1 files changed, 108 insertions, 0 deletions
diff --git a/apps/slice_selection/optimizers/conductor/response_processor.py b/apps/slice_selection/optimizers/conductor/response_processor.py
new file mode 100644
index 0000000..2357ab9
--- /dev/null
+++ b/apps/slice_selection/optimizers/conductor/response_processor.py
@@ -0,0 +1,108 @@
+# -------------------------------------------------------------------------
+#   Copyright (C) 2020 Wipro Limited.
+#
+#   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.
+#
+# -------------------------------------------------------------------------
+#
+
+"""
+Module for processing response from conductor for slice selection
+"""
+
+import re
+
+
+class ResponseProcessor(object):
+    def __init__(self, request_info, slice_config):
+        self.request_info = request_info
+        self.slice_config = slice_config
+
+    def process_response(self, recommendations, model_info, subnets, model_type):
+        """Process conductor response to form the response for the API request
+
+            :param recommendations: recommendations from conductor
+            :param model_info: model info from the request
+            :param subnets: list of subnets
+            :param model_type: NSI or NSSI
+            :return: response json as a dictionary
+        """
+        if not recommendations:
+            return self.get_slice_selection_response([])
+        model_name = model_info['name']
+        solutions = [self.get_solution_from_candidate(rec[model_name]['candidate'], model_info, subnets, model_type)
+                     for rec in recommendations]
+        return self.get_slice_selection_response(solutions)
+
+    def get_solution_from_candidate(self, candidate, model_info, subnets, model_type):
+        if candidate['inventory_type'] == 'slice_profiles':
+            return {
+                'existingNSI': False,
+                'newNSISolution': {
+                    'sliceProfiles': self.get_slice_profiles_from_candidate(candidate, subnets)
+                }
+            }
+        elif model_type == 'NSSI':
+            return {
+                'UUID': model_info['UUID'],
+                'invariantUUID': model_info['invariantUUID'],
+                'NSSIName': candidate['instance_name'],
+                'NSSIId': candidate['instance_id']
+            }
+
+        elif model_type == 'NSI':
+            return {
+                'existingNSI': True,
+                'sharedNSISolution': {
+                    'UUID': model_info['UUID'],
+                    'invariantUUID': model_info['invariantUUID'],
+                    'NSIName': candidate['instance_name'],
+                    'NSIId': candidate['instance_id']
+                }
+            }
+
+    def get_slice_profiles_from_candidate(self, candidate, subnets):
+        slice_profiles = []
+        for subnet in subnets:
+            slice_profile = {self.get_profile_attribute(k, subnet): v for k, v in candidate.items()
+                             if k.startswith(subnet)}
+            slice_profile['domainType'] = subnet
+            slice_profiles.append(slice_profile)
+        return slice_profiles
+
+    def get_profile_attribute(self, attribute, subnet):
+        snake_to_camel = self.slice_config['attribute_mapping']['snake_to_camel']
+        return snake_to_camel[re.sub(f'^{subnet}_', '', attribute)]
+
+    def process_error_response(self, error_message):
+        """Form response message from the error message
+
+            :param error_message: error message while processing the request
+            :return: response json as dictionary
+        """
+        return {'requestId': self.request_info['requestId'],
+                'transactionId': self.request_info['transactionId'],
+                'requestStatus': 'error',
+                'statusMessage': error_message}
+
+    def get_slice_selection_response(self, solutions):
+        """Get NSI selection response from final solution
+
+            :param solutions: final solutions
+            :return: NSI selection response to send back as dictionary
+        """
+        return {'requestId': self.request_info['requestId'],
+                'transactionId': self.request_info['transactionId'],
+                'requestStatus': 'completed',
+                'statusMessage': '',
+                'solutions': solutions}