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# -*- coding: utf-8 -*-
#
from collections import defaultdict
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_assets
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):
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:
logger.info("System user `{}` update signal received".format(instance))
assets = instance.assets.all()
push_system_user_to_assets.delay(instance, assets)
@receiver(m2m_changed, sender=SystemUser.nodes.through)
def on_system_user_nodes_change(sender, instance=None, **kwargs):
if instance and kwargs["action"] == "post_add":
assets = set()
nodes = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
for node in nodes:
assets.update(set(node.get_all_assets()))
instance.assets.add(*tuple(assets))
@receiver(m2m_changed, sender=SystemUser.assets.through)
def on_system_user_assets_change(sender, instance=None, **kwargs):
if instance and kwargs["action"] == "post_add":
assets = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
push_system_user_to_assets(instance, assets)
@receiver(m2m_changed, sender=Asset.nodes.through)
def on_asset_node_changed(sender, instance=None, **kwargs):
if isinstance(instance, Asset):
if kwargs['action'] == 'post_add':
logger.debug("Asset node change signal received")
nodes = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
system_users_assets = defaultdict(set)
system_users = SystemUser.objects.filter(nodes__in=nodes)
# 清理节点缓存
for system_user in system_users:
system_users_assets[system_user].update({instance})
for system_user, assets in system_users_assets.items():
system_user.assets.add(*tuple(assets))
@receiver(m2m_changed, sender=Asset.nodes.through)
def on_node_assets_changed(sender, instance=None, **kwargs):
if isinstance(instance, Node):
assets = kwargs['model'].objects.filter(pk__in=kwargs['pk_set'])
if kwargs['action'] == 'post_add':
logger.debug("Node assets change signal received")
# 重新关联系统用户和资产的关系
system_users = SystemUser.objects.filter(nodes=instance)
for system_user in system_users:
system_user.assets.add(*tuple(assets))
@receiver(post_save, sender=Node)
def on_node_update_or_created(sender, instance=None, created=False, **kwargs):
if instance and not created:
instance.expire_full_value()