Use os_client config for Openstack requests

we need to use os_client config and direct api calls
because it is very stable.
Closes-Issue: PROD-20033

Change-Id: I3645f0426030bbbfa63b7bbc75a41f8d0df86dba
diff --git a/_modules/cinderv3/common.py b/_modules/cinderv3/common.py
new file mode 100644
index 0000000..93477a3
--- /dev/null
+++ b/_modules/cinderv3/common.py
@@ -0,0 +1,106 @@
+import six
+import logging
+import uuid
+
+import os_client_config
+from salt import exceptions
+
+
+log = logging.getLogger(__name__)
+
+SERVICE_KEY = 'volumev3'
+
+
+def get_raw_client(cloud_name):
+    config = os_client_config.OpenStackConfig()
+    cloud = config.get_one_cloud(cloud_name)
+    adapter = cloud.get_session_client(SERVICE_KEY)
+    adapter.version = '3'
+    try:
+        access_info = adapter.session.auth.get_access(adapter.session)
+        endpoints = access_info.service_catalog.get_endpoints()
+    except (AttributeError, ValueError) as exc:
+        six.raise_from(exc, exceptions.SaltInvocationError(
+            "Cannot load keystoneauth plugin. Please check your environment "
+            "configuration."))
+    if SERVICE_KEY not in endpoints:
+        raise exceptions.SaltInvocationError("Cannot find cinder endpoint in "
+                                             "environment endpoint list.")
+    return adapter
+
+
+def send(method):
+    def wrap(func):
+        @six.wraps(func)
+        def wrapped_f(*args, **kwargs):
+            cloud_name = kwargs.pop('cloud_name', None)
+            if not cloud_name:
+                raise exceptions.SaltInvocationError(
+                    "No cloud_name specified. Please provide cloud_name "
+                    "parameter")
+            adapter = get_raw_client(cloud_name)
+            kwarg_keys = list(kwargs.keys())
+            for k in kwarg_keys:
+                if k.startswith('__'):
+                    kwargs.pop(k)
+            url, request_kwargs = func(*args, **kwargs)
+            try:
+                response = getattr(adapter, method.lower())(url,
+                                                            **request_kwargs)
+            except Exception as e:
+                log.exception("Error occured when executing request")
+                return {"result": False,
+                        "comment": str(e),
+                        "status_code": getattr(e, "http_status", 500)}
+            return {"result": True,
+                    "body": response.json() if response.content else {},
+                    "status_code": response.status_code}
+        return wrapped_f
+    return wrap
+
+
+def _check_uuid(val):
+    try:
+        return str(uuid.UUID(val)) == val
+    except (TypeError, ValueError, AttributeError):
+        return False
+
+
+def get_by_name_or_uuid(resource_list, resp_key):
+    def wrap(func):
+        @six.wraps(func)
+        def wrapped_f(*args, **kwargs):
+            if 'name' in kwargs:
+                ref = kwargs.pop('name', None)
+                start_arg = 0
+            else:
+                start_arg = 1
+                ref = args[0]
+            item_id = None
+            if _check_uuid(ref):
+                item_id = ref
+            else:
+                cloud_name = kwargs['cloud_name']
+                # seems no filtering on volume type name in cinder
+                resp = resource_list(cloud_name=cloud_name)["body"][resp_key]
+                # so need to search in list directly
+                for item in resp:
+                    if item["name"] == ref:
+                        if item_id is not None:
+                            msg = ("Multiple resource: {resource} " 
+                                   "with name: {name} found ").format(
+                                    resource=resp_key, name=ref)
+                            return {"result": False,
+                                    "body": msg,
+                                    "status_code": 400}
+                        item_id = item["id"]
+                if not item_id:
+                    msg = ("Uniq {resource} resource "
+                           "with name={name} not found.").format(
+                            resource=resp_key, name=ref)
+                    return {"result": False,
+                            "body": msg,
+                            "status_code": 404}
+            return func(item_id, *args[start_arg:], **kwargs)
+        return wrapped_f
+    return wrap