Enable usages API

packet/Manager.py

@@ -93,6 +93,14 @@ def list_hardware_reservations(self, project_id, params={}):
             hardware_reservation = HardwareReservation(jsoned, self)
             hardware_reservations.append(hardware_reservation)
         return hardware_reservations
+
+    def list_project_usage(self, project_id, params={}):
+        data = self.call_api("projects/%s/usages" % project_id, params=params)
+        usages = list()
+        for jsoned in data["usages"]:
+            device = Usage(jsoned, self)
+            usages.append(device)
+        return usages   
 
     def get_hardware_reservation(self, hardware_reservation_id):
         data = self.call_api("hardware-reservations/%s" % hardware_reservation_id)

packet/Usage.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+# SPDX-License-Identifier: LGPL-3.0-only
+
+class Usage:
+    def __init__(self, data, manager):
+        self.manager = manager
+
+        self.facility = data.get("facility")
+        self.type = data.get("type")
+        self.name = data.get("name")
+        self.plan = data.get("plan")
+        self.plan_version = data.get("plan_version")
+        self.quantity = data.get("quantity")
+        self.unit = data.get("unit")
+        self.price = data.get("price")
+        self.total = data.get("total")
+
+    def __str__(self):
+        return "%s" % self.code
+
+    def __repr__(self):
+        return "{}: {}".format(self.__class__.__name__, self.type)