1 files changed, 92 insertions, 0 deletions
diff --git a/snaps/config/qos.py b/snaps/config/qos.py
new file mode 100644
index 0000000..e507d2d
--- /dev/null
+++ b/snaps/config/qos.py
@@ -0,0 +1,92 @@
+# Copyright (c) 2017 Cable Television Laboratories, Inc. ("CableLabs")
+#                    and others.  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 enum
+
+
+class Consumer(enum.Enum):
+    """
+    QoS Specification consumer types
+    """
+    front_end = 'front-end'
+    back_end = 'back-end'
+    both = 'both'
+
+
+class QoSConfig(object):
+    def __init__(self, **kwargs):
+        """
+        Constructor
+        :param name: the qos's name (required)
+        :param consumer: the qos's consumer type of the enum type Consumer
+                         (required)
+        :param specs: dict of key/values
+        """
+
+        self.name = kwargs.get('name')
+
+        if kwargs.get('consumer'):
+            self.consumer = map_consumer(kwargs['consumer'])
+        else:
+            self.consumer = None
+
+        self.specs = kwargs.get('specs')
+        if not self.specs:
+            self.specs = dict()
+
+        if not self.name or not self.consumer:
+            raise QoSConfigError(
+                "The attributes name and consumer are required")
+
+
+def map_consumer(consumer):
+    """
+    Takes a the protocol value maps it to the Consumer enum. When None return
+    None
+    :param consumer: the value to map to the Enum
+    :return: the Protocol enum object
+    :raise: Exception if value is invalid
+    """
+    if not consumer:
+        return None
+    elif isinstance(consumer, Consumer):
+        return consumer
+    elif isinstance(consumer, str):
+        proto_str = str(consumer)
+        if proto_str == 'front-end':
+            return Consumer.front_end
+        elif proto_str == 'back-end':
+            return Consumer.back_end
+        elif proto_str == 'both':
+            return Consumer.both
+        else:
+            raise QoSConfigError('Invalid Consumer - ' + proto_str)
+    else:
+        if consumer.value == 'front-end':
+            return Consumer.front_end
+        elif consumer.value == 'back-end':
+            return Consumer.back_end
+        elif consumer.value == 'both':
+            return Consumer.both
+        else:
+            raise QoSConfigError('Invalid Consumer - ' + consumer.value)
+
+
+class QoSConfigError(Exception):
+    """
+    Exception to be thrown when an qos settings are incorrect
+    """
+
+    def __init__(self, message):
+        Exception.__init__(self, message)