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import webkitpy.common.config.irc as config_irc

from webkitpy.common.thread.messagepump import MessagePump, MessagePumpDelegate

from webkitpy.thirdparty.autoinstalled.irc import ircbot

from webkitpy.thirdparty.autoinstalled.irc import irclib

class IRCBotDelegate(object):

    def irc_message_received(self, nick, message):

        raise NotImplementedError, "subclasses must implement"

    def irc_nickname(self):

        raise NotImplementedError, "subclasses must implement"

    def irc_password(self):

        raise NotImplementedError, "subclasses must implement"

class IRCBot(ircbot.SingleServerIRCBot, MessagePumpDelegate):

    # FIXME: We should get this information from a config file.

    def __init__(self,

                 message_queue,

                 delegate):

        self._message_queue = message_queue

        self._delegate = delegate

        ircbot.SingleServerIRCBot.__init__(

            self,

            [(

                config_irc.server,

                config_irc.port,

                self._delegate.irc_password()

            )],

            self._delegate.irc_nickname(),

            self._delegate.irc_nickname())

        self._channel = config_irc.channel

    # ircbot.SingleServerIRCBot methods

    def on_nicknameinuse(self, connection, event):

        connection.nick(connection.get_nickname() + "_")

    def on_welcome(self, connection, event):

        connection.join(self._channel)

        self._message_pump = MessagePump(self, self._message_queue)

    def on_pubmsg(self, connection, event):

        nick = irclib.nm_to_n(event.source())

        request = event.arguments()[0].split(":", 1)

        if len(request) > 1 and irclib.irc_lower(request[0]) == irclib.irc_lower(self.connection.get_nickname()):

            response = self._delegate.irc_message_received(nick, request[1])

            if response:

                connection.privmsg(self._channel, response)

    # MessagePumpDelegate methods

    def schedule(self, interval, callback):

        self.connection.execute_delayed(interval, callback)

    def message_available(self, message):

        self.connection.privmsg(self._channel, message)

    def final_message_delivered(self):

        self.die()