def get_date(self, week: Optional[CalendarWeek] = None) -> date:
if isinstance(week, CalendarWeek):
wanted_week = week
else:
year = getattr(self, "_year", None) or date.today().year
week_number = getattr(self, "_week", None) or CalendarWeek().week
wanted_week = CalendarWeek(year=year, week=week_number)
return wanted_week[self.weekday]
def get_next_relevant_day(cls,
day: Optional[date] = None,
time: Optional[time] = None,
prev: bool = False) -> date:
"""Return next (previous) day with lessons depending on date and time."""
if day is None:
day = timezone.now().date()
if time is not None and cls.time_max and not prev:
if time > cls.time_max:
day += timedelta(days=1)
cw = CalendarWeek.from_date(day)
if day.weekday() > cls.weekday_max:
if prev:
day = cw[cls.weekday_max]
else:
cw += 1
day = cw[cls.weekday_min]
elif day.weekday() < TimePeriod.weekday_min:
if prev:
cw -= 1
day = cw[cls.weekday_max]
else:
day = cw[cls.weekday_min]
return day
def get_substitution(self,
week: Optional[CalendarWeek] = None
) -> LessonSubstitution:
wanted_week = week or self.week or CalendarWeek()
# We iterate over all substitutions because this can make use of
# prefetching when this model is loaded from outside, in contrast
# to .filter()
for substitution in self.substitutions.all():
if substitution.week == wanted_week.week and substitution.year == wanted_week.year:
return substitution
return None
def get_substitution(
self,
week: Optional[CalendarWeek] = None
) -> Optional[SupervisionSubstitution]:
wanted_week = week or self.week or CalendarWeek()
# We iterate over all substitutions because this can make use of
# prefetching when this model is loaded from outside, in contrast
# to .filter()
for substitution in self.substitutions.all():
for weekday in range(0, 7):
if substitution.date == wanted_week[weekday]:
return substitution
return None
def get_relevant_week_from_datetime(cls,
when: Optional[datetime] = None
) -> CalendarWeek:
"""Return currently relevant week depending on current date and time."""
if not when:
when = timezone.now()
day = when.date()
time = when.time()
week = CalendarWeek.from_date(day)
if cls.weekday_max and day.weekday() > cls.weekday_max:
week += 1
elif cls.time_max and time > cls.time_max and day.weekday(
) == cls.weekday_max:
week += 1
return week
def date(self):
week = CalendarWeek(week=self.week, year=self.year)
return week[self.lesson_period.period.weekday]
def get_calendar_week(self, week: int):
year = self.get_year(week)
return CalendarWeek(year=year, week=week)