libervia-backend/libervia/backend/plugins/plugin_xep_0045.py

#!/usr/bin/env python3


# Libervia implementation of XEP-0045 (Multi-User Chat)
# Copyright (C) 2009-2026 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 collections.abc import Sequence
from dataclasses import dataclass
import difflib
from enum import StrEnum
import re
import time
from typing import TYPE_CHECKING, cast
import uuid

from pydantic import BaseModel, Field
import shortuuid
from twisted.internet import defer
from twisted.python import failure
from twisted.words.protocols.jabber import jid
from twisted.words.protocols.jabber.error import StanzaError
from tx_xmpp import disco, itx_xmpp, mam, muc, rsm
from zope.interface import implementer

from libervia.backend import G
from libervia.backend.core import exceptions
from libervia.backend.core.constants import Const as C
from libervia.backend.core.core_types import SatXMPPEntity
from libervia.backend.core.i18n import D_, _
from libervia.backend.core.log import getLogger
from libervia.backend.memory import memory
from libervia.backend.memory.sqla_mapping import NotificationType
from libervia.backend.models.core import MessageData
from libervia.backend.models.types import JIDType
from libervia.backend.plugins import plugin_misc_jid_search
from libervia.backend.plugins.plugin_xep_0313 import XEP_0313
from libervia.backend.plugins.plugin_xep_0359 import XEP_0359
from libervia.backend.tools import utils
from libervia.backend.tools import xml_tools
from libervia.backend.tools.config import PluginSettings

if TYPE_CHECKING:
    from libervia.backend.core.main import LiberviaBackend

log = getLogger(__name__)

IMPORT_NAME = "XEP-0045"

PLUGIN_INFO = {
    C.PI_NAME: "XEP-0045 Plugin",
    C.PI_IMPORT_NAME: IMPORT_NAME,
    C.PI_TYPE: "XEP",
    C.PI_MODES: C.PLUG_MODE_BOTH,
    C.PI_PROTOCOLS: ["XEP-0045"],
    C.PI_DEPENDENCIES: ["XEP-0359", "JID_SEARCH"],
    C.PI_RECOMMENDATIONS: [C.TEXT_CMDS, "XEP-0313"],
    C.PI_MAIN: "XEP_0045",
    C.PI_HANDLER: "yes",
    C.PI_DESCRIPTION: _("Implementation of Multi-User Chat"),
}

NS_MUC = "http://jabber.org/protocol/muc"
ROOM_USER_JOINED = "ROOM_USER_JOINED"
ROOM_USER_LEFT = "ROOM_USER_LEFT"
OCCUPANT_KEYS = ("nick", "entity", "affiliation", "role")
DEFAULT_HISTORY_SYNC_LIMIT = 50


@dataclass
class MUCClientData:
    _muc_client: "LiberviaMUCClient | None" = None
    muc_service: jid.JID | None = None

    @property
    def muc_client(self) -> "LiberviaMUCClient":
        """Get the MUC client, asserting it exists."""
        assert self._muc_client is not None
        return self._muc_client


class Affiliation(StrEnum):
    OWNER = "owner"
    ADMIN = "admin"
    MEMBER = "member"
    NONE = "none"
    OUTCAST = "outcast"


@dataclass
class OccupantInfo:
    nick: str
    entity: str
    affiliation: str
    role: str


class NotificationExtraMention(BaseModel):
    """Extra data for a MUC mention notification."""

    message_uid: str
    from_jid: JIDType
    to_jid: JIDType
    room_jid: JIDType


class PluginsMucSettings(PluginSettings, plugin_info=PLUGIN_INFO):
    default_muc: str = Field(default="libervia@chat.jabberfr.org")


class AlreadyJoined(exceptions.ConflictError):
    """Raised when attempting to join an already joined room."""

    def __init__(self, room: muc.Room) -> None:
        super().__init__()
        self.room = room


class XEP_0045:
    # TODO: handle invitations

    def __init__(self, host: "LiberviaBackend") -> None:
        log.info(_("Plugin XEP_0045 initialization"))
        self.host = host

        self.settings = G.config.get_settings(PluginsMucSettings)
        self._sessions = memory.Sessions()
        self._jid_search = cast(
            plugin_misc_jid_search.JidSearch, host.plugins["JID_SEARCH"]
        )
        # return same arguments as muc_room_joined + a boolean set to True if the room was
        # already joined (first argument)
        host.bridge.add_method(
            "muc_join",
            ".plugin",
            in_sign="ssa{ss}s",
            out_sign="(bsa{sa{ss}}ssass)",
            method=self._join,
            async_=True,
        )
        host.bridge.add_method(
            "muc_nick", ".plugin", in_sign="sss", out_sign="", method=self._nick
        )
        host.bridge.add_method(
            "muc_nick_get",
            ".plugin",
            in_sign="ss",
            out_sign="s",
            method=self._get_room_nick,
        )
        host.bridge.add_method(
            "muc_leave",
            ".plugin",
            in_sign="ss",
            out_sign="",
            method=self._leave,
            async_=True,
        )
        host.bridge.add_method(
            "muc_occupants_get",
            ".plugin",
            in_sign="ss",
            out_sign="a{sa{ss}}",
            method=self._get_room_occupants,
        )
        host.bridge.add_method(
            "muc_subject", ".plugin", in_sign="sss", out_sign="", method=self._subject
        )
        host.bridge.add_method(
            "muc_get_rooms_joined",
            ".plugin",
            in_sign="s",
            out_sign="a(sa{sa{ss}}ssas)",
            method=self._get_rooms_joined,
        )
        host.bridge.add_method(
            "muc_get_unique_room_name",
            ".plugin",
            in_sign="ss",
            out_sign="s",
            method=self._get_unique_name,
        )
        host.bridge.add_method(
            "muc_configure_room",
            ".plugin",
            in_sign="ss",
            out_sign="s",
            method=self._configure_room,
            async_=True,
        )
        host.bridge.add_method(
            "muc_get_default_service",
            ".plugin",
            in_sign="",
            out_sign="s",
            method=self.get_default_muc,
        )
        host.bridge.add_method(
            "muc_get_service",
            ".plugin",
            in_sign="ss",
            out_sign="s",
            method=self._get_muc_service,
            async_=True,
        )
        # args: room_jid, occupants, user_nick, subject, profile
        host.bridge.add_signal("muc_room_joined", ".plugin", signature="sa{sa{ss}}ssass")
        # args: room_jid, profile
        host.bridge.add_signal("muc_room_left", ".plugin", signature="ss")
        # args: room_jid, old_nick, new_nick, profile
        host.bridge.add_signal("muc_room_user_changed_nick", ".plugin", signature="ssss")
        # args: room_jid, subject, profile
        host.bridge.add_signal("muc_room_new_subject", ".plugin", signature="sss")
        self.__submit_conf_id = host.register_callback(
            self._submit_configuration, with_data=True
        )
        self._room_join_id = host.register_callback(self._ui_room_join_cb, with_data=True)
        host.import_menu(
            (D_("MUC"), D_("configure")),
            self._configure_room_menu,
            security_limit=0,
            help_string=D_("Configure Multi-User Chat room"),
            type_=C.MENU_ROOM,
        )
        try:
            self.text_cmds = self.host.plugins[C.TEXT_CMDS]
        except KeyError:
            log.info(_("Text commands not available"))
        else:
            self.text_cmds.register_text_commands(self)
            self.text_cmds.add_who_is_cb(self._whois, 100)

        self._mam = cast(XEP_0313, self.host.plugins.get("XEP-0313"))
        self._si = cast(XEP_0359, self.host.plugins["XEP-0359"])

        host.trigger.add("presence_available", self.presence_trigger)
        host.trigger.add("presence_received", self.presence_received_trigger)
        host.trigger.add(
            "message_received", self.message_received_trigger, priority=1000000
        )
        host.trigger.add("message_parse", self._message_parse_trigger)
        host.trigger.add(
            "JID_SEARCH_perform_search", self.jid_search_perform_search_trigger
        )

    async def profile_connected(self, client: SatXMPPEntity) -> None:
        """Called when a profile connects."""
        muc_data = client.get_plugin_data(IMPORT_NAME, MUCClientData)
        muc_data.muc_service = await self.get_muc_service(client)

    def _message_parse_trigger(
        self, client: SatXMPPEntity, message_elt, data: dict
    ) -> bool:
        """Add stanza-id from the room if present."""
        # stanza_id will not be filled by parse_message because the emitter
        # is the room and not our server, so we have to parse it here
        if message_elt.getAttribute("type") == C.MESS_TYPE_GROUPCHAT:
            room_jid = data["from"].userhostJID()
            stanza_id = self._si.get_stanza_id(message_elt, room_jid)
            if stanza_id:
                data["extra"]["stanza_id"] = stanza_id
        return True

    def message_received_trigger(
        self, client: SatXMPPEntity, message_elt, post_treat: bool
    ) -> bool:
        """Handle incoming groupchat messages."""
        if message_elt.getAttribute("type") != C.MESS_TYPE_GROUPCHAT:
            return True

        from_jid = jid.JID(message_elt["from"])
        room_jid = from_jid.userhostJID()

        if (
            room_jid
            not in client.get_plugin_data(
                IMPORT_NAME, MUCClientData
            ).muc_client.joined_rooms
        ):
            log.warning(
                "Received groupchat message for unjoined room, ignoring: "
                f"{message_elt.toXml()}"
            )
            return False

        post_treat.addCallback(
            lambda data: defer.ensureDeferred(self._check_mention(data, client, room_jid))
        )
        return True

    async def _check_mention(
        self, data: MessageData, client: SatXMPPEntity, room_jid: jid.JID
    ) -> MessageData:
        from_jid = data["from"]
        room = self.get_room(client, room_jid)
        if from_jid == room.occupantJID:
            return data

        body = data["message"].get("") or next(iter(data["message"].values()), "")
        if not body:
            return data

        if not re.search(rf"(?<!\w){re.escape(room.nick)}(?!\w)", body, re.I):
            return data

        extra = NotificationExtraMention(
            message_uid=data["uid"],
            from_jid=from_jid,
            to_jid=data["to"],
            room_jid=room_jid,
        )
        await self.host.memory.add_notification(
            client,
            NotificationType.chat,
            body[:200],
            title=D_("{nick} ({room})").format(room=room_jid, nick=from_jid.resource),
            extra=extra.model_dump(mode="json"),
        )
        return data

    async def jid_search_perform_search_trigger(
        self,
        client: SatXMPPEntity,
        search_term: str,
        options: plugin_misc_jid_search.Options,
        sequence_matcher: difflib.SequenceMatcher,
        matches: plugin_misc_jid_search.SearchItems,
    ) -> bool:
        """Search MUC rooms if groupchat option is enabled."""
        # FIXME: RSM is not handled, we need proper RSM handling as number of
        #   rooms may be large.
        muc_data = client.get_plugin_data(IMPORT_NAME, MUCClientData)
        if not options.groupchat or muc_data.muc_service is None:
            return True

        disco_items = await self.host.memory.disco.get_items(client, muc_data.muc_service)
        for disco_item in disco_items:
            search_item = plugin_misc_jid_search.RoomSearchItem(
                entity=disco_item.entity, name=disco_item.name or "", local=True
            )
            self._jid_search.process_matching(
                search_term, sequence_matcher, matches, search_item
            )
        return True

    def get_room(self, client: SatXMPPEntity, room_jid: jid.JID) -> muc.Room:
        """Retrieve Room instance from its jid.

        @param client: The client instance.
        @param room_jid: JID of the room.
        @return: The joined room.
        """
        try:
            return client.get_plugin_data(
                IMPORT_NAME, MUCClientData
            ).muc_client.joined_rooms[room_jid]
        except KeyError:
            raise exceptions.NotFound(_("This room has not been joined"))

    def check_room_joined(self, client: SatXMPPEntity, room_jid: jid.JID) -> None:
        """Check that given room has been joined in current session.

        @param client: The client instance.
        @param room_jid: Room JID.
        """
        if (
            room_jid
            not in client.get_plugin_data(
                IMPORT_NAME, MUCClientData
            ).muc_client.joined_rooms
        ):
            raise exceptions.NotFound(_("This room has not been joined"))

    def is_joined_room(self, client: SatXMPPEntity, room_jid: jid.JID) -> bool:
        """Check if a JID is a known and joined room.

        @param client: The client instance.
        @param room_jid: JID of the room.
        @return: True if the room is joined.
        """
        try:
            self.check_room_joined(client, room_jid)
        except exceptions.NotFound:
            return False
        return True

    async def is_room(self, client: SatXMPPEntity, entity_jid: jid.JID) -> bool:
        """Check if a JID is a joined MUC or a known MUC service.

        @param client: The client instance.
        @param entity_jid: JID of the entity to check.
        @return: True if the JID is a joined MUC or a known MUC service.
        """
        try:
            self.check_room_joined(client, entity_jid.userhostJID())
        except exceptions.NotFound:
            # It's not a joined room (yet?), we check disco as fallback.
            try:
                return await self.host.memory.disco.has_identity(
                    client, "conference", "text", entity_jid.userhostJID()
                )
            except Exception:
                log.exception(f"Can't get identity of {entity_jid.full()}")
                return False
        return True

    async def get_bare_or_full(self, client: SatXMPPEntity, peer_jid: jid.JID) -> jid.JID:
        """Use full JID if peer is an occupant of a room, bare JID else.

        @param client: The client instance.
        @param peer_jid: JID of the entity to test.
        @return: Bare or full JID.
        """
        if peer_jid.resource:
            if not await self.is_room(client, peer_jid):
                return peer_jid.userhostJID()
        return peer_jid

    def get_room_user_jid(self, client: SatXMPPEntity, room_jid: jid.JID) -> jid.JID:
        """Get the nick used in the room.

        @param client: The client instance.
        @param room_jid: Room JID (bare, no resource).
        @return: Occupant JID with nick as resource.
        """
        # FIXME: doesn't check if room is anonymous or not
        # TODO: check if room is (semi)anonymous
        if room_jid.resource:
            raise exceptions.InternalError(f"{room_jid} should not have a resource")
        room = self.get_room(client, room_jid)
        return jid.JID(tuple=(room_jid.user, room_jid.host, room.nick))

    def _get_room_joined_bridge_args(
        self, client: SatXMPPEntity, room: muc.Room
    ) -> Sequence[str | dict | list[str]]:
        """Build arguments for muc_room_joined bridge signal.

        @param client: The client instance.
        @param room: The joined room.
        @return: Sequence of arguments for the bridge signal.
        """
        occupants = self.get_room_occupants(client, room.roomJID)
        return [
            room.roomJID.userhost(),
            occupants,
            room.nick,
            # getattr because subject arrives after self-presence (XEP-0045 §7.1)
            getattr(room, "subject", ""),
            [s.name for s in getattr(room, "statuses", [])],
            client.profile,
        ]

    def _ui_room_join_cb(self, data: dict, profile: str) -> dict:
        """Handle UI room join callback.

        @param data: UI data dict.
        @param profile: Profile key.
        @return: Result dict.
        """
        room_jid = jid.JID(data["index"])
        client = self.host.get_client(profile)
        defer.ensureDeferred(self.join(client, room_jid))
        return {}

    def _password_ui_cb(
        self,
        data: dict,
        client: SatXMPPEntity,
        room_jid: jid.JID,
        nick: str,
    ) -> defer.Deferred:
        """Handle password UI callback.

        @param data: UI data dict.
        @param client: The client instance.
        @param room_jid: Room JID.
        @param nick: Nickname.
        @return: Deferred.
        """
        if C.bool(data.get(C.XMLUI_DATA_CANCELLED, "false")):
            log.info("Room join for %s cancelled", room_jid.userhost())
            return defer.fail(
                failure.Failure(exceptions.CancelError("Room joining cancelled"))
            )
        password = data[xml_tools.form_escape("password")]
        return (
            client.get_plugin_data(IMPORT_NAME, MUCClientData)
            .muc_client.join(room_jid, nick, password)
            .addCallbacks(
                lambda room: room,
                lambda f: self._join_eb(f, client, room_jid, nick, password),
            )
        )

    def _show_list_ui(self, items: list, client: SatXMPPEntity, service: jid.JID) -> None:
        """Show room list UI."""
        xmlui = xml_tools.XMLUI(title=f"Rooms in {service.full()}")
        adv_list = xmlui.change_container(
            "advanced_list",
            columns=1,
            selectable="single",
            callback_id=self._room_join_id,
        )
        items = sorted(items, key=lambda i: i.name.lower())
        for item in items:
            adv_list.set_row_index(item.entity.full())
            xmlui.addText(item.name)
        adv_list.end()
        self.host.action_new({"xmlui": xmlui.toXml()}, profile=client.profile)

    def _join_eb(
        self,
        failure_: failure.Failure,
        client: SatXMPPEntity,
        room_jid: jid.JID,
        nick: str,
        password: str | None,
    ) -> defer.Deferred:
        """Handle join errors.

        @param failure_: The failure object.
        @param client: The client instance.
        @param room_jid: Room JID.
        @param nick: Nickname.
        @param password: Password or None.
        @return: Deferred.
        """
        # TODO: error management + signal in bridge
        try:
            condition = failure_.value.condition
        except AttributeError:
            msg_suffix = f": {failure_}"
        else:
            if condition == "conflict":
                # we have a nickname conflict, we try again with "_" suffixed to current nickname
                nick += "_"
                return (
                    client.get_plugin_data(IMPORT_NAME, MUCClientData)
                    .muc_client.join(room_jid, nick, password)
                    .addCallbacks(
                        lambda room: room,
                        lambda f: self._join_eb(f, client, room_jid, nick, password),
                    )
                )
            elif condition == "not-allowed":
                # room is restricted, we need a password
                password_ui = xml_tools.XMLUI(
                    "form",
                    title=f"Room {room_jid.userhost()} is restricted",
                    submit_id="",
                )
                password_ui.addText("This room is restricted, please enter the password")
                password_ui.addPassword("password")
                d = xml_tools.defer_xmlui(self.host, password_ui, profile=client.profile)
                d.addCallback(
                    lambda data: self._password_ui_cb(data, client, room_jid, nick)
                )
                return d

            msg_suffix = f' with condition "{condition}"'

        mess = f"Error while joining room {room_jid.userhost()}{msg_suffix}"
        log.warning(mess)
        xmlui = xml_tools.note(mess, "Group chat error", level=C.XMLUI_DATA_LVL_ERROR)
        self.host.action_new({"xmlui": xmlui.toXml()}, profile=client.profile)
        return defer.fail(failure_)

    def _get_room_occupants(
        self, room_jid_s: str, profile_key: str
    ) -> dict[str, dict[str, str]]:
        """Get room occupants."""
        client = self.host.get_client(profile_key)
        room_jid = jid.JID(room_jid_s)
        return self.get_room_occupants(client, room_jid)

    def get_room_occupants(
        self, client: SatXMPPEntity, room_jid: jid.JID
    ) -> dict[str, dict[str, str]]:
        """Get room occupants as dict suitable for bridge."""
        room = self.get_room(client, room_jid)
        return {
            u.nick: {k: str(getattr(u, k, "")) for k in OCCUPANT_KEYS}
            for u in room.roster.values()
        }

    def _get_rooms_joined(self, profile_key: str = C.PROF_KEY_NONE) -> list[tuple]:
        """Get joined rooms.

        @param profile_key: Profile key.
        @return: List of joined room tuples.
        """
        client = self.host.get_client(profile_key)
        return self.get_rooms_joined(client)

    def get_rooms_joined(self, client: SatXMPPEntity) -> list[tuple]:
        """Return rooms where user is.

        @param client: The client instance.
        @return: List of joined room tuples.
        """
        result = []
        for room in client.get_plugin_data(
            IMPORT_NAME, MUCClientData
        ).muc_client.joined_rooms.values():
            occupants = {
                u.nick: {k: str(getattr(u, k, "")) for k in OCCUPANT_KEYS}
                for u in room.roster.values()
            }
            result.append(
                (
                    room.roomJID.userhost(),
                    occupants,
                    room.nick,
                    # getattr because subject arrives after self-presence (XEP-0045 §7.1)
                    getattr(room, "subject", ""),
                    [s.name for s in getattr(room, "statuses", [])],
                )
            )
        return result

    def _get_room_nick(self, room_jid_s: str, profile_key: str = C.PROF_KEY_NONE) -> str:
        """Get room nick.

        @param room_jid_s: Room JID string.
        @param profile_key: Profile key.
        @return: Room nick string.
        """
        client = self.host.get_client(profile_key)
        return self.get_room_nick(client, jid.JID(room_jid_s))

    def get_room_nick(self, client: SatXMPPEntity, room_jid: jid.JID) -> str:
        """Return nick used in room by user.

        @param client: The client instance.
        @param room_jid: Room JID.
        @return: Nick or empty string in case of error.
        """
        self.check_room_joined(client, room_jid)
        return (
            client.get_plugin_data(IMPORT_NAME, MUCClientData)
            .muc_client.joined_rooms[room_jid]
            .nick
        )

    def _configure_room(
        self, room_jid_s: str, profile_key: str = C.PROF_KEY_NONE
    ) -> defer.Deferred:
        """Configure room.

        @param room_jid_s: Room JID string.
        @param profile_key: Profile key.
        @return: Deferred with XMLUI form string.
        """
        client = self.host.get_client(profile_key)
        d = self.configure_room(client, jid.JID(room_jid_s))
        d.addCallback(lambda xmlui: xmlui.toXml() if xmlui else "")
        return d

    def _configure_room_menu(self, menu_data: dict, profile: str) -> defer.Deferred:
        """Return room configuration form.

        @param menu_data: Menu data dict.
        @param profile: Profile key.
        @return: Deferred with XMLUI form string.
        """
        client = self.host.get_client(profile)
        try:
            room_jid = jid.JID(menu_data["room_jid"])
        except KeyError:
            log.error("room_jid key is not present!")
            return defer.fail(exceptions.DataError())

        def xmlui_received(xmlui: xml_tools.XMLUI | None) -> dict:
            if not xmlui:
                msg = D_("No configuration available for this room")
                return {"xmlui": xml_tools.note(msg).toXml()}
            return {"xmlui": xmlui.toXml()}

        return self.configure_room(client, room_jid).addCallback(xmlui_received)

    def configure_room(self, client: SatXMPPEntity, room_jid: jid.JID) -> defer.Deferred:
        """Return the room configuration form.

        @param client: The client instance.
        @param room_jid: Room JID to configure.
        @return: Deferred firing with configuration form as XMLUI.
        """
        self.check_room_joined(client, room_jid)

        def config_2_xmlui(result) -> xml_tools.XMLUI | None:
            if not result:
                return None
            session_id, session_data = self._sessions.new_session(profile=client.profile)
            session_data["room_jid"] = room_jid
            xmlui = xml_tools.data_form_2_xmlui(result, submit_id=self.__submit_conf_id)
            xmlui.session_id = session_id
            return xmlui

        d = client.get_plugin_data(
            IMPORT_NAME, MUCClientData
        ).muc_client.getConfiguration(room_jid)
        d.addCallback(config_2_xmlui)
        return d

    def _submit_configuration(self, raw_data: dict, profile: str) -> defer.Deferred:
        """Submit room configuration."""
        cancelled = C.bool(raw_data.get("cancelled", C.BOOL_FALSE))
        if cancelled:
            return defer.succeed({})

        client = self.host.get_client(profile)
        try:
            session_data = self._sessions.profile_get(raw_data["session_id"], profile)
        except KeyError:
            log.warning("Session ID doesn't exist, session has probably expired.")
            dialog = xml_tools.XMLUI("popup", title=D_("Room configuration failed"))
            dialog.addText(D_("Session ID doesn't exist, session has probably expired."))
            return defer.succeed({"xmlui": dialog.toXml()})

        data = xml_tools.xmlui_result_2_data_form_result(raw_data)
        d = client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client.configure(
            session_data["room_jid"], data
        )

        def on_success(_) -> dict:
            dialog = xml_tools.XMLUI("popup", title=D_("Room configuration succeed"))
            dialog.addText(D_("The new settings have been saved."))
            return {"xmlui": dialog.toXml()}

        d.addCallback(on_success)
        del self._sessions[raw_data["session_id"]]
        return d

    def is_nick_in_room(
        self, client: SatXMPPEntity, room_jid: jid.JID, nick: str
    ) -> bool:
        """Tell if a nick is currently present in a room."""
        self.check_room_joined(client, room_jid)
        return (
            client.get_plugin_data(IMPORT_NAME, MUCClientData)
            .muc_client.joined_rooms[room_jid]
            .inRoster(muc.User(nick))
        )

    # Text commands

    def _get_muc_service(
        self, jid_: str | None = None, profile: str = C.PROF_KEY_NONE
    ) -> defer.Deferred:
        """Get MUC service JID.

        @param jid_: JID string or None.
        @param profile: Profile key.
        @return: Deferred with MUC service JID string.
        """
        client = self.host.get_client(profile)
        d = defer.ensureDeferred(
            self.get_muc_service(client, jid_.userhostJID() if jid_ else None)
        )
        d.addCallback(
            lambda service_jid: service_jid.full() if service_jid is not None else ""
        )
        return d

    async def get_muc_service(
        self, client: SatXMPPEntity, jid_: jid.JID | None = None
    ) -> jid.JID | None:
        """Return first found MUC service of an entity.

        @param client: The client instance.
        @param jid_: Entity which may have a MUC service, or None for our own server.
        @return: Found service JID or None.
        """
        if jid_ is None:
            try:
                muc_service = client.get_plugin_data(
                    IMPORT_NAME, MUCClientData
                ).muc_service
            except AttributeError:
                pass
            else:
                if muc_service is not None:
                    return muc_service

        services = await self.host.find_service_entities(
            client, "conference", "text", jid_
        )
        for service in services:
            if ".irc." not in service.userhost():
                # FIXME:
                # This ugly hack is here to avoid an issue with openfire: the IRC gateway
                # use "conference/text" identity (instead of "conference/irc")
                return service
        return None

    def _get_unique_name(
        self, muc_service: str = "", profile_key: str = C.PROF_KEY_NONE
    ) -> str:
        """Get unique room name.

        @param muc_service: MUC service JID string.
        @param profile_key: Profile key.
        @return: Unique room name JID string.
        """
        client = self.host.get_client(profile_key)
        return self.get_unique_name(client, muc_service or None).full()

    def get_unique_name(
        self,
        client: SatXMPPEntity,
        muc_service: jid.JID | None = None,
        prefix: str = "",
    ) -> jid.JID:
        """Return unique name for a room, avoiding collision.

        @param client: The client instance.
        @param muc_service: Leave empty to use the default service.
        @param prefix: Optional prefix for room name.
        @return: Unique room bare JID.
        """
        room_name = f"{prefix}{shortuuid.uuid()}"
        if muc_service is None:
            try:
                muc_service = client.get_plugin_data(
                    IMPORT_NAME, MUCClientData
                ).muc_service
            except AttributeError:
                raise exceptions.NotReady(
                    "Main server MUC service has not been checked yet"
                )
            if muc_service is None:
                log.warning("No MUC service found on main server")
                raise exceptions.FeatureNotFound

        return jid.JID(f"{room_name}@{muc_service.userhost()}")

    def get_default_muc(self) -> str:
        """Return the default MUC.

        @return: Default MUC JID string.
        """
        return self.settings.default_muc

    @utils.ensure_deferred
    async def _join(
        self,
        room_jid_s: str,
        nick: str,
        options: dict,
        profile_key: str = C.PROF_KEY_NONE,
    ) -> list[str | dict | list[str] | bool]:
        """Join method used by bridge.

        @param room_jid_s: Room JID string (bare or full).
        @param nick: Nickname to use.
        @param options: Join options dict.
        @param profile_key: Profile identifier.
        @return: Tuple of (already_joined, room_joined_args).
        """
        client = self.host.get_client(profile_key)

        if room_jid_s:
            muc_service = client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_service
            try:
                room_jid = jid.JID(room_jid_s)
            except (RuntimeError, jid.InvalidFormat, AttributeError):
                raise jid.InvalidFormat(
                    _(
                        "Invalid room identifier: {room_id}. "
                        "Use 'room' or 'room@{muc_service}'"
                    ).format(room_id=room_jid_s, muc_service=str(muc_service))
                )
            if not room_jid.user:
                assert muc_service is not None
                room_jid.user, room_jid.host = room_jid.host, str(muc_service)
        else:
            room_jid = self.get_unique_name(client)

        # TODO: error management + signal in bridge
        try:
            room = await self.join(client, room_jid, nick, options or None)
        except AlreadyJoined as e:
            return [True] + list(self._get_room_joined_bridge_args(client, e.room))
        else:
            return [False] + list(self._get_room_joined_bridge_args(client, room))

    async def join(
        self,
        client: SatXMPPEntity,
        room_jid: jid.JID,
        nick: str | None = None,
        options: dict | None = None,
    ) -> muc.Room:
        """Join a MUC room.

        History sync will run in background to join as quick as possible.

        @param client: The client instance.
        @param room_jid: Room JID to join.
        @param nick: Nickname to use (defaults to username).
        @param options: Optional dict with 'password' key.
        @return: The joined room.
        @raise AlreadyJoined: The room is already joined by this profile.
        """
        if not nick:
            nick = client.jid.user
        if options is None:
            options = {}

        muc_data = client.get_plugin_data(IMPORT_NAME, MUCClientData)
        muc_client = muc_data.muc_client

        if room_jid in muc_client.joined_rooms:
            room = muc_client.joined_rooms[room_jid]
            log.info(f"{client.profile} is already in room {room_jid.userhost()}")
            raise AlreadyJoined(room)

        log.info(f"[{client.profile}] joining room {room_jid.userhost()} as {nick}")

        password = options.get("password")

        try:
            room = await muc_client.join(
                room_jid, nick, muc.HistoryOptions(maxStanzas=0), password
            )
        except Exception as e:
            room = await self._join_eb(
                failure.Failure(e), client, room_jid, nick, password
            )
        else:
            if room.locked:
                log.debug("Room locked, configuring it")
                try:
                    await muc_client.configure(room.roomJID, {})
                except Exception as e:
                    log.exception(f"Can't configure MUC room {room_jid}")

        if self._mam is not None:
            # We use `ensureDeferred` to run the archive sync in background
            defer.ensureDeferred(self._sync_mam_history(client, room))

        return room

    async def _sync_mam_history(self, client: SatXMPPEntity, room: muc.Room) -> None:
        """Retrieve MAM history and send messages to bridge progressively.

        @param client: The client instance.
        @param room: The joined room.
        """
        if self._mam is None:
            return

        room_jid = room.roomJID
        total_messages = 0

        self._mam.sync_started(room_jid, client.profile)
        try:
            last_mess = await self.host.memory.history_get(
                room_jid,
                None,
                limit=1,
                between=False,
                filters={"types": C.MESS_TYPE_GROUPCHAT, "last_stanza_id": True},
                profile=client.profile,
            )

            if last_mess:
                stanza_id = last_mess[0][-1].get("stanza_id")
                rsm_req = rsm.RSMRequest(max_=100, after=stanza_id)
            else:
                log.info(
                    "We have no MAM archive for room {room_jid}.".format(
                        room_jid=room_jid
                    )
                )
                stanza_id = None
                rsm_req = rsm.RSMRequest(max_=DEFAULT_HISTORY_SYNC_LIMIT, before="")

            mam_req = mam.MAMRequest(rsm_=rsm_req)

            while True:
                try:
                    mam_data = await self._mam.get_archives(
                        client, mam_req, service=room_jid
                    )
                except StanzaError as e:
                    if last_mess and e.condition == "item-not-found":
                        log.warning(
                            f"Requested item (with stanza_id {stanza_id!r}) can't be "
                            f"found in history of {room_jid}, history has probably been "
                            "purged on server. Falling back to last N items."
                        )
                        # Fall back to retrieving last N items like for a new room
                        rsm_req = rsm.RSMRequest(
                            max_=DEFAULT_HISTORY_SYNC_LIMIT, before=""
                        )
                        mam_req = mam.MAMRequest(rsm_=rsm_req)
                        # Clear last_mess to prevent infinite loop if server keeps failing
                        last_mess = None
                        continue
                    else:
                        raise

                elt_list, rsm_response, mam_response = mam_data

                if not elt_list:
                    break

                for mess_elt in elt_list:
                    try:
                        fwd_message_elt = self._mam.get_message_from_result(
                            client, mess_elt, mam_req, service=room_jid
                        )
                    except exceptions.DataError:
                        log.exception("Invalid element received")
                        continue

                    if to_ := fwd_message_elt.getAttribute("to"):
                        log.warning(
                            f'Forwarded message element has a "to" attribute ({to_!r})'
                            " while it is forbidden by specifications"
                        )
                    fwd_message_elt["to"] = client.jid.full()

                    client.messageProt.onMessage(fwd_message_elt)
                    total_messages += 1

                if mam_response.get("complete", False):
                    break

                if rsm_response and rsm_response.last:
                    # Create new MAMRequest with updated rsm (rsm is a property)
                    rsm_req = rsm.RSMRequest(max_=100, after=rsm_response.last)
                    mam_req = mam.MAMRequest(rsm_=rsm_req)
                else:
                    break

            if total_messages == 0:
                log.info(
                    _("No message received while offline in {room_jid}").format(
                        room_jid=room_jid
                    )
                )
            else:
                log.info(
                    f"Retrieved {total_messages} message(s) from {room_jid} while"
                    " offline.",
                )
            self._mam.sync_completed(room_jid, client.profile, total_messages)

        except Exception as e:
            log.exception(f"MAM history sync failed for {room_jid}")
            self._mam.sync_error(room_jid, client.profile, str(e))
        finally:
            client.messageProt.flush_archive_batch()

    def pop_rooms(self, client: SatXMPPEntity) -> list[tuple]:
        """Remove rooms and return data needed to re-join them.

        This method is to be called before a hot reconnection.

        @param client: The client instance.
        @return: List of tuples (client, room_jid, nick) for re-joining.
        """
        args_list = []
        muc_client = client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client
        for room in list(muc_client.joined_rooms.values()):
            muc_client._removeRoom(room.roomJID)
            args_list.append((client, room.roomJID, room.nick))
        return args_list

    def _nick(
        self, room_jid_s: str, nick: str, profile_key: str = C.PROF_KEY_NONE
    ) -> None:
        """Change nickname."""
        client = self.host.get_client(profile_key)
        self.nick(client, jid.JID(room_jid_s), nick)

    def nick(self, client: SatXMPPEntity, room_jid: jid.JID, nick: str) -> None:
        """Change nickname in a room.

        @param client: The client instance.
        @param room_jid: Room JID.
        @param nick: New nickname.
        """
        self.check_room_joined(client, room_jid)
        client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client.nick(room_jid, nick)

    def _leave(self, room_jid: str, profile_key: str) -> defer.Deferred:
        """Leave room.

        @param room_jid: Room JID string.
        @param profile_key: Profile key.
        @return: Deferred.
        """
        client = self.host.get_client(profile_key)
        return self.leave(client, jid.JID(room_jid))

    def leave(self, client: SatXMPPEntity, room_jid: jid.JID) -> defer.Deferred:
        """Leave a room.

        @param client: The client instance.
        @param room_jid: Room JID.
        @return: Deferred firing when leave is complete.
        """
        self.check_room_joined(client, room_jid)
        return client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client.leave(
            room_jid
        )

    def _subject(self, room_jid_s: str, new_subject: str, profile_key: str) -> None:
        """Set room subject."""
        client = self.host.get_client(profile_key)
        self.subject(client, jid.JID(room_jid_s), new_subject)

    def subject(self, client: SatXMPPEntity, room_jid: jid.JID, subject: str) -> None:
        """Set room subject.

        @param client: The client instance.
        @param room_jid: Room JID.
        @param subject: New subject.
        """
        self.check_room_joined(client, room_jid)
        client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client.subject(
            room_jid, subject
        )

    def get_handler(self, client: SatXMPPEntity) -> "LiberviaMUCClient":
        """Create a MUC client and associate it with profile's session.

        @param client: The client instance.
        @return: The MUC client.
        """
        # create a MUC client and associate it with profile' session
        muc_data = client.get_plugin_data(IMPORT_NAME, MUCClientData)
        muc_client = muc_data._muc_client = LiberviaMUCClient(self)
        return muc_client

    def kick(
        self,
        client: SatXMPPEntity,
        nick: str,
        room_jid: jid.JID,
        options: dict | None = None,
    ) -> defer.Deferred:
        """Kick a participant from the room.

        @param client: The client instance.
        @param nick: Nick of the user to kick.
        @param room_jid: Room JID.
        @param options: Dict with 'reason' key.
        @return: Deferred firing when kick is complete.
        """
        if options is None:
            options = {}
        self.check_room_joined(client, room_jid)
        return client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client.kick(
            room_jid, nick, reason=options.get("reason", None)
        )

    def ban(
        self,
        client: SatXMPPEntity,
        entity_jid: jid.JID,
        room_jid: jid.JID,
        options: dict | None = None,
    ) -> defer.Deferred:
        """Ban an entity from the room.

        @param client: The client instance.
        @param entity_jid: Bare JID of the entity to be banned.
        @param room_jid: Room JID.
        @param options: Dict with 'reason' key.
        @return: Deferred firing when ban is complete.
        """
        self.check_room_joined(client, room_jid)
        if options is None:
            options = {}
        assert not entity_jid.resource
        assert not room_jid.resource
        return client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client.ban(
            room_jid, entity_jid, reason=options.get("reason", None)
        )

    def affiliate(
        self,
        client: SatXMPPEntity,
        entity_jid: jid.JID,
        room_jid: jid.JID,
        options: dict,
    ) -> defer.Deferred:
        """Change the affiliation of an entity.

        @param client: The client instance.
        @param entity_jid: Bare JID of the entity.
        @param room_jid: Room JID.
        @param options: Dict with 'affiliation' key.
        @return:
            Deferred firing when affiliation change is complete.
        """
        self.check_room_joined(client, room_jid)
        assert not entity_jid.resource
        assert not room_jid.resource
        assert "affiliation" in options
        # TODO: handles reason and nick
        return client.get_plugin_data(
            IMPORT_NAME, MUCClientData
        ).muc_client.modifyAffiliationList(room_jid, [entity_jid], options["affiliation"])

    def cmd_nick(self, client: SatXMPPEntity, mess_data: dict) -> bool:
        """Change nickname.

        @command (group): new_nick
            - new_nick: new nick to use
        """
        nick = mess_data["unparsed"].strip()
        if nick:
            room = mess_data["to"]
            self.nick(client, room, nick)
        return False

    def cmd_join(self, client: SatXMPPEntity, mess_data: dict) -> bool:
        """Join a new room.

        @command (all): JID
            - JID: room to join (on the same service if full jid is not specified)
        """
        room_raw = mess_data["unparsed"].strip()
        if not room_raw:
            return False

        if self.is_joined_room(client, mess_data["to"]):
            # we use the same service as the one from the room where the command has
            # been entered if full jid is not entered
            muc_service = mess_data["to"].host
            nick = self.get_room_nick(client, mess_data["to"]) or client.jid.user
        else:
            # the command has been entered in a one2one conversation, so we use
            # our server MUC service as default service
            muc_service = (
                client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_service or ""
            )
            nick = client.jid.user

        room_jid = self.text_cmds.get_room_jid(room_raw, muc_service)
        defer.ensureDeferred(self.join(client, room_jid, nick, {}))
        return False

    def cmd_leave(self, client: SatXMPPEntity, mess_data: dict) -> bool:
        """Quit a room.

        @command (group): [ROOM_JID]
            - ROOM_JID: jid of the room to leave (current room if not specified)
        """
        room_raw = mess_data["unparsed"].strip()
        if room_raw:
            room = self.text_cmds.get_room_jid(room_raw, mess_data["to"].host)
        else:
            room = mess_data["to"]
        self.leave(client, room)
        return False

    def cmd_part(self, client: SatXMPPEntity, mess_data: dict) -> bool:
        """Synonym of /leave."""
        return self.cmd_leave(client, mess_data)

    def cmd_kick(self, client: SatXMPPEntity, mess_data: dict) -> bool | defer.Deferred:
        """Kick a room member.

        @command (group): ROOM_NICK [reason]
            - ROOM_NICK: the nick of the person to kick
            - reason: reason for the kick
        """
        options = mess_data["unparsed"].strip().split()
        try:
            nick = options[0]
            assert self.is_nick_in_room(client, mess_data["to"], nick)
        except (IndexError, AssertionError):
            feedback = _("You must provide a member's nick to kick.")
            self.text_cmds.feed_back(client, feedback, mess_data)
            return False

        reason = " ".join(options[1:]) if len(options) > 1 else None
        d = self.kick(client, nick, mess_data["to"], {"reason": reason})

        def cb(_) -> bool:
            feedback_msg = _("You have kicked {}").format(nick)
            if reason is not None:
                feedback_msg += _(" for the following reason: {reason}").format(
                    reason=reason
                )
            self.text_cmds.feed_back(client, feedback_msg, mess_data)
            return True

        d.addCallback(cb)
        return d

    def cmd_ban(self, client: SatXMPPEntity, mess_data: dict) -> bool | defer.Deferred:
        """Ban an entity from the room.

        @command (group): (JID) [reason]
            - JID: the JID of the entity to ban
            - reason: the reason why this entity is being banned
        """
        options = mess_data["unparsed"].strip().split()
        try:
            jid_s = options[0]
            entity_jid = jid.JID(jid_s).userhostJID()
            assert entity_jid.user
            assert entity_jid.host
        except (
            RuntimeError,
            jid.InvalidFormat,
            AttributeError,
            IndexError,
            AssertionError,
        ):
            feedback = _(
                "You must provide a valid JID to ban, like in '/ban contact@example.net'"
            )
            self.text_cmds.feed_back(client, feedback, mess_data)
            return False

        reason = " ".join(options[1:]) if len(options) > 1 else None
        d = self.ban(client, entity_jid, mess_data["to"], {"reason": reason})

        def cb(_) -> bool:
            feedback_msg = _("You have banned {}").format(entity_jid)
            if reason is not None:
                feedback_msg += _(" for the following reason: {reason}").format(
                    reason=reason
                )
            self.text_cmds.feed_back(client, feedback_msg, mess_data)
            return True

        d.addCallback(cb)
        return d

    def cmd_affiliate(
        self, client: SatXMPPEntity, mess_data: dict
    ) -> bool | defer.Deferred:
        """Affiliate an entity to the room.

        @command (group): (JID) [owner|admin|member|none|outcast]
            - JID: the JID of the entity to affiliate
            - owner: grant owner privileges
            - admin: grant admin privileges
            - member: grant member privileges
            - none: reset entity privileges
            - outcast: ban entity
        """
        options = mess_data["unparsed"].strip().split()
        try:
            jid_s = options[0]
            entity_jid = jid.JID(jid_s).userhostJID()
            assert entity_jid.user
            assert entity_jid.host
        except (
            RuntimeError,
            jid.InvalidFormat,
            AttributeError,
            IndexError,
            AssertionError,
        ):
            feedback = _(
                "You must provide a valid JID to affiliate, like in '/affiliate"
                " contact@example.net member'"
            )
            self.text_cmds.feed_back(client, feedback, mess_data)
            return False

        affiliation = options[1] if len(options) > 1 else "none"
        if affiliation not in Affiliation:
            feedback = _("You must provide a valid affiliation: {}").format(
                " ".join(a.value for a in Affiliation)
            )
            self.text_cmds.feed_back(client, feedback, mess_data)
            return False

        d = self.affiliate(
            client, entity_jid, mess_data["to"], {"affiliation": affiliation}
        )

        def cb(_) -> bool:
            feedback_msg = _("New affiliation for {entity}: {affiliation}").format(
                entity=entity_jid, affiliation=affiliation
            )
            self.text_cmds.feed_back(client, feedback_msg, mess_data)
            return True

        d.addCallback(cb)
        return d

    def cmd_title(self, client: SatXMPPEntity, mess_data: dict) -> bool:
        """Change room's subject.

        @command (group): title
            - title: new room subject
        """
        subject = mess_data["unparsed"].strip()
        if subject:
            room = mess_data["to"]
            self.subject(client, room, subject)
        return False

    def cmd_topic(self, client: SatXMPPEntity, mess_data: dict) -> bool:
        """Synonym of /title."""
        return self.cmd_title(client, mess_data)

    def cmd_list(self, client: SatXMPPEntity, mess_data: dict) -> bool | defer.Deferred:
        """List available rooms in a MUC server.

        @command (all): [MUC_SERVICE]
            - MUC_SERVICE: service to request
               empty value will request room's service for a room,
               or user's server default MUC service in a one2one chat
        """
        unparsed = mess_data["unparsed"].strip()
        try:
            service = jid.JID(unparsed)
        except RuntimeError:
            muc_data = client.get_plugin_data(IMPORT_NAME, MUCClientData)
            if mess_data["type"] == C.MESS_TYPE_GROUPCHAT:
                room_jid = mess_data["to"]
                service = jid.JID(room_jid.host)
            elif muc_data.muc_service is not None:
                service = muc_data.muc_service
            else:
                msg = D_("No known default MUC service")
                self.text_cmds.feed_back(client, msg, mess_data)
                return False
        except jid.InvalidFormat:
            msg = D_("{} is not a valid JID!").format(unparsed)
            self.text_cmds.feed_back(client, msg, mess_data)
            return False

        d = self.host.getDiscoItems(client, service)
        d.addCallback(self._show_list_ui, client, service)
        return d

    def _whois(
        self,
        client: SatXMPPEntity,
        whois_msg: list,
        mess_data: dict,
        target_jid: jid.JID,
    ) -> None:
        """Add MUC user information to whois."""
        if mess_data["type"] != "groupchat":
            return
        if (
            target_jid.userhostJID()
            not in client.get_plugin_data(
                IMPORT_NAME, MUCClientData
            ).muc_client.joined_rooms
        ):
            log.warning("This room has not been joined")
            return
        if not target_jid.resource:
            return

        muc_data = client.get_plugin_data(IMPORT_NAME, MUCClientData)
        user = muc_data.muc_client.joined_rooms[target_jid.userhostJID()].getUser(
            target_jid.resource
        )
        whois_msg.append(_("Nickname: {}").format(user.nick))
        if user.entity:
            whois_msg.append(_("Entity: {}").format(user.entity))
        if user.affiliation != "none":
            whois_msg.append(_("Affiliation: {}").format(user.affiliation))
        if user.role != "none":
            whois_msg.append(_("Role: {}").format(user.role))
        if user.status:
            whois_msg.append(_("Status: {}").format(user.status))
        if user.show:
            whois_msg.append(_("Show: {}").format(user.show))

    def presence_trigger(self, presence_elt, client: SatXMPPEntity) -> bool:
        """Broadcast presence to all joined rooms."""
        # FIXME: should we add a privacy parameters in settings to activate before
        #        broadcasting the presence to all MUC rooms ?
        muc_client = client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client
        for room_jid, room in muc_client.joined_rooms.items():
            elt = xml_tools.element_copy(presence_elt)
            elt["to"] = room_jid.userhost() + "/" + room.nick
            client.presence.send(elt)
        return True

    def presence_received_trigger(
        self,
        client: SatXMPPEntity,
        entity: jid.JID,
        show: str,
        priority: int,
        statuses: dict,
    ) -> bool:
        """Handle presence received trigger."""
        # presence is already handled in (un)availableReceived
        entity_bare = entity.userhostJID()
        muc_client = client.get_plugin_data(IMPORT_NAME, MUCClientData).muc_client
        if entity_bare in muc_client.joined_rooms:
            return False
        return True


@implementer(itx_xmpp.IDisco)
class LiberviaMUCClient(muc.MUCClient):

    ## presence/roster ##

    def __init__(self, plugin_parent: XEP_0045) -> None:
        self.plugin_parent = plugin_parent
        super().__init__()

    @property
    def joined_rooms(self) -> dict:
        """Get joined rooms."""
        return self._rooms

    @property
    def host(self) -> "LiberviaBackend":
        """Get host."""
        return self.plugin_parent.host

    @property
    def client(self) -> SatXMPPEntity:
        """Get client."""
        assert self.parent is not None
        return self.parent

    def availableReceived(self, presence) -> None:
        """Handle available presence."""
        room, __ = self._getRoomUser(presence)

        if room is None:
            return

        # we want to keep statuses with room so they can be sent to the frontend via the
        # muc_room_joined bridge signal
        # XXX: after the first <presence/> received, subsequent broadcasts won't include
        #      status codes like 110 (SELF_PRESENCE) or 100 (REALJID_PUBLIC), so we only
        #      keep the statuses from the initial presence (identified by SELF_PRESENCE);
        #      thus we check if the attribute already exists.
        if (
            not hasattr(room, "statuses")
            and muc.STATUS_CODE.SELF_PRESENCE in presence.mucStatuses
        ):
            room.statuses = presence.mucStatuses

        super().availableReceived(presence)

    def unavailableReceived(self, presence) -> None:
        """Handle unavailable presence."""
        # XXX: we override this method to manage nickname change
        room, user = self._getRoomUser(presence)

        if room is None or user is None:
            return

        room.removeUser(user)

        if muc.STATUS_CODE.NEW_NICK in presence.mucStatuses:
            self.user_changed_nick(room, user, presence.nick)
        else:
            # we left the room
            self.userLeftRoom(room, user)

    def userJoinedRoom(self, room: muc.Room, user: muc.User) -> None:
        """Handle user joined room event."""
        if user.nick == room.nick:
            # we have received our own nick, this mean that the full room roster was
            # received
            log.debug(
                "room {room} joined with nick {nick}",
                room=room.occupantJID.userhost(),
                nick=user.nick,
            )
            args = self.plugin_parent._get_room_joined_bridge_args(self.client, room)
            self.plugin_parent.host.bridge.muc_room_joined(*args)

            # we set type so we don't have to use a deferred with disco to check entity
            # type
            self.host.memory.update_entity_data(
                self.client, room.roomJID, C.ENTITY_TYPE, C.ENTITY_TYPE_MUC
            )
            return

        log.debug(
            "user {nick} has joined room {room_id}",
            nick=user.nick,
            room_id=room.occupantJID.userhost(),
        )
        if not self.host.trigger.point(
            "MUC user joined", room, user, self.client.profile
        ):
            return

        extra = {
            "info_type": ROOM_USER_JOINED,
            "user_affiliation": user.affiliation,
            "user_role": user.role,
            "user_nick": user.nick,
        }
        if user.entity is not None:
            extra["user_entity"] = user.entity.full()

        mess_data = {
            "from": room.roomJID,
            "to": self.client.jid,
            "uid": str(uuid.uuid4()),
            "message": {"": _("=> {} has joined the room").format(user.nick)},
            "subject": {},
            "type": C.MESS_TYPE_INFO,
            "extra": extra,
            "timestamp": time.time(),
        }
        self.client.message_send_to_bridge(mess_data)

    def userLeftRoom(self, room: muc.Room, user: muc.User) -> None:
        """Handle user left room event."""
        if not self.host.trigger.point("MUC user left", room, user, self.client.profile):
            return

        if user.nick == room.nick:
            room_jid_s = room.roomJID.userhost()
            log.info(
                "Room ({room}) left ({profile})",
                room=room_jid_s,
                profile=self.client.profile,
            )
            self.host.memory.del_entity_cache(
                room.roomJID, profile_key=self.client.profile
            )
            self.host.bridge.muc_room_left(room_jid_s, self.client.profile)
            return

        log.debug(
            "user {nick} left room {room_id}",
            nick=user.nick,
            room_id=room.occupantJID.userhost(),
        )

        extra = {
            "info_type": ROOM_USER_LEFT,
            "user_affiliation": user.affiliation,
            "user_role": user.role,
            "user_nick": user.nick,
        }
        if user.entity is not None:
            extra["user_entity"] = user.entity.full()

        mess_data = {
            "from": room.roomJID,
            "to": self.client.jid,
            "uid": str(uuid.uuid4()),
            "message": {"": _("<= {} has left the room").format(user.nick)},
            "subject": {},
            "type": C.MESS_TYPE_INFO,
            "extra": extra,
            "timestamp": time.time(),
        }
        self.client.message_send_to_bridge(mess_data)

    def user_changed_nick(self, room: muc.Room, user: muc.User, new_nick: str) -> None:
        """Handle user nick change."""
        self.host.bridge.muc_room_user_changed_nick(
            room.roomJID.userhost(), user.nick, new_nick, self.client.profile
        )

    def userUpdatedStatus(
        self, room: muc.Room, user: muc.User, show: str, status: str
    ) -> None:
        """Handle user status update."""
        entity = jid.JID(tuple=(room.roomJID.user, room.roomJID.host, user.nick))
        statuses = {C.PRESENCE_STATUSES_DEFAULT: status or ""}
        self.host.bridge.presence_update(
            entity.full(), show or "", 0, statuses, self.client.profile
        )

    def receivedSubject(
        self, room: muc.Room, user: muc.User | None, subject: str
    ) -> None:
        """Handle room subject."""
        # We override this method to fix subject handling (empty strings were discarded)
        # FIXME: remove this once fixed upstream
        room.subject = subject

        if user is not None and user.nick == room.nick:
            return

        log.debug(
            "New subject for room ({room_id}): {subject}",
            room_id=room.occupantJID.full(),
            subject=subject,
        )
        # the subject has been changed
        self.host.bridge.muc_room_new_subject(
            room.roomJID.userhost(), subject, self.client.profile
        )

    ## disco ##

    def getDiscoInfo(self, requestor, target: jid.JID, nodeIdentifier: str = "") -> list:
        """Get disco info."""
        return [disco.DiscoFeature(NS_MUC)]

    def getDiscoItems(self, requestor, target: jid.JID, nodeIdentifier: str = "") -> list:
        """Get disco items."""
        # TODO: manage room queries ? Bad for privacy, must be disabled by default
        #       see XEP-0045 § 6.7
        return []