play with somort of permission management

lib/mixins/__init__.py

@@ -0,0 +1,20 @@
+from lib import permissions
+
+
+class PermissionsAdminMixin:
+    def has_add_permission(self, request, obj=None):
+        """If a group right is not set :)
+        Allways be able to create a version
+        """
+        return permissions(obj) if obj else True
+
+    def has_change_permission(self, request, obj=None):
+        """Versions are immutable """
+        return permissions(obj) if obj else True
+
+    def has_delete_permission(self, request, obj=None):
+        """Versions are immutable """
+        return permissions(obj) if obj else True
+
+    def has_view_permissions(selfself, request, obj=None):
+        return True