Payments via Stripe (#30)

src/pretix/plugins/stripe/signals.py

@@ -1,10 +1,26 @@
+from django.core.urlresolvers import resolve
 from django.dispatch import receiver
+from django.template import Context
+from django.template.loader import get_template
 
 from pretix.base.signals import register_payment_providers
 
 from .payment import Stripe
+from pretix.presale.signals import html_head
 
 
 @receiver(register_payment_providers)
 def register_payment_provider(sender, **kwargs):
     return Stripe
+
+
+@receiver(html_head)
+def html_head_presale(sender, request=None, **kwargs):
+    provider = Stripe(sender)
+    url = resolve(request.path_info)
+    if provider.is_enabled and "checkout.payment" in url.url_name:
+        template = get_template('pretixplugins/stripe/presale_head.html')
+        ctx = Context({'event': sender, 'settings': provider.settings})
+        return template.render(ctx)
+    else:
+        return ""