Add support for reserved seating (#1228)

* Initial work on seating * Add seat guids * Add product_list_top * CartAdd: Ignore item when a seat is passed * Cart display * product_list_top → render_seating_plan * Render seating plan in voucher redemption * Fix failing tests * Add tests for extending cart positions with seats * Add subevent_forms to docs * Update schema, migrations * Dealing with expired orders * steps to order change * Change order positions * Allow to add seats * tests for ocm * Fix things after rebase * Seating plans API * Add more tests for cart behaviour * Widget support * Adjust widget tests * Re-enable CSP * Update schema * Api: position.seat * Add guid to word list * API: (sub)event.seating_plan * Vali fixes * Fix api * Fix reference in test * Fix test for real
2019-06-25 11:00:03 +02:00
parent f79d17cb6a
commit 93089d87e3
77 changed files with 3689 additions and 164 deletions
--- a/src/pretix/base/services/seating.py
+++ b/src/pretix/base/services/seating.py
@@ -0,0 +1,57 @@
+from django.db.models import Count
+from django.utils.translation import ugettext_lazy as _
+
+from pretix.base.models import CartPosition, Seat
+
+
+class SeatProtected(Exception):
+    pass
+
+
+def validate_plan_change(event, subevent, plan):
+    current_taken_seats = set(
+        event.seats.select_related('product')
+             .annotate(has_op=Count('orderposition'))
+             .filter(subevent=subevent, has_op=True)
+             .values_list('seat_guid', flat=True)
+    )
+    new_seats = {
+        ss.guid for ss in plan.iter_all_seats()
+    } if plan else set()
+    leftovers = list(current_taken_seats - new_seats)
+    if leftovers:
+        raise SeatProtected(_('You can not change the plan since seat "{}" is not present in the new plan and is '
+                              'already sold.').format(leftovers[0]))
+
+
+def generate_seats(event, subevent, plan, mapping):
+    current_seats = {
+        s.seat_guid: s for s in
+        event.seats.select_related('product').annotate(has_op=Count('orderposition')).filter(subevent=subevent)
+    }
+    create_seats = []
+    if plan:
+        for ss in plan.iter_all_seats():
+            p = mapping.get(ss.category)
+            if ss.guid in current_seats:
+                seat = current_seats.pop(ss.guid)
+                if seat.product != p:
+                    seat.product = p
+                    seat.save()
+            else:
+                create_seats.append(Seat(
+                    event=event,
+                    subevent=subevent,
+                    seat_guid=ss.guid,
+                    name=ss.name,
+                    product=p,
+                ))
+
+    for s in current_seats.values():
+        if s.has_op:
+            raise SeatProtected(_('You can not change the plan since seat "{}" is not present in the new plan and is '
+                                  'already sold.').format(s.name))
+
+    Seat.objects.bulk_create(create_seats)
+    CartPosition.objects.filter(seat__in=[s.pk for s in current_seats.values()]).delete()
+    Seat.objects.filter(pk__in=[s.pk for s in current_seats.values()]).delete()