--- a/src/ztfy/utils/request.py	Mon Sep 24 08:54:09 2012 +0200
+++ b/src/ztfy/utils/request.py	Mon Sep 24 19:42:40 2012 +0200
@@ -15,22 +15,64 @@
 
 
 # import standard packages
+from cStringIO import StringIO
 
 # import Zope3 interfaces
 from zope.annotation.interfaces import IAnnotations
 from zope.publisher.interfaces import IRequest
-from zope.security.interfaces import NoInteraction
+from zope.security.interfaces import NoInteraction, IParticipation, IPrincipal
 
 # import local interfaces
 
 # import Zope3 packages
-from zope.security.management import getInteraction
+from zope.interface import implements
+from zope.publisher.http import HTTPRequest
+from zope.security.management import getInteraction, newInteraction, endInteraction
 
 # import local packages
 
 from ztfy.utils import _
 
 
+#
+# Participations functions
+#
+
+class Principal(object):
+    """Basic principal"""
+
+    implements(IPrincipal)
+
+    def __init__(self, id, title=u'', description=u''):
+        self.id = id
+        self.title = title
+        self.description = description
+
+
+class Participation(HTTPRequest):
+    """Basic participation"""
+
+    implements(IParticipation)
+
+    def __init__(self, principal):
+        super(Participation, self).__init__(StringIO(), {})
+        self.setPrincipal(principal)
+        self.interaction = None
+
+
+def newParticipation(principal, title=u'', description=u''):
+    principal = Principal(principal)
+    newInteraction(Participation(principal))
+
+
+def endParticipation():
+    endInteraction()
+
+
+#
+# Request handling functions
+#
+
 def getRequest():
     """Extract request from current interaction"""
     interaction = getInteraction()