view sat/plugins/plugin_xep_0059.py @ 3101:ab7e8ade848a

plugin XEP-0045: added room statuses to metadata: room statuses are now sent with other metadata on bridge signals, and saved in Room instance. They give useful data on the room, for instance they can be used to know if a full jid is used in this room.
author Goffi <goffi@goffi.org>
date Mon, 30 Dec 2019 20:44:02 +0100
parents ab2696e34d29
children 9d0df638c8b4
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-

# SAT plugin for Result Set Management (XEP-0059)
# Copyright (C) 2009-2019 Jérôme Poisson (goffi@goffi.org)
# Copyright (C) 2013-2016 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 _
from sat.core.constants import Const as C
from sat.core.log import getLogger

log = getLogger(__name__)

from wokkel import disco
from wokkel import iwokkel
from wokkel import rsm

from twisted.words.protocols.jabber import xmlstream
from zope.interface import implementer


PLUGIN_INFO = {
    C.PI_NAME: "Result Set Management",
    C.PI_IMPORT_NAME: "XEP-0059",
    C.PI_TYPE: "XEP",
    C.PI_PROTOCOLS: ["XEP-0059"],
    C.PI_MAIN: "XEP_0059",
    C.PI_HANDLER: "yes",
    C.PI_DESCRIPTION: _("""Implementation of Result Set Management"""),
}

RSM_PREFIX = "rsm_"


class XEP_0059(object):
    # XXX: RSM management is done directly in Wokkel.

    def __init__(self, host):
        log.info(_("Result Set Management plugin initialization"))

    def getHandler(self, client):
        return XEP_0059_handler()

    def parseExtra(self, extra):
        """Parse extra dictionnary to retrieve RSM arguments

        @param extra(dict): data for parse
        @return (rsm.RSMRequest, None): request with parsed arguments
            or None if no RSM arguments have been found
        """
        if int(extra.get(RSM_PREFIX + 'max', 0)) < 0:
            raise ValueError(_("rsm_max can't be negative"))

        rsm_args = {}
        for arg in ("max", "after", "before", "index"):
            try:
                argname = "max_" if arg == "max" else arg
                rsm_args[argname] = extra.pop(RSM_PREFIX + arg)
            except KeyError:
                continue

        if rsm_args:
            return rsm.RSMRequest(**rsm_args)
        else:
            return None

    def serialise(self, rsm_response, data=None):
        """Serialise data for RSM

        Key set in data can be:
            - rsm_first: first item id in the page
            - rsm_last: last item id in the page
            - rsm_index: position of the first item in the full set (may be approximate)
            - rsm_count: total number of items in the full set (may be approximage)
        If a value doesn't exists, it's not set.
        All values are set as strings.
        @param rsm_response(rsm.RSMResponse): response to serialise
        @param data(dict, None): dict to update with rsm_* data.
            If None, a new dict is created
        @return (dict): data dict
        """
        if data is None:
            data = {}
        if rsm_response.first is not None:
            data["rsm_first"] = rsm_response.first
        if rsm_response.last is not None:
            data["rsm_last"] = rsm_response.last
        if rsm_response.index is not None:
            data["rsm_index"] = str(rsm_response.index)
        if rsm_response.index is not None:
            data["rsm_index"] = str(rsm_response.index)
        return data


@implementer(iwokkel.IDisco)
class XEP_0059_handler(xmlstream.XMPPHandler):

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

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