Push policy adapter code (adapted from ECOMP)

Issue-ID: OPTFRA-17
Change-Id: I4497f894e139491a6746ab5b88e2d207f0d40be9
Signed-off-by: Sastry Isukapalli <sastry@research.att.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/adapters/policy/utils.py b/adapters/policy/utils.py
new file mode 100644
index 0000000..a006f12
--- /dev/null
+++ b/adapters/policy/utils.py
@@ -0,0 +1,58 @@
+# -------------------------------------------------------------------------
+#   Copyright (c) 2015-2017 AT&T Intellectual Property
+#
+#   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.
+#
+# -------------------------------------------------------------------------
+#
+
+from collections import defaultdict
+
+
+def group_policies(flat_policies):
+    """Filter policies using the following steps:
+    1. Apply prioritization among the policies that are sharing the same policy type and resource type
+    2. Remove redundant policies that may applicable across different types of resource
+    3. Filter policies based on type and return
+    :param flat_policies: list of flat policies
+    :return: Filtered policies
+    """
+    aggregated_policies = {}
+    filter_policies = defaultdict(list)
+    policy_name = []
+    for policy in flat_policies:
+        policy_type = policy['content']['type']
+        if policy_type not in aggregated_policies:
+            aggregated_policies[policy_type] = defaultdict(list)
+        for resource in policy['content']['policyScope']['resourceInstanceType']:
+            aggregated_policies[policy_type][resource].append(policy)
+    for policy_type in aggregated_policies:
+        for resource in aggregated_policies[policy_type]:
+            if len(aggregated_policies[policy_type][resource]) > 0:
+                aggregated_policies[policy_type][resource].sort(key=lambda x: x['priority'], reverse=True)
+                policy = aggregated_policies[policy_type][resource][0]
+                if policy['policyName'] not in policy_name:
+                    filter_policies[policy['content']['type']].append(policy)
+                    policy_name.append(policy['policyName'])
+    return filter_policies
+
+
+def _regex_policy_name(policy_name):
+    """Get the correct policy name as a regex
+    (e.g. OOF_HAS_vCPE.cloudAttributePolicy ends up in policy as OOF_HAS_vCPE.Config_MS_cloudAttributePolicy.1.xml
+    So, for now, we query it as OOF_HAS_vCPE..*aicAttributePolicy.*)
+    :param policy_name: Example: OOF_HAS_vCPE.aicAttributePolicy
+    :return: regexp for policy: Example: OOF_HAS_vCPE..*aicAttributePolicy.*
+    """
+    p = policy_name.partition('.')
+    return p[0] + p[1] + ".*" + p[2] + ".*"