--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sat/plugins/plugin_xep_0092.py	Mon Apr 02 19:44:50 2018 +0200
@@ -0,0 +1,122 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# SàT plugin for Software Version (XEP-0092)
+# Copyright (C) 2009-2018 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 twisted.internet import reactor, defer
+from twisted.words.protocols.jabber import jid
+from wokkel import compat
+from sat.core import exceptions
+from sat.core.log import getLogger
+log = getLogger(__name__)
+
+NS_VERSION = "jabber:iq:version"
+TIMEOUT = 10
+
+PLUGIN_INFO = {
+    C.PI_NAME: "Software Version Plugin",
+    C.PI_IMPORT_NAME: "XEP-0092",
+    C.PI_TYPE: "XEP",
+    C.PI_PROTOCOLS: ["XEP-0092"],
+    C.PI_DEPENDENCIES: [],
+    C.PI_RECOMMENDATIONS: [C.TEXT_CMDS],
+    C.PI_MAIN: "XEP_0092",
+    C.PI_HANDLER: "no", # version is already handler in core.xmpp module
+    C.PI_DESCRIPTION: _("""Implementation of Software Version""")
+}
+
+
+class XEP_0092(object):
+
+    def __init__(self, host):
+        log.info(_("Plugin XEP_0092 initialization"))
+        self.host = host
+        host.bridge.addMethod("getSoftwareVersion", ".plugin", in_sign='ss', out_sign='(sss)', method=self._getVersion, async=True)
+        try:
+            self.host.plugins[C.TEXT_CMDS].addWhoIsCb(self._whois, 50)
+        except KeyError:
+            log.info(_("Text commands not available"))
+
+    def _getVersion(self, entity_jid_s, profile_key):
+        def prepareForBridge(data):
+            name, version, os = data
+            return (name or '', version or '', os or '')
+        d = self.getVersion(jid.JID(entity_jid_s), profile_key)
+        d.addCallback(prepareForBridge)
+        return d
+
+    def getVersion(self, jid_, profile_key=C.PROF_KEY_NONE):
+        """ Ask version of the client that jid_ is running
+        @param jid_: jid from who we want to know client's version
+        @param profile_key: %(doc_profile_key)s
+        @return (tuple): a defered which fire a tuple with the following data (None if not available):
+                 - name: Natural language name of the software
+                 - version: specific version of the software
+                 - os: operating system of the queried entity
+        """
+        client = self.host.getClient(profile_key)
+        def getVersion(dummy):
+            iq_elt = compat.IQ(client.xmlstream, 'get')
+            iq_elt['to'] = jid_.full()
+            iq_elt.addElement("query", NS_VERSION)
+            d = iq_elt.send()
+            d.addCallback(self._gotVersion)
+            return d
+        d = self.host.checkFeature(client, NS_VERSION, jid_)
+        d.addCallback(getVersion)
+        reactor.callLater(TIMEOUT, d.cancel) # XXX: timeout needed because some clients don't answer the IQ
+        return d
+
+    def _gotVersion(self, iq_elt):
+        try:
+            query_elt = iq_elt.elements(NS_VERSION, 'query').next()
+        except StopIteration:
+            raise exceptions.DataError
+        ret = []
+        for name in ('name', 'version', 'os'):
+            try:
+                data_elt = query_elt.elements(NS_VERSION, name).next()
+                ret.append(unicode(data_elt))
+            except StopIteration:
+                ret.append(None)
+
+        return tuple(ret)
+
+
+    def _whois(self, client, whois_msg, mess_data, target_jid):
+        """ Add software/OS information to whois """
+        def versionCb(version_data):
+            name, version, os = version_data
+            if name:
+                whois_msg.append(_("Client name: %s") % name)
+            if version:
+                whois_msg.append(_("Client version: %s") % version)
+            if os:
+                whois_msg.append(_("Operating system: %s") % os)
+        def versionEb(failure):
+            failure.trap(exceptions.FeatureNotFound, defer.CancelledError)
+            if failure.check(failure,exceptions.FeatureNotFound):
+                whois_msg.append(_("Software version not available"))
+            else:
+                whois_msg.append(_("Client software version request timeout"))
+
+        d = self.getVersion(target_jid, client.profile)
+        d.addCallbacks(versionCb, versionEb)
+        return d
+