Implement client deregistration

feudal/backend/models/__init__.py

@@ -134,6 +134,13 @@ class Service(models.Model):
     def __str__(self):
         return self.name
 
+    def remove_service(self):
+        for deployment in Deployment.objects.filter(
+            vo__services=self,
+        ):
+            deployment.service_removed(self)
+        self.delete()
+
     def handle_vo_deployments(self):
         for vo in self.vos.all():
 
@@ -273,6 +280,10 @@ class Deployment(models.Model):
         if self.state_target == 'deployed':
             item.user_deploy()
 
+    def service_removed(self, service):
+        LOGGER.debug(self.msg('Removing service {}'.format(service)))
+        LOGGER.debug('TODO implement service removal')
+
     def publish_to_client(self):
         # avoiding circular dependencies here
         from .serializers.clients import DeploymentSerializer

feudal/backend/views/client_urls.py

@@ -6,4 +6,5 @@ URLPATTERNS = [
     url(r'^deployments', clients.DeploymentsView.as_view()),
     url(r'^config', clients.ConfigurationView.as_view()),
     url(r'^response', clients.ResponseView.as_view()),
+    url(r'^deregister', clients.DeregisterView.as_view()),
 ]

feudal/backend/views/clients.py

@@ -164,6 +164,30 @@ class ConfigurationView(views.APIView):
         return Response(response)
 
 
+class DeregisterView(views.APIView):
+    authentication_classes = AUTHENTICATION_CLASSES
+
+    def put(self, request):
+
+        # the site where client is located
+        client_site = None
+        try:
+            client_site = request.user.site
+        except models.Site.DoesNotExist:
+            raise ImproperlyConfigured('client has no site')
+
+        # deregister the client / its services / its site
+        # we expect all deployments at the clients to be removed (and therefore simply delete them all)
+        LOGGER.info('[DEREG] Client %s from site %s is deregistering', request.user, client_site)
+
+        for service in client_site.services.all():
+            LOGGER.info('[DEREG] Triggering service removal %s', service)
+            service.remove_service()
+
+        response = 'Success deregistering'
+        return Response(response)
+
+
 def response_view_error(err):
     return Response(
         data={'error': err},