bornhack-website/src/program/management/commands/notification_worker.py

import logging
from datetime import timedelta
from time import sleep

from django.conf import settings
from django.core.management.base import BaseCommand
from django.utils import timezone

from camps.utils import get_current_camp
from ircbot.models import OutgoingIrcMessage
from program.models import EventInstance

logger = logging.getLogger("bornhack.%s" % __name__)


class Command(BaseCommand):
    args = "none"
    help = "Queue notifications for channels and users for upcoming event instances."

    def output(self, message):
        self.stdout.write(
            "%s: %s" % (timezone.now().strftime("%Y-%m-%d %H:%M:%S"), message)
        )

    def handle(self, *args, **options):
        self.output("Schedule notification worker running...")
        while True:
            camp = get_current_camp()
            if camp:
                # a camp is currently going on, check if we need to send out any notifications
                for ei in EventInstance.objects.filter(
                    event__camp=camp,
                    event__event_type__notifications=True,
                    notifications_sent=False,
                    when__startswith__lt=timezone.now()
                    + timedelta(
                        minutes=settings.SCHEDULE_EVENT_NOTIFICATION_MINUTES
                    ),  # start of event is less than X minutes away
                    when__startswith__gt=timezone.now(),  # but event has not started yet
                ):
                    # this event is less than settings.SCHEDULE_EVENT_NOTIFICATION_MINUTES minutes from starting, queue an IRC notificatio
                    oim = OutgoingIrcMessage.objects.create(
                        target=settings.IRCBOT_SCHEDULE_ANNOUNCE_CHANNEL,
                        message="starting soon: %s" % ei,
                        timeout=ei.when.lower,
                    )
                    logger.info(
                        "added irc message id %s for eventinstance %s" % (oim.id, ei)
                    )
                    ei.notifications_sent = True
                    ei.save()

            # check once per minute
            sleep(60)