def ensure_next_after_previous(state, kind, organisation, title, periodicity, minimum_from_today, acceptable_weekdays=range(7), number=1, time=None, locations=[]):
events = Event.objects.filter(organisation=organisation, date__gte=date.today())
# there are already events ready, don't do anything
if events.exists():
print "events already exists, don't do anything"
return
minimum_from_today_absolute = date.today() + timedelta(**minimum_from_today)
previous_event_date = Event.objects.order_by('-date')
periodicity = timedelta(**periodicity)
if previous_event_date.exists():
previous_event_date = previous_event_date.first().date
candidate_date = previous_event_date + periodicity
else:
previous_event_date = None
candidate_date = date.today() + timedelta(**minimum_from_today)
while candidate_date < minimum_from_today_absolute:
candidate_date += periodicity
number_this_year = Event.objects.filter(organisation=organisation, kind=kind, date__year=date.today().year).count() + 1
for i in range(number):
while candidate_date.weekday() not in acceptable_weekdays:
candidate_date += timedelta(days=1)
event = Event()
event.state = state
event.organisation = organisation
event.kind = kind
event.date = candidate_date
event.title = Template(title).render(Context({
"event": event,
"number_this_year": number_this_year,
}))
print "Creating a new event '%s' for %s on %s state %s" % (event.title, organisation, candidate_date.strftime("%F"), state)
if time:
event.time = datetime.time(**time)
event.save()
candidate_date += timedelta(days=1)
