def calculate_effective_schedule_start_dt(schedule):
"""
Calculation of the first start date to improve performance
"""
programme_start_dt = schedule.programme.start_dt
programme_end_dt = schedule.programme.end_dt
# If there are no rrules
if not schedule.has_recurrences():
if programme_start_dt and programme_start_dt > schedule.start_dt:
return None
if programme_end_dt and schedule.start_dt > programme_end_dt:
return None
return schedule.start_dt
# Get first date
after_dt = schedule.start_dt
if programme_start_dt:
after_dt = max(schedule.start_dt, programme_start_dt)
first_start_dt = fix_recurrence_dst(recurrence_after(
schedule.recurrences, transform_dt_to_default_tz(after_dt), transform_dt_to_default_tz(schedule.start_dt)))
if first_start_dt:
if programme_end_dt and programme_end_dt < first_start_dt:
return None
return first_start_dt
return None
def calculate_effective_schedule_start_dt(schedule):
"""
Calculation of the first start date to improve performance
"""
programme_start_dt = schedule.programme.start_dt
programme_end_dt = schedule.programme.end_dt
# If there are no rrules
if not schedule.has_recurrences():
if programme_start_dt and programme_start_dt > schedule.start_dt:
return None
if programme_end_dt and schedule.start_dt > programme_end_dt:
return None
return schedule.start_dt
# Get first date
after_dt = schedule.start_dt
if programme_start_dt:
after_dt = max(schedule.start_dt, programme_start_dt)
first_start_dt = fix_recurrence_dst(recurrence_after(
schedule.recurrences, transform_dt_to_default_tz(after_dt), transform_dt_to_default_tz(schedule.start_dt)))
if first_start_dt:
if programme_end_dt and programme_end_dt < first_start_dt:
return None
return first_start_dt
return None
def date_after(self, after):
after_date = self._merge_after(after)
if not after_date:
return
after_date = transform_dt_to_default_tz(after_date)
start_dt = transform_dt_to_default_tz(self.start_dt)
date = recurrence_after(self.recurrences, after_date, start_dt)
return fix_recurrence_dst(date)
def date_after(self, after):
after_date = self._merge_after(after)
if not after_date:
return
after_date = transform_dt_to_default_tz(after_date)
start_dt = transform_dt_to_default_tz(self.start_dt)
date = recurrence_after(self.recurrences, after_date, start_dt)
return fix_recurrence_dst(date)
def test_impossible_recurrence_after(self):
"""
Testing error calling after and function wrapper to solve it (recurrence_after)
"""
start_dt = datetime.datetime(2014, 1, 20, 14, 0, 0)
until_dt = datetime.datetime(2014, 1, 19, 14, 0, 0)
daily_recurrence = recurrence.Recurrence(
rrules=[recurrence.Rule(recurrence.DAILY, until=until_dt)])
dt = daily_recurrence.after(start_dt, True, dtstart=start_dt)
self.assertEqual(start_dt, dt) # wrong!
self.assertIsNone(recurrence_after(daily_recurrence, start_dt, start_dt))
def test_impossible_recurrence_after(self):
"""
Testing error calling after and function wrapper to solve it (recurrence_after)
"""
start_dt = datetime.datetime(2014, 1, 20, 14, 0, 0)
until_dt = datetime.datetime(2014, 1, 19, 14, 0, 0)
daily_recurrence = recurrence.Recurrence(
rrules=[recurrence.Rule(recurrence.DAILY, until=until_dt)])
dt = daily_recurrence.after(start_dt, True, dtstart=start_dt)
self.assertEqual(start_dt, dt) # wrong!
self.assertIsNone(
recurrence_after(daily_recurrence, start_dt, start_dt))