view src/plugins/plugin_xep_0092.py @ 2307:8fa7edd0da24

plugin Pubsub Hook: first draft: This new plugin allow to attach an external action to a Pubsub event (i.e. notification). Hook can be persitent accross restarts, or temporary (will be deleted on profile disconnection). Only Python files are handled for now. In the future, it may make sense to move hooks in a generic plugin which could be used by ad-hoc commands, messages, pubsub, etc.
author Goffi <goffi@goffi.org>
date Wed, 05 Jul 2017 15:05:47 +0200
parents a543eda2c923
children 8b37a62336c3
line wrap: on
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SàT plugin for Software Version (XEP-0092)
# 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 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