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authentik/passbook/outposts/signals.py

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2020-09-02 22:04:12 +00:00
"""passbook outpost signals"""
from asgiref.sync import async_to_sync
from channels.layers import get_channel_layer
from django.db.models import Model
from django.db.models.signals import post_save
from django.dispatch import receiver
from structlog import get_logger
from passbook.outposts.models import Outpost, OutpostModel
LOGGER = get_logger()
@receiver(post_save, sender=Outpost)
# pylint: disable=unused-argument
def ensure_user_and_token(sender, instance, **_):
"""Ensure that token is created/updated on save"""
_ = instance.token
@receiver(post_save)
# pylint: disable=unused-argument
def post_save_update(sender, instance, **_):
"""If an OutpostModel, or a model that is somehow connected to an OutpostModel is saved,
we send a message down the relevant OutpostModels WS connection to trigger an update"""
if isinstance(instance, OutpostModel):
LOGGER.debug("triggering outpost update from outpostmodel", instance=instance)
_send_update(instance)
return
for field in instance._meta.get_fields():
# Each field is checked if it has a `related_model` attribute (when ForeginKeys or M2Ms)
# are used, and if it has a value
if not hasattr(field, "related_model"):
continue
if not field.related_model:
continue
if not issubclass(field.related_model, OutpostModel):
continue
field_name = f"{field.name}_set"
if not hasattr(instance, field_name):
continue
LOGGER.debug("triggering outpost update from from field", field=field.name)
# Because the Outpost Model has an M2M to Provider,
# we have to iterate over the entire QS
for reverse in getattr(instance, field_name).all():
_send_update(reverse)
def _send_update(outpost_model: Model):
"""Send update trigger for each channel of an outpost model"""
for outpost in outpost_model.outpost_set.all():
channel_layer = get_channel_layer()
for channel in outpost.channels:
LOGGER.debug("sending update", channel=channel)
2020-09-02 22:04:12 +00:00
async_to_sync(channel_layer.send)(channel, {"type": "event.update"})