#!/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
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###

"""
Filters bad words on outgoing messages from the bot, so the bot can't be made
to say bad words.
"""

__revision__ = "$Id$"

import plugins

import re
import sets

import conf
import utils
import ircdb
import ircmsgs
import privmsgs
import callbacks

def configure(onStart, afterConnect, advanced):
    from questions import expect, anything, something, yn
    onStart.append('load BadWords')
    while yn('Would you like to add some bad words?') == 'y':
        words = anything('What words? (separate individual words by spaces)')
        onStart.append('badwords add %s' % words)

nastyChars = '!@#$' * 256
def subber(m):
    return nastyChars[:len(m.group(1))]

class BadWords(privmsgs.CapabilityCheckingPrivmsg):
    priority = 1
    capability = 'admin'
    def __init__(self):
        privmsgs.CapabilityCheckingPrivmsg.__init__(self)
        self._badwords = sets.Set()

    def outFilter(self, irc, msg):
        if hasattr(self, 'regexp') and msg.command == 'PRIVMSG':
            s = msg.args[1]
            s = self.regexp.sub(subber, s)
            return ircmsgs.privmsg(msg.args[0], s)
        else:
            return msg

    def makeRegexp(self):
        self.regexp = re.compile(r'\b('+'|'.join(self._badwords)+r')\b', re.I)

    def add(self, irc, msg, args):
        """<word> [<word> ...]

        Adds all <word>s to the list of words the bot isn't to say.
        """
        words = privmsgs.getArgs(args).split()
        for word in words:
            self._badwords.add(word)
        self.makeRegexp()
        irc.reply(msg, conf.replySuccess)

    def remove(self, irc, msg, args):
        """<word> [<word> ...]

        Removes all <word>s from the list of words the bot isn't to say.
        """
        words = privmsgs.getArgs(args).split()
        for word in words:
            self._badwords.discard(word)
        self.makeRegexp()
        irc.reply(msg, conf.replySuccess)


Class = BadWords


# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: