1 files changed, 100 insertions, 0 deletions
diff --git a/nova/api/openstack/views/limits.py b/nova/api/openstack/views/limits.py
new file mode 100644
index 000000000..552db39ee
--- /dev/null
+++ b/nova/api/openstack/views/limits.py
@@ -0,0 +1,100 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2010-2011 OpenStack LLC.
+# All Rights Reserved.
+#
+#    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 time
+
+from nova.api.openstack import common
+
+
+class ViewBuilder(object):
+    """Openstack API base limits view builder."""
+
+    def build(self, rate_limits, absolute_limits):
+        rate_limits = self._build_rate_limits(rate_limits)
+        absolute_limits = self._build_absolute_limits(absolute_limits)
+
+        output = {
+            "limits": {
+                "rate": rate_limits,
+                "absolute": absolute_limits,
+            },
+        }
+
+        return output
+
+
+class ViewBuilderV10(ViewBuilder):
+    """Openstack API v1.0 limits view builder."""
+
+    def _build_rate_limits(self, rate_limits):
+        return [self._build_rate_limit(r) for r in rate_limits]
+
+    def _build_rate_limit(self, rate_limit):
+        return {
+            "verb": rate_limit["verb"],
+            "URI": rate_limit["URI"],
+            "regex": rate_limit["regex"],
+            "value": rate_limit["value"],
+            "remaining": int(rate_limit["remaining"]),
+            "unit": rate_limit["unit"],
+            "resetTime": rate_limit["resetTime"],
+        }
+
+    def _build_absolute_limits(self, absolute_limit):
+        return {}
+
+
+class ViewBuilderV11(ViewBuilder):
+    """Openstack API v1.1 limits view builder."""
+
+    def _build_rate_limits(self, rate_limits):
+        limits = []
+        for rate_limit in rate_limits:
+            _rate_limit_key = None
+            _rate_limit = self._build_rate_limit(rate_limit)
+
+            # check for existing key
+            for limit in limits:
+                if limit["uri"] == rate_limit["URI"] and \
+                   limit["regex"] == limit["regex"]:
+                    _rate_limit_key = limit
+                    break
+
+            # ensure we have a key if we didn't find one
+            if not _rate_limit_key:
+                _rate_limit_key = {
+                    "uri": rate_limit["URI"],
+                    "regex": rate_limit["regex"],
+                    "limit": [],
+                }
+                limits.append(_rate_limit_key)
+
+            _rate_limit_key["limit"].append(_rate_limit)
+
+        return limits
+
+    def _build_rate_limit(self, rate_limit):
+        return {
+            "verb": rate_limit["verb"],
+            "value": rate_limit["value"],
+            "remaining": int(rate_limit["remaining"]),
+            "unit": rate_limit["unit"],
+            "next-available": rate_limit["resetTime"],
+        }
+
+    def _build_absolute_limits(self, absolute_limit):
+        return {}