view libervia/backend/plugins/plugin_xep_0080.py @ 4242:8acf46ed7f36

frontends: remote control implementation: This is the frontends common part of remote control implementation. It handle the creation of WebRTC session, and management of inputs. For now the reception use freedesktop.org Desktop portal, and works mostly with Wayland based Desktop Environments. rel 436
author Goffi <goffi@goffi.org>
date Sat, 11 May 2024 13:52:43 +0200
parents 4b842c1fb686
children 0d7bb4df2343
line wrap: on
line source

#!/usr/bin/env python3

# Copyright (C) 2009-2022 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 typing import Dict, Any

from twisted.words.xish import domish

from libervia.backend.core.constants import Const as C
from libervia.backend.core.i18n import _
from libervia.backend.core.log import getLogger
from libervia.backend.core import exceptions
from libervia.backend.tools import utils

log = getLogger(__name__)


PLUGIN_INFO = {
    C.PI_NAME: "User Location",
    C.PI_IMPORT_NAME: "XEP-0080",
    C.PI_TYPE: "XEP",
    C.PI_MODES: C.PLUG_MODE_BOTH,
    C.PI_PROTOCOLS: ["XEP-0080"],
    C.PI_MAIN: "XEP_0080",
    C.PI_HANDLER: "no",
    C.PI_DESCRIPTION: _("""Implementation of XEP-0080 (User Location)"""),
}

NS_GEOLOC = "http://jabber.org/protocol/geoloc"
KEYS_TYPES = {
    "accuracy": float,
    "alt": float,
    "altaccuracy": float,
    "area": str,
    "bearing": float,
    "building": str,
    "country": str,
    "countrycode": str,
    "datum": str,
    "description": str,
    "error": float,
    "floor": str,
    "lat": float,
    "locality": str,
    "lon": float,
    "postalcode": str,
    "region": str,
    "room": str,
    "speed": float,
    "street": str,
    "text": str,
    "timestamp": "datetime",
    "tzo": str,
    "uri": str
}


class XEP_0080:

    def __init__(self, host):
        log.info(_("XEP-0080 (User Location) plugin initialization"))
        host.register_namespace("geoloc", NS_GEOLOC)

    def get_geoloc_elt(
        self,
        location_data: Dict[str, Any],
    ) -> domish.Element:
        """Generate the element describing the location

        @param geoloc: metadata description the location
            Keys correspond to ones found at
            https://xmpp.org/extensions/xep-0080.html#format, with following additional
            keys:
                - id (str): Identifier for this location
                - language (str): language of the human readable texts
            All keys are optional.
        @return: ``<geoloc/>`` element
        """
        geoloc_elt = domish.Element((NS_GEOLOC, "geoloc"))
        for key, value in location_data.items():
            try:
                key_type = KEYS_TYPES[key]
            except KeyError:
                if key == "id":
                    # "id" attribute is not specified for XEP-0080's <geoloc/> element,
                    # but it may be used in a parent element (that's the case for events)
                    pass
                elif key == "language":
                    geoloc_elt["xml:lang"] = value
                else:
                    log.warning(f"Unknown location key {key}: {location_data}")
                continue
            if key_type == "datetime":
                content = utils.xmpp_date(value)
            else:
                content = str(value)
            geoloc_elt.addElement(key, content=content)

        return geoloc_elt

    def parse_geoloc_elt(
        self,
        geoloc_elt: domish.Element
    ) -> Dict[str, Any]:
        """Parse <geoloc/> element

        @param geoloc_elt: <geoloc/> element
            a parent element can also be used
        @return: geoloc data. It's a dict whose keys correspond to
            [get_geoloc_elt] parameters
        @raise exceptions.NotFound: no <geoloc/> element has been found
        """

        if geoloc_elt.name != "geoloc":
            try:
                geoloc_elt = next(geoloc_elt.elements(NS_GEOLOC, "geoloc"))
            except StopIteration:
                raise exceptions.NotFound
        data: Dict[str, Any] = {}
        for elt in geoloc_elt.elements():
            if elt.uri != NS_GEOLOC:
                log.warning(f"unmanaged geoloc element: {elt.toXml()}")
                continue
            try:
                data_type = KEYS_TYPES[elt.name]
            except KeyError:
                log.warning(f"unknown geoloc element: {elt.toXml()}")
                continue
            try:
                if data_type == "datetime":
                    data[elt.name] = utils.parse_xmpp_date(str(elt))
                else:
                    data[elt.name] = data_type(str(elt))
            except Exception as e:
                log.warning(f"can't parse element: {elt.toXml()}")
                continue

        return data