view sat/plugins/plugin_tmp_directory_subscription.py @ 2716:06160b529da6

core (memory/sqlite): changed history constraint /!\ Database schema change /!\ History was using a unique constraint on `profile_id, timestamp, source, dest, source_res, dest_res`, which can cause trouble because several messages send quickly by the same person can have a common timestamp (specially with delayed messages where precision is second), resulting in message loss. The new constraint use `profile_id, stanza_id, source, dest` where `stanza_id` is XEP-0359 stanza_id, so it's unique by definition, and no message should be lost anymore. Because sqlite doesn't support altering table with a constraint change, we have to create new tables and copy old data to new one, which can be pretty long. Sqlite update mechanism with "specifics" has been fixed when several updates are applied (e.g. moving from v5 to v7) and a specific is in the workflow.
author Goffi <goffi@goffi.org>
date Sun, 09 Dec 2018 14:07:26 +0100
parents 56f94936df1e
children ab2696e34d29
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#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SAT plugin for directory subscription
# Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Jérôme Poisson (goffi@goffi.org)
# Copyright (C) 2015, 2016 Adrien Cossa (souliane@mailoo.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 _, D_
from sat.core.constants import Const as C
from sat.core.log import getLogger

log = getLogger(__name__)


PLUGIN_INFO = {
    C.PI_NAME: "Directory subscription plugin",
    C.PI_IMPORT_NAME: "DIRECTORY-SUBSCRIPTION",
    C.PI_TYPE: "TMP",
    C.PI_PROTOCOLS: [],
    C.PI_DEPENDENCIES: ["XEP-0050", "XEP-0055"],
    C.PI_RECOMMENDATIONS: [],
    C.PI_MAIN: "DirectorySubscription",
    C.PI_HANDLER: "no",
    C.PI_DESCRIPTION: _("""Implementation of directory subscription"""),
}


NS_COMMANDS = "http://jabber.org/protocol/commands"
CMD_UPDATE_SUBSCRIBTION = "update"


class DirectorySubscription(object):
    def __init__(self, host):
        log.info(_("Directory subscription plugin initialization"))
        self.host = host
        host.importMenu(
            (D_("Service"), D_("Directory subscription")),
            self.subscribe,
            security_limit=1,
            help_string=D_("User directory subscription"),
        )

    def subscribe(self, raw_data, profile):
        """Request available commands on the jabber search service associated to profile's host.

        @param raw_data (dict): data received from the frontend
        @param profile (unicode): %(doc_profile)s
        @return: a deferred dict{unicode: unicode}
        """
        d = self.host.plugins["XEP-0055"]._getHostServices(profile)

        def got_services(services):
            service_jid = services[0]
            session_id, session_data = self.host.plugins[
                "XEP-0050"
            ].requesting.newSession(profile=profile)
            session_data["jid"] = service_jid
            session_data["node"] = CMD_UPDATE_SUBSCRIBTION
            data = {"session_id": session_id}
            return self.host.plugins["XEP-0050"]._requestingEntity(data, profile)

        return d.addCallback(got_services)