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calebasse / calebasse / agenda / managers.py @ 98b28661

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from datetime import datetime, timedelta, date, time
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from interval import IntervalSet
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from django.db.models import Q
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from model_utils.managers import InheritanceManager, PassThroughManager, InheritanceQuerySet
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from calebasse.agenda.conf import default
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from calebasse.utils import weeks_since_epoch, weekday_ranks
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from calebasse import agenda
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__all__ = (
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    'EventManager',
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)
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class EventQuerySet(InheritanceQuerySet):
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    def for_today(self, today=None):
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        today = today or date.today()
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        excluded = self.filter(exceptions__exception_date=today).values_list('id', flat=True)
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        weeks = weeks_since_epoch(today)
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        filters = [Q(start_datetime__gte=datetime.combine(today, time()),
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               start_datetime__lte=datetime.combine(today, time(23,59,59)),
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               recurrence_periodicity__isnull=True,
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               canceled=False) ]
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        base_q = Q(start_datetime__lte=datetime.combine(today, time(23,59,59)),
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                canceled=False,
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                recurrence_week_day=today.weekday(),
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                recurrence_periodicity__isnull=False) & \
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                (Q(recurrence_end_date__gte=today) |
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                    Q(recurrence_end_date__isnull=True)) & \
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                ~ Q(id__in=excluded)
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        # week periods
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        for period in range(1, 6):
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            filters.append(base_q & Q(recurrence_week_offset=weeks % period,
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                recurrence_week_period=period))
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        # week parity
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        parity = today.isocalendar()[1] % 2
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        filters.append(base_q & Q(recurrence_week_parity=parity))
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        # week ranks
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        filters.append(base_q & Q(recurrence_week_rank__in=weekday_ranks(today)))
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        qs = self.filter(reduce(Q.__or__, filters))
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        qs = qs.distinct()
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        return qs
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    def today_occurrences(self, today=None):
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        today = today or date.today()
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        self = self.for_today(today)
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        occurences = ( e.today_occurrence(today) for e in self )
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        return sorted(occurences, key=lambda e: e.start_datetime)
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    def daily_disponibilities(self, date, events, participant, time_tables,
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            holidays):
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        '''Slice the day into quarters between 8:00 and 19:00, and returns the
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           list of particpants with their status amon free, busy and away for each
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           hour and quarters.
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           date - the date of day we slice
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           occurences - a dictionnary of iterable of events indexed by participants
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           participants - an iterable of participants
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           time_tables - a dictionnaty of timetable applying for this day indexed by participants
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           holidays - a dictionnary of holidays applying for this day indexed by participants
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        '''
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        result = dict()
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        quarter = 0
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        events_intervals = IntervalSet((o.to_interval() for o in events if not o.is_event_absence()))
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        timetables_intervals = IntervalSet((t.to_interval(date) for t in time_tables))
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        holidays_intervals = IntervalSet((h.to_interval(date) for h in holidays))
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        start_datetime = datetime(date.year, date.month, date.day, 8, 0)
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        end_datetime = datetime(date.year, date.month, date.day, 8, 15)
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        while (start_datetime.hour <= 19):
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            if not result.has_key(start_datetime.hour):
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                result[start_datetime.hour] = [[], [], [], []]
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                quarter = 0
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            interval = IntervalSet.between(start_datetime, end_datetime, False)
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            mins = quarter * 15
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            crossed_events = self.overlap_occurences(start_datetime, events)
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            if len(crossed_events) > 1:
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                result[start_datetime.hour][quarter].append((mins, {'id': participant.id, 'dispo': 'overlap'}))
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            elif interval.intersection(events_intervals):
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                result[start_datetime.hour][quarter].append((mins, {'id': participant.id, 'dispo': 'busy'}))
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            elif interval.intersection(holidays_intervals):
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                result[start_datetime.hour][quarter].append((mins, {'id': participant.id, 'dispo': 'busy'}))
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            elif not interval.intersection(timetables_intervals):
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                result[start_datetime.hour][quarter].append((mins, {'id': participant.id, 'dispo': 'away'}))
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            else:
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                result[start_datetime.hour][quarter].append((mins, {'id': participant.id, 'dispo': 'free'}))
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            quarter += 1
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            start_datetime += timedelta(minutes=15)
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            end_datetime += timedelta(minutes=15)
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        return result
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    def overlap_occurences(self, date_time=None, events=None):
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        """
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        returns the list of overlapping event occurences which do not begin and end
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        at the same time and have the same act type
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        """
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        date_time = date_time or datetime.now()
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        if events is None:
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            events = self.today_occurrences(date_time.date())
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        overlap = filter(lambda e: e.start_datetime <= date_time and e.end_datetime > date_time, events)
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        same_type_events = []
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        different_overlap = []
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        for event in overlap:
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            if different_overlap:
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                for e in different_overlap:
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                    try:
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                        if event.start_datetime == e.start_datetime and \
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                           event.end_datetime == e.end_datetime and \
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                           event.act_type == e.act_type:
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                            continue
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                        different_overlap.append(event)
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                    except AttributeError:
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                        continue
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            else:
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                different_overlap.append(event)
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        return different_overlap
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class EventManager(PassThroughManager.for_queryset_class(EventQuerySet),
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        InheritanceManager):
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    """ This class allows you to manage events, appointment, ...
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    """
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    def create_event(self, creator, title, event_type, participants=[], description='',
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            services=[], start_datetime=None, end_datetime=None, ressource=None, note=None, periodicity=1, until=False, **kwargs):
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        """
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        Convenience function to create an ``Event``, optionally create an
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        ``EventType``.
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        Args:
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            event_type: can be either an ``EventType`` object or the label
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            is either created or retrieved.
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            participants: List of CalebasseUser
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            start_datetime: will default to the current hour if ``None``
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            end_datetime: will default to ``start_datetime`` plus
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            default.DEFAULT_EVENT_DURATION hour if ``None``
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        Returns:
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            Event object
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        """
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        if isinstance(event_type, str):
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            event_type, created = agenda.models.EventType.objects.get_or_create(
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                label=event_type
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            )
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        if not start_datetime:
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            now = datetime.now()
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            start_datetime = datetime.combine(now.date, time(now.hour))
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        if not end_datetime:
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            end_datetime = start_datetime + default.DEFAULT_EVENT_DURATION
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        if until is False:
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            until = start_datetime.date()
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        event = self.create(creator=creator,
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                title=title, start_datetime=start_datetime,
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                end_datetime=end_datetime, event_type=event_type,
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                ressource=ressource, recurrence_periodicity=periodicity,
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                recurrence_end_date=until, **kwargs)
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        event.services = services
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        event.participants = participants
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        return event
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    def next_appointment(self, patient_record):
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        qs = self.next_appointments(patient_record)
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        if qs:
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            return qs[0]
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        else:
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            return None
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    def next_appointments(self, patient_record, today=None):
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        from calebasse.actes.models import Act
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        acts = Act.objects.next_acts(patient_record, today=today) \
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                .filter(parent_event__isnull=False) \
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                .select_related()
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        return [ a.parent_event.today_occurrence(a.date) for a in acts ]
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    def last_appointment(self, patient_record):
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        qs = self.last_appointments(patient_record)
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        if qs:
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            return qs[0]
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        else:
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            return None
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    def last_appointments(self, patient_record, today=None):
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        from calebasse.actes.models import Act
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        acts = Act.objects.last_acts(patient_record, today=today) \
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                .filter(parent_event__isnull=False) \
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                .select_related()
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        return [ a.parent_event.today_occurrence(a.date) for a in acts ]
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