304 lines
12 KiB
Python
304 lines
12 KiB
Python
#!/usr/bin/env python3
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# Copyright (C) 2009-2026 Jérôme Poisson (goffi@goffi.org)
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import time
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import uuid
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from sqlalchemy.orm.attributes import flag_modified
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from twisted.internet import defer
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from twisted.words.protocols.jabber import xmlstream
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from twisted.words.protocols.jabber import jid
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from twisted.words.xish import domish
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from tx_xmpp import disco
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from zope.interface import implementer
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from libervia.backend.core import exceptions
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from libervia.backend.core.constants import Const as C
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from libervia.backend.core.core_types import SatXMPPEntity
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from libervia.backend.core.i18n import _
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from libervia.backend.core.log import getLogger
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from libervia.backend.memory.sqla import History, Message, Subject, joinedload, select
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from libervia.backend.models.core import MessageData, MessageEdition
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from libervia.backend.tools.common import data_format
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from libervia.backend.tools.utils import aio
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log = getLogger(__name__)
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PLUGIN_INFO = {
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C.PI_NAME: "Last Message Correction",
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C.PI_IMPORT_NAME: "XEP-0308",
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C.PI_TYPE: "XEP",
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C.PI_PROTOCOLS: ["XEP-0308"],
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C.PI_DEPENDENCIES: ["XEP-0334"],
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C.PI_MAIN: "XEP_0308",
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C.PI_HANDLER: "yes",
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C.PI_DESCRIPTION: _("""Implementation of XEP-0308 (Last Message Correction)"""),
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}
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NS_MESSAGE_CORRECT = "urn:xmpp:message-correct:0"
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class XEP_0308:
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def __init__(self, host):
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log.info(f"plugin {PLUGIN_INFO[C.PI_NAME]!r} initialization")
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self.host = host
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host.register_namespace("message_correct", NS_MESSAGE_CORRECT)
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host.trigger.add("message_received", self._message_received_trigger)
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host.bridge.add_method(
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"message_edit",
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".plugin",
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in_sign="sss",
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out_sign="",
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method=self._message_edit,
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async_=True,
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)
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self._h = host.plugins["XEP-0334"]
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def get_handler(self, client):
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return XEP_0308_handler()
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@aio
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async def get_last_history(
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self, client: SatXMPPEntity, message_elt: domish.Element
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) -> History | None:
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profile_id = self.host.memory.storage.profiles[client.profile]
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from_jid = jid.JID(message_elt["from"])
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message_type = message_elt.getAttribute("type", C.MESS_TYPE_NORMAL)
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async with self.host.memory.storage.session() as session:
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stmt = (
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select(History)
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.where(
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History.profile_id == profile_id,
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History.source == from_jid.userhost(),
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History.dest == client.jid.userhost(),
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History.type == message_type,
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)
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.options(joinedload(History.messages))
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.options(joinedload(History.subjects))
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.options(joinedload(History.thread))
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)
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if message_elt.type == C.MESS_TYPE_GROUPCHAT:
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stmt = stmt.where(History.source_res == from_jid.resource)
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# we want last message
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stmt = stmt.order_by(History.timestamp.desc()).limit(1)
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result = await session.execute(stmt)
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history = result.unique().scalar_one_or_none()
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return history
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async def update_history(
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self,
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client: SatXMPPEntity,
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edited_history: History,
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edit_timestamp: float,
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new_message: dict[str, str],
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new_subject: dict[str, str],
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new_extra: dict,
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previous_message: dict[str, str],
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previous_subject: dict[str, str],
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previous_extra: dict | None,
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store: bool = True,
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) -> None:
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# FIXME: new_extra is not handled by now
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edited_history.messages = [
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Message(message=mess, language=lang) for lang, mess in new_message.items()
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]
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edited_history.subjects = [
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Subject(subject=mess, language=lang) for lang, mess in new_subject.items()
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]
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previous_version = {
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# this is the timestamp when this version was published
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"timestamp": edited_history.extra.get("updated", edited_history.timestamp),
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"message": previous_message,
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"subject": previous_subject,
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}
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edited_history.extra["updated"] = edit_timestamp
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if previous_extra:
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previous_extra = previous_extra.copy()
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# we must not have editions in each edition
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try:
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del previous_extra[C.MESS_EXTRA_EDITIONS]
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except KeyError:
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pass
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# extra may be important for rich content
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previous_version["extra"] = previous_extra
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if store:
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flag_modified(edited_history, "extra")
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edited_history.extra.setdefault(C.MESS_EXTRA_EDITIONS, []).append(
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previous_version
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)
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await self.host.memory.storage.add(edited_history)
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edit_data = MessageData(edited_history.serialise())
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self.host.bridge.message_update(
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edited_history.uid,
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C.MESS_UPDATE_EDIT,
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data_format.serialise(edit_data),
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client.profile,
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)
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async def _message_received_trigger(
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self,
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client: SatXMPPEntity,
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message_elt: domish.Element,
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post_treat: defer.Deferred,
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) -> bool:
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from_jid = jid.JID(message_elt["from"])
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replace_elt = next(message_elt.elements(NS_MESSAGE_CORRECT, "replace"), None)
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if not replace_elt:
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return True
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try:
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replace_id = replace_elt["id"].strip()
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if not replace_id:
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raise KeyError
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except KeyError:
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log.warning(f"Invalid message correction: {message_elt.toXml()}")
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else:
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edited_history = await self.get_last_history(client, message_elt)
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if edited_history is None:
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log.warning(
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f"No message found from {from_jid.full()}, can't correct "
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f"anything: {message_elt.toXml()}"
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)
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return True
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check_id = edited_history.origin_id or edited_history.extra.get("message_id")
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if check_id != replace_id:
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log.warning(
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"Can't apply correction: it doesn't reference the last one:\n"
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f"{message_elt.toXml()}"
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)
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return True
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# TODO: this only accept same full JID, if we do more than last message
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# correction, we may want to accept different resource for non groupchat
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# messages (in case of reconnection with resource change for instance).
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if edited_history.source_jid != from_jid:
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log.warning(
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"Can't apply correction: correction doesn't come from same author "
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f"{edited_history.source_jid.full()}:\n{message_elt.toXml()}"
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)
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return True
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previous_message_data = edited_history.serialise()
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message_data = await client.messageProt.parse_message(message_elt)
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if not message_data["message"] and not message_data["subject"]:
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log.warning(
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"Message correction doesn't have body nor subject, we can't edit "
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"anything"
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)
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return False
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await self.update_history(
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client,
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edited_history,
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message_data.get("received_timestamp") or message_data["timestamp"],
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message_data["message"],
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message_data["subject"],
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message_data["extra"],
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previous_message_data["message"],
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previous_message_data["subject"],
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previous_message_data.get("extra"),
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)
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return False
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async def message_edit(
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self,
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client: SatXMPPEntity,
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message_id: str,
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edit_data: MessageEdition,
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) -> None:
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"""Edit a message
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The message can only be edited if it's the last one of the discussion.
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@param client: client instance
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@param message_id: UID of the message to edit
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@param edit_data: data to update in the message
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"""
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timestamp = time.time()
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edited_history = await self.host.memory.storage.get(
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client,
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History,
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History.uid,
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message_id,
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joined_loads=[History.messages, History.subjects, History.thread],
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)
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if edited_history is None:
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raise exceptions.NotFound(
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f"message to edit not found in database ({message_id})"
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)
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if edited_history.type == C.MESS_TYPE_GROUPCHAT:
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is_group_chat = True
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# In the case of group chat, our message is sent by ourself with our room JID.
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peer_jid = edited_history.source_jid
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else:
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is_group_chat = False
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peer_jid = jid.JID(edited_history.dest)
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history_data = await self.host.memory.history_get(
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client.jid, peer_jid, limit=1, profile=client.profile
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)
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if not history_data:
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raise exceptions.NotFound(
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"No message found in conversation with {peer_jid.userhost()}"
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)
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last_mess = history_data[0]
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if last_mess[0] != message_id:
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raise ValueError(
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f"{message_id} is not the last message of the discussion, we can't edit "
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"it"
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)
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await self.update_history(
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client,
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edited_history,
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timestamp,
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edit_data.message,
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edit_data.subject,
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edit_data.extra,
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last_mess[4],
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last_mess[5],
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last_mess[-1],
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# message will be updated and signal sent on reception in group chat
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store=not is_group_chat,
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)
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serialised = edited_history.serialise()
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serialised["uid"] = str(uuid.uuid4())
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serialised["from"] = client.jid
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# for group chat, we want to send the correction to the room
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serialised["to"] = peer_jid.userhostJID() if is_group_chat else peer_jid
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message_elt = client.generate_message_xml(serialised)["xml"]
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replace_elt = message_elt.addElement((NS_MESSAGE_CORRECT, "replace"))
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replace_elt["id"] = edited_history.origin_id
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self._h.add_hint_elements(message_elt, [self._h.HINT_STORE])
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client.send(message_elt)
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def _message_edit(self, message_id: str, edit_data_s: str, profile: str) -> None:
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client = self.host.get_client(profile)
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edit_data = MessageEdition.model_validate_json(edit_data_s)
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defer.ensureDeferred(self.message_edit(client, message_id, edit_data))
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@implementer(disco.IDisco)
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class XEP_0308_handler(xmlstream.XMPPHandler):
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def getDiscoInfo(self, __, target, nodeIdentifier=""):
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return [disco.DiscoFeature(NS_MESSAGE_CORRECT)]
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def getDiscoItems(self, requestor, target, nodeIdentifier=""):
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return []
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