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# -*- coding: utf-8 -*-
#
from django.db.models.signals import post_save, m2m_changed
from django.dispatch import receiver
from common.utils import get_logger
from .models import Asset, SystemUser, Node
from .tasks import update_assets_hardware_info_util, \
test_asset_connectability_util, push_system_user_to_node, \
push_node_system_users_to_asset
logger = get_logger(__file__)
def update_asset_hardware_info_on_created(asset):
logger.debug("Update asset `{}` hardware info".format(asset))
update_assets_hardware_info_util.delay([asset])
def test_asset_conn_on_created(asset):
logger.debug("Test asset `{}` connectability".format(asset))
test_asset_connectability_util.delay([asset])
def set_asset_root_node(asset):
logger.debug("Set asset default node: {}".format(Node.root()))
asset.nodes.add(Node.root())
@receiver(post_save, sender=Asset, dispatch_uid="my_unique_identifier")
def on_asset_created_or_update(sender, instance=None, created=False, **kwargs):
set_asset_root_node(instance)
if created:
logger.info("Asset `{}` create signal received".format(instance))
update_asset_hardware_info_on_created(instance)
test_asset_conn_on_created(instance)
@receiver(post_save, sender=SystemUser, dispatch_uid="my_unique_identifier")
def on_system_user_update(sender, instance=None, created=True, **kwargs):
if instance and not created:
for node in instance.nodes.all():
push_system_user_to_node(instance, node)
@receiver(m2m_changed, sender=SystemUser.nodes.through)
def on_system_user_node_change(sender, instance=None, **kwargs):
if instance and kwargs["action"] == "post_add":
for pk in kwargs['pk_set']:
node = kwargs['model'].objects.get(pk=pk)
push_system_user_to_node(instance, node)
@receiver(m2m_changed, sender=Asset.nodes.through)
def on_asset_node_changed(sender, instance=None, **kwargs):
if isinstance(instance, Asset) and kwargs['action'] == 'post_add':
logger.debug("Asset node change signal received")
for pk in kwargs['pk_set']:
node = kwargs['model'].objects.get(pk=pk)
push_node_system_users_to_asset(node, [instance])
@receiver(m2m_changed, sender=Asset.nodes.through)
def on_node_assets_changed(sender, instance=None, **kwargs):
if isinstance(instance, Node) and kwargs['action'] == 'post_add':
logger.debug("Node assets change signal received")
assets = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
push_node_system_users_to_asset(instance, assets)