forked from CGM_Public/pretix_original
83 lines
3.3 KiB
Python
83 lines
3.3 KiB
Python
#
|
|
# This file is part of pretix (Community Edition).
|
|
#
|
|
# Copyright (C) 2014-2020 Raphael Michel and contributors
|
|
# Copyright (C) 2020-2021 rami.io GmbH and contributors
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
|
|
# Public License as published by the Free Software Foundation in version 3 of the License.
|
|
#
|
|
# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
|
|
# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
|
|
# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
|
|
# this file, see <https://pretix.eu/about/en/license>.
|
|
#
|
|
# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
|
|
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
|
|
# details.
|
|
#
|
|
# You should have received a copy of the GNU Affero General Public License along with this program. If not, see
|
|
# <https://www.gnu.org/licenses/>.
|
|
#
|
|
from calendar import timegm
|
|
|
|
from django.db.models import Max
|
|
from django.http import HttpResponse
|
|
from django.utils.http import http_date, parse_http_date_safe
|
|
from rest_framework.filters import OrderingFilter
|
|
|
|
|
|
class RichOrderingFilter(OrderingFilter):
|
|
|
|
def filter_queryset(self, request, queryset, view):
|
|
ordering = self.get_ordering(request, queryset, view)
|
|
|
|
if ordering:
|
|
if hasattr(view, 'ordering_custom'):
|
|
newo = []
|
|
for ordering_part in ordering:
|
|
ob = view.ordering_custom.get(ordering_part)
|
|
if ob:
|
|
ob = dict(ob)
|
|
newo.append(ob.pop('_order'))
|
|
queryset = queryset.annotate(**ob)
|
|
else:
|
|
newo.append(ordering_part)
|
|
ordering = newo
|
|
return queryset.order_by(*ordering)
|
|
|
|
return queryset
|
|
|
|
|
|
class ConditionalListView:
|
|
|
|
def list(self, request, **kwargs):
|
|
if_modified_since = request.headers.get('If-Modified-Since')
|
|
if if_modified_since:
|
|
if_modified_since = parse_http_date_safe(if_modified_since)
|
|
if_unmodified_since = request.headers.get('If-Unmodified-Since')
|
|
if if_unmodified_since:
|
|
if_unmodified_since = parse_http_date_safe(if_unmodified_since)
|
|
if not hasattr(request, 'event'):
|
|
return super().list(request, **kwargs)
|
|
|
|
lmd = request.event.logentry_set.filter(
|
|
content_type__model=self.get_queryset().model._meta.model_name,
|
|
content_type__app_label=self.get_queryset().model._meta.app_label,
|
|
).aggregate(
|
|
m=Max('datetime')
|
|
)['m']
|
|
if lmd:
|
|
lmd_ts = timegm(lmd.utctimetuple())
|
|
|
|
if if_unmodified_since and lmd and lmd_ts > if_unmodified_since:
|
|
return HttpResponse(status=412)
|
|
|
|
if if_modified_since and lmd and lmd_ts <= if_modified_since:
|
|
return HttpResponse(status=304)
|
|
|
|
resp = super().list(request, **kwargs)
|
|
if lmd:
|
|
resp['Last-Modified'] = http_date(lmd_ts)
|
|
return resp
|