Added basic statistics

src/pretix/plugins/statistics/views.py

@@ -0,0 +1,44 @@
+import json
+from django.db.models import Count
+from django.views.generic import TemplateView
+import dateutil.parser
+import dateutil.rrule
+from pretix.base.models import Order
+
+from pretix.control.permissions import EventPermissionRequiredMixin
+
+
+class IndexView(EventPermissionRequiredMixin, TemplateView):
+    template_name = 'pretixplugins/statistics/index.html'
+    permission = 'can_view_orders'
+
+    def get_context_data(self, **kwargs):
+        ctx = super().get_context_data(**kwargs)
+
+        ordered_by_day = {
+            dateutil.parser.parse(o['datetime']).date(): o['count']
+            for o in
+            Order.objects.current.filter(event=self.request.event).extra({'datetime': "date(datetime)"}).values(
+                'datetime').annotate(count=Count('id'))
+        }
+        paid_by_day = {
+            o['payment_date'].date(): o['count']
+            for o in
+            Order.objects.current.filter(event=self.request.event, payment_date__isnull=False).values(
+                'payment_date').annotate(count=Count('id'))
+        }
+        data = []
+        for d in dateutil.rrule.rrule(
+                dateutil.rrule.DAILY,
+                dtstart=min(ordered_by_day.keys()),
+                until=max(max(ordered_by_day.keys()), max(paid_by_day.keys()))):
+            d = d.date()
+            data.append({
+                'date': d.strftime('%Y-%m-%d'),
+                'ordered': ordered_by_day.get(d, 0),
+                'paid': paid_by_day.get(d, 0)
+            })
+
+        ctx['obd_data'] = json.dumps(data)
+
+        return ctx