X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/22a9e609d7f00bac9d88306d3c9f4cf3bd244dee..357027375ff8867f42ca34bcbfb5a78b5b185fc3:/apps/catalogue/views.py

diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py
deleted file mode 100644
index 088d0eee6..000000000
--- a/apps/catalogue/views.py
+++ /dev/null
@@ -1,692 +0,0 @@
-# -*- coding: utf-8 -*-
-# This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
-# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
-#
-import tempfile
-import zipfile
-import sys
-import pprint
-import traceback
-import re
-import itertools
-from operator import itemgetter
-
-from django.conf import settings
-from django.template import RequestContext
-from django.shortcuts import render_to_response, get_object_or_404
-from django.http import HttpResponse, HttpResponseRedirect, Http404
-from django.core.urlresolvers import reverse
-from django.db.models import Q
-from django.contrib.auth.decorators import login_required, user_passes_test
-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.utils.http import urlquote_plus
-from django.views.decorators import cache
-from django.utils.translation import ugettext as _
-from django.views.generic.list_detail import object_list
-
-from catalogue import models
-from catalogue import forms
-from catalogue.utils import split_tags
-from newtagging import views as newtagging_views
-
-
-staff_required = user_passes_test(lambda user: user.is_staff)
-
-
-class LazyEncoder(simplejson.JSONEncoder):
-    def default(self, obj):
-        if isinstance(obj, Promise):
-            return force_unicode(obj)
-        return obj
-
-# shortcut for JSON reponses
-class JSONResponse(HttpResponse):
-    def __init__(self, data={}, callback=None, **kwargs):
-        # get rid of mimetype
-        kwargs.pop('mimetype', None)
-        data = simplejson.dumps(data)
-        if callback:
-            data = callback + "(" + data + ");" 
-        super(JSONResponse, self).__init__(data, mimetype="application/json", **kwargs)
-
-
-def main_page(request):
-    if request.user.is_authenticated():
-        shelves = models.Tag.objects.filter(category='set', user=request.user)
-        new_set_form = forms.NewSetForm()
-
-    tags = models.Tag.objects.exclude(category__in=('set', 'book'))
-    for tag in tags:
-        tag.count = tag.get_count()
-    categories = split_tags(tags)
-    fragment_tags = categories.get('theme', [])
-
-    form = forms.SearchForm()
-    return render_to_response('catalogue/main_page.html', locals(),
-        context_instance=RequestContext(request))
-
-
-def book_list(request):
-    form = forms.SearchForm()
-
-    books_by_parent = {}
-    for book in models.Book.objects.all().order_by('parent_number'):
-        books_by_parent.setdefault(book.parent, []).append(book)
-
-    orphans = []
-    books_by_author = SortedDict()
-    books_nav = SortedDict()
-    for tag in models.Tag.objects.filter(category='author'):
-        books_by_author[tag] = []
-        if books_nav.has_key(tag.sort_key[0]):
-            books_nav[tag.sort_key[0]].append(tag)
-        else:
-            books_nav[tag.sort_key[0]] = [tag]
-
-    for book in books_by_parent[None]:
-        authors = list(book.tags.filter(category='author'))
-        if authors:
-            for author in authors:
-                books_by_author[author].append(book)
-        else:
-            orphans.append(book)
-
-    return render_to_response('catalogue/book_list.html', locals(),
-        context_instance=RequestContext(request))
-
-
-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.exclude(category='book').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))
-
-
-def tagged_object_list(request, tags=''):
-    try:
-        tags = models.Tag.get_tag_list(tags)
-    except models.Tag.DoesNotExist:
-        raise Http404
-    except models.Tag.MultipleObjectsReturned, e:
-        return differentiate_tags(request, e.tags, e.ambiguous_slugs)
-
-    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
-
-    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 = only_author = pd_counter = None
-    categories = {}
-
-    if theme_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)
-
-        if shelf_tags:
-            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])
-            fragments = models.Fragment.tagged.with_any(l_tags, fragments)
-
-        # newtagging goes crazy if we just try:
-        #related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True,
-        #                    extra={'where': ["catalogue_tag.category != 'book'"]})
-        fragment_keys = [fragment.pk for fragment in fragments]
-        if fragment_keys:
-            related_tags = models.Fragment.tags.usage(counts=True,
-                                filters={'pk__in': fragment_keys},
-                                extra={'where': ["catalogue_tag.category != 'book'"]})
-            related_tags = (tag for tag in related_tags if tag not in fragment_tags)
-            categories = split_tags(related_tags)
-
-            objects = fragments
-    else:
-        # get relevant books and their tags
-        objects = models.Book.tagged.with_all(tags).order_by()
-        if not shelf_is_set:
-            # eliminate descendants
-            l_tags = models.Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in objects])
-            descendants_keys = [book.pk for book in models.Book.tagged.with_any(l_tags)]
-            if descendants_keys:
-                objects = objects.exclude(pk__in=descendants_keys)
-
-        # get related tags from `tag_counter` and `theme_counter`
-        related_counts = {}
-        tags_pks = [tag.pk for tag in tags]
-        for book in objects:
-            for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()):
-                if tag_pk in tags_pks:
-                    continue
-                related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
-        related_tags = models.Tag.objects.filter(pk__in=related_counts.keys())
-        related_tags = [tag for tag in related_tags if tag not in tags]
-        for tag in related_tags:
-            tag.count = related_counts[tag.pk]
-
-        categories = split_tags(related_tags)
-        del related_tags
-
-    if not objects:
-        only_author = len(tags) == 1 and tags[0].category == 'author'
-        pd_counter = only_author and tags[0].goes_to_pd()
-        objects = models.Book.objects.none()
-
-    return object_list(
-        request,
-        objects,
-        template_name='catalogue/tagged_object_list.html',
-        extra_context={
-            'categories': categories,
-            'only_shelf': only_shelf,
-            'only_author': only_author,
-            'pd_counter': pd_counter,
-            'only_my_shelf': only_my_shelf,
-            'formats_form': forms.DownloadFormatsForm(),
-
-            'tags': tags,
-        }
-    )
-
-
-def book_fragments(request, book_slug, theme_slug):
-    book = get_object_or_404(models.Book, slug=book_slug)
-    book_tag = get_object_or_404(models.Tag, slug='l-' + book_slug, category='book')
-    theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme')
-    fragments = models.Fragment.tagged.with_all([book_tag, theme])
-
-    form = forms.SearchForm()
-    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 book_stub_detail(request, slug)
-
-    book_tag = book.book_tag()
-    tags = list(book.tags.filter(~Q(category='set')))
-    categories = split_tags(tags)
-    book_children = book.children.all().order_by('parent_number')
-    
-    _book = book
-    parents = []
-    while _book.parent:
-        parents.append(_book.parent)
-        _book = _book.parent
-    parents = reversed(parents)
-
-    theme_counter = book.theme_counter
-    book_themes = models.Tag.objects.filter(pk__in=theme_counter.keys())
-    for tag in book_themes:
-        tag.count = theme_counter[tag.pk]
-
-    extra_info = book.get_extra_info_value()
-
-    form = forms.SearchForm()
-    return render_to_response('catalogue/book_detail.html', locals(),
-        context_instance=RequestContext(request))
-
-
-def book_stub_detail(request, slug):
-    book = get_object_or_404(models.BookStub, slug=slug)
-    pd_counter = book.pd
-    form = forms.SearchForm()
-
-    return render_to_response('catalogue/book_stub_detail.html', locals(),
-        context_instance=RequestContext(request))
-
-
-def book_text(request, slug):
-    book = get_object_or_404(models.Book, slug=slug)
-    if not book.has_html_file():
-        raise Http404
-    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)
-    return render_to_response('catalogue/book_text.html', locals(),
-        context_instance=RequestContext(request))
-
-
-# ==========
-# = Search =
-# ==========
-
-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 unicode_re_escape(query):
-    """ Unicode-friendly version of re.escape """
-    return re.sub('(?u)(\W)', r'\\\1', query)
-
-def _word_starts_with(name, prefix):
-    """returns a Q object getting models having `name` contain a word
-    starting with `prefix`
-
-    We define word characters as alphanumeric and underscore, like in JS.
-
-    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
-
-    return Q(**kwargs)
-
-
-def _sqlite_word_starts_with(name, prefix):
-    """ version of _word_starts_with for SQLite
-
-    SQLite in Django uses Python re module
-    """
-    kwargs = {}
-    prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
-    kwargs['%s__iregex' % name] = ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
-    return Q(**kwargs)
-
-
-if settings.DATABASE_ENGINE == 'sqlite3':
-    _word_starts_with = _sqlite_word_starts_with
-
-
-def _tags_starting_with(prefix, user=None):
-    prefix = prefix.lower()
-    book_stubs = models.BookStub.objects.filter(_word_starts_with('title', prefix))
-    books = models.Book.objects.filter(_word_starts_with('title', prefix))
-    book_stubs = filter(lambda x: x not in books, book_stubs)
-    tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
-    if user and user.is_authenticated():
-        tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
-    else:
-        tags = tags.filter(~Q(category='book') & ~Q(category='set'))
-    return list(books) + list(tags) + list(book_stubs)
-
-
-def _get_result_link(match, tag_list):
-    if isinstance(match, models.Book) or isinstance(match, models.BookStub):
-        return match.get_absolute_url()
-    else:
-        return reverse('catalogue.views.tagged_object_list',
-            kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
-        )
-
-def _get_result_type(match):
-    if isinstance(match, models.Book) or isinstance(match, models.BookStub):
-        type = 'book'
-    else:
-        type = match.category
-    return type
-
-
-
-def find_best_matches(query, user=None):
-    """ Finds a Book, Tag or Bookstub 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.
-    """
-
-    query = query.lower()
-    if len(query) < 2:
-        raise ValueError("query must have at least two characters")
-
-    result = tuple(_tags_starting_with(query, user))
-    exact_matches = tuple(res for res in result if res.name.lower() == query)
-    if exact_matches:
-        return exact_matches
-    else:
-        return result[:1]
-
-
-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))
-
-    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:
-        return render_to_response('catalogue/search_no_hits.html', {'tags':tag_list, 'prefix':prefix},
-            context_instance=RequestContext(request))
-
-
-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 = []
-    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)
-    dict_result = {"matches": tags_list}
-    return JSONResponse(dict_result, callback)
-
-# ====================
-# = 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))
-
-@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>To maintain your shelves you need to be logged in.</p>'))
-
-    if request.method == 'POST':
-        form = forms.ObjectSetsForm(book, request.user, request.POST)
-        if form.is_valid():
-            old_shelves = list(book.tags.filter(category='set'))
-            new_shelves = [models.Tag.objects.get(pk=id) for id in form.cleaned_data['set_ids']]
-
-            for shelf in [shelf for shelf in old_shelves if shelf not in new_shelves]:
-                shelf.book_count = None
-                shelf.save()
-
-            for shelf in [shelf for shelf in new_shelves if shelf not in old_shelves]:
-                shelf.book_count = None
-                shelf.save()
-
-            book.tags = new_shelves + list(book.tags.filter(~Q(category='set') | ~Q(user=request.user)))
-            if request.is_ajax():
-                return HttpResponse(_('<p>Shelves were sucessfully saved.</p>'))
-            else:
-                return HttpResponseRedirect('/')
-    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))
-
-
-@login_required
-@require_POST
-@cache.never_cache
-def remove_from_shelf(request, shelf, book):
-    book = get_object_or_404(models.Book, slug=book)
-    shelf = get_object_or_404(models.Tag, slug=shelf, category='set', user=request.user)
-
-    if shelf in book.tags:
-        models.Tag.objects.remove_tag(book, shelf)
-
-        shelf.book_count = None
-        shelf.save()
-
-        return HttpResponse(_('Book was successfully removed from the shelf'))
-    else:
-        return HttpResponse(_('This book is not on the shelf'))
-
-
-def collect_books(books):
-    """
-    Returns all real books in collection.
-    """
-    result = []
-    for book in books:
-        if len(book.children.all()) == 0:
-            result.append(book)
-        else:
-            result += collect_books(book.children.all())
-    return result
-
-
-@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.
-    """
-    shelf = get_object_or_404(models.Tag, slug=slug, category='set')
-
-    formats = []
-    form = forms.DownloadFormatsForm(request.GET)
-    if form.is_valid():
-        formats = form.cleaned_data['formats']
-    if len(formats) == 0:
-        formats = ['pdf', 'epub', 'odt', 'txt', 'mp3', 'ogg']
-
-    # Create a ZIP archive
-    temp = tempfile.TemporaryFile()
-    archive = zipfile.ZipFile(temp, 'w')
-
-    already = set()
-    for book in collect_books(models.Book.tagged.with_all(shelf)):
-        if 'pdf' in formats and book.pdf_file:
-            filename = book.pdf_file.path
-            archive.write(filename, str('%s.pdf' % book.slug))
-        if book.root_ancestor not in already and 'epub' in formats and book.root_ancestor.epub_file:
-            filename = book.root_ancestor.epub_file.path
-            archive.write(filename, str('%s.epub' % book.root_ancestor.slug))
-            already.add(book.root_ancestor)
-        if 'odt' in formats and book.odt_file:
-            filename = book.odt_file.path
-            archive.write(filename, str('%s.odt' % book.slug))
-        if 'txt' in formats and book.txt_file:
-            filename = book.txt_file.path
-            archive.write(filename, str('%s.txt' % book.slug))
-        if 'mp3' in formats and book.mp3_file:
-            filename = book.mp3_file.path
-            archive.write(filename, str('%s.mp3' % book.slug))
-        if 'ogg' in formats and book.ogg_file:
-            filename = book.ogg_file.path
-            archive.write(filename, str('%s.ogg' % 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
-
-
-@cache.never_cache
-def shelf_book_formats(request, shelf):
-    """"
-    Returns a list of formats of books in shelf.
-    """
-    shelf = get_object_or_404(models.Tag, slug=shelf, category='set')
-
-    formats = {'pdf': False, 'epub': False, 'odt': False, 'txt': False, 'mp3': False, 'ogg': False}
-
-    for book in collect_books(models.Book.tagged.with_all(shelf)):
-        if book.pdf_file:
-            formats['pdf'] = True
-        if book.root_ancestor.epub_file:
-            formats['epub'] = True
-        if book.odt_file:
-            formats['odt'] = True
-        if book.txt_file:
-            formats['txt'] = True
-        if book.mp3_file:
-            formats['mp3'] = True
-        if book.ogg_file:
-            formats['ogg'] = True
-
-    return HttpResponse(LazyEncoder().encode(formats))
-
-
-@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(_('<p>Shelf <strong>%s</strong> was successfully created</p>') % new_set)
-        else:
-            return HttpResponseRedirect('/')
-
-    return HttpResponseRedirect('/')
-
-
-@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(_('<p>Shelf <strong>%s</strong> was successfully removed</p>') % user_set.name)
-    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': {}}
-    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': {}}
-    else:
-        response_data = {'success': False, 'errors': registration_form.errors}
-    return HttpResponse(LazyEncoder(ensure_ascii=False).encode(response_data))
-
-
-@cache.never_cache
-def logout_then_redirect(request):
-    auth.logout(request)
-    return HttpResponseRedirect(urlquote_plus(request.GET.get('next', '/'), safe='/?='))
-
-
-
-# =========
-# = 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:
-            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:
-        return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
-
-
-
-def clock(request):
-    """ Provides server time for jquery.countdown,
-    in a format suitable for Date.parse()
-    """
-    from datetime import datetime
-    return HttpResponse(datetime.now().strftime('%Y/%m/%d %H:%M:%S'))