Mercurial > libervia-backend
view sat/plugins/plugin_xep_0422.py @ 3868:37d2c0282304
component AP gateway (pubsub): only emit a `Follow` activity for microblog subscription:
this avoid to emit Follow subscription when an entity wants to subscribe to attachments
or other special nodes.
rel 370
author | Goffi <goffi@goffi.org> |
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date | Thu, 21 Jul 2022 18:05:20 +0200 |
parents | 60724ff3f273 |
children | 524856bd7b19 |
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#!/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 Optional, List, Tuple, Union, NamedTuple from collections import namedtuple from twisted.words.protocols.jabber import xmlstream from twisted.words.xish import domish from wokkel import disco from zope.interface import implementer from sat.core.constants import Const as C from sat.core.i18n import _ from sat.core.log import getLogger from sat.core.core_types import SatXMPPEntity from sat.memory.sqla_mapping import History from sat.tools.common.async_utils import async_lru log = getLogger(__name__) PLUGIN_INFO = { C.PI_NAME: "Message Fastening", C.PI_IMPORT_NAME: "XEP-0422", C.PI_TYPE: "XEP", C.PI_MODES: C.PLUG_MODE_BOTH, C.PI_PROTOCOLS: ["XEP-0359", "XEP-0422"], C.PI_MAIN: "XEP_0422", C.PI_HANDLER: "yes", C.PI_DESCRIPTION: _("""Implementation Message Fastening"""), } NS_FASTEN = "urn:xmpp:fasten:0" class FastenMetadata(NamedTuple): elements: List[domish.Element] id: str history: Optional[History] clear: bool shell: bool class XEP_0422(object): def __init__(self, host): log.info(_("XEP-0422 (Message Fastening) plugin initialization")) self.host = host host.registerNamespace("fasten", NS_FASTEN) def getHandler(self, __): return XEP_0422_handler() def applyToElt( self, message_elt: domish.Element, origin_id: str, clear: Optional[bool] = None, shell: Optional[bool] = None, children: Optional[List[domish.Element]] = None, external: Optional[List[Union[str, Tuple[str, str]]]] = None ) -> domish.Element: """Generate, add and return <apply-to> element @param message_elt: wrapping <message> element @param origin_id: origin ID of the target message @param clear: set to True to remove a fastening @param shell: set to True when using e2ee shell cf. https://xmpp.org/extensions/xep-0422.html#encryption @param children: element to fasten to the target message <apply-to> element is returned, thus children can also easily be added afterwards @param external: <external> element to add cf. https://xmpp.org/extensions/xep-0422.html#external-payloads the list items can either be a str with only the element name, or a tuple which must then be (namespace, name) @return: <apply-to> element, which is already added to the wrapping message_elt """ apply_to_elt = message_elt.addElement((NS_FASTEN, "apply-to")) apply_to_elt["id"] = origin_id if clear is not None: apply_to_elt["clear"] = C.boolConst(clear) if shell is not None: apply_to_elt["shell"] = C.boolConst(shell) if children is not None: for child in children: apply_to_elt.addChild(child) if external is not None: for ext in external: external_elt = apply_to_elt.addElement("external") if isinstance(ext, str): external_elt["name"] = ext else: ns, name = ext external_elt["name"] = name external_elt["element-namespace"] = ns return apply_to_elt @async_lru(maxsize=5) async def getFastenedElts( self, client: SatXMPPEntity, message_elt: domish.Element ) -> Optional[FastenMetadata]: """Get fastened elements if the message contains no <apply-to> element, None is returned """ try: apply_to_elt = next(message_elt.elements(NS_FASTEN, "apply-to")) except StopIteration: return None else: origin_id = apply_to_elt.getAttribute("id") if not origin_id: log.warning( f"Received invalid fastening message: {message_elt.toXml()}" ) return None elements = apply_to_elt.children if not elements: log.warning(f"No element to fasten: {message_elt.toXml()}") return None history = await self.host.memory.storage.get( client, History, History.origin_id, origin_id, (History.messages, History.subjects, History.thread) ) return FastenMetadata( elements, origin_id, history, C.bool(apply_to_elt.getAttribute("clear", C.BOOL_FALSE)), C.bool(apply_to_elt.getAttribute("shell", C.BOOL_FALSE)), ) @implementer(disco.IDisco) class XEP_0422_handler(xmlstream.XMPPHandler): def getDiscoInfo(self, __, target, nodeIdentifier=""): return [disco.DiscoFeature(NS_FASTEN)] def getDiscoItems(self, requestor, target, nodeIdentifier=""): return []