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#!/usr/bin/env python

from twisted.words.protocols import irc
from twisted.internet import reactor, protocol
from twisted.python import log
from twisted.protocols.basic import LineReceiver

import os

from ConfigParser import ConfigParser

import login, ipv6

config = ConfigParser()

def load_config():
	print 'Loading config...'
	config.read([os.path.expanduser('~/.fot')])
	print 'Done!'

load_config()

modules = {}

def load_modules():
	print 'Loading modules...'
	for m in config.options('modules'):
		if config.getboolean('modules', m):
			try:
				if modules.has_key(m):
					reload(modules[m])
				else:
					modules[m] = __import__('modules.' + m, globals(), locals(), ['Module'])
				mod = modules[m]
				mod.config = config
				print '%s by %s' % (mod.info['title'], mod.info['author'])
				del mod
			except:
				print 'Failed to load', m
				raise
		else:
			print 'Not loading', m
	print 'Done!'

load_modules()

bots = []

def refresh_modules():
	print 'Re-applying modules to bots...'
	for bot in bots:
		bot.apply_modules()
	print 'Done!'

class Bot(irc.IRCClient):
	def __init__(self):
		bots.append(self)
		self.modules = {}

	def __repr__(self):
		return '<Bot %s@%s>' % (self.nickname, self.factory.server)

	def apply_modules(self):
		# Call stop() for each module if neccessary (can't rely on __del__ here)
		for m in self.modules.itervalues():
			if hasattr(m, 'stop'):
				m.stop()
		self.modules = {}
		for m in modules.keys():
			if config.has_option(self.factory.server, m) and config.get(self.factory.server, m).strip():
				self.modules[m] = modules[m].Module(self)

	def connectionMade(self):
		self.apply_modules()
		self.nickname = config.get(self.factory.server, 'nickname')
		irc.IRCClient.connectionMade(self)

	def signedOn(self):
		for chan in config.get(self.factory.server, 'channels').split(' '):
			self.join(chan)

	def privmsg(self, nick, channel, msg):
		for m in self.modules.keys():
			if (config.has_option(self.factory.server, m) and channel in config.get(self.factory.server, m)) or (channel == self.nickname and nick.split('!')[0] != self.nickname):
				self.modules[m](nick, channel, msg)

	def kickedFrom(self, channel, kicker, message):
		self.join(channel)

	def connectionLost(self, reason):
		for m in self.modules.itervalues():
			if hasattr(m, 'stop'):
				m.stop()
		self.modules = {}
		irc.IRCClient.connectionLost(self, reason)

	def reconnect(self):
		self.quit('reconnecting')

class BotFactory(protocol.ReconnectingClientFactory):
	protocol = Bot

	def __init__(self, server, nickname):
		self.server = server
		self.nickname = nickname
		self.maxDelay = 120

	def buildProtocol(self, addr):
		self.resetDelay()
		return protocol.ReconnectingClientFactory.buildProtocol(self, addr)

	def startedConnecting(self, connector):
		print 'Connecting to', connector.host

	def clientConnectionFailed(self, connector, reason):
		print 'Connection failed:', reason.getErrorMessage()
		protocol.ReconnectingClientFactory.clientConnectionFailed(self, connector, reason)

	def clientConnectionLost(self, connector, reason):
		print 'Connection lost:', reason.getErrorMessage()
		protocol.ReconnectingClientFactory.clientConnectionLost(self, connector, reason)

def start_server(server):
	if not config.has_option(server,'host') or not config.has_option(server, 'port') \
		or not config.has_option(server, 'channels') or config.has_option(server, 'disabled'):
		return

	channels = []
	server_modules = [(m, config.get(server, m).split()) for m in modules.keys() if config.has_option(server, m)]
	for channel in config.get(server, 'channels').split():
		channel_modules = [x[0] for x in server_modules if channel in x[1]]
		channels.append('%s (%s)' % (channel, ' '.join(channel_modules) if len(channel_modules) else 'No modules'))

	print '%s: %s' % (server, ' '.join(channels) if len(channels) else 'No channels')

	factory = BotFactory(server, config.get(server, 'nickname'))
	if config.has_option(server, 'host6'):
		bind6 = (config.get(server, 'bind6'), 0) if config.has_option(server, 'bind6') else None
		ipv6.connectTCP6(config.get(server, 'host6'), config.getint(server, 'port6'), factory, bindAddress = bind6)
	else:
		reactor.connectTCP(config.get(server, 'host'), config.getint(server, 'port'), factory)

print 'Starting per-network instances...'
for server in (server for server in config.sections() if server.startswith('server/')):
	start_server(server)

loginfactory = login.getManholeFactory(globals(), os.path.expanduser('~/.fot.users'))
reactor.listenTCP(3333, loginfactory)

reactor.run()