view sat/plugins/plugin_xep_0352.py @ 4002:5245b675f7ad

plugin XEP-0313: don't wait for MAM to be retrieved in connection workflow: MAM retrieval can be long, and can be done after connection, message just need to be sorted when being inserted (i.e. frontends must do insort). To avoid blocking connection for too long and result in bad UX and timeout risk, one2one MAM message are not retrieved in background.
author Goffi <goffi@goffi.org>
date Fri, 10 Mar 2023 17:22:45 +0100
parents be6d91572633
children 524856bd7b19
line wrap: on
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#!/usr/bin/env python3


# SAT plugin for Explicit Message Encryption
# Copyright (C) 2009-2021 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 twisted.words.xish import domish
from sat.core.i18n import _, D_
from sat.core.constants import Const as C
from sat.core.log import getLogger

log = getLogger(__name__)

PLUGIN_INFO = {
    C.PI_NAME: "Client State Indication",
    C.PI_IMPORT_NAME: "XEP-0352",
    C.PI_TYPE: C.PLUG_TYPE_XEP,
    C.PI_PROTOCOLS: ["XEP-0352"],
    C.PI_DEPENDENCIES: [],
    C.PI_MAIN: "XEP_0352",
    C.PI_HANDLER: "no",
    C.PI_DESCRIPTION: D_("Notify server when frontend is not actively used, to limit "
                         "traffic and save bandwidth and battery life"),
}

NS_CSI = "urn:xmpp:csi:0"


class XEP_0352(object):

    def __init__(self, host):
        log.info(_("Client State Indication plugin initialization"))
        self.host = host
        host.registerNamespace("csi", NS_CSI)

    def isActive(self, client):
        try:
            if not client._xep_0352_enabled:
                return True
            return client._xep_0352_active
        except AttributeError:
            # _xep_0352_active can not be set if isActive is called before
            # profileConnected has been called
            log.debug("isActive called when XEP-0352 plugin has not yet set the "
                      "attributes")
            return True

    def profileConnected(self, client):
        if (NS_CSI, 'csi') in client.xmlstream.features:
            log.info(_("Client State Indication is available on this server"))
            client._xep_0352_enabled = True
            client._xep_0352_active = True
        else:
            log.warning(_("Client State Indication is not available on this server, some"
                          " bandwidth optimisations can't be used."))
            client._xep_0352_enabled = False

    def setInactive(self, client):
        if self.isActive(client):
            inactive_elt = domish.Element((NS_CSI, 'inactive'))
            client.send(inactive_elt)
            client._xep_0352_active = False
            log.info("inactive state set")

    def setActive(self, client):
        if not self.isActive(client):
            active_elt = domish.Element((NS_CSI, 'active'))
            client.send(active_elt)
            client._xep_0352_active = True
            log.info("active state set")