add last global time refresh

sapl/api/urls.py

@@ -5,7 +5,7 @@ from rest_framework.routers import DefaultRouter
 import sapl.api.base.urls
 import sapl.api.materia.urls
 import sapl.api.sessao.urls
-from sapl.api.views import ModelChoiceView
+from sapl.api.views import ModelChoiceView, TimeRefreshDatabaseView
 
 from .apps import AppConfig
 
@@ -22,6 +22,8 @@ urlpatterns_router = router.urls
 urlpatterns_api = [
     url(r'^model/(?P<content_type>\d+)/(?P<pk>\d*)$',
         ModelChoiceView.as_view(), name='model_list'),
+    url(r'time_refresh$',
+        TimeRefreshDatabaseView.as_view(), name="time_refresh")
 ]
 
 if settings.DEBUG:

sapl/api/views.py

@@ -1,8 +1,12 @@
+from django.apps import apps
 from django.contrib.contenttypes.models import ContentType
 from rest_framework.generics import ListAPIView
-from rest_framework.permissions import (IsAuthenticated)
+from rest_framework.permissions import (IsAuthenticated, AllowAny)
+from rest_framework.response import Response
+from rest_framework.views import APIView
 
 from sapl.api.serializers import ModelChoiceSerializer
+from sapl.rules.apps import AppConfig
 
 
 class ModelChoiceView(ListAPIView):
@@ -24,3 +28,11 @@ class ModelChoiceView(ListAPIView):
 
     def get_queryset(self):
         return self.model.objects.all()
+
+
+class TimeRefreshDatabaseView(APIView):
+
+    permission_classes = (AllowAny,)
+
+    def get(self, request, *args, **kwargs):
+        return Response({'last_global_refresh_time': apps.get_app_config('rules').time_refresh})

sapl/rules/apps.py

@@ -6,7 +6,10 @@ from django.contrib.auth import get_user_model
 from django.contrib.auth.management import _get_all_permissions
 from django.core import exceptions
 from django.db import models, router
+from django.db.models.signals import post_save, post_delete
 from django.db.utils import DEFAULT_DB_ALIAS
+from django.dispatch.dispatcher import receiver
+from django.utils import timezone
 from django.utils.translation import string_concat
 from django.utils.translation import ugettext_lazy as _
 import reversion
@@ -21,6 +24,7 @@ class AppConfig(django.apps.AppConfig):
     name = 'sapl.rules'
     label = 'rules'
     verbose_name = _('Regras de Acesso')
+    time_refresh = timezone.now()
 
 
 def create_proxy_permissions(
@@ -254,3 +258,9 @@ models.signals.post_migrate.connect(
 models.signals.pre_delete.connect(
     receiver=revision_pre_delete_signal,
     dispatch_uid="pre_delete_signal")
+
+
+@receiver([post_save, post_delete])
+def refresh_time_update_base(sender, instance, **kwargs):
+    rule_app = apps.get_app_config('rules')
+    rule_app.time_refresh = timezone.now()