Add role inference calls, domains

Also rework get_by_name_or_uuid method to work with multiple keys
and add get_by_name_or_uuid decorator for role assign, unassgin and check.

Change-Id: I808ce0c1aa1a7231875256ae6f22e986d78f8f00
Related-Issue: PROD-21388
diff --git a/_modules/keystonev3/arg_converter.py b/_modules/keystonev3/arg_converter.py
new file mode 100644
index 0000000..2ef40aa
--- /dev/null
+++ b/_modules/keystonev3/arg_converter.py
@@ -0,0 +1,73 @@
+import uuid
+from keystonev3 import common
+from keystonev3 import lists
+
+
+class CheckId(object):
+    def check_id(self, val):
+        try:
+            return str(uuid.UUID(val)).replace('-', '') == val
+        except (TypeError, ValueError, AttributeError):
+            return False
+
+
+class DomainCheckId(CheckId):
+    def check_id(self, val):
+        if val == 'default':
+            return True
+        return super(DomainCheckId, self).check_id(val)
+
+
+resource_lists = {
+    'project': lists.project_list,
+    'role': lists.role_list,
+    'service': lists.service_list,
+    'user': lists.user_list,
+    'domain': lists.domain_list,
+    'group': lists.group_list,
+}
+
+
+response_keys = {
+    'project': 'projects',
+    'role': 'roles',
+    'service': 'services',
+    'user': 'users',
+    'domain': 'domains',
+    'group': 'groups'
+}
+
+
+def get_by_name_or_uuid_multiple(resource_arg_name_pairs):
+    def wrap(func):
+        def wrapped_f(*args, **kwargs):
+            results = []
+            args_start = 0
+            for index, (resource, arg_name) in enumerate(
+                    resource_arg_name_pairs):
+                if arg_name in kwargs:
+                    ref = kwargs.pop(arg_name, None)
+                else:
+                    ref = args[index]
+                    args_start += 1
+                cloud_name = kwargs['cloud_name']
+                if resource == 'domain':
+                    checker = DomainCheckId()
+                else:
+                    checker = CheckId()
+                if checker.check_id(ref):
+                    results.append(ref)
+                else:
+                    # Then we have name not uuid
+                    resp_key = response_keys[resource]
+                    resp = resource_lists[resource](
+                        name=ref, cloud_name=cloud_name)[resp_key]
+                    if len(resp) == 0:
+                        raise common.ResourceNotFound(resp_key, ref)
+                    elif len(resp) > 1:
+                        raise common.MultipleResourcesFound(resp_key, ref)
+                    results.append(resp[0]['id'])
+                results.extend(args[args_start:])
+            return func(*results, **kwargs)
+        return wrapped_f
+    return wrap
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