Implement subnets API for newton

Change-Id: Ia219443bce0ec83451a09d3f0aa0a2a02341d100
Issue-Id: MULTIVIM-19
Signed-off-by: Bin Yang <bin.yang@windriver.com>

2 files changed, 139 insertions, 2 deletions

diff --git a/newton/newton/requests/urls.py b/newton/newton/requests/urls.py
index b215098a..c423d9d4 100644
--- a/newton/newton/requests/urls.py
+++ b/newton/newton/requests/urls.py
@@ -16,14 +16,15 @@ from django.conf.urls import url
 from rest_framework.urlpatterns import format_suffix_patterns
 
 from views import network
+from views import subnet
 from views import limits
 from views import hosts
 
 urlpatterns = [
     url(r'^networks(/(?P<networkid>[0-9a-zA-Z_-]+))?',
         network.Networks.as_view()),
-    url(r'^subnets/(?P<subnetid>[0-9a-zA-Z_-]+)',
-        network.Subnets.as_view()),
+    url(r'^subnets(/(?P<subnetid>[0-9a-zA-Z_-]+))?',
+        subnet.Subnets.as_view()),
     url(r'^limits$', limits.Limits.as_view()),
     url(r'^hosts(/(?P<hostname>[0-9a-zA-Z_-]+))?', hosts.Hosts.as_view()),
 ]
diff --git a/newton/newton/requests/views/subnet.py b/newton/newton/requests/views/subnet.py
new file mode 100644
index 00000000..b057608d
--- /dev/null
+++ b/newton/newton/requests/views/subnet.py
@@ -0,0 +1,136 @@
+# Copyright (c) 2017 Wind River Systems, Inc.
+#
+# 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 logging
+import json
+
+from rest_framework import status
+from rest_framework.response import Response
+from rest_framework.views import APIView
+
+from newton.pub.exceptions import VimDriverNewtonException
+
+from util import VimDriverUtils
+
+logger = logging.getLogger(__name__)
+
+
+class Subnets(APIView):
+    service = {'service_type': 'network',
+               'interface': 'public',
+               'region_name': 'RegionOne'}
+    keys_mapping = [
+        ("project_id", "tenantId"),
+        ("network_id", "networkId"),
+        ("ip_version", "ipVersion"),
+        ("enable_dhcp", "enableDhcp"),
+        ("gateway_ip", "gatewayIp"),
+        ("dns_nameservers", "dnsNameservers"),
+        ("host_routes", "hostRoutes"),
+        ("allocation_pools", "allocationPools"),
+    ]
+
+    def get(self, request, vimid="", tenantid="", subnetid=""):
+        logger.debug("Subnets--get::> %s" % request.data)
+        try:
+            # prepare request resource to vim instance
+            req_resouce = "v2.0/subnets"
+            if subnetid:
+                req_resouce += "/%s" % subnetid
+
+            query = VimDriverUtils.get_query_part(request)
+            if query:
+                req_resouce += "?%s" % query
+
+            vim = VimDriverUtils.get_vim_info(vimid)
+            sess = VimDriverUtils.get_session(vim, tenantid)
+            resp = sess.get(req_resouce, endpoint_filter=self.service)
+            content = resp.json()
+            vim_dict = {
+                "vimName": vim["name"],
+                "vimId": vim["vimId"],
+                "tenantId": tenantid,
+            }
+            content.update(vim_dict)
+
+            if not subnetid:
+                # convert the key naming in subnets
+                for subnet in content["subnets"]:
+                    VimDriverUtils.replace_key_by_mapping(subnet,
+                                                          self.keys_mapping)
+            else:
+                # convert the key naming in the subnet specified by id
+                old_subnet = content["subnet"]
+                del content["subnet"]
+                VimDriverUtils.replace_key_by_mapping(old_subnet,
+                                                      self.keys_mapping)
+                content.update(old_subnet)
+
+            return Response(data=content, status=resp.status_code)
+        except VimDriverNewtonException as e:
+            return Response(data={'error': e.content}, status=e.status_code)
+        except Exception as e:
+            return Response(data={'error': str(e)},
+                            status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+
+    def post(self, request, vimid="", tenantid="", subnetid=""):
+        logger.debug("Subnets--post::> %s" % request.data)
+        try:
+            # prepare request resource to vim instance
+            req_resouce = "v2.0/subnets"
+
+            vim = VimDriverUtils.get_vim_info(vimid)
+            sess = VimDriverUtils.get_session(vim, tenantid)
+            subnet = request.data
+            VimDriverUtils.replace_key_by_mapping(subnet,
+                                                  self.keys_mapping, True)
+            req_body = json.JSONEncoder().encode({"subnet": subnet})
+            resp = sess.post(req_resouce, data=req_body,
+                             endpoint_filter=self.service)
+            resp_body = resp.json()["subnet"]
+            VimDriverUtils.replace_key_by_mapping(resp_body, self.keys_mapping)
+            vim_dict = {
+                "vimName": vim["name"],
+                "vimId": vim["vimId"],
+                "tenantId": tenantid,
+            }
+            resp_body.update(vim_dict)
+            return Response(data=resp_body, status=resp.status_code)
+        except VimDriverNewtonException as e:
+            return Response(data={'error': e.content}, status=e.status_code)
+        except Exception as e:
+            return Response(data={'error': str(e)},
+                            status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+        pass
+
+    def delete(self, request, vimid="", tenantid="", subnetid=""):
+        logger.debug("Subnets--delete::> %s" % request.data)
+        try:
+            # prepare request resource to vim instance
+            req_resouce = "v2.0/subnets"
+            if subnetid:
+                req_resouce += "/%s" % subnetid
+            query = VimDriverUtils.get_query_part(request)
+            if query:
+                req_resouce += "?%s" % query
+
+            vim = VimDriverUtils.get_vim_info(vimid)
+            sess = VimDriverUtils.get_session(vim, tenantid)
+            resp = sess.delete(req_resouce, endpoint_filter=self.service)
+            return Response(status=resp.status_code)
+        except VimDriverNewtonException as e:
+            return Response(data={'error': e.content}, status=e.status_code)
+        except Exception as e:
+            return Response(data={'error': str(e)},
+                            status=status.HTTP_500_INTERNAL_SERVER_ERROR)
+        pass