locationbot/locationbot.py

#!/usr/bin/env python
# Location Bot
#
# Douglas Thrift
#
# locationbot.py

from ConfigParser import NoOptionError, SafeConfigParser
from datetime import datetime, timedelta
import getpass
import ircbot
import irclib
import oauth2 as oauth
import os
import psycopg2
import psycopg2.extensions
import pytz
import re
import socket
import sys
import time
import threading
import traceback
import urllib, urllib2
import urlparse
import warnings
import math

try:
	import simplejson as json
except ImportError:
	import json

class LocationBot(ircbot.SingleServerIRCBot):
	def __init__(self, bot = None):
		self.__config = SafeConfigParser({'min_update_distance': "60"})

		self.__config.read('locationbot.ini')

		try:
			nick = self.__config.sections()[0]
		except IndexError:
			sys.exit('No nick configured')

		servers = []

		try:
			for server in self.__config.get(nick, 'servers').split():
				server = server.split(':', 2)

				if len(server) == 1:
					servers.append((server[0], 6667))
				else:
					host = server[0]
					port = int(server[1])
					ssl = server[1].startswith('+')

					if len(server) == 3:
						servers.append((host, port, ssl, server[2]))
					else:
						servers.append((host, port, ssl))

			self.__admins = self.__config.get(nick, 'admins').split()
			self.__channels = set(self.__config.get(nick, 'channels').split())
			self.__dsn = self.__config.get(nick, 'dsn')
			self.__latitude_client_id = self.__config.get(nick, 'latitude_client_id')
			self.__latitude_consumer = oauth.Consumer(key = self.__latitude_client_id, secret = self.__config.get(nick, 'latitude_client_secret'))
			self.min_update_distance = self.__config.getint(nick, 'min_update_distance')

		except NoOptionError, error:
			sys.exit(error)

		try:
			self.__hostname = self.__config.get(nick, 'hostname')
		except NoOptionError:
			self.__hostname = ''

		ircbot.SingleServerIRCBot.__init__(self, servers, nick, 'Location Bot')

		if bot is None:
			self.__geocode_cache = {}
			self.__locations = []
			self.__logins = {}
			self.__nick = None
			self.__reloading = False
		else:
			self.__geocode_cache = bot.__geocode_cache
			irclibobj = self.ircobj.connections[0].irclibobj
			self.ircobj.connections[0] = bot.ircobj.connections[0]
			self.ircobj.connections[0].irclibobj = irclibobj
			self.channels = bot.channels
			self.connection = bot.connection
			self.__locations = bot.__locations
			self.__logins = bot.__logins
			self.__nick = bot.__nick
			self.__reloading = True

		self.__geocode_cache_lock = threading.Lock()
		self.__geocode_cache_clean_timer_lock = threading.Lock()
		self.__geocode_cache_clean_timer = None
		self.__latitude_granularities = frozenset(['city', 'best'])
		self.__latitude_timer_lock = threading.Lock()
		self.__latitude_timer = None
		self.__locations_lock = threading.Lock()
		self.__quiting = False
		self.__timeout = 5
		self.__variables = frozenset(['nick', 'secret', 'masks', 'channels', 'timezone', 'location', 'coordinates', 'latitude'])
		self.__geocode_variables = self.__variables.intersection(['location', 'coordinates'])
		self.__lists = self.__variables.intersection(['masks', 'channels'])
		self.__unsetable = self.__variables.difference(['nick', 'secret'])

	def __admin(self, nickmask):
		return _or(lambda admin: irclib.mask_matches(nickmask, admin), self.__admins)

	def __channel(self, nick, exclude = None):
		if exclude is not None:
			exclude = irclib.irc_lower(exclude)
			channels = map(lambda channel: channel[1], filter(lambda channel: irclib.irc_lower(channel[0]) == exclude, self.channels))
		else:
			channels = self.channels.values()

		return _or(lambda channel: channel.has_user(nick), channels)

	def __distance(self, distance):
		if distance is not None:
			return '%.1f m (%.1f ft)' % (distance, _meters_to_feet(distance))

	def __db(self):
		db = psycopg2.connect(self.__dsn)

		def point(value, cursor):
			if value is not None:
				return tuple(map(lambda a: float(a), re.match(r'^\(([^)]+),([^)]+)\)$', value).groups()))

		psycopg2.extensions.register_type(psycopg2.extensions.new_type((600,), 'point', point), db)

		return db, db.cursor()

	def __geocode(self, sensor, coordinates = None, location = None):
		parameters = {'sensor': 'true' if sensor else 'false'}

		with self.__geocode_cache_lock:
			if coordinates is not None:
				try:
					return self.__geocode_cache[coordinates][0]
				except KeyError:
					parameters['latlng'] = '%f,%f' % coordinates
			else:
				try:
					return self.__geocode_cache[coordinates][0]
				except KeyError:
					parameters['address'] = location

		geocode = json.load(urllib2.urlopen('http://maps.google.com/maps/api/geocode/json?' + urllib.urlencode(parameters), timeout = self.__timeout))
		status = geocode['status']

		if status != 'OK':
			if coordinates is not None and status == 'ZERO_RESULTS':
				return self.__geocode(sensor, location = parameters['latlng'])
			else:
				raise Exception(status)

		results = geocode['results']

		def _result():
			_location = result['geometry']['location']
			geocode = (_location['lat'], _location['lng']), result['formatted_address']

			with self.__geocode_cache_lock:
				self.__geocode_cache[coordinates if coordinates is not None else location] = (geocode, datetime.utcnow())

			return geocode

		types = frozenset([
			'country',
			'administrative_area_level_1',
			'administrative_area_level_2',
			'administrative_area_level_3',
			'colloquial_area',
			'locality',
			'sublocality',
			'neighborhood',
		])

		for result in results:
			if not types.isdisjoint(result['types']):
				return _result()

		result = results[0]

		return _result()

	def __geocode_cache_clean(self):
		now = datetime.utcnow()

		try:
			while now < self.__geocode_cache_clean_next:
				time.sleep((self.__geocode_cache_clean_next - now).seconds)

				now = datetime.utcnow()
		except AttributeError:
			self.__geocode_cache_length = timedelta(hours = 1)

		self.__geocode_cache_clean_next = now.replace(minute = 2, second = 30, microsecond = 0) + self.__geocode_cache_length

		with self.__geocode_cache_lock:
			for location, (geocode, created) in self.__geocode_cache.items():
				if now - created >= self.__geocode_cache_length:
					del self.__geocode_cache[location]

		with self.__geocode_cache_clean_timer_lock:
			self.__geocode_cache_clean_timer = threading.Timer((self.__geocode_cache_clean_next - datetime.utcnow()).seconds, self.__latitude)

			self.__geocode_cache_clean_timer.start()

	def __heading(self, heading):
		if heading is not None:
			return _encode(u'%.1f\xb0 (%s)' % (heading, _heading_to_direction(heading)))

	def __help(self, connection, nick, admin, login, arguments):
		command = irclib.irc_lower(arguments.split(None, 1)[0].lstrip('!')) if arguments else None
		commands = {
			'help': ('[command]', 'show this help message'),
			'status': ('[nick]', 'show where everybody or a nick is'),
		}

		if not login:
			commands.update({
				'login': ('[nick] [secret]', 'log in as nick with secret or using masks'),
				'register': ('[nick] secret', 'register as nick with secret'),
			})
		else:
			commands.update({
				'logout': ('', 'log out as nick'),
				'set': ('[variable [value]]', 'display or set variables'),
				'unset': ('variable', 'unset a variable'),
			})

		if admin:
			commands.update({
				'join': ('channel', 'join a channel'),
				'part': ('channel [message]', 'part from a channel'),
				'quit': ('[message]', 'quit and do not come back'),
				'reload': ('', 'reload with more up to date code'),
				'restart': ('', 'quit and join running more up to date code'),
				'say': ('nick|channel message', 'say message to nick or channel'),
				'who': ('', 'show who is logged in'),
			})

		connection.privmsg(nick, '\x02command     arguments               description\x0f')

		def help(command, arguments, description):
			connection.privmsg(nick, '%-11s %-23s %s' % (command, arguments, description))

		if command in commands:
			help(command, *commands[command])
		else:
			for command, (arguments, description) in sorted(commands.iteritems()):
				help(command, arguments, description)

	def __join(self, connection, nick, arguments):
		try:
			channel = arguments.split(None, 1)[0]
		except IndexError:
			return self.__help(connection, nick, True, False, 'join')

		connection.join(channel)
		self.__channels.add(channel)
		self.__config.set(self._nickname, 'channels', ' '.join(self.__channels))
		self.__write()
		connection.privmsg(nick, 'successfully joined channel ("%s")' % channel)

	def __latitude(self, granularity = None, token = None, secret = None):
		if granularity is not None:
			response, content = oauth.Client(self.__latitude_consumer, oauth.Token(token, secret), timeout = self.__timeout).request('https://www.googleapis.com/latitude/v1/currentLocation?' + urllib.urlencode({'granularity': granularity}), 'GET')

			if int(response['status']) != 200:
				raise Exception(content.strip())

			data = json.loads(content)['data']
			coordinates = (data['latitude'], data['longitude'])

			return datetime.fromtimestamp(int(data['timestampMs']) / 1e3, pytz.utc), coordinates, data.get('accuracy'), data.get('speed'), data.get('heading'), data.get('altitude'), data.get('altitudeAccuracy'), self.__geocode(False, coordinates = coordinates)[1]

		now = datetime.utcnow()

		try:
			while now < self.__latitude_next:
				time.sleep((self.__latitude_next - now).seconds)

				now = datetime.utcnow()
		except AttributeError:
			pass

		self.__latitude_next = now.replace(minute = now.minute - now.minute % 5, second = 0, microsecond = 0) + timedelta(minutes = 5)

		try:
			db, cursor = self.__db()

			cursor.execute('select nick, channels, latitude.granularity, location, coordinates, accuracy, speed, heading, altitude, altitude_accuracy, updated, token, latitude.secret from locationbot.nick join locationbot.latitude using (id)')

			for nick, channels, granularity, old_location, old_coordinates, old_accuracy, old_speed, old_heading, old_altitude, old_altitude_accuracy, old_updated, token, secret in cursor.fetchall():
				try:
					updated, coordinates, accuracy, speed, heading, altitude, altitude_accuracy, location = self.__latitude(granularity, token, secret)
				except KeyError, error:
					print nick, error
					continue
				except Exception, error:
					traceback.print_exc()
					continue

				cursor.execute('update locationbot.nick set granularity = %s, location = %s, coordinates = point %s, accuracy = %s, speed = %s, heading = %s, altitude = %s, altitude_accuracy = %s, updated = %s where nick = %s', (granularity, location, coordinates, accuracy, speed, heading, altitude, altitude_accuracy, updated, nick))
				db.commit()

				self.__location(nick, channels, granularity, old_location, location, old_coordinates, coordinates, old_accuracy, accuracy, old_speed, speed, old_heading, heading, old_altitude, altitude, old_altitude_accuracy, altitude_accuracy, old_updated, updated)
		except psycopg2.Error, error:
			traceback.print_exc()

		with self.__latitude_timer_lock:
			self.__latitude_timer = threading.Timer((self.__latitude_next - datetime.utcnow()).seconds, self.__latitude)

			self.__latitude_timer.start()

	def __location(self, nick, channels, granularity, old_location, new_location, old_coordinates, new_coordinates, old_accuracy, new_accuracy, old_speed, new_speed, old_heading, new_heading, old_altitude, new_altitude, old_altitude_accuracy, new_altitude_accuracy, old_updated, new_updated):
		def calc_distance(lat1, lon1, lat2, lon2): # returns meters
			nauticalMilePerLat = 60.00721
			nauticalMilePerLongitude = 60.10793
			rad = math.pi / 180.0
			milesPerNauticalMile = 1.15078
			metersPerNauticalMile = 1852

			yDistance = (lat2 - lat1) * nauticalMilePerLat
			xDistance = (math.cos(lat1 * rad) + math.cos(lat2 * rad)) * \
			                (lon2 - lon1) * (nauticalMilePerLongitude / 2)
			distance = math.sqrt( yDistance**2 + xDistance**2 )
			return distance * metersPerNauticalMile

		def make_update_noise():
			with self.__locations_lock:
				for channel in self.__channels.intersection(channels):
					self.__locations.append((nick, channel, granularity, new_location, new_coordinates, new_accuracy, new_speed, new_heading, new_altitude, new_altitude_accuracy))

		if channels:
			if new_location != old_location: # old method
				return make_update_noise()

			distance = calc_distance(old_coordinates[0], old_coordinates[1],
									 new_coordinates[0], new_coordinates[1])

			if distance < self.min_update_distance:
				return

			if old_accuracy is not None and new_accuracy is not None:
				avg_radius = (old_accuracy + new_accuracy) / 2

				if distance > avg_radius:
					return make_update_noise()

				min_radius = min(old_accuracy, new_accuracy)

				if distance > min_radius and new_accuracy < old_accuracy:
					return make_update_noise()

	def __login(self, connection, nickmask, nick, arguments = ''):
		login = nick

		if connection is not None:
			arguments = arguments.split(None, 1)

			if len(arguments) == 2:
				login, secret = arguments
			elif len(arguments) == 1:
				secret = arguments[0]
			else:
				secret = None
		else:
			secret = None

		if nick in self.__logins:
			login = self.__logins[nick][0]

			if connection is not None:
				return connection.privmsg(nick, 'already logged in as "%s"' % login)

			return login

		db, cursor = self.__db()

		def success():
			connection.privmsg(nick, 'successfully logged in as "%s"' % login)

		if secret is not None:
			cursor.execute('select true from locationbot.nick where nick = %s and secret = md5(%s)', (login, secret))

			if cursor.rowcount == 1:
				self.__logins[nick] = (login, nickmask)

				return success()

		cursor.execute('select nick, masks from locationbot.nick where nick in (%s, %s)', (login, secret if len(arguments) != 2 else None))

		for login, masks in cursor.fetchall():
			if _or(lambda mask: irclib.mask_matches(nickmask, mask), masks):
				self.__logins[nick] = (login, nickmask)

				return success() if connection else login

		if connection is not None:
			return connection.privmsg(nick, 'failed to log in as "%s"' % login)

	def __logout(self, connection, nick):
		connection.privmsg(nick, 'logged out as "%s"' % self.__logins.pop(nick)[0])

	def __part(self, connection, nick, arguments):
		arguments = arguments.split(None, 1)

		if len(arguments) == 2:
			channel, message = arguments
			message = ':' + message
		elif len(arguments) == 1:
			channel = arguments[0]
			message = ''
		else:
			return self.__help(connection, nick, True, False, 'part')

		if channel in self.__channels:
			connection.part(channel, message)
			self.__channels.remove(channel)
			self.__config.set(self._nickname, 'channels', ' '.join(self.__channels))
			self.__write()
			connection.privmsg(nick, 'successfully parted channel ("%s")' % channel)
		else:
			connection.privmsg(nick, 'not in channel ("%s")' % channel)

	def __quit(self, connection, nick, arguments):
		self.__reloading = True
		self.__quiting = True

		connection.privmsg(nick, 'quiting')
		self.disconnect(arguments)

	def __register(self, connection, nick, arguments):
		arguments = arguments.split(None, 1)

		if len(arguments) == 2:
			login, secret = arguments
		elif len(arguments) == 1:
			login = nick
			secret = arguments[0]
		else:
			return self.__help(connection, nick, False, False, 'register')

		db, cursor = self.__db()

		try:
			cursor.execute('insert into locationbot.nick (nick, secret) values (%s, md5(%s))', (login, secret))
			db.commit()
		except psycopg2.IntegrityError:
			return connection.privmsg(nick, 'nick ("%s") is already registered' % login)

		connection.privmsg(nick, 'nick ("%s") sucessfully registered' % login)

	def __reload(self, connection, nick):
		self.__nick = nick
		self.__reloading = True

		connection.privmsg(nick, 'reloading')

	def __restart(self, connection):
		connection.disconnect('restarting')
		os.execvp(sys.argv[0], sys.argv)

	def __say(self, connection, nick, arguments):
		try:
			nick_channel, message = arguments.split(None, 1)
		except ValueError:
			return self.__help(connection, nick, True, False, 'say')

		if irclib.is_channel(nick_channel):
			if nick_channel not in self.channels:
				return connection.privmsg(nick, 'not in channel ("%s")' % nick_channel)
		elif not self.__channel(nick_channel):
			return connection.privmsg(nick, 'nick ("%s") not in channel(s)' % nick_channel)
		elif nick_channel == connection.get_nickname():
			return connection.privmsg(nick, 'nice try')

		connection.privmsg(nick_channel, message)
		connection.privmsg(nick, 'successfully sent message ("%s") to nick/channel ("%s")' % (message, nick_channel))

	def __set(self, connection, nickmask, nick, login, arguments):
		arguments = arguments.split(None, 1)

		if len(arguments) == 2:
			variable, value = arguments
		elif len(arguments) == 1:
			variable = arguments[0]
			value = None
		else:
			variable = None
			value = None

		if variable is not None and variable not in self.__variables:
			return self.__unknown_variable(connection, nick, variable)

		db, cursor = self.__db()

		if value is None:
			variables = sorted(self.__variables) if variable is None else [variable]

			cursor.execute('select ' + ', '.join(map(lambda variable: "'%s'" % ('*' * 8) if variable == 'secret' else 'latitude.granularity, latitude.authorized' if variable == 'latitude' else variable, variables)) + ' from locationbot.nick left join locationbot.latitude using (id) where nick = %s', (login,))

			values = list(cursor.fetchone())

			try:
				index = variables.index('latitude')
				values[index:index + 2] = ['%s (%s)' % (values[index], 'authorized' if values[index + 1] else 'unauthorized')]
			except ValueError:
				pass

			connection.privmsg(nick, '\x02variable    value\x0f')

			for variable, value in zip(variables, values):
				connection.privmsg(nick, '%-11s %s' % (variable, ' '.join(value) if isinstance(value, list) else '%f,%f' % value if isinstance(value, tuple) else value))
		else:
			def invalid(value, variable = variable):
				connection.privmsg(nick, 'invalid %s ("%s")' % (variable, value))

			if variable in self.__lists:
				value = value.split()

				if variable == 'channels':
					for channel in value:
						if not irclib.is_channel(channel) or channel not in self.__channels:
							return invalid(channel, 'channel')
				elif variable == 'masks':
					_mask = re.compile('^.+!.+@.+$')

					for mask in value:
						if not _mask.match(mask):
							return invalid(mask, 'mask')
			elif variable == 'latitude':
				if value in self.__latitude_granularities:
					response, content = oauth.Client(self.__latitude_consumer, timeout = self.__timeout).request('https://www.google.com/accounts/OAuthGetRequestToken', 'POST', urllib.urlencode({
						'scope': 'https://www.googleapis.com/auth/latitude',
						'oauth_callback': 'oob',
					}))

					if int(response['status']) != 200:
						raise Exception(content.strip())

					authorized = False
				else:
					cursor.execute('select channels, location, latitude.granularity, token, latitude.secret from locationbot.nick join locationbot.latitude using (id) where nick = %s and authorized = false', (login,))

					if cursor.rowcount == 0:
						return invalid(value)

					channels, old_location, granularity, token, secret = cursor.fetchone()
					token = oauth.Token(token, secret)

					token.set_verifier(value)

					response, content = oauth.Client(self.__latitude_consumer, token, timeout = self.__timeout).request('https://www.google.com/accounts/OAuthGetAccessToken', 'GET')
					status = int(response['status'])

					if status == 400:
						return invalid(value)
					elif status != 200:
						raise Exception(content.strip())

					authorized = True

				data = dict(urlparse.parse_qsl(content))
				token = data['oauth_token']
				secret = data['oauth_token_secret']

				if not authorized:
					connection.privmsg(nick, 'go to https://www.google.com/latitude/apps/OAuthAuthorizeToken?' + urllib.urlencode({
						'domain': self.__latitude_client_id,
						'granularity': value,
						'oauth_token': token,
					}))
			elif variable in self.__geocode_variables:
				cursor.execute('select channels, location, latitude.granularity, token, latitude.secret, authorized from locationbot.nick left join locationbot.latitude using (id) where nick = %s', (login,))

				channels, old_location, granularity, token, secret, authorized = cursor.fetchone()

				if variable == 'location':
					coordinates = None
					granularity = 'city'
					location = value
				else:
					coordinates = value.split(None, 1)

					if len(coordinates) == 1:
						coordinates = coordinates[0].split(',', 1)

					try:
						coordinates = tuple(map(lambda a: float(a), coordinates))
					except ValueError:
						return invalid(value)

					for coordinate in coordinates:
						if not -180.0 <= coordinate <= 180.0:
							return invalid(value)

					location = None

				geocode = self.__geocode(False, coordinates, location)
				new_location = geocode[1]

				if variable == 'location':
					coordinates = geocode[0]
					value = new_location
				else:
					value = coordinates

				if authorized:
					response, content = oauth.Client(self.__latitude_consumer, oauth.Token(token, secret), timeout = self.__timeout).request('https://www.googleapis.com/latitude/v1/currentLocation?' + urllib.urlencode({'granularity': granularity}), 'POST', json.dumps({'data': {
						'kind': 'latitude#location',
						'latitude': coordinates[0],
						'longitude': coordinates[1],
					}}), {'Content-Type': 'application/json'})

					if int(response['status']) != 200:
						raise Exception(content.strip())

				accuracy = speed = heading = altitude = altitude_accuracy = None
			elif variable == 'nick':
				_nick = value.split(None, 1)

				if len(_nick) != 1:
					return invalid(value)
			elif variable == 'timezone':
				if value not in pytz.all_timezones_set:
					return invalid(value)

			try:
				if variable in self.__geocode_variables:
					cursor.execute('update locationbot.nick set granularity = %s, location = %s, coordinates = point %s, accuracy = %s, speed = %s, heading = %s, altitude = %s, altitude_accuracy = %s, updated = now() where nick = %s', (granularity, new_location, coordinates, accuracy, speed, heading, altitude, altitude_accuracy, login))
				elif variable == 'latitude':
					if authorized:
						cursor.execute('update locationbot.latitude set token = %s, secret = %s, authorized = %s from locationbot.nick where latitude.id = nick.id and nick = %s', (token, secret, authorized, login))
					else:
						cursor.execute('delete from locationbot.latitude using locationbot.nick where latitude.id = nick.id and nick = %s', (login,))
						cursor.execute('insert into locationbot.latitude (id, granularity, token, secret, authorized) select id, %s, %s, %s, %s from locationbot.nick where nick = %s', (value, token, secret, authorized, login))
				else:
					cursor.execute('update locationbot.nick set ' + variable + ' = ' + ('md5(%s)' if variable == 'secret' else '%s') + ' where nick = %s', (value, login))

				db.commit()
			except psycopg2.IntegrityError:
				if variable == 'nick':
					return connection.privmsg(nick, 'nick ("%s") is already registered' % value)

				raise

			connection.privmsg(nick, 'variable ("%s") successfully set to value ("%s")' % (variable, ' '.join(value) if isinstance(value, list) else '%f,%f' % value if isinstance(value, tuple) else value))

			if variable == 'nick':
				self.__logins[nick] = (value, nickmask)
			elif variable in self.__geocode_variables or variable == 'latitude' and authorized:
				if variable == 'latitude':
					updated, coordinates, accuracy, speed, heading, altitude, altitude_accuracy, new_location = self.__latitude(granularity, token, secret)

					cursor.execute('update locationbot.nick set granularity = %s, location = %s, coordinates = point %s, accuracy = %s, speed = %s, heading = %s, altitude = %s, altitude_accuracy = %s, updated = %s where nick = %s', (granularity, new_location, coordinates, accuracy, speed, heading, altitude, altitude_accuracy, updated, login))

					self.__location(login, channels, granularity, old_location, new_location, None, coordinates, None, accuracy, None, speed, None, heading, None, altitude, None, altitude_accuracy, None, updated)

	def __speed(self, speed):
		if speed is not None:
			return '%.1f m/s (%.1f mph)' % (speed, _meters_per_second_to_miles_per_hour(speed))

	def __status(self, connection, nick, login, arguments):
		_nick = arguments.split(None, 1)[0] if arguments else None
		db, cursor = self.__db()

		cursor.execute('select nick, granularity, location, coordinates, accuracy, speed, heading, altitude, altitude_accuracy, updated from locationbot.nick where ' + ('nick = %s and ' if _nick is not None else '') + 'location is not null order by updated desc', (_nick,))

		if cursor.rowcount == 0:
			return connection.privmsg(nick, 'no location information for ' + ('"%s"' % _nick if _nick is not None else 'anybody'))

		locations = cursor.fetchall()

		if login is not None:
			cursor.execute('select timezone from locationbot.nick where nick = %s and timezone is not null', (login,))

			timezone = pytz.timezone(cursor.fetchone()[0]) if cursor.rowcount == 1 else pytz.utc
		else:
			timezone = pytz.utc

		connection.privmsg(nick, '\x02%-24s%-36s%-24s%-24s%-16s%-24s%-24s%-24s%s\x0f' % ('nick', 'location', 'accuracy', 'speed', 'heading', 'altitude', 'altitude accuracy', 'when', 'map'))

		for _nick, granularity, location, coordinates, accuracy, speed, heading, altitude, altitude_accuracy, updated in locations:
			connection.privmsg(nick, '%-23s %-35s %-23s %-23s %-15s %-23s %-23s %-23s %s' % (_nick, location, self.__distance(accuracy), self.__speed(speed), self.__heading(heading), self.__distance(altitude), self.__distance(altitude_accuracy), timezone.normalize(updated.astimezone(timezone)).strftime('%Y-%m-%d %H:%M %Z'), self.__url(_nick, granularity, location, coordinates)))

	def __unknown(self, connection, nick, command):
		connection.privmsg(nick, 'unknown command ("%s"); try "help"' % command)

	def __unknown_variable(self, connection, nick, variable):
		connection.privmsg(nick, 'unknown variable ("%s")' % variable)

	def __unset(self, connection, nick, login, arguments):
		try:
			variable = irclib.irc_lower(arguments.split(None, 1)[0])
		except IndexError:
			return self.__help(connection, nick, False, login, 'unset')

		if variable not in self.__unsetable:
			if variable in self.__variables:
				return connection.privmsg(nick, 'variable ("%s") is not unsetable' % variable)

			return self.__unknown_variable(connection, nick, variable)

		db, cursor = self.__db()

		cursor.execute('update locationbot.nick set ' + ('location = null, coordinates = null, updated = null' if variable in self.__geocode_variables else variable + ' = null') + ' where nick = %s and ' + variable + ' is not null', (login,))
		db.commit()
		connection.privmsg(nick, 'variable ("%s") %s unset' % (variable, 'successfuly' if cursor.rowcount == 1 else 'already'))

	def __url(self, nick, granularity, location, coordinates):
		if granularity == 'best':
			location = '%f,%f' % coordinates

		return 'http://maps.google.com/maps?' + re.sub('%(2[cC])', lambda match: chr(int(match.group(1), 16)), urllib.urlencode({'q': '%s (%s)' % (location, nick)}))

	def __who(self, connection, nick):
		if self.__logins:
			connection.privmsg(nick, '\x02login nick              nick mask\x0f')

			for login in sorted(self.__logins.values()):
				connection.privmsg(nick, '%-23s %s' % login)
		else:
			connection.privmsg(nick, 'nobody logged in')

	def __write(self):
		with open('locationbot.ini', 'w') as config:
			self.__config.write(config)

	def _connect(self):
		if len(self.server_list[0]) != 2:
			ssl = self.server_list[0][2]
		else:
			ssl = False

		if len(self.server_list[0]) == 4:
			password = self.server_list[0][3]
		else:
			password = None

		try:
			with warnings.catch_warnings():
				warnings.filterwarnings('ignore', r'socket\.ssl\(\) is deprecated\.  Use ssl\.wrap_socket\(\) instead\.', DeprecationWarning)
				self.connect(self.server_list[0][0], self.server_list[0][1], self._nickname, password, getpass.getuser(), self._realname, localaddress = self.__hostname, ssl = ssl)
		except irclib.ServerConnectionError:
			pass

	def disconnect(self, message = 'oh no!'):
		ircbot.SingleServerIRCBot.disconnect(self, message)

	def error(self, error):
		traceback.print_exc()
		self.connection.privmsg(self.__nick, 'an error occured')

	def get_version(self):
		return 'locationbot ' + sys.platform

	def on_kick(self, connection, event):
		nick = event.arguments()[0]

		if not self.__channel(nick, event.target()):
			self.__logins.pop(nick, None)

	def on_nick(self, connection, event):
		nickmask = event.source()
		login = self.__logins.pop(irclib.nm_to_n(nickmask), (None,))[0]

		if login is not None:
			nick = event.target()
			self.__logins[nick] = (login, nick + '!' + irclib.nm_to_uh(nickmask))

	def on_nicknameinuse(self, connection, event):
		connection.nick(connection.get_nickname() + '_')

	def on_part(self, connection, event):
		nick = irclib.nm_to_n(event.source())

		if not self.__channel(nick, event.target()):
			self.__logins.pop(nick, None)

	def on_privmsg(self, connection, event):
		nickmask = event.source()
		nick = irclib.nm_to_n(nickmask)
		admin = self.__admin(nickmask)

		if not admin and not self.__channel(nick):
			return

		try:
			login = self.__login(None, nickmask, nick)

			try:
				command, arguments = event.arguments()[0].split(None, 1)
			except ValueError:
				command = event.arguments()[0].strip()
				arguments = ''

			command = irclib.irc_lower(command.lstrip('!'))

			if command == 'help':
				self.__help(connection, nick, admin, login, arguments)
			elif command == 'login':
				self.__login(connection, nickmask, nick, arguments)
			elif command == 'status':
				self.__status(connection, nick, login, arguments)
			elif not login and command == 'register':
				self.__register(connection, nick, arguments)
			elif login and command == 'logout':
				self.__logout(connection, nick)
			elif login and command == 'set':
				self.__set(connection, nickmask, nick, login, arguments)
			elif login and command == 'unset':
				self.__unset(connection, nick, login, arguments)
			elif admin and command == 'join':
				self.__join(connection, nick, arguments)
			elif admin and command == 'part':
				self.__part(connection, nick, arguments)
			elif admin and command == 'quit':
				self.__quit(connection, nick, arguments)
			elif admin and command == 'reload':
				self.__reload(connection, nick)
			elif admin and command == 'restart':
				self.__restart(connection)
			elif admin and command == 'say':
				self.__say(connection, nick, arguments)
			elif admin and command == 'who':
				self.__who(connection, nick)
			else:
				self.__unknown(connection, nick, command)
		except Exception, error:
			traceback.print_exc()
			connection.privmsg(nick, 'an error occurred')

	def on_quit(self, connection, event):
		self.__logins.pop(irclib.nm_to_n(event.source()), None)

	def on_welcome(self, connection, event):
		for channel in self.__channels:
			connection.join(channel)

	def start(self):
		latitude_thread = threading.Thread(None, self.__latitude)
		latitude_thread.daemon = True

		latitude_thread.start()

		geocode_cache_clean_thread = threading.Thread(None, self.__geocode_cache_clean)
		geocode_cache_clean_thread.daemon = True

		geocode_cache_clean_thread.start()

		if not self.__reloading:
			self._connect()
		else:
			self.__reloading = False

			for channel in self.__channels.symmetric_difference(self.channels.keys()):
				if channel in self.__channels:
					self.connection.join(channel)
				else:
					self.connection.part(channel)

		ping_next = datetime.utcnow() + timedelta(minutes = 1)

		while not self.__reloading:
			try:
				now = datetime.utcnow()

				if now >= ping_next:
					self.connection.ping(self.connection.server)

					ping_next = now + timedelta(minutes = 1)

				if self.__locations_lock.acquire(False):
					if self.__locations and self.__channels.issubset(self.channels.keys()):
						for nick, channel, granularity, location, coordinates, accuracy, speed, heading, altitude, altitude_accuracy in self.__locations:
							aux = []

							if accuracy is not None:
								aux.append('accuracy: ' + self.__distance(accuracy))

							if speed is not None:
								aux.append('speed: ' + self.__speed(speed))

							if heading is not None:
								aux.append(u'heading: ' + self.__heading(heading))

							if altitude is not None:
								aux.append('altitude: ' + self.__distance(altitude))

							if altitude_accuracy is not None:
								aux.append('altitude accuracy: ' + self.__distance(altitude_accuracy))

							if aux:
								aux = ' [%s]' % ', '.join(aux)
							else:
								aux = ''

							self.connection.notice(channel, '%s is in %s%s %s' % (nick, _encode(location), aux, self.__url(nick, granularity, location, coordinates)))

						self.__locations = []

					self.__locations_lock.release()
			except irclib.ServerNotConnectedError:
				self.jump_server()

			self.ircobj.process_once(0.2)

		latitude_thread.join()
		geocode_cache_clean_thread.join()

		with self.__latitude_timer_lock:
			if self.__latitude_timer is not None:
				self.__latitude_timer.cancel()
				self.__latitude_timer.join()

		with self.__geocode_cache_clean_timer_lock:
			if self.__geocode_cache_clean_timer is not None:
				self.__geocode_cache_clean_timer.cancel()
				self.__geocode_cache_clean_timer.join()

		return not self.__quiting

	def success(self):
		self.connection.privmsg(self.__nick, 'successfully reloaded')

class _AddressMask(object):
	def __init__(self, function):
		self.function = function

	def __call__(self, nick, mask):
		if not self.function(nick, mask):
			nick, address = nick.split('@', 1)

			try:
				host = socket.gethostbyaddr(address)[0]
			except socket.herror:
				pass
			else:
				if host != address:
					return self.function(nick + '@' + host, mask)

			return False

		return True

irclib.mask_matches = _AddressMask(reload(irclib).mask_matches)

def _encode(string):
	try:
		return string.encode('latin1')
	except UnicodeEncodeError:
		return string.encode('utf8')

def _meters_per_second_to_miles_per_hour(meters_per_second):
	return meters_per_second * 2.23693629

def _meters_to_feet(meters):
	return meters * 3.2808399

def _heading_to_direction(heading):
	heading %= 360

	if 348.75 < heading or heading <= 11.25:
		return 'N'
	elif 11.25 < heading <= 33.75:
		return 'NNE'
	elif 33.75 < heading <= 56.25:
		return 'NE'
	elif 56.25 < heading <= 78.75:
		return 'ENE'
	elif 78.75 < heading <= 101.25:
		return 'E'
	elif 101.25 < heading <= 123.75:
		return 'ESE'
	elif 123.75 < heading <= 146.25:
		return 'SE'
	elif 146.25 < heading <= 168.75:
		return 'SSE'
	elif 168.75 < heading <= 191.25:
		return 'S'
	elif 191.25 < heading <= 213.75:
		return 'SSW'
	elif 213.75 < heading <= 236.25:
		return 'SW'
	elif 236.25 < heading <= 258.75:
		return 'WSW'
	elif 258.75 < heading <= 281.25:
		return 'W'
	elif 281.25 < heading <= 303.75:
		return 'WNW'
	elif 303.75 < heading <= 326.25:
		return 'NW'
	else:
		return 'NNW'

def _or(function, values):
	if values:
		for value in values:
			if function(value):
				return True

	return False

if __name__ == '__main__':
	os.chdir(os.path.abspath(os.path.dirname(__file__)))

	pid = os.fork()

	if pid != 0:
		with open('locationbot.pid', 'w') as _file:
			_file.write('%u\n' % pid)

		sys.exit(0)

	sys.stdin = open('/dev/null')
	sys.stdout = open('locationbot.log', 'a', 1)
	sys.stderr = sys.stdout

	import locationbot

	bot = locationbot.LocationBot()

	try:
		while bot.start():
			import locationbot

			try:
				bot = reload(locationbot).LocationBot(bot)
			except (ImportError, SyntaxError), error:
				bot.error(error)
			else:
				bot.success()
	except KeyboardInterrupt:
		bot.disconnect()

	os.unlink('locationbot.pid')