1 files changed, 29 insertions, 0 deletions
diff --git a/slixmpp/plugins/xep_0060/stanza/base.py b/slixmpp/plugins/xep_0060/stanza/base.py
new file mode 100644
index 00000000..b8f3d6cc
--- /dev/null
+++ b/slixmpp/plugins/xep_0060/stanza/base.py
@@ -0,0 +1,29 @@
+"""
+    Slixmpp: The Slick XMPP Library
+    Copyright (C) 2011  Nathanael C. Fritz
+    This file is part of Slixmpp.
+
+    See the file LICENSE for copying permission.
+"""
+
+from slixmpp.xmlstream import ET
+
+
+class OptionalSetting(object):
+
+    interfaces = set(('required',))
+
+    def set_required(self, value):
+        if value in (True, 'true', 'True', '1'):
+            self.xml.append(ET.Element("{%s}required" % self.namespace))
+        elif self['required']:
+            self.del_required()
+
+    def get_required(self):
+        required = self.xml.find("{%s}required" % self.namespace)
+        return required is not None
+
+    def del_required(self):
+        required = self.xml.find("{%s}required" % self.namespace)
+        if required is not None:
+            self.xml.remove(required)