51 lines
1.6 KiB
Python
51 lines
1.6 KiB
Python
import itertools
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from django.db.models import Count, Min
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from symposion.schedule.models import Room, Slot, SlotRoom
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class TimeTable(object):
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def __init__(self, day):
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self.day = day
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def slots_qs(self):
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qs = Slot.objects.all()
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qs = qs.filter(day=self.day)
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return qs
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def rooms(self):
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qs = Room.objects.all()
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qs = qs.filter(schedule=self.day.schedule)
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qs = qs.filter(
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pk__in=SlotRoom.objects.filter(slot__in=self.slots_qs().values("pk")).values("room"))
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qs = qs.order_by("order")
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return qs
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def __iter__(self):
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times = sorted(set(itertools.chain(*self.slots_qs().values_list("start", "end"))))
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slots = Slot.objects.filter(pk__in=self.slots_qs().values("pk"))
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slots = slots.annotate(room_count=Count("slotroom"), order=Min("slotroom__room__order"))
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slots = slots.order_by("start", "order")
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row = []
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total_room_count = self.rooms().count()
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for time, next_time in pairwise(times):
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row = {"time": time, "slots": []}
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for slot in slots:
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if slot.start == time:
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slot.rowspan = TimeTable.rowspan(times, slot.start, slot.end)
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slot.colspan = slot.room_count if not slot.exclusive else total_room_count
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row["slots"].append(slot)
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if row["slots"] or next_time is None:
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yield row
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@staticmethod
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def rowspan(times, start, end):
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return times.index(end) - times.index(start)
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def pairwise(iterable):
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a, b = itertools.tee(iterable)
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b.next()
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return itertools.izip_longest(a, b)
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