttpResponsePermanentRedirect(reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)]))
+
+    try:
+        if len(tags) > settings.MAX_TAG_LIST:
+            raise Http404
+    except AttributeError:
+        pass
+
+    if len([tag for tag in tags if tag.category == 'book']):

         raise Http404
         raise Http404

-    
-    model = models.Book
-    shelf_is_set = (len(tags) == 1 and tags[0].category == 'set')
-    theme_is_set = len([tag for tag in tags if tag.category == 'theme']) > 0
+
+    # beginning of digestion
+    theme_is_set = [tag for tag in tags if tag.category == 'theme']
+    shelf_is_set = [tag for tag in tags if tag.category == 'set']
+    only_shelf = shelf_is_set and len(tags) == 1
+    only_my_shelf = only_shelf and request.user.is_authenticated() and request.user == tags[0].user
+
+
+    objects =  None
+    categories = {}
+    object_queries = []
+

     if theme_is_set:
     if theme_is_set:

-        model = models.Fragment
-
-    extra_where = 'NOT catalogue_tag.category = "set"'
-    related_tags = models.Tag.objects.related_for_model(tags, model, counts=True, extra={'where': [extra_where]})
-    categories = split_tags(related_tags)
-
-    if not theme_is_set:
-        model=models.Book.objects.filter(parent=None)
-    
-    return newtagging_views.tagged_object_list(
-        request,
-        tag_model=models.Tag,
-        queryset_or_model=model,
-        tags=tags,
-        template_name='catalogue/tagged_object_list.html',
-        extra_context = {'categories': categories, 'shelf_is_set': shelf_is_set },
-    )
+        shelf_tags = [tag for tag in tags if tag.category == 'set']
+        fragment_tags = [tag for tag in tags if tag.category != 'set']
+        fragments = models.Fragment.tagged.with_all(fragment_tags)
+        areas = PictureArea.tagged.with_all(fragment_tags)
+
+        if shelf_tags:
+            # FIXME: book tags here
+            books = models.Book.tagged.with_all(shelf_tags).order_by()
+            l_tags = models.Tag.objects.filter(category='book',
+                slug__in=[book.book_tag_slug() for book in books.iterator()])
+            fragments = models.Fragment.tagged.with_any(l_tags, fragments)
+
+        related_tags = get_fragment_related_tags(tags)
+        categories = split_tags(related_tags, categories)
+        object_queries.insert(0, fragments)
+
+        area_keys = [area.pk for area in areas.iterator()]
+        if area_keys:
+            related_tags = PictureArea.tags.usage(counts=True,
+                                                         filters={'pk__in': area_keys})
+            related_tags = (tag for tag in related_tags if tag not in fragment_tags)
+
+            categories = split_tags(related_tags, categories)
+
+        # we want the Pictures to go first
+        object_queries.insert(0, areas)
+        objects = MultiQuerySet(*object_queries)
+    else:
+        if shelf_is_set:
+            books = models.Book.tagged.with_all(tags).order_by(
+                'sort_key_author', 'title')
+        else:
+            books = models.Book.tagged_top_level(tags).order_by(
+                'sort_key_author', 'title')

 
 

+        pictures = Picture.tagged.with_all(tags).order_by(
+            'sort_key_author', 'title')

 
 

-def book_detail(request, slug):
+        categories = split_tags(get_related_tags(tags))
+
+        objects = SortedMultiQuerySet(pictures, books,
+            order_by=('sort_key_author', 'title'))
+
+
+    if not objects:
+        objects = models.Book.objects.none()
+
+    return render_to_response('catalogue/tagged_object_list.html',
+        {
+            'object_list': objects,
+            'categories': categories,
+            'only_shelf': only_shelf,
+            'only_my_shelf': only_my_shelf,
+            'formats_form': forms.DownloadFormatsForm(),
+            'tags': tags,
+            'theme_is_set': theme_is_set,
+        },
+        context_instance=RequestContext(request))
+
+
+def book_fragments(request, slug, theme_slug):

     book = get_object_or_404(models.Book, slug=slug)
     book = get_object_or_404(models.Book, slug=slug)

-    tags = list(book.tags.filter(~Q(category='set')))
-    categories = split_tags(tags)
-    book_children = book.children.all().order_by('parent_number')
-    
-    form = forms.SearchForm()
+    theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme')
+    fragments = models.Fragment.tagged.with_all([theme]).filter(
+        Q(book=book) | Q(book__ancestor=book))
+
+    return render_to_response('catalogue/book_fragments.html', locals(),
+        context_instance=RequestContext(request))
+
+
+def book_detail(request, slug):
+    try:
+        book = models.Book.objects.get(slug=slug)
+    except models.Book.DoesNotExist:
+        return pdcounter_views.book_stub_detail(request, slug)
+
+    book_children = book.children.all().order_by('parent_number', 'sort_key')

     return render_to_response('catalogue/book_detail.html', locals(),
         context_instance=RequestContext(request))
 
 
     return render_to_response('catalogue/book_detail.html', locals(),
         context_instance=RequestContext(request))
 
 

+def player(request, slug):
+    book = get_object_or_404(models.Book, slug=slug)
+    if not book.has_media('mp3'):
+        raise Http404
+
+    ogg_files = {}
+    for m in book.media.filter(type='ogg').order_by().iterator():
+        ogg_files[m.name] = m
+
+    audiobooks = []
+    have_oggs = True
+    projects = set()
+    for mp3 in book.media.filter(type='mp3').iterator():
+        # ogg files are always from the same project
+        meta = mp3.extra_info
+        project = meta.get('project')
+        if not project:
+            # temporary fallback
+            project = u'CzytamySłuchając'
+
+        projects.add((project, meta.get('funded_by', '')))
+
+        media = {'mp3': mp3}
+
+        ogg = ogg_files.get(mp3.name)
+        if ogg:
+            media['ogg'] = ogg
+        else:
+            have_oggs = False
+        audiobooks.append(media)
+
+    projects = sorted(projects)
+
+    extra_info = book.extra_info
+
+    return render_to_response('catalogue/player.html', locals(),
+        context_instance=RequestContext(request))
+
+

 def book_text(request, slug):
     book = get_object_or_404(models.Book, slug=slug)
 def book_text(request, slug):
     book = get_object_or_404(models.Book, slug=slug)

-    book_themes = {}
-    for fragment in book.fragments.all():
-        for theme in fragment.tags.filter(category='theme'):
-            book_themes.setdefault(theme, []).append(fragment)
-    
-    book_themes = book_themes.items()
-    book_themes.sort(key=lambda s: s[0].sort_key)
+
+    if not book.has_html_file():
+        raise Http404

     return render_to_response('catalogue/book_text.html', locals(),
         context_instance=RequestContext(request))
 
     return render_to_response('catalogue/book_text.html', locals(),
         context_instance=RequestContext(request))
 


@@ -120,190 +326,280 @@ def book_text(request, slug):
 # ==========
 # = Search =
 # ==========
 # ==========
 # = Search =
 # ==========

-def search(request):
-    query = request.GET.get('q', '')
-    tags = request.GET.get('tags', '')
-    if tags == '':
-        tags = []

 
 

-    try:
-        tag_list = models.Tag.get_tag_list(tags)
-        tag = models.Tag.objects.get(name=query)
-    except models.Tag.DoesNotExist:
-        try:
-            book = models.Book.objects.get(title=query)
-            return HttpResponseRedirect(book.get_absolute_url())
-        except models.Book.DoesNotExist:
-            return HttpResponseRedirect(reverse('catalogue.views.main_page'))
-    else:
-        tag_list.append(tag)
-        return HttpResponseRedirect(reverse('catalogue.views.tagged_object_list', 
-            kwargs={'tags': '/'.join(tag.slug for tag in tag_list)}
-        ))
+def _no_diacritics_regexp(query):
+    """ returns a regexp for searching for a query without diacritics

 
 

+    should be locale-aware """
+    names = {
+        u'a':u'aąĄ', u'c':u'cćĆ', u'e':u'eęĘ', u'l': u'lłŁ', u'n':u'nńŃ', u'o':u'oóÓ', u's':u'sśŚ', u'z':u'zźżŹŻ',
+        u'ą':u'ąĄ', u'ć':u'ćĆ', u'ę':u'ęĘ', u'ł': u'łŁ', u'ń':u'ńŃ', u'ó':u'óÓ', u'ś':u'śŚ', u'ź':u'źŹ', u'ż':u'żŻ'
+        }
+    def repl(m):
+        l = m.group()
+        return u"(%s)" % '|'.join(names[l])
+    return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)

 
 

-def tags_starting_with(request):
-    try:
-        prefix = request.GET['q']
-        if len(prefix) < 2:
-            raise KeyError
-
-        books = models.Book.objects.filter(title__icontains=prefix)
-        tags = models.Tag.objects.filter(name__icontains=prefix)
-        if request.user.is_authenticated():
-            tags = tags.filter(~Q(category='set') | Q(user=request.user))
-        else:
-            tags = tags.filter(~Q(category='set'))
+def unicode_re_escape(query):
+    """ Unicode-friendly version of re.escape """
+    return re.sub('(?u)(\W)', r'\\\1', query)

 
 

-        completions = [book.title for book in books] + [tag.name for tag in tags]
+def _word_starts_with(name, prefix):
+    """returns a Q object getting models having `name` contain a word
+    starting with `prefix`

 
 

-        return HttpResponse('\n'.join(completions))    
+    We define word characters as alphanumeric and underscore, like in JS.

 
 

-    except KeyError:
-        return HttpResponse('')
+    Works for MySQL, PostgreSQL, Oracle.
+    For SQLite, _sqlite* version is substituted for this.
+    """
+    kwargs = {}

 
 

+    prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
+    # can't use [[:<:]] (word start),
+    # but we want both `xy` and `(xy` to catch `(xyz)`
+    kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix

 
 

-# ====================
-# = Shelf management =
-# ====================
-@login_required
-@cache.never_cache
-def user_shelves(request):
-    shelves = models.Tag.objects.filter(category='set', user=request.user)
-    new_set_form = forms.NewSetForm()
-    return render_to_response('catalogue/user_shelves.html', locals(),
-            context_instance=RequestContext(request))
+    return Q(**kwargs)

 
 
 
 

-@cache.never_cache
-def book_sets(request, slug):
-    book = get_object_or_404(models.Book, slug=slug)
-    user_sets = models.Tag.objects.filter(category='set', user=request.user)
-    book_sets = book.tags.filter(category='set', user=request.user)
-    
-    if not request.user.is_authenticated():
-        return HttpResponse('<p>Aby zarządzać swoimi półkami, musisz się zalogować.</p>')
-    
-    if request.method == 'POST':
-        form = forms.ObjectSetsForm(book, request.user, request.POST)
-        if form.is_valid():
-            book.tags = ([models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']] +
-                list(book.tags.filter(~Q(category='set') | ~Q(user=request.user))))
-            if request.is_ajax():
-                return HttpResponse('<p>Półki zostały zapisane.</p>')
-            else:
-                return HttpResponseRedirect('/')
+def _word_starts_with_regexp(prefix):
+    prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
+    return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
+
+
+def _sqlite_word_starts_with(name, prefix):
+    """ version of _word_starts_with for SQLite
+
+    SQLite in Django uses Python re module
+    """
+    kwargs = {}
+    kwargs['%s__iregex' % name] = _word_starts_with_regexp(prefix)
+    return Q(**kwargs)
+
+
+if hasattr(settings, 'DATABASES'):
+    if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
+        _word_starts_with = _sqlite_word_starts_with
+elif settings.DATABASE_ENGINE == 'sqlite3':
+    _word_starts_with = _sqlite_word_starts_with
+
+
+class App():
+    def __init__(self, name, view):
+        self.name = name
+        self._view = view
+        self.lower = name.lower()
+        self.category = 'application'
+    def view(self):
+        return reverse(*self._view)
+
+_apps = (
+    App(u'Leśmianator', (u'lesmianator', )),
+    )
+
+
+def _tags_starting_with(prefix, user=None):
+    prefix = prefix.lower()
+    # PD counter
+    book_stubs = pdcounter_models.BookStub.objects.filter(_word_starts_with('title', prefix))
+    authors = pdcounter_models.Author.objects.filter(_word_starts_with('name', prefix))
+
+    books = models.Book.objects.filter(_word_starts_with('title', prefix))
+    tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
+    if user and user.is_authenticated():
+        tags = tags.filter(~Q(category='set') | Q(user=user))

     else:
     else:

-        form = forms.ObjectSetsForm(book, request.user)
-        new_set_form = forms.NewSetForm()
-    
-    return render_to_response('catalogue/book_sets.html', locals(),
-        context_instance=RequestContext(request))
+        tags = tags.exclude(category='set')
+
+    prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
+    return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + list(authors)
+
+
+def _get_result_link(match, tag_list):
+    if isinstance(match, models.Tag):
+        return reverse('catalogue.views.tagged_object_list',
+            kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
+        )
+    elif isinstance(match, App):
+        return match.view()
+    else:
+        return match.get_absolute_url()
+
+
+def _get_result_type(match):
+    if isinstance(match, models.Book) or isinstance(match, pdcounter_models.BookStub):
+        type = 'book'
+    else:
+        type = match.category
+    return type
+
+
+def books_starting_with(prefix):
+    prefix = prefix.lower()
+    return models.Book.objects.filter(_word_starts_with('title', prefix))

 
 
 
 

-@cache.never_cache
-def download_shelf(request, slug):
-    """"
-    Create a ZIP archive on disk and transmit it in chunks of 8KB,
-    without loading the whole file into memory. A similar approach can
-    be used for large dynamic PDF files.                                        
+def find_best_matches(query, user=None):
+    """ Finds a models.Book, Tag, models.BookStub or Author best matching a query.
+
+    Returns a with:
+      - zero elements when nothing is found,
+      - one element when a best result is found,
+      - more then one element on multiple exact matches
+
+    Raises a ValueError on too short a query.

     """
     """

-    shelf = get_object_or_404(models.Tag, slug=slug, category='set')
-    
-    from StringIO import StringIO
-    
-    
-    # Create a ZIP archive
-    temp = temp = tempfile.TemporaryFile()
-    archive = zipfile.ZipFile(temp, 'w')
-    for book in models.Book.tagged.with_all(shelf):
-        if book.pdf_file:
-            filename = book.pdf_file.path
-            print filename
-            archive.write(filename, str('%s.pdf' % book.slug))
-        if book.odt_file:
-            filename = book.odt_file.path
-            print filename
-            archive.write(filename, str('%s.odt' % book.slug))
-        if book.txt_file:
-            filename = book.txt_file.path
-            print filename
-            archive.write(filename, str('%s.txt' % book.slug))
-    archive.close()
-    
-    response = HttpResponse(content_type='application/zip', mimetype='application/x-zip-compressed')
-    response['Content-Disposition'] = 'attachment; filename=%s.zip' % shelf.sort_key
-    response['Content-Length'] = temp.tell()
-    temp.seek(0)
-    response.write(temp.read())
-
-    return response

 
 

+    query = query.lower()
+    if len(query) < 2:
+        raise ValueError("query must have at least two characters")
+
+    result = tuple(_tags_starting_with(query, user))
+    # remove pdcounter stuff
+    book_titles = set(match.pretty_title().lower() for match in result
+                      if isinstance(match, models.Book))
+    authors = set(match.name.lower() for match in result
+                  if isinstance(match, models.Tag) and match.category == 'author')
+    result = tuple(res for res in result if not (
+                 (isinstance(res, pdcounter_models.BookStub) and res.pretty_title().lower() in book_titles)
+                 or (isinstance(res, pdcounter_models.Author) and res.name.lower() in authors)
+             ))
+
+    exact_matches = tuple(res for res in result if res.name.lower() == query)
+    if exact_matches:
+        return exact_matches
+    else:
+        return tuple(result)[:1]

 
 

-@login_required
-@require_POST
-@cache.never_cache
-def new_set(request):
-    new_set_form = forms.NewSetForm(request.POST)
-    if new_set_form.is_valid():
-        new_set = new_set_form.save(request.user)
-
-        if request.is_ajax():
-            return HttpResponse(u'<p>Półka <strong>%s</strong> została utworzona</p>' % new_set)
-        else:
-            return HttpResponseRedirect('/')

 
 

-    return render_to_response('catalogue/book_sets.html', locals(),
+def search(request):
+    tags = request.GET.get('tags', '')
+    prefix = request.GET.get('q', '')
+
+    try:
+        tag_list = models.Tag.get_tag_list(tags)
+    except:
+        tag_list = []
+
+    try:
+        result = find_best_matches(prefix, request.user)
+    except ValueError:
+        return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},

             context_instance=RequestContext(request))
 
             context_instance=RequestContext(request))
 

+    if len(result) == 1:
+        return HttpResponseRedirect(_get_result_link(result[0], tag_list))
+    elif len(result) > 1:
+        return render_to_response('catalogue/search_multiple_hits.html',
+            {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
+            context_instance=RequestContext(request))
+    else:
+        form = PublishingSuggestForm(initial={"books": prefix + ", "})
+        return render_to_response('catalogue/search_no_hits.html',
+            {'tags':tag_list, 'prefix':prefix, "pubsuggest_form": form},
+            context_instance=RequestContext(request))

 
 

-@login_required
-@require_POST
-@cache.never_cache
-def delete_shelf(request, slug):
-    user_set = get_object_or_404(models.Tag, slug=slug, category='set', user=request.user)
-    user_set.delete()

 
 

-    if request.is_ajax():
-        return HttpResponse(u'<p>Półka <strong>%s</strong> została usunięta</p>' % user_set.name)
+def tags_starting_with(request):
+    prefix = request.GET.get('q', '')
+    # Prefix must have at least 2 characters
+    if len(prefix) < 2:
+        return HttpResponse('')
+    tags_list = []
+    result = ""
+    for tag in _tags_starting_with(prefix, request.user):
+        if not tag.name in tags_list:
+            result += "\n" + tag.name
+            tags_list.append(tag.name)
+    return HttpResponse(result)
+
+def json_tags_starting_with(request, callback=None):
+    # Callback for JSONP
+    prefix = request.GET.get('q', '')
+    callback = request.GET.get('callback', '')
+    # Prefix must have at least 2 characters
+    if len(prefix) < 2:
+        return HttpResponse('')
+    tags_list = []
+    for tag in _tags_starting_with(prefix, request.user):
+        if not tag.name in tags_list:
+            tags_list.append(tag.name)
+    if request.GET.get('mozhint', ''):
+        result = [prefix, tags_list]

     else:
     else:

-        return HttpResponseRedirect('/')
-
-
-# ==================
-# = Authentication =
-# ==================
-@require_POST
-@cache.never_cache
-def login(request):
-    form = AuthenticationForm(data=request.POST, prefix='login')
-    if form.is_valid():
-        auth.login(request, form.get_user())
-        response_data = {'success': True, 'errors': {}}
+        result = {"matches": tags_list}
+    return JsonResponse(result, callback)
+
+
+# =========
+# = Admin =
+# =========
+@login_required
+@staff_required
+def import_book(request):
+    """docstring for import_book"""
+    book_import_form = forms.BookImportForm(request.POST, request.FILES)
+    if book_import_form.is_valid():
+        try:
+            book_import_form.save()
+        except:
+            import sys
+            import pprint
+            import traceback
+            info = sys.exc_info()
+            exception = pprint.pformat(info[1])
+            tb = '\n'.join(traceback.format_tb(info[2]))
+            return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
+        return HttpResponse(_("Book imported successfully"))

     else:
     else:

-        response_data = {'success': False, 'errors': form.errors}
-    return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
-
-
-@require_POST
-@cache.never_cache
-def register(request):
-    registration_form = UserCreationForm(request.POST, prefix='registration')
-    if registration_form.is_valid():
-        user = registration_form.save()
-        user = auth.authenticate(
-            username=registration_form.cleaned_data['username'], 
-            password=registration_form.cleaned_data['password1']
-        )
-        auth.login(request, user)
-        response_data = {'success': True, 'errors': {}}
+        return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
+
+
+# info views for API
+
+def book_info(request, id, lang='pl'):
+    book = get_object_or_404(models.Book, id=id)
+    # set language by hand
+    translation.activate(lang)
+    return render_to_response('catalogue/book_info.html', locals(),
+        context_instance=RequestContext(request))
+
+
+def tag_info(request, id):
+    tag = get_object_or_404(models.Tag, id=id)
+    return HttpResponse(tag.description)
+
+
+def download_zip(request, format, slug=None):
+    url = None
+    if format in models.Book.ebook_formats:
+        url = models.Book.zip_format(format)
+    elif format in ('mp3', 'ogg') and slug is not None:
+        book = get_object_or_404(models.Book, slug=slug)
+        url = book.zip_audiobooks(format)

     else:
     else:

-        response_data = {'success': False, 'errors': registration_form.errors}
-    return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
+        raise Http404('No format specified for zip package')
+    return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
+
+
+class CustomPDFFormView(AjaxableFormView):
+    form_class = forms.CustomPDFForm
+    title = ugettext_lazy('Download custom PDF')
+    submit = ugettext_lazy('Download')
+    honeypot = True
+
+    def __call__(self, *args, **kwargs):
+        if settings.NO_CUSTOM_PDF:
+            raise Http404('Custom PDF is disabled')
+        return super(CustomPDFFormView, self).__call__(*args, **kwargs)

 
 

+    def form_args(self, request, obj):
+        """Override to parse view args and give additional args to the form."""
+        return (obj,), {}

 
 

-@cache.never_cache
-def logout_then_redirect(request):
-    auth.logout(request)
-    return HttpResponseRedirect(request.GET.get('next', '/'))
+    def get_object(self, request, slug, *args, **kwargs):
+        return get_object_or_404(models.Book, slug=slug)

 
 

+    def context_description(self, request, obj):
+        return obj.pretty_title()