diff -r 3198f3bcf67d -r c7ec73c1d8be src/pyams_skin/viewlet/extension/user_report.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_skin/viewlet/extension/user_report.py	Wed Jun 15 12:28:18 2016 +0200
@@ -0,0 +1,52 @@
+#
+# Copyright (c) 2008-2015 Thierry Florac <tflorac AT ulthar.net>
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+
+__docformat__ = 'restructuredtext'
+
+
+# import standard library
+
+# import interfaces
+from pyams_skin.interfaces.extension import IUserReportInfo, ACTIVATED_ON_FRONT, ACTIVATED_ON_BACK
+from pyams_skin.interfaces.viewlet import IJSExtensionsViewletManager
+from pyams_skin.layer import IPyAMSLayer
+try:
+    from pyams_zmi.layer import IAdminLayer
+except ImportError:
+    IAdminLayer = None
+
+# import packages
+from pyams_template.template import template_config
+from pyams_viewlet.viewlet import viewlet_config, Viewlet
+
+
+@viewlet_config(name='user-report', manager=IJSExtensionsViewletManager)
+@template_config(template='templates/user_report.pt', layer=IPyAMSLayer)
+class UserReportViewlet(Viewlet):
+    """Google Analytics viewlet"""
+
+    def __new__(cls, context, request, view, manager):
+        info = IUserReportInfo(request.root)
+        if not info.enabled:
+            return None
+        if IAdminLayer is None:
+            if info.activation_mode == ACTIVATED_ON_BACK:
+                return None
+        else:
+            if ((info.activation_mode == ACTIVATED_ON_FRONT) and IAdminLayer.providedBy(request)) or \
+               ((info.activation_mode == ACTIVATED_ON_BACK) and not IAdminLayer.providedBy(request)):
+                return None
+        return Viewlet.__new__(cls)
+
+    @property
+    def config(self):
+        return IUserReportInfo(self.request.root)