Add view for editing global cluster config

apps/clustering/views.py

@@ -3,17 +3,19 @@ from __future__ import absolute_import
 from django.shortcuts import render_to_response
 from django.template import RequestContext
 from django.utils.translation import ugettext_lazy as _
-from django.shortcuts import get_object_or_404
+from django.shortcuts import get_object_or_404, HttpResponseRedirect
 from django.db.models.loading import get_model
 from django.http import Http404
 from django.core.exceptions import PermissionDenied
+from django.contrib import messages
 
 from permissions.models import Permission
 from common.utils import encapsulate
 from acls.models import AccessEntry
 
-from .models import Node
-from .permissions import PERMISSION_NODES_VIEW
+from .forms import ClusteringConfigForm
+from .models import Node, ClusteringConfig
+from .permissions import PERMISSION_NODES_VIEW, PERMISSION_EDIT_CLUSTER_CONFIGURATION
 
 
 def node_list(request):
@@ -65,3 +67,34 @@ def node_workers(request, node_pk):
 
     return render_to_response('generic_list.html', context,
         context_instance=RequestContext(request))
+
+
+def clustering_config_edit(request):
+    Permission.objects.check_permissions(request.user, [PERMISSION_EDIT_CLUSTER_CONFIGURATION])
+
+    cluster_config = ClusteringConfig.get()
+    
+    post_action_redirect = None
+
+    previous = request.POST.get('previous', request.GET.get('previous', request.META.get('HTTP_REFERER', '/')))
+    next = request.POST.get('next', request.GET.get('next', post_action_redirect if post_action_redirect else request.META.get('HTTP_REFERER', '/')))
+    
+
+    if request.method == 'POST':
+        form = ClusteringConfigForm(data=request.POST)
+        if form.is_valid():
+            try:
+                form.save()
+            except Exception, exc:
+                messages.error(request, _(u'Error trying to edit cluster configuration; %s') % exc)
+            else:
+                messages.success(request, _(u'Cluster configuration edited successfully.'))
+                return HttpResponseRedirect(next)
+    else:
+        form = ClusteringConfigForm(instance=cluster_config)
+
+    return render_to_response('generic_form.html', {
+        'form': form,
+        'object': cluster_config,
+        'title': _(u'Edit cluster configuration')
+    }, context_instance=RequestContext(request))