muctab.py 81.2 KB
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"""
Module for the MucTab

A MucTab is a tab for multi-user chats as defined in XEP-0045.

It keeps track of many things such as part/joins, maintains an
user list, and updates private tabs when necessary.
"""

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import asyncio
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import bisect
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import curses
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import logging
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import asyncio
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import os
import random
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import re
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import functools
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from copy import copy
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from datetime import datetime
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from typing import Dict, Callable, List, Optional, Tuple, Union, Set
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from slixmpp import InvalidJID, JID, Presence
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from slixmpp.exceptions import IqError, IqTimeout
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from poezio.tabs import ChatTab, Tab, SHOW_NAME
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from poezio import common
from poezio import fixes
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from poezio import mam
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from poezio import multiuserchat as muc
from poezio import timed_events
from poezio import windows
from poezio import xhtml
from poezio.common import safeJID
from poezio.config import config
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from poezio.core.structs import Command
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from poezio.decorators import refresh_wrapper, command_args_parser
from poezio.logger import logger
from poezio.roster import roster
from poezio.theming import get_theme, dump_tuple
from poezio.user import User
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from poezio.core.structs import Completion, Status
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from poezio.ui.types import BaseMessage, Message, InfoMessage, StatusMessage
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log = logging.getLogger(__name__)

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NS_MUC_USER = 'http://jabber.org/protocol/muc#user'
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STATUS_XPATH = '{%s}x/{%s}status' % (NS_MUC_USER, NS_MUC_USER)
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COMPARE_USERS_LAST_TALKED = lambda x: x.last_talked

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class MucTab(ChatTab):
    """
    The tab containing a multi-user-chat room.
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    It contains a userlist, an input, a topic, an information and a chat zone
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    """
    message_type = 'groupchat'
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    plugin_commands = {}  # type: Dict[str, Command]
    plugin_keys = {}  # type: Dict[str, Callable]
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    additional_information = {}  # type: Dict[str, Callable[[str], str]]
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    lagged = False
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    def __init__(self, core, jid, nick, password=None):
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        ChatTab.__init__(self, core, jid)
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        self.joined = False
        self._state = 'disconnected'
        # our nick in the MUC
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        self.own_nick = nick
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        # self User object
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        self.own_user = None  # type: Optional[User]
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        self.password = password
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        # buffered presences
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        self.presence_buffer = []
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        # userlist
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        self.users = []  # type: List[User]
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        # private conversations
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        self.privates = []  # type: List[Tab]
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        # Used to check if we are still receiving muc history
        self.last_message_was_history = None  # type: Optional[bool]
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        self.topic = ''
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        self.topic_from = ''
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        # Self ping event, so we can cancel it when we leave the room
        self.self_ping_event = None
        # UI stuff
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        self.topic_win = windows.Topic()
        self.text_win = windows.TextWin()
        self._text_buffer.add_window(self.text_win)
        self.v_separator = windows.VerticalSeparator()
        self.user_win = windows.UserList()
        self.info_header = windows.MucInfoWin()
        self.input = windows.MessageInput()
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        # List of ignored users
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        self.ignores = []  # type: List[User]
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        # keys
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        self.register_keys()
        self.update_keys()
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        # commands
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        self.register_commands()
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        self.update_commands()
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        self.resize()
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    @property
    def general_jid(self):
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        return self.jid
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    def check_send_chat_state(self) -> bool:
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        "If we should send a chat state"
        return self.joined

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    @property
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    def last_connection(self) -> Optional[datetime]:
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        last_message = self._text_buffer.last_message
        if last_message:
            return last_message.time
        return None

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    @staticmethod
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    @refresh_wrapper.always
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    def add_information_element(plugin_name: str, callback: Callable[[str], str]) -> None:
        """
        Lets a plugin add its own information to the MucInfoWin
        """
        MucTab.additional_information[plugin_name] = callback

    @staticmethod
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    @refresh_wrapper.always
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    def remove_information_element(plugin_name: str) -> None:
        """
        Lets a plugin add its own information to the MucInfoWin
        """
        del MucTab.additional_information[plugin_name]

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    def cancel_config(self, form):
        """
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        The user do not want to send their config, send an iq cancel
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        """
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        muc.cancel_config(self.core.xmpp, self.jid.bare)
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        self.core.close_tab()

    def send_config(self, form):
        """
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        The user sends their config to the server
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        """
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        muc.configure_room(self.core.xmpp, self.jid.bare, form)
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        self.core.close_tab()

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    def join(self):
        """
        Join the room
        """
        status = self.core.get_status()
        if self.last_connection:
            delta = datetime.now() - self.last_connection
            seconds = delta.seconds + delta.days * 24 * 3600
        else:
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            seconds = None
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        muc.join_groupchat(
            self.core,
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            self.jid.bare,
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            self.own_nick,
            self.password,
            status=status.message,
            show=status.show,
            seconds=seconds)
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        asyncio.ensure_future(mam.on_tab_open(self))
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    def leave_room(self, message: str):
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        if self.joined:
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            theme = get_theme()
            info_col = dump_tuple(theme.COLOR_INFORMATION_TEXT)
            char_quit = theme.CHAR_QUIT
            spec_col = dump_tuple(theme.COLOR_QUIT_CHAR)
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            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
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                color = dump_tuple(theme.COLOR_OWN_NICK)
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            else:
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                color = "3"
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            if message:
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                msg = ('\x19%(color_spec)s}%(spec)s\x19%(info_col)s} '
                       'You (\x19%(color)s}%(nick)s\x19%(info_col)s})'
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                       ' left the room'
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                       ' (\x19o%(reason)s\x19%(info_col)s})') % {
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                           'info_col': info_col,
                           'reason': message,
                           'spec': char_quit,
                           'color': color,
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                           'color_spec': spec_col,
                           'nick': self.own_nick,
                       }
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            else:
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                msg = ('\x19%(color_spec)s}%(spec)s\x19%(info_col)s} '
                       'You (\x19%(color)s}%(nick)s\x19%(info_col)s})'
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                       ' left the room') % {
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                           'info_col': info_col,
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                           'spec': char_quit,
                           'color': color,
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                           'color_spec': spec_col,
                           'nick': self.own_nick,
                       }
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            self.add_message(InfoMessage(msg), typ=2)
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            self.disconnect()
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            muc.leave_groupchat(self.core.xmpp, self.jid.bare, self.own_nick,
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                                message)
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            self.core.disable_private_tabs(self.jid.bare, reason=msg)
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        else:
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            muc.leave_groupchat(self.core.xmpp, self.jid.bare, self.own_nick,
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                                message)
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    def change_affiliation(self,
                           nick_or_jid: Union[str, JID],
                           affiliation: str,
                           reason=''):
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        """
        Change the affiliation of a nick or JID
        """
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        def callback(iq):
            if iq['type'] == 'error':
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                self.core.information(
                    "Could not set affiliation '%s' for '%s'." %
                    (affiliation, nick_or_jid), "Warning")

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        if not self.joined:
            return

        valid_affiliations = ('outcast', 'none', 'member', 'admin', 'owner')
        if affiliation not in valid_affiliations:
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            return self.core.information(
                'The affiliation must be one of ' +
                ', '.join(valid_affiliations), 'Error')
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        if nick_or_jid in [user.nick for user in self.users]:
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            muc.set_user_affiliation(
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                self.core.xmpp,
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                self.jid.bare,
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                affiliation,
                nick=nick_or_jid,
                callback=callback,
                reason=reason)
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        else:
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            muc.set_user_affiliation(
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                self.core.xmpp,
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                self.jid.bare,
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                affiliation,
                jid=safeJID(nick_or_jid),
                callback=callback,
                reason=reason)
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    def change_role(self, nick: str, role: str, reason=''):
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        """
        Change the role of a nick
        """
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        def callback(iq):
            if iq['type'] == 'error':
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                self.core.information(
                    "Could not set role '%s' for '%s'." % (role, nick),
                    "Warning")
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        valid_roles = ('none', 'visitor', 'participant', 'moderator')

        if not self.joined or role not in valid_roles:
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            return self.core.information(
                'The role must be one of ' + ', '.join(valid_roles), 'Error')
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        try:
            target_jid = copy(self.jid)
            target_jid.resource = nick
        except InvalidJID:
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            return self.core.information('Invalid nick', 'Info')
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        muc.set_user_role(
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            self.core.xmpp, self.jid.bare, nick, reason, role, callback=callback)
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    @refresh_wrapper.conditional
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    def print_info(self, nick: str) -> bool:
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        """Print information about a user"""
        user = self.get_user_by_name(nick)
        if not user:
            return False

        theme = get_theme()
        inf = '\x19' + dump_tuple(theme.COLOR_INFORMATION_TEXT) + '}'
        if user.jid:
            user_jid = '%s (\x19%s}%s\x19o%s)' % (
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                inf, dump_tuple(theme.COLOR_MUC_JID), user.jid, inf)
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        else:
            user_jid = ''
        info = ('\x19%(user_col)s}%(nick)s\x19o%(jid)s%(info)s: show: '
                '\x19%(show_col)s}%(show)s\x19o%(info)s, affiliation: '
                '\x19%(role_col)s}%(affiliation)s\x19o%(info)s, role: '
                '\x19%(role_col)s}%(role)s\x19o%(status)s') % {
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                    'user_col': dump_tuple(user.color),
                    'nick': nick,
                    'jid': user_jid,
                    'info': inf,
                    'show_col': dump_tuple(theme.color_show(user.show)),
                    'show': user.show or 'Available',
                    'role_col': dump_tuple(theme.color_role(user.role)),
                    'affiliation': user.affiliation or 'None',
                    'role': user.role or 'None',
                    'status': '\n%s' % user.status if user.status else ''
                }
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        self.add_message(InfoMessage(info), typ=0)
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        return True

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    def change_topic(self, topic: str):
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        """Change the current topic"""
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        muc.change_subject(self.core.xmpp, self.jid.bare, topic)
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    @refresh_wrapper.always
    def show_topic(self):
        """
        Print the current topic
        """
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        theme = get_theme()
        info_text = dump_tuple(theme.COLOR_INFORMATION_TEXT)
        norm_text = dump_tuple(theme.COLOR_NORMAL_TEXT)
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        if self.topic_from:
            user = self.get_user_by_name(self.topic_from)
            if user:
                user_text = dump_tuple(user.color)
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                user_string = '\x19%s}(set by \x19%s}%s\x19%s})' % (
                    info_text, user_text, user.nick, info_text)
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            else:
                user_string = self.topic_from
        else:
            user_string = ''

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        self.add_message(
            InfoMessage(
                "The subject of the room is: \x19%s}%s %s" %
                (norm_text, self.topic, user_string),
            ),
            typ=0,
        )
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    @refresh_wrapper.always
    def recolor(self, random_colors=False):
        """Recolor the current MUC users"""
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        deterministic = config.get_by_tabname('deterministic_nick_colors',
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                                              self.jid.bare)
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        if deterministic:
            for user in self.users:
                if user is self.own_user:
                    continue
                color = self.search_for_color(user.nick)
                if color != '':
                    continue
                user.set_deterministic_color()
            return
        # Sort the user list by last talked, to avoid color conflicts
        # on active participants
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        sorted_users = sorted(self.users, key=COMPARE_USERS_LAST_TALKED, reverse=True)
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        full_sorted_users = sorted_users[:]
        # search our own user, to remove it from the list
        # Also remove users whose color is fixed
        for user in full_sorted_users:
            color = self.search_for_color(user.nick)
            if user is self.own_user:
                sorted_users.remove(user)
            elif color != '':
                sorted_users.remove(user)
                user.change_color(color, deterministic)
        colors = list(get_theme().LIST_COLOR_NICKNAMES)
        if random_colors:
            random.shuffle(colors)
        for i, user in enumerate(sorted_users):
            user.color = colors[i % len(colors)]
        self.text_win.rebuild_everything(self._text_buffer)

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    @refresh_wrapper.conditional
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    def set_nick_color(self, nick: str, color: str) -> bool:
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        "Set a custom color for a nick, permanently"
        user = self.get_user_by_name(nick)
        if color not in xhtml.colors and color not in ('unset', 'random'):
            return False
        if nick == self.own_nick:
            return False
        if color == 'unset':
            if config.remove_and_save(nick, 'muc_colors'):
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                self.core.information('Color for nick %s unset' % (nick),
                                      'Info')
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        else:
            if color == 'random':
                color = random.choice(list(xhtml.colors))
            if user:
                user.change_color(color)
            config.set_and_save(nick, color, 'muc_colors')
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            nick_color_aliases = config.get_by_tabname('nick_color_aliases',
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                                                       self.jid.bare)
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            if nick_color_aliases:
                # if any user in the room has a nick which is an alias of the
                # nick, update its color
                for tab in self.core.get_tabs(MucTab):
                    for u in tab.users:
                        nick_alias = re.sub('^_*', '', u.nick)
                        nick_alias = re.sub('_*$', '', nick_alias)
                        if nick_alias == nick:
                            u.change_color(color)
        self.text_win.rebuild_everything(self._text_buffer)
        return True
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    def on_input(self, key, raw):
        if not raw and key in self.key_func:
            self.key_func[key]()
            return False
        self.input.do_command(key, raw=raw)
        empty_after = self.input.get_text() == ''
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        empty_after = empty_after or (
            self.input.get_text().startswith('/')
            and not self.input.get_text().startswith('//'))
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        self.send_composing_chat_state(empty_after)
        return False
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    def get_nick(self) -> str:
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        if config.get('show_muc_jid'):
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            return self.jid.bare
        bookmark = self.core.bookmarks[self.jid.bare]
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        if bookmark is not None and bookmark.name:
            return bookmark.name
        # TODO: send the disco#info identity name here, if it exists.
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        return self.jid.user
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    def get_text_window(self):
        return self.text_win
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    def on_lose_focus(self):
        if self.joined:
            if self.input.text:
                self.state = 'nonempty'
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            elif self.lagged:
                self.state = 'disconnected'
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            else:
                self.state = 'normal'
        else:
            self.state = 'disconnected'
        self.text_win.remove_line_separator()
        self.text_win.add_line_separator(self._text_buffer)
        if config.get_by_tabname('send_chat_states', self.general_jid):
            self.send_chat_state('inactive')
        self.check_scrolled()

    def on_gain_focus(self):
        self.state = 'current'
        if (self.text_win.built_lines and self.text_win.built_lines[-1] is None
                and not config.get('show_useless_separator')):
            self.text_win.remove_line_separator()
        curses.curs_set(1)
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        if self.joined and config.get_by_tabname(
                'send_chat_states',
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                self.general_jid) and not self.input.get_text():
            self.send_chat_state('active')

    def handle_presence(self, presence):
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        """
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        Handle MUC presence
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        """
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        self.reset_lag()
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        status_codes = set()
        for status_code in presence.xml.findall(STATUS_XPATH):
            status_codes.add(status_code.attrib['code'])
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        if presence['type'] == 'error':
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            self.core.room_error(presence, self.jid.bare)
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        elif not self.joined:
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            own = '110' in status_codes
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            if own or len(self.presence_buffer) >= 10:
                self.process_presence_buffer(presence, own)
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            else:
                self.presence_buffer.append(presence)
                return
        else:
            try:
                self.handle_presence_joined(presence, status_codes)
            except PresenceError:
                self.core.room_error(presence, presence['from'].bare)
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        if self.core.tabs.current_tab is self:
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            self.text_win.refresh()
            self.user_win.refresh_if_changed(self.users)
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            self.info_header.refresh(
                self, self.text_win, user=self.own_user,
                information=MucTab.additional_information)
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            self.input.refresh()
            self.core.doupdate()
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    def process_presence_buffer(self, last_presence, own):
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        """
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        Batch-process all the initial presences
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        """
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        deterministic = config.get_by_tabname('deterministic_nick_colors',
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                                              self.jid.bare)
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        for stanza in self.presence_buffer:
            try:
                self.handle_presence_unjoined(stanza, deterministic)
            except PresenceError:
                self.core.room_error(stanza, stanza['from'].bare)
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        self.presence_buffer = []
        self.handle_presence_unjoined(last_presence, deterministic, own)
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        self.users.sort()
        # Enable the self ping event, to regularly check if we
        # are still in the room.
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        if own:
            self.enable_self_ping_event()
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        if self.core.tabs.current_tab is not self:
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            self.refresh_tab_win()
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            self.core.tabs.current_tab.refresh_input()
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            self.core.doupdate()
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    def handle_presence_unjoined(self, presence: Presence, deterministic, own=False) -> None:
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        """
        Presence received while we are not in the room (before code=110)
        """
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        # If presence is coming from MUC barejid, ignore.
        if not presence['from'].resource:
            return None
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        dissected_presence = dissect_presence(presence)
        from_nick, _, affiliation, show, status, role, jid, typ = dissected_presence
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        if typ == 'unavailable':
            return
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        user_color = self.search_for_color(from_nick)
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        new_user = User(from_nick, affiliation, show, status, role, jid,
                        deterministic, user_color)
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        self.users.append(new_user)
        self.core.events.trigger('muc_join', presence, self)
        if own:
            status_codes = set()
            for status_code in presence.xml.findall(STATUS_XPATH):
                status_codes.add(status_code.attrib['code'])
            self.own_join(from_nick, new_user, status_codes)
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    def own_join(self, from_nick: str, new_user: User, status_codes: Set[str]):
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        """
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        Handle the last presence we received, entering the room
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        """
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        self.own_nick = from_nick
        self.own_user = new_user
        self.joined = True
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        if self.jid.bare in self.core.initial_joins:
            self.core.initial_joins.remove(self.jid.bare)
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            self._state = 'normal'
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        elif self != self.core.tabs.current_tab:
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            self._state = 'joined'
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        if (self.core.tabs.current_tab is self
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                and self.core.status.show not in ('xa', 'away')):
            self.send_chat_state('active')
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        theme = get_theme()
        new_user.color = theme.COLOR_OWN_NICK
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        if config.get_by_tabname('display_user_color_in_join_part',
                                 self.general_jid):
            color = dump_tuple(new_user.color)
        else:
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            color = "3"
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        info_col = dump_tuple(theme.COLOR_INFORMATION_TEXT)
        warn_col = dump_tuple(theme.COLOR_WARNING_TEXT)
        spec_col = dump_tuple(theme.COLOR_JOIN_CHAR)
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        enable_message = ('\x19%(color_spec)s}%(spec)s\x19%(info_col)s} You '
                          '(\x19%(nick_col)s}%(nick)s\x19%(info_col)s}) joined'
                          ' the room') % {
                              'nick': from_nick,
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                              'spec': theme.CHAR_JOIN,
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                              'color_spec': spec_col,
                              'nick_col': color,
                              'info_col': info_col,
                          }
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        self.add_message(InfoMessage(enable_message), typ=2)
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        self.core.enable_private_tabs(self.jid.bare, enable_message)
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        if '201' in status_codes:
            self.add_message(
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                InfoMessage('Info: The room has been created'),
                typ=0
            )
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        if '170' in status_codes:
            self.add_message(
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                InfoMessage(
                    '\x19%(warn_col)s}Warning:\x19%(info_col)s}'
                    ' This room is publicly logged' % {
                        'info_col': info_col,
                        'warn_col': warn_col
                    },
                ),
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                typ=0)
        if '100' in status_codes:
            self.add_message(
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                InfoMessage(
                    '\x19%(warn_col)s}Warning:\x19%(info_col)s}'
                    ' This room is not anonymous.' % {
                        'info_col': info_col,
                        'warn_col': warn_col
                    },
                ),
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                typ=0)
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    def handle_presence_joined(self, presence: Presence, status_codes) -> None:
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        """
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        Handle new presences when we are already in the room
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        """
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        # If presence is coming from MUC barejid, ignore.
        if not presence['from'].resource:
            return None
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        dissected_presence = dissect_presence(presence)
        from_nick, from_room, affiliation, show, status, role, jid, typ = dissected_presence
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        change_nick = '303' in status_codes
        kick = '307' in status_codes and typ == 'unavailable'
        ban = '301' in status_codes and typ == 'unavailable'
        shutdown = '332' in status_codes and typ == 'unavailable'
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        server_initiated = '333' in status_codes and typ == 'unavailable'
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        non_member = '322' in status_codes and typ == 'unavailable'
        user = self.get_user_by_name(from_nick)
        # New user
        if not user and typ != "unavailable":
            user_color = self.search_for_color(from_nick)
            self.core.events.trigger('muc_join', presence, self)
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            self.on_user_join(from_nick, affiliation, show, status, role, jid,
                              user_color)
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        elif user is None:
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            log.error('BUG: User %s in %s is None', from_nick, self.jid.bare)
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            return
        elif change_nick:
            self.core.events.trigger('muc_nickchange', presence, self)
            self.on_user_nick_change(presence, user, from_nick, from_room)
        elif ban:
            self.core.events.trigger('muc_ban', presence, self)
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            self.core.on_user_left_private_conversation(
                from_room, user, status)
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            self.on_user_banned(presence, user, from_nick)
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        elif kick and not server_initiated:
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            self.core.events.trigger('muc_kick', presence, self)
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            self.core.on_user_left_private_conversation(
                from_room, user, status)
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            self.on_user_kicked(presence, user, from_nick)
        elif shutdown:
            self.core.events.trigger('muc_shutdown', presence, self)
            self.on_muc_shutdown()
        elif non_member:
            self.core.events.trigger('muc_shutdown', presence, self)
            self.on_non_member_kicked()
        # user quit
        elif typ == 'unavailable':
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            self.on_user_leave_groupchat(user, jid, status, from_nick,
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                                         from_room, server_initiated)
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        # status change
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        else:
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            self.on_user_change_status(user, from_nick, from_room, affiliation,
                                       role, show, status)
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    def on_non_member_kicked(self):
        """We have been kicked because the MUC is members-only"""
        self.add_message(
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            InfoMessage(
                'You have been kicked because you '
                'are not a member and the room is now members-only.'
            ),
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            typ=2)
        self.disconnect()

    def on_muc_shutdown(self):
        """We have been kicked because the MUC service is shutting down"""
        self.add_message(
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            InfoMessage(
                'You have been kicked because the'
                ' MUC service is shutting down.'
            ),
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            typ=2)
        self.disconnect()

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    def on_user_join(self, from_nick, affiliation, show, status, role, jid,
                     color):
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        """
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        When a new user joins the groupchat
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        """
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        deterministic = config.get_by_tabname('deterministic_nick_colors',
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                                              self.jid.bare)
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        user = User(from_nick, affiliation, show, status, role, jid,
                    deterministic, color)
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        bisect.insort_left(self.users, user)
        hide_exit_join = config.get_by_tabname('hide_exit_join',
                                               self.general_jid)
        if hide_exit_join != 0:
            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
                color = dump_tuple(user.color)
            else:
                color = 3
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            theme = get_theme()
            info_col = dump_tuple(theme.COLOR_INFORMATION_TEXT)
            spec_col = dump_tuple(theme.COLOR_JOIN_CHAR)
            char_join = theme.CHAR_JOIN
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            if not jid.full:
                msg = ('\x19%(color_spec)s}%(spec)s \x19%(color)s}%(nick)s'
                       '\x19%(info_col)s} joined the room') % {
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                           'nick': from_nick,
                           'spec': char_join,
                           'color': color,
                           'info_col': info_col,
                           'color_spec': spec_col,
                       }
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            else:
                msg = ('\x19%(color_spec)s}%(spec)s \x19%(color)s}%(nick)s'
                       '\x19%(info_col)s} (\x19%(jid_color)s}%(jid)s\x19'
                       '%(info_col)s}) joined the room') % {
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                           'spec': char_join,
                           'nick': from_nick,
                           'color': color,
                           'jid': jid.full,
                           'info_col': info_col,
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                           'jid_color': dump_tuple(theme.COLOR_MUC_JID),
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                           'color_spec': spec_col,
                       }
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            self.add_message(InfoMessage(msg), typ=2)
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        self.core.on_user_rejoined_private_conversation(self.jid.bare, from_nick)
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    def on_user_nick_change(self, presence, user, from_nick, from_room):
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        new_nick = presence.xml.find(
            '{%s}x/{%s}item' % (NS_MUC_USER, NS_MUC_USER)).attrib['nick']
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        old_color = user.color
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        if user.nick == self.own_nick:
            self.own_nick = new_nick
            # also change our nick in all private discussions of this room
            self.core.handler.on_muc_own_nickchange(self)
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            user.change_nick(new_nick)
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        else:
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            user.change_nick(new_nick)
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            deterministic = config.get_by_tabname('deterministic_nick_colors',
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                                                  self.jid.bare)
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            color = config.get_by_tabname(new_nick, 'muc_colors') or None
            if color or deterministic:
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                user.change_color(color, deterministic)
        self.users.remove(user)
        bisect.insort_left(self.users, user)
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        if config.get_by_tabname('display_user_color_in_join_part',
                                 self.general_jid):
            color = dump_tuple(user.color)
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            old_color = dump_tuple(old_color)
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        else:
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            old_color = color = 3
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        info_col = dump_tuple(get_theme().COLOR_INFORMATION_TEXT)
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        self.add_message(
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            InfoMessage(
                '\x19%(old_color)s}%(old)s\x19%(info_col)s} is'
                ' now known as \x19%(color)s}%(new)s' % {
                    'old': from_nick,
                    'new': new_nick,
                    'color': color,
                    'old_color': old_color,
                    'info_col': info_col
                },
            ),
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            typ=2)
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        # rename the private tabs if needed
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        self.core.rename_private_tabs(self.jid.bare, from_nick, user)
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    def on_user_banned(self, presence, user, from_nick):
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        """
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        When someone is banned from a muc
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        """
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        self.users.remove(user)
        by = presence.xml.find('{%s}x/{%s}item/{%s}actor' %
                               (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        reason = presence.xml.find('{%s}x/{%s}item/{%s}reason' %
                                   (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        if by:
            by = by.get('jid') or by.get('nick') or None
        else:
            by = None
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        theme = get_theme()
        info_col = dump_tuple(theme.COLOR_INFORMATION_TEXT)
        char_kick = theme.CHAR_KICK
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        if from_nick == self.own_nick:  # we are banned
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            if by:
                kick_msg = ('\x191}%(spec)s \x193}You\x19%(info_col)s}'
                            ' have been banned by \x194}%(by)s') % {
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                                'spec': char_kick,
                                'by': by,
                                'info_col': info_col
                            }
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            else:
                kick_msg = ('\x191}%(spec)s \x193}You\x19'
                            '%(info_col)s} have been banned.') % {
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                                'spec': char_kick,
                                'info_col': info_col
                            }
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            self.core.disable_private_tabs(self.jid.bare, reason=kick_msg)
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            self.disconnect()
            self.refresh_tab_win()
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            self.core.tabs.current_tab.refresh_input()
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            if config.get_by_tabname('autorejoin', self.general_jid):
                delay = config.get_by_tabname('autorejoin_delay',
                                              self.general_jid)
                delay = common.parse_str_to_secs(delay)
                if delay <= 0:
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                    muc.join_groupchat(self.core, self.jid.bare, self.own_nick)
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                else:
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                    self.core.add_timed_event(
                        timed_events.DelayedEvent(delay, muc.join_groupchat,
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                                                  self.core, self.jid.bare,
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                                                  self.own_nick))
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        else:
            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
                color = dump_tuple(user.color)
            else:
                color = 3

            if by:
                kick_msg = ('\x191}%(spec)s \x19%(color)s}'
                            '%(nick)s\x19%(info_col)s} '
                            'has been banned by \x194}%(by)s') % {
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                                'spec': char_kick,
                                'nick': from_nick,
                                'color': color,
                                'by': by,
                                'info_col': info_col
                            }
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            else:
                kick_msg = ('\x191}%(spec)s \x19%(color)s}%(nick)s'
                            '\x19%(info_col)s} has been banned') % {
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                                'spec': char_kick,
                                'nick': from_nick,
                                'color': color,
                                'info_col': info_col
                            }
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        if reason is not None and reason.text:
            kick_msg += ('\x19%(info_col)s} Reason: \x196}'
                         '%(reason)s\x19%(info_col)s}') % {
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                             'reason': reason.text,
                             'info_col': info_col
                         }
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        self.add_message(InfoMessage(kick_msg), typ=2)
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    def on_user_kicked(self, presence, user, from_nick):
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        """
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        When someone is kicked from a muc
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        """
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        self.users.remove(user)
        actor_elem = presence.xml.find('{%s}x/{%s}item/{%s}actor' %
                                       (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        reason = presence.xml.find('{%s}x/{%s}item/{%s}reason' %
                                   (NS_MUC_USER, NS_MUC_USER, NS_MUC_USER))
        by = None
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        theme = get_theme()
        info_col = dump_tuple(theme.COLOR_INFORMATION_TEXT)
        char_kick = theme.CHAR_KICK
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        if actor_elem is not None:
            by = actor_elem.get('nick') or actor_elem.get('jid')
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        if from_nick == self.own_nick:  # we are kicked
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            if by:
                kick_msg = ('\x191}%(spec)s \x193}You\x19'
                            '%(info_col)s} have been kicked'
                            ' by \x193}%(by)s') % {
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                                'spec': char_kick,
                                'by': by,
                                'info_col': info_col
                            }
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            else:
                kick_msg = ('\x191}%(spec)s \x193}You\x19%(info_col)s}'
                            ' have been kicked.') % {
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                                'spec': char_kick,
                                'info_col': info_col
                            }
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            self.core.disable_private_tabs(self.jid.bare, reason=kick_msg)
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            self.disconnect()
            self.refresh_tab_win()
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            self.core.tabs.current_tab.refresh_input()
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            # try to auto-rejoin
            if config.get_by_tabname('autorejoin', self.general_jid):
                delay = config.get_by_tabname('autorejoin_delay',
                                              self.general_jid)
                delay = common.parse_str_to_secs(delay)
                if delay <= 0:
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                    muc.join_groupchat(self.core, self.jid.bare, self.own_nick)
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                else:
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                    self.core.add_timed_event(
                        timed_events.DelayedEvent(delay, muc.join_groupchat,
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                                                  self.core, self.jid.bare,
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                                                  self.own_nick))
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        else:
            if config.get_by_tabname('display_user_color_in_join_part',
                                     self.general_jid):
                color = dump_tuple(user.color)
            else:
                color = 3
            if by:
                kick_msg = ('\x191}%(spec)s \x19%(color)s}%(nick)s'
                            '\x19%(info_col)s} has been kicked by '
                            '\x193}%(by)s') % {
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                                'spec': char_kick,
                                'nick': from_nick,
                                'color': color,
                                'by': by,
                                'info_col': info_col
                            }
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            else:
                kick_msg = ('\x191}%(spec)s \x19%(color)s}%(nick)s'
                            '\x19%(info_col)s} has been kicked') % {
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                                'spec': char_kick,
                                'nick': from_nick,
                                'color': color,
                                'info_col': info_col
                            }
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        if reason is not None and reason.text:
            kick_msg += ('\x19%(info_col)s} Reason: \x196}'
                         '%(reason)s') % {
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                             'reason': reason.text,
                             'info_col': info_col
                         }
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        self.add_message(InfoMessage(kick_msg), typ=2)
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    def on_user_leave_groupchat(self,
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                                user: User,
                                jid: JID,
                                status: str,
                                from_nick: str,
                                from_room: JID,
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                                server_initiated=False):
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        """
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        When a user leaves a groupchat
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        """
        self.users.remove(user)
        if self.own_nick == user.nick:
            # We are now out of the room.
            # Happens with some buggy (? not sure) servers
            self.disconnect()
            self.core.disable_private_tabs(from_room)
            self