tasks.py

import logging

from django.utils import timezone
from notifications.models import EmailTemplate, EmailTemplateIdentifier
from grants.tasks import get_name
from pycon.celery import app

logger = logging.getLogger(__name__)


@app.task
def send_conference_voucher_email(conference_voucher_id: int) -> None:
    from conferences.models import ConferenceVoucher

    conference_voucher = ConferenceVoucher.objects.get(id=conference_voucher_id)
    if conference_voucher.voucher_email_sent_at is not None:
        logger.info(
            "Voucher email already sent for conference_voucher %s, skipping",
            conference_voucher_id,
        )
        return

    conference = conference_voucher.conference

    user = conference_voucher.user
    voucher_code = conference_voucher.voucher_code

    email_template = EmailTemplate.objects.for_conference(conference).get_by_identifier(
        EmailTemplateIdentifier.voucher_code
    )

    email_template.send_email(
        recipient=user,
        placeholders={
            "voucher_code": voucher_code,
            "voucher_type": conference_voucher.voucher_type,
            "user_name": get_name(user, "there"),
        },
    )

    conference_voucher.voucher_email_sent_at = timezone.now()
    conference_voucher.save(update_fields=["voucher_email_sent_at"])