# ~*~ coding: utf-8 ~*~ from collections import namedtuple, defaultdict from functools import partial from django.db.models.signals import m2m_changed from django.utils.translation import ugettext_lazy as _ from rest_framework import status from rest_framework.decorators import action from rest_framework.generics import get_object_or_404 from rest_framework.response import Response from rest_framework.serializers import ValidationError from assets.models import Asset from common.const.http import POST from common.const.signals import PRE_REMOVE, POST_REMOVE from common.exceptions import SomeoneIsDoingThis from common.mixins.api import SuggestionMixin from common.utils import get_logger from orgs.mixins import generics from orgs.mixins.api import OrgBulkModelViewSet from orgs.utils import current_org from .. import serializers from ..models import Node from ..tasks import ( update_node_assets_hardware_info_manual, test_node_assets_connectivity_manual, check_node_assets_amount_task ) logger = get_logger(__file__) __all__ = [ 'NodeViewSet', 'NodeAssetsApi', 'NodeAddAssetsApi', 'NodeRemoveAssetsApi', 'MoveAssetsToNodeApi', 'NodeAddChildrenApi', 'NodeTaskCreateApi', ] class NodeViewSet(SuggestionMixin, OrgBulkModelViewSet): model = Node filterset_fields = ('value', 'key', 'id') search_fields = ('full_value',) serializer_class = serializers.NodeSerializer rbac_perms = { 'match': 'assets.match_node', 'check_assets_amount_task': 'assets.change_node' } @action(methods=[POST], detail=False, url_path='check_assets_amount_task') def check_assets_amount_task(self, request): task = check_node_assets_amount_task.delay(current_org.id) return Response(data={'task': task.id}) def perform_update(self, serializer): node = self.get_object() if node.is_org_root() and node.value != serializer.validated_data['value']: msg = _("You can't update the root node name") raise ValidationError({"error": msg}) return super().perform_update(serializer) def destroy(self, request, *args, **kwargs): node = self.get_object() if node.is_org_root(): error = _("You can't delete the root node ({})".format(node.value)) return Response(data={'error': error}, status=status.HTTP_403_FORBIDDEN) if node.has_offspring_assets(): error = _("Deletion failed and the node contains assets") return Response(data={'error': error}, status=status.HTTP_403_FORBIDDEN) return super().destroy(request, *args, **kwargs) class NodeAssetsApi(generics.ListAPIView): serializer_class = serializers.AssetSerializer def get_queryset(self): node_id = self.kwargs.get('pk') query_all = self.request.query_params.get('all') instance = get_object_or_404(Node, pk=node_id) if query_all: return instance.get_all_assets() else: return instance.get_assets() class NodeAddChildrenApi(generics.UpdateAPIView): model = Node serializer_class = serializers.NodeAddChildrenSerializer instance = None def update(self, request, *args, **kwargs): """ 同时支持 put 和 patch 方法""" instance = self.get_object() node_ids = request.data.get("nodes") children = Node.objects.filter(id__in=node_ids) for node in children: node.parent = instance return Response("OK") class NodeAddAssetsApi(generics.UpdateAPIView): model = Node serializer_class = serializers.NodeAssetsSerializer instance = None def perform_update(self, serializer): assets = serializer.validated_data.get('assets') instance = self.get_object() instance.assets.add(*tuple(assets)) class NodeRemoveAssetsApi(generics.UpdateAPIView): model = Node serializer_class = serializers.NodeAssetsSerializer instance = None def perform_update(self, serializer): assets = serializer.validated_data.get('assets') node = self.get_object() node.assets.remove(*assets) # 把孤儿资产添加到 root 节点 orphan_assets = Asset.objects.filter( id__in=[a.id for a in assets], nodes__isnull=True ).distinct() Node.org_root().assets.add(*orphan_assets) class MoveAssetsToNodeApi(generics.UpdateAPIView): model = Node serializer_class = serializers.NodeAssetsSerializer instance = None def perform_update(self, serializer): assets = serializer.validated_data.get('assets') node = self.get_object() self.remove_old_nodes(assets) node.assets.add(*assets) def remove_old_nodes(self, assets): m2m_model = Asset.nodes.through # 查询资产与节点关系表，查出要移动资产与节点的所有关系 relates = m2m_model.objects.filter(asset__in=assets).values_list('asset_id', 'node_id') if relates: # 对关系以资产进行分组，用来发 `reverse=False` 信号 asset_nodes_mapper = defaultdict(set) for asset_id, node_id in relates: asset_nodes_mapper[asset_id].add(node_id) # 组建一个资产 id -> Asset 的 mapper asset_mapper = {asset.id: asset for asset in assets} # 创建删除关系信号发送函数 senders = [] for asset_id, node_id_set in asset_nodes_mapper.items(): senders.append(partial(m2m_changed.send, sender=m2m_model, instance=asset_mapper[asset_id], reverse=False, model=Node, pk_set=node_id_set)) # 发送 pre 信号 [sender(action=PRE_REMOVE) for sender in senders] num = len(relates) asset_ids, node_ids = zip(*relates) # 删除之前的关系 rows, _i = m2m_model.objects.filter(asset_id__in=asset_ids, node_id__in=node_ids).delete() if rows != num: raise SomeoneIsDoingThis # 发送 post 信号 [sender(action=POST_REMOVE) for sender in senders] class NodeTaskCreateApi(generics.CreateAPIView): perm_model = Asset model = Node serializer_class = serializers.NodeTaskSerializer def check_permissions(self, request): action = request.data.get('action') action_perm_require = { 'refresh': 'assets.refresh_assethardwareinfo', 'test': 'assets.test_assetconnectivity' } perm_required = action_perm_require.get(action) has = self.request.user.has_perm(perm_required) if not has: self.permission_denied(request) def get_object(self): node_id = self.kwargs.get('pk') node = get_object_or_404(self.model, id=node_id) return node @staticmethod def set_serializer_data(s, task): data = getattr(s, '_data', {}) data["task"] = task.id setattr(s, '_data', data) @staticmethod def refresh_nodes_cache(): Task = namedtuple('Task', ['id']) task = Task(id="0") return task def perform_create(self, serializer): action = serializer.validated_data["action"] node = self.get_object() if action == "refresh_cache" and node is None: task = self.refresh_nodes_cache() self.set_serializer_data(serializer, task) return if action == "refresh": task = update_node_assets_hardware_info_manual.delay(node) else: task = test_node_assets_connectivity_manual.delay(node) self.set_serializer_data(serializer, task)