Add legacy redirect for newsletters

website/newsletters/urls.py

@@ -7,4 +7,6 @@ app_name = "newsletters"
 urlpatterns = [
     url('^(?P<pk>\d+)/$', views.preview, name='preview'),
     url(r'admin/send/(?P<pk>\d+)/$', views.admin_send, name='admin-send'),
+    url('^(?P<year>\d+)/(?P<week>\d+)/nieuwsbrief.html',
+        views.legacy_redirect, name='legacy-redirect')
 ]

website/newsletters/views.py

@@ -7,6 +7,8 @@ from django.template import Context
 from django.template.loader import get_template
 from django.utils import translation
 
+from datetime import datetime, timedelta, date
+
 from members.models import Member
 from newsletters.models import Newsletter
 from partners.models import Partner
@@ -24,6 +26,17 @@ def preview(request, pk):
     })
 
 
+def legacy_redirect(request, year, week):
+    newsletter_date = datetime.strptime(
+        '%s-%s-1' % (year, week), '%Y-%W-%w')
+    if date(int(year), 1, 4).isoweekday() > 4:
+        newsletter_date -= timedelta(days=7)
+
+    newsletter = get_object_or_404(Newsletter, date=newsletter_date)
+
+    return redirect(newsletter.get_absolute_url(), permanent=True)
+
+
 @staff_member_required
 @permission_required('newsletters.change_event')
 def admin_send(request, pk):

website/thaliawebsite/urls.py

@@ -57,6 +57,7 @@ urlpatterns = [
     url(r'^pizzas/', include('pizzas.urls')),
     url(r'^index\.php/events/ical/feed\.ics', DeprecationFeed()),
     url(r'^newsletters/', include('newsletters.urls')),
+    url(r'^nieuwsbrief/', include('newsletters.urls')),  # for legacy reasons
     url(r'^association$', TemplateView.as_view(
         template_name='singlepages/association.html'), name='association'),
     url(r'^', include([  # 'association' menu