Allow import bank data from CSV files

src/pretix/plugins/banktransfer/signals.py

@@ -1,10 +1,29 @@
+from django.core.urlresolvers import reverse, resolve
 from django.dispatch import receiver
+from django.utils.translation import ugettext_lazy as _
 
 from pretix.base.signals import register_payment_providers
 
 from .payment import BankTransfer
+from pretix.control.signals import nav_event
 
 
 @receiver(register_payment_providers)
 def register_payment_provider(sender, **kwargs):
     return BankTransfer
+
+
+@receiver(nav_event)
+def html_head_presale(sender, request=None, **kwargs):
+    url = resolve(request.path_info)
+    return [
+        {
+            'label': _('Import bank data'),
+            'url': reverse('plugins:banktransfer.import', kwargs={
+                'event': request.event.slug,
+                'organizer': request.event.organizer.slug,
+            }),
+            'active': (url.namespace == 'plugins' and url.url_name == 'banktransfer.import'),
+            'icon': 'upload',
+        }
+    ]