--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/plugins/plugin_exp_events.py	Thu Apr 27 00:55:02 2017 +0200
@@ -0,0 +1,112 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# SAT plugin to detect language (experimental)
+# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.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.constants import Const as C
+from sat.core.log import getLogger
+log = getLogger(__name__)
+from twisted.internet import defer
+from twisted.words.protocols.jabber import jid
+from twisted.words.xish import domish
+from wokkel import pubsub
+
+
+PLUGIN_INFO = {
+    C.PI_NAME: "Event plugin",
+    C.PI_IMPORT_NAME: "events",
+    C.PI_TYPE: "EXP",
+    C.PI_PROTOCOLS: [],
+    C.PI_DEPENDENCIES: ["XEP-0060"],
+    C.PI_MAIN: "Events",
+    C.PI_HANDLER: "no",
+    C.PI_DESCRIPTION: _("""Experimental implementation of XMPP events management""")
+}
+
+NS_EVENT = 'org.salut-a-toi.event:0'
+
+
+class Events(object):
+    """Q&D module to handle event attendance answer, experimentation only"""
+
+    def __init__(self, host):
+        log.info(_(u"Event plugin initialization"))
+        self.host = host
+        self._p = self.host.plugins["XEP-0060"]
+        host.bridge.addMethod("eventGet", ".plugin",
+                              in_sign='sss', out_sign='a{ss}',
+                              method=self._eventGet,
+                              async=True)
+        host.bridge.addMethod("eventSet", ".plugin",
+                              in_sign='ssa{ss}s', out_sign='',
+                              method=self._eventSet,
+                              async=True)
+
+    def _eventGet(self, service, node, profile_key):
+        service = jid.JID(service) if service else None
+        node = node if node else NS_EVENT
+        client = self.host.getClient(profile_key)
+        return self.eventGet(client, service, node)
+
+    @defer.inlineCallbacks
+    def eventGet(self, client, service, node):
+        """Retrieve attendance from event node
+
+        @param service(unicode, None): PubSub service
+        @param node(unicode): PubSub node of the event
+        @return (dict): a dict with current attendance status,
+            an empty dict is returned if nothing has been answered yed
+        """
+        items, metadata = yield self._p.getItems(service, node, item_ids=[client.jid.userhost()], profile_key=client.profile)
+        try:
+            event_elt = next(items[0].elements((NS_EVENT, u'event')))
+        except IndexError:
+            # no item found, event data are not set yet
+            defer.returnValue({})
+        data = {}
+        for key in (u'attend', u'guests'):
+            try:
+                data[key] = event_elt[key]
+            except KeyError:
+                continue
+        defer.returnValue(data)
+
+    def _eventSet(self, service, node, event_data,  profile_key):
+        service = jid.JID(service) if service else None
+        node = node if node else NS_EVENT
+        client = self.host.getClient(profile_key)
+        return self.eventSet(client, service, node, event_data)
+
+    def eventSet(self, client, service, node, data):
+        """Set or update attendance data in event node
+
+        @param service(unicode, None): PubSub service
+        @param node(unicode): PubSub node of the event
+        @param data(dict[unicode, unicode]): data to update
+            key can be:
+                attend: one of "yes", "no", "maybe"
+                guests: an int
+        """
+        event_elt = domish.Element((NS_EVENT, 'event'))
+        for key in (u'attend', u'guests'):
+            try:
+                event_elt[key] = data.pop(key)
+            except KeyError:
+                pass
+        item_elt = pubsub.Item(id=client.jid.userhost(), payload=event_elt)
+        return self._p.publish(service, node, items=[item_elt], profile_key=client.profile)