70ab711216
* refactor: separate signal receiver from work * test: split test to match code structure * test: fix test * refactor: reorg signals in community app
45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
# Copyright The IETF Trust 2024, All Rights Reserved
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from django.conf import settings
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from django.db import transaction
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from django.db.models.signals import post_save
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from django.dispatch import receiver
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from ietf.doc.models import DocEvent
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from .tasks import notify_event_to_subscribers_task
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def notify_of_event(event: DocEvent):
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"""Send subscriber notification emails for a 'draft'-related DocEvent
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If the event is attached to a draft of type 'doc', queues a task to send notification emails to
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community list subscribers. No emails will be sent when SERVER_MODE is 'test'.
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"""
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if event.doc.type_id != "draft":
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return
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if getattr(event, "skip_community_list_notification", False):
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return
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# kludge alert: queuing a celery task in response to a signal can cause unexpected attempts to
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# start a Celery task during tests. To prevent this, don't queue a celery task if we're running
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# tests.
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if settings.SERVER_MODE != "test":
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# Wrap in on_commit in case a transaction is open
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transaction.on_commit(
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lambda: notify_event_to_subscribers_task.delay(event_id=event.pk)
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)
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# dispatch_uid ensures only a single signal receiver binding is made
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@receiver(post_save, dispatch_uid="notify_of_events_receiver_uid")
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def notify_of_events_receiver(sender, instance, **kwargs):
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"""Call notify_of_event after saving a new DocEvent"""
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if not isinstance(instance, DocEvent):
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return
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if not kwargs.get("created", False):
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return # only notify on creation
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notify_of_event(instance)
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