Openstack subnetmanager impl. added

implementation/network/OpenstackSubnetManager.py

+from typing import Optional
+
+from openstack.exceptions import ResourceNotFound
+
+from interface.network.Subnet import Subnet
+from interface.network.SubnetManager import SubnetManager
+
+
+class OpenstackSubnetManager(SubnetManager):
+
+    def __init__(self, openstack) -> None:
+        super().__init__()
+
+        self.openstack = openstack
+
+    @staticmethod
+    def os_subnet_to_rc_subnet(os_subnet):
+        return Subnet(
+            os_subnet.id,
+            os_subnet.network_id,
+            os_subnet.name,
+            os_subnet.cidr,
+            os_subnet.ip_version,
+            os_subnet.gateway_ip,
+            os_subnet.is_dhcp_enabled,
+            os_subnet.created_at
+        )
+
+    def create(self, network_id, ip_version, cidr) -> Subnet:
+        os_subnet = self.openstack.network.create_subnet(
+            network_id=network_id,
+            ip_version=ip_version,
+            cidr=cidr
+        )
+
+        return self.os_subnet_to_rc_subnet(os_subnet)
+
+    def get(self, id) -> Optional[Subnet]:
+        try:
+            os_subnet = self.openstack.network.get_subnet(id)
+        except ResourceNotFound:
+            return None
+
+        return self.os_subnet_to_rc_subnet(os_subnet)
+
+    def delete(self, id) -> bool:
+        try:
+            self.openstack.network.delete_subnet(id=id)
+        except ResourceNotFound:
+            return False
+
+        return True
+
+    def list(self) -> []:
+        subnets = []
+
+        for os_subnet in self.openstack.network.subnets():
+            subnets.append(self.os_subnet_to_rc_subnet(os_subnet))
+
+        return subnets