#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
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# modification, are permitted provided that the following conditions are met:
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#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
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#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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###

"""
Supports various DCC things.
"""

__revision__ = "$Id$"

import plugins

import socket
import textwrap
import threading

import conf
import utils
import world
import ircmsgs
import ircutils
import privmsgs
import callbacks

class DCC(callbacks.Privmsg):
    def chat(self, irc, msg, args):
        """<text>

        Sends <text> to the user via a DCC CHAT.  Use nested commands to your
        benefit here.
        """
        text = privmsgs.getArgs(args)
        def openChatPort():
            try:
                sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                sock.settimeout(60)
                host = ircutils.hostFromHostmask(irc.prefix)
                if conf.supybot.externalIP():
                    ip = conf.supybot.externalIP()
                else:
                    try:
                        ip = socket.gethostbyname(host)
                    except socket.error, e:
                        s = 'Error trying to determine the external IP ' \
                            'address of this machine via the host %s: %s'
                        self.log.warning(s, host, e)
                        irc.replyError()
                        return
                i = ircutils.dccIP(ip)
                sock.bind((host, 0))
                port = sock.getsockname()[1]
                self.log.info('DCC CHAT port opened at (%s, %s)', host, port)
                sock.listen(1)
                irc.queueMsg(ircmsgs.privmsg(msg.nick,
                                             '\x01DCC CHAT chat %s %s\x01' % \
                                             (i, port)))
                (realSock, addr) = sock.accept()
                self.log.info('DCC CHAT accepted from %s', addr)
                for line in textwrap.wrap(text, 80):
                    realSock.send(line)
                    realSock.send('\n')
            finally:
                self.log.info('Finally closing sock and realSock.')
                sock.close()
                try:
                    realSock.close()
                except UnboundLocalError:
                    pass
        t = threading.Thread(target=openChatPort)
        world.threadsSpawned += 1
        t.setDaemon(True)
        t.start()
                         


Class = DCC

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