SDK Refactor: Prepare address scope commands

Prepare the OSC "address scope" commands for the SDK refactor.
See [1] for details.

[1] https://etherpad.openstack.org/p/osc-network-command-sdk-support

Change-Id: I4e253e01f9b0b10452354f4e4152468090c76958
Partially-Implements: blueprint network-command-sdk-support

1 files changed, 40 insertions, 0 deletions

diff --git a/openstackclient/network/sdk_utils.py b/openstackclient/network/sdk_utils.py
new file mode 100644
index 00000000..7bd54e46
--- /dev/null
+++ b/openstackclient/network/sdk_utils.py
@@ -0,0 +1,40 @@
+#   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 six
+
+
+# Get the OSC show command display and attribute columns for an SDK resource.
+def get_osc_show_columns_for_sdk_resource(sdk_resource, osc_column_map):
+    if getattr(sdk_resource, 'allow_get', None) is not None:
+        resource_dict = sdk_resource.to_dict(
+            body=True, headers=False, ignore_none=False)
+    else:
+        resource_dict = sdk_resource
+
+    # Build the OSC column names to display for the SDK resource.
+    attr_map = {}
+    display_columns = list(resource_dict.keys())
+    for sdk_attr, osc_attr in six.iteritems(osc_column_map):
+        if sdk_attr in display_columns:
+            attr_map[osc_attr] = sdk_attr
+            display_columns.remove(sdk_attr)
+        if osc_attr not in display_columns:
+            display_columns.append(osc_attr)
+    sorted_display_columns = sorted(display_columns)
+
+    # Build the SDK attribute names for the OSC column names.
+    attr_columns = []
+    for column in sorted_display_columns:
+        new_column = attr_map[column] if column in attr_map else column
+        attr_columns.append(new_column)
+    return tuple(sorted_display_columns), tuple(attr_columns)