Limnoria/plugins/Enforcer.py

#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
#     this list of conditions, and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# POSSIBILITY OF SUCH DAMAGE.
###

"""
Enforcer: Enforces capabilities on a channel, watching MODEs, KICKs,
                 JOINs, etc. to make sure they match the channel's config.
"""

from baseplugin import *

import conf
import ircdb
import ircmsgs
import privmsgs
import ircutils
import callbacks

def configure(onStart, afterConnect, advanced):
    from questions import expect, anything, something, yn
    onStart.append('load Enforcer')
    chanserv = something('What\'s the name of ChanServ on your network?')
    if yn('Do you want the bot to take revenge on rule breakers?') == 'y':
        revenge = True
    else:
        revenge = False
    onStart.append('startenforcer %s %s' % (chanserv, revenge))

###
# Enforcer: Enforces capabilities on JOIN, MODE, KICK, etc.
###
_chanCap = ircdb.makeChannelCapability
class Enforcer(callbacks.Privmsg):
    started = False
    def startenforcer(self, irc, msg, args):
        """[<CHANSERV> <revenge>]

        Starts the Enforcer plugin.  <chanserv> is the nick for the chanserv
        aspect of Services (it defaults to ChanServ).  <revenge> is whether to
        be *really* nasty to people who break the rules (it's often referred
        to in other bots as 'bitch mode.')  It defaults to True.
        """
        self.topics = {}
        (chanserv, revenge) = privmsgs.getArgs(args, needed=0, optional=2)
        self.chanserv = chanserv or 'ChanServ'
        self.started = True
        revenge = revenge.capitalize()
        if revenge == 'True' or revenge == '':
            self.revenge = True
        elif revenge == 'False':
            self.revenge = False
        else:
            irc.error(msg,'Possible values for revenge are "True" and "False"')
            return
        for channel in irc.state.channels:
            irc.queueMsg(ircmsgs.topic(channel))
        irc.reply(msg, conf.replySuccess)
    startenforcer = privmsgs.checkCapability(startenforcer, 'admin')

    def doJoin(self, irc, msg):
        if not self.started:
            return
        channel = msg.args[0]
        c = ircdb.channels.getChannel(channel)
        if c.checkBan(msg.prefix):
            irc.queueMsg(ircmsgs.ban(channel, ircutils.banmask(msg.prefix)))
            irc.queueMsg(ircmsgs.kick(channel, msg.nick))
        elif ircdb.checkCapability(msg.prefix, _chanCap(channel, 'op')):
            irc.queueMsg(ircmsgs.op(channel, msg.nick))
        elif ircdb.checkCapability(msg.prefix, _chanCap(channel, 'halfop')):
            irc.queueMsg(ircmsgs.halfop(channel, msg.nick))
        elif ircdb.checkCapability(msg.prefix, _chanCap(channel, 'voice')):
            irc.queueMsg(ircmsgs.voice(channel, msg.nick))

    def doTopic(self, irc, msg):
        if not self.started:
            return
        channel = msg.args[0]
        topic = msg.args[1]
        if msg.nick != irc.nick and \
           not ircdb.checkCapabilities(msg.prefix,
                                       (_chanCap(channel, 'op'),
                                        _chanCap(channel, 'topic'))):
            irc.queueMsg(ircmsgs.topic(channel, self.topics[channel]))
            if self.revenge:
                irc.queueMsg(ircmsgs.kick(channel, msg.nick,
                                      conf.replyNoCapability % \
                                      _chanCap(channel, 'topic')))
        else:
            self.topics[channel] = msg.args[1]

    def do332(self, irc, msg):
        # This command gets sent right after joining a channel.
        if not self.started:
            return
        (channel, topic) = msg.args[1:]
        self.topics[channel] = topic

    def _isProtected(self, channel, hostmask):
        capabilities = [_chanCap(channel, 'op'),_chanCap(channel, 'protected')]
        return ircdb.checkCapabilities(hostmask, capabilities)

    def _revenge(self, irc, channel, hostmask):
        irc.queueMsg(ircmsgs.ban(channel, ircutils.banmask(hostmask)))
        irc.queueMsg(ircmsgs.kick(channel,ircutils.nickFromHostmask(hostmask)))

    def doKick(self, irc, msg):
        if not self.started:
            return
        channel = msg.args[0]
        kicked = msg.args[1].split(',')
        deop = False
        if msg.nick != irc.nick and\
           not ircdb.checkCapability(msg.prefix, _chanCap(channel, 'op')):
            for nick in kicked:
                hostmask = irc.state.nickToHostmask(nick)
                if nick == irc.nick:
                    # Must be a sendMsg so he joins the channel before MODEing.
                    irc.sendMsg(ircmsgs.join(channel))
                    deop = True
                if self._isProtected(channel, hostmask):
                    deop = True
                    irc.queueMsg(ircmsgs.invite(channel, msg.args[1]))
            if deop:
                deop = False
                if self.revenge:
                    self._revenge(irc, channel, msg.prefix)
                else:
                    irc.queueMsg(ircmsgs.deop(channel, msg.nick))

    def doMode(self, irc, msg):
        if not self.started:
            return
        channel = msg.args[0]
        if not ircutils.isChannel(channel):
            return
        if msg.nick != irc.nick and\
           not ircdb.checkCapability(msg.prefix, _chanCap(channel, 'op')):
            for (mode, value) in ircutils.separateModes(msg.args[1:]):
                if value == msg.nick:
                    continue
                elif mode == '+o' and value != irc.nick:
                    hostmask = irc.state.nickToHostmask(value)
                    if ircdb.checkCapability(channel,
                                           ircdb.makeAntiCapability('op')):
                        irc.queueMsg(ircmsgs.deop(channel, value))
                elif mode == '+h' and value != irc.nick:
                    hostmask = irc.state.nickToHostmask(value)
                    if ircdb.checkCapability(channel,
                                           ircdb.makeAntiCapability('halfop')):
                        irc.queueMsg(ircmsgs.dehalfop(channel, value))
                elif mode == '+v' and value != irc.nick:
                    hostmask = irc.state.nickToHostmask(value)
                    if ircdb.checkCapability(channel,
                                           ircdb.makeAntiCapability('voice')):
                        irc.queueMsg(ircmsgs.devoice(channel, value))
                elif mode == '-o':
                    hostmask = irc.state.nickToHostmask(value)
                    if self._isProtected(channel, hostmask):
                        irc.queueMsg(ircmsgs.op(channel, value))
                        if self.revenge:
                            self._revenge(irc, channel, msg.prefix)
                        else:
                            irc.queueMsg(ircmsgs.deop(channel, msg.nick))
                elif mode == '-h':
                    hostmask = irc.state.nickToHostmask(value)
                    if self._isProtected(channel, hostmask):
                        irc.queueMsg(ircmsgs.halfop(channel, value))
                        if self.revenge:
                            self._revenge(irc, channel, msg.prefix)
                        else:
                            irc.queueMsg(ircmsgs.deop(channel, msg.nick))
                elif mode == '-v':
                    hostmask = irc.state.nickToHostmask(value)
                    if self._isProtected(channel, hostmask):
                        irc.queueMsg(ircmsgs.voice(channel, value))
                        if self.revenge:
                            self._revenge(irc, channel, msg.prefix)
                        else:
                            irc.queueMsg(ircmsgs.deop(channel, msg.nick))
                elif mode == '+b':
                    # To be safe, only #channel.ops are allowed to ban.
                    if not ircdb.checkCapability(msg.prefix,
                                                 _chanCap(channel, 'op')):
                        irc.queueMsg(ircmsgs.unban(channel, value))
                        if self.revenge:
                            self._revenge(irc, channel, msg.prefix)
                        else:
                            irc.queueMsg(ircmsgs.deop(channel, msg.nick))

    def __call__(self, irc, msg):
        if self.started and msg.prefix == self.chanserv:
            return
        else:
            return callbacks.Privmsg.__call__(self, irc, msg)


Class = Enforcer
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