CSV list of booking occurrences for a set of rooms

reservation_list_csv.py

from io import BytesIO
import csv
import sys

from pytz import timezone

from indico.modules.rb.models.reservations import RepeatMapping

tz = timezone('Europe/Zurich')
room_ids = {96, 336, 97, 98}
out = BytesIO()

occurrences = ReservationOccurrence.find(
    Reservation.room_id.in_(room_ids),
    ReservationOccurrence.start_dt >= tz.localize(datetime(2016, 1, 1)),
    ReservationOccurrence.end_dt < tz.localize(datetime(2018, 1, 1)),
    ReservationOccurrence.is_valid,
    _join=ReservationOccurrence.reservation,
    _eager=ReservationOccurrence.reservation
).options(ReservationOccurrence.NO_RESERVATION_USER_STRATEGY).order_by(ReservationOccurrence.start_dt).all()

writer = csv.writer(out)
writer.writerow(['Room', 'Reason', 'Booked for', 'Frequency', 'Date', 'Start time', 'End time', 'URL'])

for occur in occurrences:
    reservation = occur.reservation
    data = [reservation.room.full_name.encode('utf-8'), reservation.booking_reason.encode('utf-8'),
            reservation.booked_for_name.encode('utf-8'),
            RepeatMapping.get_short_name(reservation.repeat_frequency, reservation.repeat_interval),
            occur.start_dt.date(), occur.start_dt.time(), occur.end_dt.time(), reservation.details_url]
    writer.writerow(data)

out.seek(0)