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# Copyright (C) 2018 Verizon. All Rights Reserved
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import ast
import json
import logging
import traceback
from drf_yasg.utils import swagger_auto_schema
from lcm.nf.biz.create_subscription import CreateSubscription
from lcm.nf.biz.query_subscription import QuerySubscription
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView
from lcm.nf.serializers.lccn_subscription_request import LccnSubscriptionRequestSerializer
from lcm.nf.serializers.lccn_subscription import LccnSubscriptionSerializer
from lcm.nf.serializers.lccn_subscriptions import LccnSubscriptionsSerializer
from lcm.nf.serializers.response import ProblemDetailsSerializer
from lcm.pub.exceptions import NFLCMException
logger = logging.getLogger(__name__)
VALID_FILTERS = ["operationTypes", "operationStates", "notificationTypes", "vnfInstanceId"]
def get_problem_details_serializer(status_code, error_message):
problem_details = {
"status": status_code,
"detail": error_message
}
problem_details_serializer = ProblemDetailsSerializer(data=problem_details)
problem_details_serializer.is_valid()
return problem_details_serializer
class SubscriptionsView(APIView):
@swagger_auto_schema(
request_body=LccnSubscriptionRequestSerializer(),
responses={
status.HTTP_201_CREATED: LccnSubscriptionSerializer(),
status.HTTP_303_SEE_OTHER: ProblemDetailsSerializer(),
status.HTTP_500_INTERNAL_SERVER_ERROR: ProblemDetailsSerializer()
}
)
def post(self, request):
logger.debug("SubscribeNotification--post::> %s" % request.data)
try:
lccn_subscription_request_serializer = LccnSubscriptionRequestSerializer(data=request.data)
if not lccn_subscription_request_serializer.is_valid():
raise NFLCMException(lccn_subscription_request_serializer.errors)
subscription = CreateSubscription(
lccn_subscription_request_serializer.data).do_biz()
lccn_notifications_filter = {
"notificationTypes": ast.literal_eval(subscription.notification_types),
"operationTypes": ast.literal_eval(subscription.operation_types),
"operationStates": ast.literal_eval(subscription.operation_states),
"vnfInstanceSubscriptionFilter": json.loads(subscription.vnf_instance_filter)
}
subscription_data = {
"id": subscription.subscription_id,
"callbackUri": subscription.callback_uri,
"_links": json.loads(subscription.links),
"filter": lccn_notifications_filter
}
sub_resp_serializer = LccnSubscriptionSerializer(data=subscription_data)
if not sub_resp_serializer.is_valid():
raise NFLCMException(sub_resp_serializer.errors)
return Response(data=sub_resp_serializer.data, status=status.HTTP_201_CREATED)
except NFLCMException as e:
logger.error(e.message)
if "exists" in e.message:
return Response(data={'error': '%s' % e.message}, status=status.HTTP_303_SEE_OTHER)
return Response(data={'error': '%s' % e.message}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
except Exception as e:
logger.error(e.message)
logger.error(traceback.format_exc())
return Response(data={'error': e.message}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
@swagger_auto_schema(
responses={
status.HTTP_200_OK: LccnSubscriptionsSerializer(),
status.HTTP_400_BAD_REQUEST: ProblemDetailsSerializer(),
status.HTTP_500_INTERNAL_SERVER_ERROR: ProblemDetailsSerializer()
}
)
def get(self, request):
logger.debug("SubscribeNotification--get::> %s" % request.query_params)
try:
if request.query_params and not set(request.query_params).issubset(set(VALID_FILTERS)):
problem_details_serializer = get_problem_details_serializer(status.HTTP_400_BAD_REQUEST, "Not a valid filter")
return Response(data=problem_details_serializer.data, status=status.HTTP_400_BAD_REQUEST)
resp_data = QuerySubscription(request.query_params).query_multi_subscriptions()
subscriptions_serializer = LccnSubscriptionsSerializer(data=resp_data)
if not subscriptions_serializer.is_valid():
raise NFLCMException(subscriptions_serializer.errors)
logger.debug("SubscribeNotification--get::> Remove default fields if exclude_default" +
" is specified")
return Response(data=subscriptions_serializer.data, status=status.HTTP_200_OK)
except NFLCMException as e:
logger.error(e.message)
problem_details_serializer = get_problem_details_serializer(status.HTTP_500_INTERNAL_SERVER_ERROR, traceback.format_exc())
return Response(data=problem_details_serializer.data, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
except Exception as e:
logger.error(e.message)
logger.error(traceback.format_exc())
problem_details_serializer = get_problem_details_serializer(status.HTTP_500_INTERNAL_SERVER_ERROR, traceback.format_exc())
return Response(data=problem_details_serializer.data, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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