view sat/plugins/plugin_xep_0059.py @ 3372:5d926c7b0d99

plugin app manager: first draft: /!\ new optional dependency: pyyaml this plugin manage the life cycle of external applications. Application handlers register to it. Data needed to launch an application as set in YAML files. Local data types are used to get values directly from SàT: - !sat_conf to retrieve a configuration value - !sat_generate_pwd to generate a password - !sat_param for parameters specified a launch Data can be exposed when an instance is launched, this can be used to specify the port (notably the one used for web), or a generated password.
author Goffi <goffi@goffi.org>
date Mon, 28 Sep 2020 21:10:30 +0200
parents 384283adcce1
children be6d91572633
line wrap: on
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#!/usr/bin/env python3


# SAT plugin for Result Set Management (XEP-0059)
# Copyright (C) 2009-2020 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 response2dict(self, rsm_response, data=None):
        """Return a dict with RSM response

        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 parse
        @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["first"] = rsm_response.first
        if rsm_response.last is not None:
            data["last"] = rsm_response.last
        if rsm_response.index is not None:
            data["index"] = 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 []