Openstack networkmanager impl. added

implementation/network/OpenstackNetworkManager.py

+from typing import Optional
+
+from openstack.exceptions import ResourceNotFound
+
+from interface.network.Network import Network
+from interface.network.NetworkManager import NetworkManager
+
+
+class OpenstackNetworkManager(NetworkManager):
+
+    def __init__(self, openstack) -> None:
+        super().__init__()
+
+        self.openstack = openstack
+
+    @staticmethod
+    def os_network_to_rc_network(os_network):
+        return Network(
+            os_network.id,
+            os_network.name,
+            os_network.status,
+            os_network.subnet_ids,
+            os_network.created_at
+        )
+
+    def create(self) -> Network:
+        os_network = self.openstack.network.create_network()
+
+        return self.os_network_to_rc_network(os_network)
+
+    def get(self, id) -> Optional[Network]:
+        try:
+            os_network = self.openstack.network.get_network(id)
+        except ResourceNotFound:
+            return None
+
+        return self.os_network_to_rc_network(os_network)
+
+    def delete(self, id) -> bool:
+        try:
+            self.openstack.network.delete_network(id)
+        except ResourceNotFound:
+            return False
+
+        return True
+
+    def list(self) -> []:
+        networks = []
+
+        for os_network in self.openstack.network.networks():
+            networks.append(self.os_network_to_rc_network(os_network))
+
+        return networks