Add basic sale statistics (closes #57)

src/pretix/control/views/orders.py

@@ -1,15 +1,16 @@
 from itertools import groupby
 from django.contrib import messages
 from django.core.urlresolvers import reverse
+from django.db.models import Count
 from django.utils.timezone import now
 from django.utils.translation import ugettext_lazy as _
 from django.http import HttpResponse
 from django.shortcuts import redirect, render
 from django.utils.functional import cached_property
-from django.views.generic import ListView, DetailView
+from django.views.generic import ListView, DetailView, TemplateView
 from pretix.base.forms import VersionedModelForm
 
-from pretix.base.models import Order, Quota
+from pretix.base.models import Order, Quota, OrderPosition
 from pretix.base.signals import register_payment_providers
 from pretix.control.permissions import EventPermissionRequiredMixin
 
@@ -203,3 +204,89 @@ class OrderExtend(OrderView):
     def form(self):
         return ExtendForm(instance=self.order,
                           data=self.request.POST if self.request.method == "POST" else None)
+
+
+class OverView(EventPermissionRequiredMixin, TemplateView):
+    template_name = 'pretixcontrol/orders/overview.html'
+    permission = 'can_view_orders'
+
+    def get_context_data(self, **kwargs):
+        ctx = super().get_context_data()
+        items = self.request.event.items.all().select_related(
+            'category',  # for re-grouping
+        ).prefetch_related(
+            'properties',  # for .get_all_available_variations()
+        ).order_by('category__position', 'category_id', 'name')
+
+        num_total = {
+            (p['item'], p['variation']): p['cnt']
+            for p in OrderPosition.objects.current.filter(
+                order__event=self.request.event
+            ).values('item', 'variation').annotate(cnt=Count('id'))
+        }
+        num_cancelled = {
+            (p['item'], p['variation']): p['cnt']
+            for p in OrderPosition.objects.current.filter(
+                order__event=self.request.event, order__status=Order.STATUS_CANCELLED
+            ).values('item', 'variation').annotate(cnt=Count('id'))
+        }
+        num_refunded = {
+            (p['item'], p['variation']): p['cnt']
+            for p in OrderPosition.objects.current.filter(
+                order__event=self.request.event, order__status=Order.STATUS_REFUNDED
+            ).values('item', 'variation').annotate(cnt=Count('id'))
+        }
+        num_pending = {
+            (p['item'], p['variation']): p['cnt']
+            for p in OrderPosition.objects.current.filter(
+                order__event=self.request.event, order__status__in=(Order.STATUS_PENDING, Order.STATUS_EXPIRED)
+            ).values('item', 'variation').annotate(cnt=Count('id'))
+        }
+        num_paid = {
+            (p['item'], p['variation']): p['cnt']
+            for p in OrderPosition.objects.current.filter(
+                order__event=self.request.event, order__status=Order.STATUS_PAID
+            ).values('item', 'variation').annotate(cnt=Count('id'))
+        }
+
+        for item in items:
+            item.all_variations = sorted(item.get_all_variations(),
+                                         key=lambda vd: vd.ordered_values())
+            for var in item.all_variations:
+                variid = var['variation'].identity if 'variation' in var else None
+                var.num_total = num_total.get((item.identity, variid), 0)
+                var.num_pending = num_pending.get((item.identity, variid), 0)
+                var.num_cancelled = num_cancelled.get((item.identity, variid), 0)
+                var.num_refunded = num_refunded.get((item.identity, variid), 0)
+                var.num_paid = num_paid.get((item.identity, variid), 0)
+            item.has_variations = (len(item.all_variations) != 1
+                                   or not item.all_variations[0].empty())
+            item.num_total = sum(var.num_total for var in item.all_variations)
+            item.num_pending = sum(var.num_pending for var in item.all_variations)
+            item.num_cancelled = sum(var.num_cancelled for var in item.all_variations)
+            item.num_refunded = sum(var.num_refunded for var in item.all_variations)
+            item.num_paid = sum(var.num_paid for var in item.all_variations)
+
+        # Regroup those by category
+        ctx['items_by_category'] = sorted([
+            # a group is a tuple of a category and a list of items
+            (cat, [i for i in items if i.category == cat])
+            for cat in set([i.category for i in items])  # insert categories into a set for uniqueness
+            # a set is unsorted, so sort again by category
+        ], key=lambda group: (group[0].position, group[0].identity) if group[0] is not None else (0, ""))
+        for c in ctx['items_by_category']:
+            c[0].num_total = sum(item.num_total for item in c[1])
+            c[0].num_pending = sum(item.num_pending for item in c[1])
+            c[0].num_cancelled = sum(item.num_cancelled for item in c[1])
+            c[0].num_refunded = sum(item.num_refunded for item in c[1])
+            c[0].num_paid = sum(item.num_paid for item in c[1])
+
+        ctx['total'] = {
+            'num_total': sum(c.num_total for c, i in ctx['items_by_category']),
+            'num_pending': sum(c.num_pending for c, i in ctx['items_by_category']),
+            'num_cancelled': sum(c.num_cancelled for c, i in ctx['items_by_category']),
+            'num_refunded': sum(c.num_refunded for c, i in ctx['items_by_category']),
+            'num_paid': sum(c.num_total for c, i in ctx['items_by_category'])
+        }
+
+        return ctx