view sat/plugins/plugin_xep_0184.py @ 3405:ecdb3728749e

plugin XEP-0353: Jingle Message Initiation implementation: This plugin uses the new `XEP-0166_initiate` trigger to initiate a Jingle session with messages if the peer jid has no resource specified. On reception, if the sender is not in our roster, a confirmation is requested to user to avoid leaking presence and IP. If user refuses the session for somebody not in roster, nothing is sent at all (the request is just ignored).
author Goffi <goffi@goffi.org>
date Thu, 12 Nov 2020 14:53:15 +0100
parents 559a625a236b
children 31628770a15a
line wrap: on
line source

#!/usr/bin/env python3


# SAT plugin for managing xep-0184
# Copyright (C) 2009-2016 Geoffrey POUZET (chteufleur@kingpenguin.tk)

# 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
from twisted.internet import reactor
from twisted.words.protocols.jabber import xmlstream, jid
from twisted.words.xish import domish

log = getLogger(__name__)

from wokkel import disco, iwokkel
from zope.interface import implementer

try:
    from twisted.words.protocols.xmlstream import XMPPHandler
except ImportError:
    from wokkel.subprotocols import XMPPHandler


NS_MESSAGE_DELIVERY_RECEIPTS = "urn:xmpp:receipts"

MSG = "message"

MSG_CHAT = "/" + MSG + '[@type="chat"]'
MSG_CHAT_MESSAGE_DELIVERY_RECEIPTS_REQUEST = (
    MSG_CHAT + '/request[@xmlns="' + NS_MESSAGE_DELIVERY_RECEIPTS + '"]'
)
MSG_CHAT_MESSAGE_DELIVERY_RECEIPTS_RECEIVED = (
    MSG_CHAT + '/received[@xmlns="' + NS_MESSAGE_DELIVERY_RECEIPTS + '"]'
)

MSG_NORMAL = "/" + MSG + '[@type="normal"]'
MSG_NORMAL_MESSAGE_DELIVERY_RECEIPTS_REQUEST = (
    MSG_NORMAL + '/request[@xmlns="' + NS_MESSAGE_DELIVERY_RECEIPTS + '"]'
)
MSG_NORMAL_MESSAGE_DELIVERY_RECEIPTS_RECEIVED = (
    MSG_NORMAL + '/received[@xmlns="' + NS_MESSAGE_DELIVERY_RECEIPTS + '"]'
)


PARAM_KEY = "Privacy"
PARAM_NAME = "Enable message delivery receipts"
ENTITY_KEY = PARAM_KEY + "_" + PARAM_NAME


PLUGIN_INFO = {
    C.PI_NAME: "XEP-0184 Plugin",
    C.PI_IMPORT_NAME: "XEP-0184",
    C.PI_TYPE: "XEP",
    C.PI_PROTOCOLS: ["XEP-0184"],
    C.PI_DEPENDENCIES: [],
    C.PI_MAIN: "XEP_0184",
    C.PI_HANDLER: "yes",
    C.PI_DESCRIPTION: _("""Implementation of Message Delivery Receipts"""),
}


STATUS_MESSAGE_DELIVERY_RECEIVED = "delivered"
TEMPO_DELETE_WAITING_ACK_S = 300  # 5 min


class XEP_0184(object):
    """
    Implementation for XEP 0184.
    """

    params = """
    <params>
    <individual>
    <category name="%(category_name)s" label="%(category_label)s">
        <param name="%(param_name)s" label="%(param_label)s" value="true" type="bool" security="0"/>
     </category>
    </individual>
    </params>
    """ % {
        "category_name": PARAM_KEY,
        "category_label": _(PARAM_KEY),
        "param_name": PARAM_NAME,
        "param_label": _("Enable message delivery receipts"),
    }

    def __init__(self, host):
        log.info(_("Plugin XEP_0184 (message delivery receipts) initialization"))
        self.host = host
        self._dictRequest = dict()

        # parameter value is retrieved before each use
        host.memory.updateParams(self.params)

        host.trigger.add("sendMessage", self.sendMessageTrigger)
        host.bridge.addSignal(
            "messageState", ".plugin", signature="sss"
        )  # message_uid, status, profile

    def getHandler(self, client):
        return XEP_0184_handler(self, client.profile)

    def sendMessageTrigger(
        self, client, mess_data, pre_xml_treatments, post_xml_treatments
    ):
        """Install SendMessage command hook """

        def treatment(mess_data):
            message = mess_data["xml"]
            message_type = message.getAttribute("type")

            if self._isActif(client.profile) and (
                message_type == "chat" or message_type == "normal"
            ):
                message.addElement("request", NS_MESSAGE_DELIVERY_RECEIPTS)
                uid = mess_data["uid"]
                msg_id = message.getAttribute("id")
                self._dictRequest[msg_id] = uid
                reactor.callLater(
                    TEMPO_DELETE_WAITING_ACK_S, self._clearDictRequest, msg_id
                )
                log.debug(
                    _(
                        "[XEP-0184] Request acknowledgment for message id {}".format(
                            msg_id
                        )
                    )
                )

            return mess_data

        post_xml_treatments.addCallback(treatment)
        return True

    def onMessageDeliveryReceiptsRequest(self, msg_elt, client):
        """This method is called on message delivery receipts **request** (XEP-0184 #7)
        @param msg_elt: message element
        @param client: %(doc_client)s"""
        from_jid = jid.JID(msg_elt["from"])

        if self._isActif(client.profile) and client.roster.isPresenceAuthorised(from_jid):
            received_elt_ret = domish.Element((NS_MESSAGE_DELIVERY_RECEIPTS, "received"))
            try:
                received_elt_ret["id"] = msg_elt["id"]
            except KeyError:
                log.warning(f"missing id for message element: {msg_elt.toXml}")
                return

            msg_result_elt = xmlstream.toResponse(msg_elt, "result")
            msg_result_elt.addChild(received_elt_ret)
            client.send(msg_result_elt)

    def onMessageDeliveryReceiptsReceived(self, msg_elt, client):
        """This method is called on message delivery receipts **received** (XEP-0184 #7)
        @param msg_elt: message element
        @param client: %(doc_client)s"""
        msg_elt.handled = True
        rcv_elt = next(msg_elt.elements(NS_MESSAGE_DELIVERY_RECEIPTS, "received"))
        msg_id = rcv_elt["id"]

        try:
            uid = self._dictRequest[msg_id]
            del self._dictRequest[msg_id]
            self.host.bridge.messageState(
                uid, STATUS_MESSAGE_DELIVERY_RECEIVED, client.profile
            )
            log.debug(
                _("[XEP-0184] Receive acknowledgment for message id {}".format(msg_id))
            )
        except KeyError:
            pass

    def _clearDictRequest(self, msg_id):
        try:
            del self._dictRequest[msg_id]
            log.debug(
                _(
                    "[XEP-0184] Delete waiting acknowledgment for message id {}".format(
                        msg_id
                    )
                )
            )
        except KeyError:
            pass

    def _isActif(self, profile):
        return self.host.memory.getParamA(PARAM_NAME, PARAM_KEY, profile_key=profile)


@implementer(iwokkel.IDisco)
class XEP_0184_handler(XMPPHandler):

    def __init__(self, plugin_parent, profile):
        self.plugin_parent = plugin_parent
        self.host = plugin_parent.host
        self.profile = profile

    def connectionInitialized(self):
        self.xmlstream.addObserver(
            MSG_CHAT_MESSAGE_DELIVERY_RECEIPTS_REQUEST,
            self.plugin_parent.onMessageDeliveryReceiptsRequest,
            client=self.parent,
        )
        self.xmlstream.addObserver(
            MSG_CHAT_MESSAGE_DELIVERY_RECEIPTS_RECEIVED,
            self.plugin_parent.onMessageDeliveryReceiptsReceived,
            client=self.parent,
        )

        self.xmlstream.addObserver(
            MSG_NORMAL_MESSAGE_DELIVERY_RECEIPTS_REQUEST,
            self.plugin_parent.onMessageDeliveryReceiptsRequest,
            client=self.parent,
        )
        self.xmlstream.addObserver(
            MSG_NORMAL_MESSAGE_DELIVERY_RECEIPTS_RECEIVED,
            self.plugin_parent.onMessageDeliveryReceiptsReceived,
            client=self.parent,
        )

    def getDiscoInfo(self, requestor, target, nodeIdentifier=""):
        return [disco.DiscoFeature(NS_MESSAGE_DELIVERY_RECEIPTS)]

    def getDiscoItems(self, requestor, target, nodeIdentifier=""):
        return []