Reworked glance salt formulas

image_import and image_absent are added
image_download added to be used with
barbican's sign_image

Change-Id: I9d885aa9b139b440dcbc08263341bc7ff1f38f05
Related-Issue: PROD-19310
diff --git a/_modules/glancev2/common.py b/_modules/glancev2/common.py
new file mode 100644
index 0000000..1e686f1
--- /dev/null
+++ b/_modules/glancev2/common.py
@@ -0,0 +1,117 @@
+import logging
+import os_client_config
+from uuid import UUID
+
+log = logging.getLogger(__name__)
+
+
+class GlanceException(Exception):
+
+    _msg = "Glance module exception occured."
+
+    def __init__(self, message=None, **kwargs):
+        super(GlanceException, self).__init__(message or self._msg)
+
+
+class NoGlanceEndpoint(GlanceException):
+    _msg = "Glance endpoint not found in keystone catalog."
+
+
+class NoAuthPluginConfigured(GlanceException):
+    _msg = ("You are using keystoneauth auth plugin that does not support "
+            "fetching endpoint list from token (noauth or admin_token).")
+
+
+class NoCredentials(GlanceException):
+    _msg = "Please provide cloud name present in clouds.yaml."
+
+
+class ResourceNotFound(GlanceException):
+    _msg = "Uniq resource: {resource} with name: {name} not found."
+
+    def __init__(self, resource, name, **kwargs):
+        super(GlanceException, self).__init__(
+            self._msg.format(resource=resource, name=name))
+
+
+class MultipleResourcesFound(GlanceException):
+    _msg = "Multiple resource: {resource} with name: {name} found."
+
+    def __init__(self, resource, name, **kwargs):
+        super(GlanceException, self).__init__(
+            self._msg.format(resource=resource, name=name))
+
+
+def get_raw_client(cloud_name):
+    service_type = 'image'
+    adapter = os_client_config.make_rest_client(service_type,
+                                                cloud=cloud_name)
+    try:
+        access_info = adapter.session.auth.get_access(adapter.session)
+        endpoints = access_info.service_catalog.get_endpoints()
+    except (AttributeError, ValueError):
+        e = NoAuthPluginConfigured()
+        log.exception('%s' % e)
+        raise e
+    if service_type not in endpoints:
+        if not service_type:
+            e = NoGlanceEndpoint()
+            log.error('%s' % e)
+            raise e
+    return adapter
+
+
+def send(method):
+    def wrap(func):
+        def wrapped_f(*args, **kwargs):
+            cloud_name = kwargs.pop('cloud_name')
+            if not cloud_name:
+                e = NoCredentials()
+                log.error('%s' % e)
+                raise e
+            adapter = get_raw_client(cloud_name)
+            # Remove salt internal kwargs
+            kwarg_keys = list(kwargs.keys())
+            for k in kwarg_keys:
+                if k.startswith('__'):
+                    kwargs.pop(k)
+            url, request_kwargs = func(*args, **kwargs)
+            response = getattr(adapter, method)(url, **request_kwargs)
+            if not response.content:
+                return {}
+            return response.json()
+        return wrapped_f
+    return wrap
+
+
+def _check_uuid(val):
+    try:
+        return str(UUID(val)).replace('-', '') == val.replace('-', '')
+    except (TypeError, ValueError, AttributeError):
+        return False
+
+
+def get_by_name_or_uuid(resource_list, resp_key):
+    def wrap(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]
+            if _check_uuid(ref):
+                uuid = ref
+            else:
+                # Then we have name not uuid
+                cloud_name = kwargs['cloud_name']
+                resp = resource_list(
+                    name=ref, cloud_name=cloud_name)[resp_key]
+                if len(resp) == 0:
+                    raise ResourceNotFound(resp_key, ref)
+                elif len(resp) > 1:
+                    raise MultipleResourcesFound(resp_key, ref)
+                uuid = resp[0]['id']
+            return func(uuid, *args[start_arg:], **kwargs)
+        return wrapped_f
+    return wrap