Added functions to translate between uuid and uri

This change is a subset of patch 294559 to help the reviews and
decouple code.
Added _is_uuid_valid to check is a uuid is valid.
Added get_uri_from_uuid to translate a given resource UUID to a
resource URI.

Change-Id: Ida83b476e722f0e3c6f987cd5b893f8a8127c3b4

oneview_client/tests/unit/test_utils.py

@@ -0,0 +1,49 @@
+# -*- encoding: utf-8 -*-
+#
+# (c) Copyright 2016 Hewlett Packard Enterprise Development LP
+# Copyright 2016 Universidade Federal de Campina Grande
+#
+#    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 unittest
+
+from oneview_client import utils
+
+
+class UtilsTestCase(unittest.TestCase):
+    def test__is_uuid_valid_with_valid_uuid(self):
+        uuid = 'abcdef12-3456-789f-edcb-aabcdef12345'
+        self.assertTrue(utils._is_uuid_valid(uuid))
+
+    def test__is_uuid_valid_with_invalid_uuid(self):
+        uuid = 'abcdef12-3456-789f-edcb-aabcdef12345?'
+        self.assertFalse(utils._is_uuid_valid(uuid))
+
+    def test_get_uuid_from_uri(self):
+        expected_uuid = 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa'
+        uri = '/rest/resource/' + expected_uuid
+        self.assertEqual(expected_uuid, utils.get_uuid_from_uri(uri))
+
+    def test_get_uuid_from_uri_as_none(self):
+        self.assertEqual(None, utils.get_uuid_from_uri(None))
+
+    def test_get_uri_from_uuid_with_valid_uuid(self):
+        prefix = '/rest/resource/'
+        uuid = 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa'
+        expected_uri = prefix + uuid
+        self.assertEqual(expected_uri, utils.get_uri_from_uuid(prefix, uuid))
+
+    def test_get_uri_from_uuid_with_invalid_uuid(self):
+        prefix = '/rest/resource/'
+        uuid = 'aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa?'
+        self.assertEqual(None, utils.get_uri_from_uuid(prefix, uuid))

oneview_client/utils.py

@@ -13,7 +13,23 @@
 #    See the License for the specific language governing permissions and
 #    limitations under the License.
 
+import re
+
+UUID_PATTERN = "^[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-" +\
+    "[0-9a-fA-F]{4}-[0-9a-fA-F]{12}$"
+
+
+def _is_uuid_valid(uuid):
+    if re.match(UUID_PATTERN, uuid):
+        return True
+    return False
+
 
 def get_uuid_from_uri(uri):
     if uri:
         return uri.split("/")[-1]
+
+
+def get_uri_from_uuid(resource_prefix, uuid):
+    if uuid and _is_uuid_valid(uuid):
+        return str(resource_prefix) + str(uuid)