--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/plugins/plugin_xep_0203.py	Fri Dec 19 11:38:24 2014 +0100
@@ -0,0 +1,84 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# SAT plugin for Delayed Delivery (XEP-0203)
+# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org)
+# Copyright (C) 2013, 2014 Adrien Cossa (souliane@mailoo.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from sat.core.i18n import _
+from sat.core.log import getLogger
+log = getLogger(__name__)
+
+from wokkel import disco, iwokkel, delay
+try:
+    from twisted.words.protocols.xmlstream import XMPPHandler
+except ImportError:
+    from wokkel.subprotocols import XMPPHandler
+from zope.interface import implements
+
+
+NS_DD = 'urn:xmpp:delay'
+
+PLUGIN_INFO = {
+    "name": "Delayed Delivery",
+    "import_name": "XEP-0203",
+    "type": "XEP",
+    "protocols": ["XEP-0203"],
+    "main": "XEP_0203",
+    "handler": "yes",
+    "description": _("""Implementation of Delayed Delivery""")
+}
+
+
+class XEP_0203(object):
+
+    def __init__(self, host):
+        log.info(_("Delayed Delivery plugin initialization"))
+        self.host = host
+
+    def getHandler(self, profile):
+        return XEP_0203_handler(self, profile)
+
+    def delay(self, stamp, sender=None, desc='', parent=None):
+        """Build a delay element, eventually append it to the given parent element.
+
+        @param stamp (datetime): offset-aware timestamp of the original sending.
+        @param sender (JID): entity that originally sent or delayed the message.
+        @param desc (unicode): optional natural language description.
+        @param parent (domish.Element): add the delay element to this element.
+        @return: the delay element (domish.Element)
+        """
+        elt = delay.Delay(stamp, sender).toElement()
+        if desc:
+            elt.addContent(desc)
+        if parent:
+            parent.addChild(elt)
+        return elt
+
+
+class XEP_0203_handler(XMPPHandler):
+    implements(iwokkel.IDisco)
+
+    def __init__(self, plugin_parent, profile):
+        self.plugin_parent = plugin_parent
+        self.host = plugin_parent.host
+        self.profile = profile
+
+    def getDiscoInfo(self, requestor, target, nodeIdentifier=''):
+        return [disco.DiscoFeature(NS_DD)]
+
+    def getDiscoItems(self, requestor, target, nodeIdentifier=''):
+        return []

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/test/test_plugin_xep_0203.py	Fri Dec 19 11:38:24 2014 +0100
@@ -0,0 +1,65 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# SAT: a jabber client
+# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jérôme Poisson (goffi@goffi.org)
+# Copyright (C) 2013, 2014 Adrien Cossa (souliane@mailoo.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+""" Plugin XEP-0203 """
+
+from sat.test import helpers
+from sat.plugins.plugin_xep_0203 import XEP_0203
+from twisted.words.xish import domish
+from twisted.words.protocols.jabber.jid import JID
+from dateutil.tz import tzutc
+import datetime
+
+NS_PUBSUB = 'http://jabber.org/protocol/pubsub'
+
+
+class XEP_0203Test(helpers.SatTestCase):
+
+    def setUp(self):
+        self.host = helpers.FakeSAT()
+        self.plugin = XEP_0203(self.host)
+
+    def test_delay(self):
+        delay_xml = """
+          <delay xmlns='urn:xmpp:delay'
+             from='capulet.com'
+             stamp='2002-09-10T23:08:25Z'>
+            Offline Storage
+          </delay>
+        """
+        message_xml = """
+        <message
+            from='romeo@montague.net/orchard'
+            to='juliet@capulet.com'
+            type='chat'>
+          <body>text</body>
+          %s
+        </message>
+        """ % delay_xml
+
+        parent = domish.Element((None, 'message'))
+        parent['from'] = 'romeo@montague.net/orchard'
+        parent['to'] = 'juliet@capulet.com'
+        parent['type'] = 'chat'
+        parent.addElement('body', None, 'text')
+        stamp = datetime.datetime(2002, 9, 10, 23, 8, 25, tzinfo=tzutc())
+        elt = self.plugin.delay(stamp, JID('capulet.com'), 'Offline Storage', parent)
+        self.assertEqualXML(elt.toXml(), delay_xml, True)
+        self.assertEqualXML(parent.toXml(), message_xml, True)