def get_unsanctioned_users_blackout_times(self, start, end):
universe = (start, end)
all_blackout_ranges = [[(start, end)]]
# for all un-sanctioned observers
one_day = timedelta(days=1)
for o in self.investigator_set \
.exclude(user__sanctioned=True) \
.exclude(observer=False):
# Get reservation times
reservation_sets = \
Reservation.objects.filter(user=o) \
.exclude(start_date__gte=end) \
.exclude(end_date__lte=start)
# add a day to end_date (check-out day) because we
# assume they are available all that day just like
# they are available all day on check-in day
onsite_ranges = [(rs.start_date, rs.end_date + one_day)
for rs in reservation_sets]
# Get black-out ranges
blackout_ranges = []
for b in o.user.blackout_set.all():
blackout_ranges.extend(b.generateDates(start, end))
# Get available ranges
available_ranges = AnalogSet.diffs(onsite_ranges, blackout_ranges)
# Get this observer's blackout times
all_blackout_ranges.append(
AnalogSet.diffs([universe], available_ranges))
return AnalogSet.intersects(all_blackout_ranges)
