symposion_app Files · vendor/symposion/schedule/timetable.py

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James Polley

Create regidesk app

Shows summary of all attendees with a paid ticket, including
boarding_pass status.

Currently, regidesk allows staff with the requisite permission the
ability to view the checkin status of attendees, and email the user
their boarding pass email.

Included is a view for the user to retrieve their own QR code (in case
they got the plain-text version of the email, they can use this to
download an image to their phone for faster checkin)

import itertools

from django.db.models import Count, Min

from symposion.schedule.models import Room, Slot, SlotRoom


class TimeTable(object):

    def __init__(self, day):
        self.day = day

    def slots_qs(self):
        qs = Slot.objects.all()
        qs = qs.filter(day=self.day)
        return qs

    def rooms(self):
        qs = Room.objects.all()
        qs = qs.filter(schedule=self.day.schedule)
        qs = qs.filter(
            pk__in=SlotRoom.objects.filter(slot__in=self.slots_qs().values("pk")).values("room"))
        qs = qs.order_by("order")
        return qs

    def __iter__(self):
        times = sorted(set(itertools.chain(*self.slots_qs().values_list("start", "end"))))
        slots = Slot.objects.filter(pk__in=self.slots_qs().values("pk"))
        slots = slots.annotate(room_count=Count("slotroom"), order=Min("slotroom__room__order"))
        slots = slots.order_by("order")
        row = []
        total_room_count = self.rooms().count()
        for time, next_time in pairwise(times):
            row = {"time": time, "slots": []}
            row_slots = [ slot for slot in slots if slot.start == time]
            for slot in row_slots:
                slot.rowspan = TimeTable.rowspan(times, slot.start, slot.end)
                slot.colspan = slot.room_count if not slot.exclusive else total_room_count
                row["slots"].append(slot)
            if row["slots"] or next_time is None:
                yield row

    @staticmethod
    def rowspan(times, start, end):
        return times.index(end) - times.index(start)


def pairwise(iterable):
    a, b = itertools.tee(iterable)
    next(b)
    return itertools.zip_longest(a, b)