dashboard: add acl data to detail view's context

circle/dashboard/views.py

 from django.core import signing
+from django.http import HttpResponse
+from django.utils.translation import ugettext_lazy as _
 from django.views.generic import TemplateView, DetailView
 
 from django_tables2 import SingleTableView
+from guardian.shortcuts import (get_users_with_perms, get_groups_with_perms,
+                                get_perms)
+from tables import VmListTable
 
 from vm.models import Instance
 
@@ -24,6 +29,28 @@ class IndexView(TemplateView):
         return context
 
 
+def first_common_element(a, b):
+    for i in a:
+        if i in b:
+            return i
+    return None
+
+
+def get_acl_data(obj):
+    levels = obj._meta.permissions
+    levelids = [id for (id, name) in levels]
+    users = get_users_with_perms(obj, with_group_users=False)
+    users = [{'user': u,
+              'perm': first_common_element(levelids, get_perms(u, obj))}
+             for u in users]
+    groups = get_groups_with_perms(obj)
+    groups = [{'group': g,
+               'perm': first_common_element(levelids, get_perms(g, obj))}
+              for g in groups]
+    return {'users': users, 'groups': groups, 'levels': levels,
+            'url': obj.get_absolute_url()}
+
+
 class VmDetailView(DetailView):
     template_name = "dashboard/vm-detail.html"
     queryset = Instance.objects.all()
@@ -39,6 +66,7 @@ class VmDetailView(DetailView):
             context.update({
                 'vnc_url': '%s' % value
             })
+        context['acl'] = get_acl_data(instance)
         return context