Mercurial > libervia-backend
view libervia/backend/plugins/plugin_xep_0465.py @ 4189:04cd749de818
docker (backend-dev-demo): command renaming + add a bookmark to avoid empty chat
author | Goffi <goffi@goffi.org> |
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date | Mon, 11 Dec 2023 00:54:01 +0100 |
parents | 4b842c1fb686 |
children | 0d7bb4df2343 |
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#!/usr/bin/env python3 # Libervia plugin for XEP-0465 # Copyright (C) 2009-2021 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 Optional, List, Dict, Union from twisted.words.protocols.jabber.xmlstream import XMPPHandler from twisted.words.protocols.jabber import jid from twisted.words.protocols.jabber import error from twisted.words.xish import domish from zope.interface import implementer from wokkel import disco, iwokkel 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.core.core_types import SatXMPPEntity from libervia.backend.tools import utils from libervia.backend.tools.common import data_format log = getLogger(__name__) PLUGIN_INFO = { C.PI_NAME: "Pubsub Public Subscriptions", C.PI_IMPORT_NAME: "XEP-0465", C.PI_TYPE: C.PLUG_TYPE_XEP, C.PI_MODES: C.PLUG_MODE_BOTH, C.PI_PROTOCOLS: ["XEP-0465"], C.PI_DEPENDENCIES: ["XEP-0060", "XEP-0376"], C.PI_MAIN: "XEP_0465", C.PI_HANDLER: "yes", C.PI_DESCRIPTION: _("""Pubsub Public Subscriptions implementation"""), } NS_PPS = "urn:xmpp:pps:0" NS_PPS_SUBSCRIPTIONS = "urn:xmpp:pps:subscriptions:0" NS_PPS_SUBSCRIBERS = "urn:xmpp:pps:subscribers:0" SUBSCRIBERS_NODE_PREFIX = f"{NS_PPS_SUBSCRIBERS}/" NOT_IMPLEMENTED_MSG = ( "The service at {service!s} doesn't seem to support Pubsub Public Subscriptions " "(XEP-0465), please request support from your service administrator." ) class XEP_0465: def __init__(self, host): log.info(_("Pubsub Public Subscriptions initialization")) host.register_namespace("pps", NS_PPS) self.host = host host.bridge.add_method( "ps_public_subscriptions_get", ".plugin", in_sign="sss", out_sign="s", method=self._subscriptions, async_=True, ) host.bridge.add_method( "ps_public_subscriptions_get", ".plugin", in_sign="sss", out_sign="s", method=self._subscriptions, async_=True, ) host.bridge.add_method( "ps_public_node_subscriptions_get", ".plugin", in_sign="sss", out_sign="a{ss}", method=self._get_public_node_subscriptions, async_=True, ) def get_handler(self, client): return XEP_0465_Handler() @property def subscriptions_node(self) -> str: return NS_PPS_SUBSCRIPTIONS @property def subscribers_node_prefix(self) -> str: return SUBSCRIBERS_NODE_PREFIX def build_subscription_elt(self, node: str, service: jid.JID) -> domish.Element: """Generate a <subscriptions> element This is the element that a service returns on public subscriptions request """ subscription_elt = domish.Element((NS_PPS, "subscription")) subscription_elt["node"] = node subscription_elt["service"] = service.full() return subscription_elt def build_subscriber_elt(self, subscriber: jid.JID) -> domish.Element: """Generate a <subscriber> element This is the element that a service returns on node public subscriptions request """ subscriber_elt = domish.Element((NS_PPS, "subscriber")) subscriber_elt["jid"] = subscriber.full() return subscriber_elt @utils.ensure_deferred async def _subscriptions( self, service="", nodeIdentifier="", profile_key=C.PROF_KEY_NONE ) -> str: client = self.host.get_client(profile_key) service = None if not service else jid.JID(service) subs = await self.subscriptions(client, service, nodeIdentifier or None) return data_format.serialise(subs) async def subscriptions( self, client: SatXMPPEntity, service: Optional[jid.JID] = None, node: Optional[str] = None ) -> List[Dict[str, Union[str, bool]]]: """Retrieve public subscriptions from a service @param service(jid.JID): PubSub service @param nodeIdentifier(unicode, None): node to filter None to get all subscriptions """ if service is None: service = client.jid.userhostJID() try: items, __ = await self.host.plugins["XEP-0060"].get_items( client, service, NS_PPS_SUBSCRIPTIONS ) except error.StanzaError as e: if e.condition == "forbidden": log.warning(NOT_IMPLEMENTED_MSG.format(service=service)) return [] else: raise e ret = [] for item in items: try: subscription_elt = next(item.elements(NS_PPS, "subscription")) except StopIteration: log.warning(f"no <subscription> element found: {item.toXml()}") continue try: sub_dict = { "service": subscription_elt["service"], "node": subscription_elt["node"], "subscriber": service.full(), "state": subscription_elt.getAttribute("subscription", "subscribed"), } except KeyError: log.warning( f"invalid <subscription> element: {subscription_elt.toXml()}" ) continue if node is not None and sub_dict["node"] != node: # if not is specified, we filter out any other node # FIXME: should node filtering be done by server? continue ret.append(sub_dict) return ret @utils.ensure_deferred async def _get_public_node_subscriptions( self, service: str, node: str, profile_key: str ) -> Dict[str, str]: client = self.host.get_client(profile_key) subs = await self.get_public_node_subscriptions( client, jid.JID(service) if service else None, node ) return {j.full(): a for j, a in subs.items()} def get_public_subscribers_node(self, node: str) -> str: """Return prefixed node to retrieve public subscribers""" return f"{NS_PPS_SUBSCRIBERS}/{node}" async def get_public_node_subscriptions( self, client: SatXMPPEntity, service: Optional[jid.JID], nodeIdentifier: str ) -> Dict[jid.JID, str]: """Retrieve public subscriptions to a node @param nodeIdentifier(unicode): node to get subscriptions from """ if not nodeIdentifier: raise exceptions.DataError("node identifier can't be empty") if service is None: service = client.jid.userhostJID() subscribers_node = self.get_public_subscribers_node(nodeIdentifier) try: items, __ = await self.host.plugins["XEP-0060"].get_items( client, service, subscribers_node ) except error.StanzaError as e: if e.condition == "forbidden": log.warning(NOT_IMPLEMENTED_MSG.format(service=service)) return {} else: raise e ret = {} for item in items: try: subscriber_elt = next(item.elements(NS_PPS, "subscriber")) except StopIteration: log.warning(f"no <subscriber> element found: {item.toXml()}") continue try: ret[jid.JID(subscriber_elt["jid"])] = "subscribed" except (KeyError, RuntimeError): log.warning( f"invalid <subscriber> element: {subscriber_elt.toXml()}" ) continue return ret def set_public_opt(self, options: Optional[dict] = None) -> dict: """Set option to make a subscription public @param options: dict where the option must be set if None, a new dict will be created @return: the options dict """ if options is None: options = {} options[f'{{{NS_PPS}}}public'] = True return options @implementer(iwokkel.IDisco) class XEP_0465_Handler(XMPPHandler): def getDiscoInfo(self, requestor, service, nodeIdentifier=""): return [disco.DiscoFeature(NS_PPS)] def getDiscoItems(self, requestor, service, nodeIdentifier=""): return []