###
# Copyright (c) 2002-2004, Jeremiah Fincher
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# modification, are permitted provided that the following conditions are met:
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###

"""
Supports various DCC things.
"""

__revision__ = "$Id$"

import supybot.plugins as plugins

import socket
import textwrap
import threading

import supybot.conf as conf
import supybot.utils as utils
import supybot.world as world
import supybot.ircmsgs as ircmsgs
import supybot.ircutils as ircutils
import supybot.privmsgs as privmsgs
import supybot.callbacks as 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:
                host = ircutils.hostFromHostmask(irc.prefix)
                try:
                    sock = utils.getSocket(host)
                except socket.error, e:
                    s = 'Error connecting to %s: %s'
                    self.log.warning(s, host, e)
                    irc.replyError()
                    return
                sock.settimeout(60)
                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)
                try:
                    sock.bind((host, 0))
                except socket.error, e:
                    irc.error('Unable to initiate DCC CHAT.')
                    return
                port = sock.getsockname()[1]
                self.log.info('DCC CHAT port opened at (%s, %s)', host, port)
                sock.listen(1)
                m = ircmsgs.privmsg(msg.nick,
                                    '\x01DCC CHAT chat %s %s\x01' % (i, port))
                irc.queueMsg(m)
                try:
                    (realSock, addr) = sock.accept()
                except socket.timeout:
                    self.log.info('DCC CHAT timed out.')
                    return
                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.')
                try:
                    sock.close()
                except UnboundLocalError:
                    pass
                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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