Add notification system util in GVNFM

Change-Id: I1489722e30121aebb69b524cdaafaa44729784a2
Signed-off-by: Bharath Thiruveedula<bharath.thiruveedula@verizon.com>
Issue-ID: VFC-1096

1 files changed, 63 insertions, 0 deletions

diff --git a/lcm/lcm/pub/utils/notificationsutil.py b/lcm/lcm/pub/utils/notificationsutil.py
new file mode 100644
index 00000000..3af8f22a
--- /dev/null
+++ b/lcm/lcm/pub/utils/notificationsutil.py
@@ -0,0 +1,63 @@
+# 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 json
+import logging
+import requests
+
+from rest_framework import status
+from requests.auth import HTTPBasicAuth
+
+from lcm.nf import const
+from lcm.pub.database.models import SubscriptionModel
+
+logger = logging.getLogger(__name__)
+
+
+class NotificationsUtil(object):
+    def __init__(self):
+        pass
+
+    def send_notification(self, notification):
+        logger.info("Send Notifications to the callbackUri")
+        filters = {
+            "vnfInstanceId": "vnf_instance_filter",
+            "operationState": "operation_states",
+            "operation": "operation_types"
+        }
+        subscriptions_filter = {v + "__contains": notification[k] for k, v in filters.iteritems()}
+
+        subscriptions = SubscriptionModel.objects.filter(**subscriptions_filter)
+        if not subscriptions.exists():
+            logger.info("No subscriptions created for the filters %s" % notification)
+            return
+        logger.info("Start sending notifications")
+        for subscription in subscriptions:
+            # set subscription id
+            notification["subscriptionId"] = subscription.subscription_id
+            callbackUri = subscription.callback_uri
+            auth_info = json.loads(subscription.auth_info)
+            if auth_info["authType"] == const.OAUTH2_CLIENT_CREDENTIALS:
+                pass
+            self.post_notification(callbackUri, auth_info, notification)
+
+    def post_notification(self, callbackUri, auth_info, notification):
+        params = auth_info.get("paramsBasic", {})
+        username = params.get("userName")
+        password = params.get("password")
+        logger.info("Sending notification to %s", callbackUri)
+        resp = requests.post(callbackUri, data=notification, auth=HTTPBasicAuth(username, password))
+        if resp.status_code != status.HTTP_204_NO_CONTENT:
+            raise Exception("Unable to send the notification to %s, due to %s" % (callbackUri, resp.text))
+        return