Fix #782 -- Select2 widget for check-in lists

src/pretix/control/views/typeahead.py

@@ -115,6 +115,49 @@ def subevent_select2(request, **kwargs):
     return JsonResponse(doc)
 
 
+@event_permission_required(None)
+def checkinlist_select2(request, **kwargs):
+    query = request.GET.get('query', '')
+    try:
+        page = int(request.GET.get('page', '1'))
+    except ValueError:
+        page = 1
+
+    qf = Q(name__icontains=i18ncomp(query))
+
+    try:
+        dt = parse(query)
+    except ValueError:
+        pass
+    else:
+        tz = request.event.timezone
+        if dt and request.event.has_subevents:
+            dt_start = make_aware(datetime.combine(dt.date(), time(hour=0, minute=0, second=0)), tz)
+            dt_end = make_aware(datetime.combine(dt.date(), time(hour=23, minute=59, second=59)), tz)
+            qf |= Q(subevent__date_from__gte=dt_start) & Q(subevent__date_from__lte=dt_end)
+
+    qs = request.event.checkin_lists.filter(
+        qf
+    ).order_by('name')
+
+    total = qs.count()
+    pagesize = 20
+    offset = (page - 1) * pagesize
+    doc = {
+        'results': [
+            {
+                'id': e.pk,
+                'text': str(e.name),
+            }
+            for e in qs[offset:offset + pagesize]
+        ],
+        'pagination': {
+            "more": total >= (offset + pagesize)
+        }
+    }
+    return JsonResponse(doc)
+
+
 def organizer_select2(request):
     term = request.GET.get('query', '')
     try: