##	common/connection.py
##
## Contributors for this file:
##	- Yann Le Boulanger <asterix@lagaule.org>
##	- Nikos Kouremenos <nkour@jabber.org>
##	- Dimitur Kirov <dkirov@gmail.com>
##	- Travis Shirk <travis@pobox.com>
##
## Copyright (C) 2003-2004 Yann Le Boulanger <asterix@lagaule.org>
##                         Vincent Hanquez <tab@snarc.org>
## Copyright (C) 2005 Yann Le Boulanger <asterix@lagaule.org>
##                    Vincent Hanquez <tab@snarc.org>
##                    Nikos Kouremenos <nkour@jabber.org>
##                    Dimitur Kirov <dkirov@gmail.com>
##                    Travis Shirk <travis@pobox.com>
##                    Norman Rasmussen <norman@rasmussen.co.za>
##
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published
## by the Free Software Foundation; version 2 only.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##


import sys
import os
import time
import traceback
import random
random.seed()

import signal
if os.name != 'nt':
	signal.signal(signal.SIGPIPE, signal.SIG_DFL)

import common.xmpp
from common import helpers
from common import gajim
from common import GnuPG

from connection_handlers import *
USE_GPG = GnuPG.USE_GPG

from common import i18n
_ = i18n._

class Connection(ConnectionHandlers):
	'''Connection class'''
	def __init__(self, name):
		ConnectionHandlers.__init__(self)
		self.name = name
		self.connected = 0 # offline
		self.connection = None # xmpppy ClientCommon instance
		# this property is used to prevent double connections
		self.last_connection = None # last ClientCommon instance
		self.gpg = None
		self.status = ''
		self.old_show = ''
		# increase/decrease default timeout for server responses
		self.try_connecting_for_foo_secs = 45
		# holds the actual hostname to which we are connected
		self.connected_hostname = None
		self.time_to_reconnect = None
		self.new_account_info = None
		self.bookmarks = []
		self.on_purpose = False
		self.last_io = gajim.idlequeue.current_time()
		self.last_sent = []
		self.last_history_line = {}
		self.password = gajim.config.get_per('accounts', name, 'password')
		self.server_resource = gajim.config.get_per('accounts', name, 'resource')
		if gajim.config.get_per('accounts', self.name, 'keep_alives_enabled'):
			self.keepalives = gajim.config.get_per('accounts', self.name,'keep_alive_every_foo_secs')
		else:
			self.keepalives = 0
		self.privacy_rules_supported = False
		# Do we continue connection when we get roster (send presence,get vcard...)
		self.continue_connect_info = None
		if USE_GPG:
			self.gpg = GnuPG.GnuPG()
			gajim.config.set('usegpg', True)
		else:
			gajim.config.set('usegpg', False)
		
		self.on_connect_success = None
		self.retrycount = 0
		self.jids_for_auto_auth = [] # list of jid to auto-authorize
		
	# END __init__
	def put_event(self, ev):
		if gajim.handlers.has_key(ev[0]):
			gajim.handlers[ev[0]](self.name, ev[1])

	def dispatch(self, event, data):
		'''always passes account name as first param'''
		self.put_event((event, data))


	def _reconnect(self):
		# Do not try to reco while we are already trying
		self.time_to_reconnect = None
		gajim.log.debug('reconnect')
		self.retrycount += 1
		signed = self.get_signed_msg(self.status)
		self.on_connect_auth = self._init_roster
		self.connect_and_init(self.old_show, self.status, signed)

		if self.connected < 2: #connection failed
			if self.retrycount > 10:
				self.connected = 0
				self.dispatch('STATUS', 'offline')
				self.dispatch('ERROR',
				(_('Connection with account "%s" has been lost') % self.name,
				_('To continue sending and receiving messages, you will need to reconnect.')))
				self.retrycount = 0
				return
			if self.retrycount > 5:
				self.time_to_reconnect = 20
			else:
				self.time_to_reconnect = 10
			gajim.idlequeue.set_alarm(self._reconnect_alarm, self.time_to_reconnect)
		else:
			# reconnect succeeded
			self.time_to_reconnect = None
			self.retrycount = 0

	def _disconnectedReconnCB(self):
		'''Called when we are disconnected'''
		gajim.log.debug('disconnectedReconnCB')
		if not self.connection:
			return
		self.old_show = STATUS_LIST[self.connected]
		self.connected = 0
		self.dispatch('STATUS', 'offline')
		gajim.proxy65_manager.disconnect(self.connection)
		self.connection = None
		if not self.on_purpose:
			if gajim.config.get_per('accounts', self.name, 'autoreconnect'):
				self.connected = 1
				self.dispatch('STATUS', 'connecting')
				self.time_to_reconnect = 10
				gajim.idlequeue.set_alarm(self._reconnect_alarm, 10)
			else:
				self.dispatch('ERROR',
				(_('Connection with account "%s" has been lost') % self.name,
				_('To continue sending and receiving messages, you will need to reconnect.')))
		self.on_purpose = False
	# END disconenctedReconnCB
	
	def _event_dispatcher(self, realm, event, data):
		if realm == common.xmpp.NS_REGISTER:
			if event == common.xmpp.features_nb.REGISTER_DATA_RECEIVED:
				# data is (agent, DataFrom, is_form)
				if not data[1]: # wrong answer
					self.dispatch('ERROR', (_('Invalid answer'),
						_('Transport %s answered wrongly to register request.') % \
						data[0]))
					return
				if self.new_account_info and\
				self.new_account_info['hostname'] == data[0]:
					#it's a new account
					req = data[1].asDict()
					req['username'] = self.new_account_info['name']
					req['password'] = self.new_account_info['password']
					def _on_register_result(result):
						if not result:
							self.dispatch('ACC_NOT_OK', (self.connection.lastErr))
							return
						self.connected = 0
						self.password = self.new_account_info['password']
						if USE_GPG:
							self.gpg = GnuPG.GnuPG()
							gajim.config.set('usegpg', True)
						else:
							gajim.config.set('usegpg', False)
						gajim.connections[self.name] = self
						self.dispatch('ACC_OK', (self.new_account_info))
						self.new_account_info = None
						self.connection = None
					common.xmpp.features_nb.register(self.connection, data[0],
						req, _on_register_result)
					return
				is_form = data[2]
				if is_form:
					conf = self.parse_data_form(data[1])
				else:
					conf = data[1].asDict()
				self.dispatch('REGISTER_AGENT_INFO', (data[0], conf, is_form))
		elif realm == '':
			if event == common.xmpp.transports.DATA_RECEIVED:
				self.dispatch('STANZA_ARRIVED', unicode(data, errors = 'ignore'))
			elif event == common.xmpp.transports.DATA_SENT:
				self.dispatch('STANZA_SENT', unicode(data))

	def select_next_host(self, hosts):
		hosts_best_prio = []
		best_prio = 65535
		sum_weight = 0
		for h in hosts:
			if h['prio'] < best_prio:
				hosts_best_prio = [h]
				best_prio = h['prio']
				sum_weight = h['weight']
			elif h['prio'] == best_prio:
				hosts_best_prio.append(h)
				sum_weight += h['weight']
		if len(hosts_best_prio) == 1:
			return hosts_best_prio[0]
		r = random.randint(0, sum_weight)
		min_w = sum_weight
		# We return the one for which has the minimum weight and weight >= r
		for h in hosts_best_prio:
			if h['weight'] >= r:
				if h['weight'] <= min_w:
					min_w = h['weight']
		return h

	def connect(self, data = None):
		''' Start a connection to the Jabber server.
		Returns connection, and connection type ('tls', 'ssl', 'tcp', '')
		data MUST contain name, hostname, resource, usessl, proxy,
		use_custom_host, custom_host (if use_custom_host), custom_port (if
		use_custom_host), '''
		if self.connection:
			return self.connection, ''

		if data:
			name = data['name']
			hostname = data['hostname']
			resource = data['resource']
			usessl = data['usessl']
			self.try_connecting_for_foo_secs = 45
			p = data['proxy']
			use_srv = True
			use_custom = data['use_custom_host']
			if use_custom:
				custom_h = data['custom_host']
				custom_p = data['custom_port']
		else:
			name = gajim.config.get_per('accounts', self.name, 'name')
			hostname = gajim.config.get_per('accounts', self.name, 'hostname')
			resource = gajim.config.get_per('accounts', self.name, 'resource')
			usessl = gajim.config.get_per('accounts', self.name, 'usessl')
			self.try_connecting_for_foo_secs = gajim.config.get_per('accounts',
				self.name, 'try_connecting_for_foo_secs')
			p = gajim.config.get_per('accounts', self.name, 'proxy')
			use_srv = gajim.config.get_per('accounts', self.name, 'use_srv')
			use_custom = gajim.config.get_per('accounts', self.name,
				'use_custom_host')
			custom_h = gajim.config.get_per('accounts', self.name, 'custom_host')
			custom_p = gajim.config.get_per('accounts', self.name, 'custom_port')

		#create connection if it doesn't already exist
		self.connected = 1
		if p and p in gajim.config.get_per('proxies'):
			proxy = {'host': gajim.config.get_per('proxies', p, 'host')}
			proxy['port'] = gajim.config.get_per('proxies', p, 'port')
			proxy['user'] = gajim.config.get_per('proxies', p, 'user')
			proxy['password'] = gajim.config.get_per('proxies', p, 'pass')
		else:
			proxy = None

		h = hostname
		p = 5222
		# autodetect [for SSL in 5223/443 and for TLS if broadcasted]
		secur = None
		if usessl:
			p = 5223
			secur = 1 # 1 means force SSL no matter what the port will be
			use_srv = False # wants ssl? disable srv lookup
		if use_custom:
			h = custom_h
			p = custom_p
			use_srv = False

		hosts = []
		# SRV resolver
		self._proxy = proxy
		self._secure = secur
		self._hosts = [ {'host': h, 'port': p, 'prio': 10, 'weight': 10} ]
		self._hostname = hostname
		if use_srv:
			# add request for srv query to the resolve, on result '_on_resolve' will be called
			gajim.resolver.resolve('_xmpp-client._tcp.' + h.encode('utf-8'), self._on_resolve)
		else:
			self._on_resolve('', [])

	def _on_resolve(self, host, result_array):
		# SRV query returned at least one valid result, we put it in hosts dict
		if len(result_array) != 0:
			self._hosts = [i for i in result_array]
		self.connect_to_next_host()

	def connect_to_next_host(self):
		if len(self._hosts):
			if self.last_connection:
				self.last_connection.socket.disconnect()
				self.last_connection = None
				self.connection = None
			if gajim.verbose:
				con = common.xmpp.NonBlockingClient(self._hostname, caller = self,
					on_connect = self.on_connect_success,
					on_connect_failure = self.connect_to_next_host)
			else:
				con = common.xmpp.NonBlockingClient(self._hostname, debug = [], caller = self,
					on_connect = self.on_connect_success,
					on_connect_failure = self.connect_to_next_host)
			self.last_connection = con
			# increase default timeout for server responses
			common.xmpp.dispatcher_nb.DEFAULT_TIMEOUT_SECONDS = self.try_connecting_for_foo_secs
			con.set_idlequeue(gajim.idlequeue)
			host = self.select_next_host(self._hosts)
			self._current_host = host
			self._hosts.remove(host)
			con.connect((host['host'], host['port']), proxy = self._proxy,
				secure = self._secure)
			return
		else:
			self._connect_failure(None)

	def _connect_failure(self, con_type):
		if not con_type:
			# we are not retrying, and not conecting
			if not self.retrycount and self.connected != 0:
				self.connected = 0
				self.dispatch('STATUS', 'offline')
				self.dispatch('ERROR', (_('Could not connect to "%s"') % self._hostname,
					_('Check your connection or try again later.')))

	def _connect_success(self, con, con_type):
		if not self.connected: # We went offline during connecting process
			return None, ''
		self.hosts = []
		if not con_type:
			gajim.log.debug('Could not connect to %s:%s' % (self._current_host['host'],
				self._current_host['port']))
		self.connected_hostname = self._current_host['host']
		con.RegisterDisconnectHandler(self._disconnectedReconnCB)
		gajim.log.debug(_('Connected to server %s:%s with %s') % (self._current_host['host'],
			self._current_host['port'], con_type))
		# Ask meta_contacts before roster
		self.get_meta_contacts()
		self._register_handlers(con, con_type)
		return True

	def _register_handlers(self, con, con_type):
		self.peerhost = con.get_peerhost()
		# notify the gui about con_type
		self.dispatch('CON_TYPE', con_type)
		ConnectionHandlers._register_handlers(self, con, con_type)
		name = gajim.config.get_per('accounts', self.name, 'name')
		hostname = gajim.config.get_per('accounts', self.name, 'hostname')
		resource = gajim.config.get_per('accounts', self.name, 'resource')
		self.connection = con
		con.auth(name, self.password, resource, 1, self.__on_auth)

	def __on_auth(self, con, auth):
		if not con:
			self.connected = 0
			self.dispatch('STATUS', 'offline')
			self.dispatch('ERROR', (_('Could not connect to "%s"') % self._hostname,
				_('Check your connection or try again later')))
			if self.on_connect_auth:
				self.on_connect_auth(None)
				self.on_connect_auth = None
				return
		if not self.connected: # We went offline during connecting process
			if self.on_connect_auth:
				self.on_connect_auth(None)
				self.on_connect_auth = None
				return
		if hasattr(con, 'Resource'):
			self.server_resource = con.Resource
		if auth:
			self.last_io = gajim.idlequeue.current_time()
			self.connected = 2
			if self.on_connect_auth:
				self.on_connect_auth(con)
				self.on_connect_auth = None
		else:
			# Forget password if needed
			if not gajim.config.get_per('accounts', self.name, 'savepass'):
				self.password = None
			gajim.log.debug("Couldn't authenticate to %s" % self._hostname)
			self.connected = 0
			self.dispatch('STATUS', 'offline')
			self.dispatch('ERROR', (_('Authentication failed with "%s"') % self._hostname,
				_('Please check your login and password for correctness.')))
			if self.on_connect_auth:
				self.on_connect_auth(None)
				self.on_connect_auth = None
	# END connect

	def quit(self, kill_core):
		if kill_core:
			if self.connected > 1:
				self.connected = 0
				self.connection.disconnect()
				self.time_to_reconnect = None
			return

	def build_privacy_rule(self, name, action):
		'''Build a Privacy rule stanza for invisibility'''
		iq = common.xmpp.Iq('set', common.xmpp.NS_PRIVACY, xmlns = '')
		l = iq.getTag('query').setTag('list', {'name': name})
		i = l.setTag('item', {'action': action, 'order': '1'})
		i.setTag('presence-out')
		return iq

	def activate_privacy_rule(self, name):
		'''activate a privacy rule'''
		iq = common.xmpp.Iq('set', common.xmpp.NS_PRIVACY, xmlns = '')
		iq.getTag('query').setTag('active', {'name': name})
		self.connection.send(iq)

	def send_invisible_presence(self, msg, signed, initial = False):
		# try to set the privacy rule
		iq = self.build_privacy_rule('invisible', 'deny')
		self.connection.SendAndCallForResponse(iq, self._continue_invisible,
			{'msg': msg, 'signed': signed, 'initial': initial})

	def _continue_invisible(self, con, iq_obj, msg, signed, initial):
		ptype = ''
		show = ''
		# FIXME: JEP 126 need some modifications (see http://lists.jabber.ru/pipermail/ejabberd/2005-July/001252.html). So I disable it for the moment
		if 1 or iq_obj.getType() == 'error': #server doesn't support privacy lists
			# We use the old way which is not xmpp complient
			ptype = 'invisible'
			show = 'invisible'
		else:
			# active the privacy rule
			self.privacy_rules_supported = True
			self.activate_privacy_rule('invisible')
		prio = unicode(gajim.config.get_per('accounts', self.name, 'priority'))
		p = common.xmpp.Presence(typ = ptype, priority = prio, show = show)
		p = self.add_sha(p)
		if msg:
			p.setStatus(msg)
		if signed:
			p.setTag(common.xmpp.NS_SIGNED + ' x').setData(signed)
		self.connection.send(p)
		self.dispatch('STATUS', 'invisible')
		if initial:
			#ask our VCard
			self.request_vcard(None)

			#Get bookmarks from private namespace
			self.get_bookmarks()

			#Inform GUI we just signed in
			self.dispatch('SIGNED_IN', ())

	def test_gpg_passphrase(self, password):
		self.gpg.passphrase = password
		keyID = gajim.config.get_per('accounts', self.name, 'keyid')
		signed = self.gpg.sign('test', keyID)
		self.gpg.password = None
		return signed != 'BAD_PASSPHRASE'

	def get_signed_msg(self, msg):
		signed = ''
		keyID = gajim.config.get_per('accounts', self.name, 'keyid')
		if keyID and USE_GPG:
			use_gpg_agent = gajim.config.get('use_gpg_agent')
			if self.connected < 2 and self.gpg.passphrase is None and \
				not use_gpg_agent:
				# We didn't set a passphrase
				self.dispatch('ERROR', (_('OpenPGP passphrase was not given'),
					#%s is the account name here
					_('You will be connected to %s without OpenPGP.') % self.name))
			elif self.gpg.passphrase is not None or use_gpg_agent:
				signed = self.gpg.sign(msg, keyID)
				if signed == 'BAD_PASSPHRASE':
					signed = ''
					if self.connected < 2:
						self.dispatch('BAD_PASSPHRASE', ())
		return signed

	def connect_and_auth(self):
		self.on_connect_success = self._connect_success
		self.connect()

	def connect_and_init(self, show, msg, signed):
		self.continue_connect_info = [show, msg, signed]
		self.on_connect_auth = self._init_roster
		self.connect_and_auth()

	def _init_roster(self, con):
		self.connection = con
		if self.connection:
			con.set_send_timeout(self.keepalives, self.send_keepalive)
			self.connection.onreceive(None)
			# Ask meta_contacts before roster
			self.get_meta_contacts()

	def change_status(self, show, msg, sync = False, auto = False):
		if not show in STATUS_LIST:
			return -1
		sshow = helpers.get_xmpp_show(show)
		if not msg:
			msg = ''
		keyID = gajim.config.get_per('accounts', self.name, 'keyid')
		if keyID and USE_GPG and not msg:
			lowered_uf_status_msg = helpers.get_uf_show(show).lower()
			# do not show I'm invisible!
			if lowered_uf_status_msg == _('invisible'):
				lowered_uf_status_msg = _('offline')
			msg = _("I'm %s") % lowered_uf_status_msg
		signed = ''
		if not auto and not show == 'offline':
			signed = self.get_signed_msg(msg)
		self.status = msg
		if show != 'offline' and not self.connected:
			self.connect_and_init(show, msg, signed)

		elif show == 'offline' and self.connected:
			self.connected = 0
			if self.connection:
				self.on_purpose = True
				p = common.xmpp.Presence(typ = 'unavailable')
				p = self.add_sha(p)
				if msg:
					p.setStatus(msg)
				self.remove_all_transfers()
				self.time_to_reconnect = None
				self.connection.start_disconnect(p, self._on_disconnected)
			else:
				self.time_to_reconnect = None
				self._on_disconnected()

		elif show != 'offline' and self.connected:
			# dont'try to connect, when we are in state 'connecting'
			if self.connected == 1:
				return
			was_invisible = self.connected == STATUS_LIST.index('invisible')
			self.connected = STATUS_LIST.index(show)
			if show == 'invisible':
				self.send_invisible_presence(msg, signed)
				return
			if was_invisible and self.privacy_rules_supported:
				iq = self.build_privacy_rule('visible', 'allow')
				self.connection.send(iq)
				self.activate_privacy_rule('visible')
			prio = unicode(gajim.config.get_per('accounts', self.name,
				'priority'))
			p = common.xmpp.Presence(typ = None, priority = prio, show = sshow)
			p = self.add_sha(p)
			if msg:
				p.setStatus(msg)
			if signed:
				p.setTag(common.xmpp.NS_SIGNED + ' x').setData(signed)
			if self.connection:
				self.connection.send(p)
			self.dispatch('STATUS', show)

	def _on_disconnected(self):
		''' called when a disconnect request has completed successfully'''
		self.dispatch('STATUS', 'offline')
		gajim.proxy65_manager.disconnect(self.connection)
		self.connection = None

	def get_status(self):
		return STATUS_LIST[self.connected]

	def send_motd(self, jid, subject = '', msg = ''):
		if not self.connection:
			return
		msg_iq = common.xmpp.Message(to = jid, body = msg, subject = subject)
		self.connection.send(msg_iq)

	def send_message(self, jid, msg, keyID, type = 'chat', subject='',
	chatstate = None, msg_id = None, composing_jep = None, resource = None):
		if not self.connection:
			return
		if not msg and chatstate is None:
			return
		fjid = jid
		if resource:
			fjid += '/' + resource
		msgtxt = msg
		msgenc = ''
		if keyID and USE_GPG:
			#encrypt
			msgenc = self.gpg.encrypt(msg, [keyID])
			if msgenc:
				msgtxt = '[This message is encrypted]'
				lang = os.getenv('LANG')
				if lang is not None or lang != 'en': # we're not english
					msgtxt = _('[This message is encrypted]') +\
						' ([This message is encrypted])' # one  in locale and one en
		if type == 'chat':
			msg_iq = common.xmpp.Message(to = fjid, body = msgtxt, typ = type)
		else:
			if subject:
				msg_iq = common.xmpp.Message(to = fjid, body = msgtxt,
					typ = 'normal', subject = subject)
			else:
				msg_iq = common.xmpp.Message(to = fjid, body = msgtxt,
					typ = 'normal')
		if msgenc:
			msg_iq.setTag(common.xmpp.NS_ENCRYPTED + ' x').setData(msgenc)

		# chatstates - if peer supports jep85 or jep22, send chatstates
		# please note that the only valid tag inside a message containing a <body>
		# tag is the active event
		if chatstate is not None:
			if composing_jep == 'JEP-0085' or not composing_jep:
				# JEP-0085
				msg_iq.setTag(chatstate, namespace = common.xmpp.NS_CHATSTATES)
			if composing_jep == 'JEP-0022' or not composing_jep:
				# JEP-0022
				chatstate_node = msg_iq.setTag('x', namespace = common.xmpp.NS_EVENT)
				if not msgtxt: # when no <body>, add <id>
					if not msg_id: # avoid putting 'None' in <id> tag
						msg_id = ''
					chatstate_node.setTagData('id', msg_id)
				# when msgtxt, requests JEP-0022 composing notification
				if chatstate is 'composing' or msgtxt: 
					chatstate_node.addChild(name = 'composing') 

		self.connection.send(msg_iq)
		no_log_for = gajim.config.get_per('accounts', self.name, 'no_log_for')
		ji = gajim.get_jid_without_resource(jid)
		if self.name not in no_log_for and ji not in no_log_for:
			log_msg = msg
			if subject:
				log_msg = _('Subject: %s\n%s') % (subject, msg)
			if log_msg:
				if type == 'chat':
					kind = 'chat_msg_sent'
				else:
					kind = 'single_msg_sent'
				gajim.logger.write(kind, jid, log_msg)
		self.dispatch('MSGSENT', (jid, msg, keyID))
	
	def send_stanza(self, stanza):
		''' send a stanza untouched '''
		if not self.connection:
			return
		self.connection.send(stanza)
	
	def ack_subscribed(self, jid):
		if not self.connection:
			return
		gajim.log.debug('ack\'ing subscription complete for %s' % jid)
		p = common.xmpp.Presence(jid, 'subscribe')
		self.connection.send(p)

	def ack_unsubscribed(self, jid):
		if not self.connection:
			return
		gajim.log.debug('ack\'ing unsubscription complete for %s' % jid)
		p = common.xmpp.Presence(jid, 'unsubscribe')
		self.connection.send(p)

	def request_subscription(self, jid, msg, name = '', groups = [],
	auto_auth = False):
		if not self.connection:
			return
		gajim.log.debug('subscription request for %s' % jid)
		if auto_auth:
			self.jids_for_auto_auth.append(jid)
		# RFC 3921 section 8.2
		infos = {'jid': jid}
		if name:
			infos['name'] = name
		iq = common.xmpp.Iq('set', common.xmpp.NS_ROSTER)
		q = iq.getTag('query')
		item = q.addChild('item', attrs = infos)
		for g in groups:
			item.addChild('group').setData(g)
		self.connection.send(iq)

		p = common.xmpp.Presence(jid, 'subscribe')
		p = self.add_sha(p)
		if not msg:
			msg = _('I would like to add you to my roster.')
		p.setStatus(msg)
		self.connection.send(p)

	def send_authorization(self, jid):
		if not self.connection:
			return
		p = common.xmpp.Presence(jid, 'subscribed')
		p = self.add_sha(p)
		self.connection.send(p)

	def refuse_authorization(self, jid):
		if not self.connection:
			return
		p = common.xmpp.Presence(jid, 'unsubscribed')
		p = self.add_sha(p)
		self.connection.send(p)

	def unsubscribe(self, jid, remove_auth = True):
		if not self.connection:
			return
		if remove_auth:
			self.connection.getRoster().delItem(jid)
		else:
			self.connection.getRoster().Unsubscribe(jid)
			self.update_contact(jid, '', [])

	def _continue_unsubscribe(self, con, iq_obj, agent):
		if iq_obj.getTag('error'):
			# error, probably not a real agent
			return
		self.connection.getRoster().delItem(agent)

	def unsubscribe_agent(self, agent):
		if not self.connection:
			return
		iq = common.xmpp.Iq('set', common.xmpp.NS_REGISTER, to = agent)
		iq.getTag('query').setTag('remove')
		self.connection.SendAndCallForResponse(iq, self._continue_unsubscribe,
			{'agent': agent})
		return

	def update_contact(self, jid, name, groups):
		'''update roster item on jabber server'''
		if self.connection:
			self.connection.getRoster().setItem(jid = jid, name = name,
				groups = groups)
	
	def new_account(self, name, config, sync = False):
		# If a connection already exist we cannot create a new account
		if self.connection:
			return
		self._hostname = config['hostname']
		self.new_account_info = config
		self.name = name
		self.on_connect_success = self._on_new_account
		self.connect(config)

	def _on_new_account(self,con, con_type):
		if not con_type:
			self.dispatch('ACC_NOT_OK',
				(_('Could not connect to "%s"') % self._hostname))
			return
		self.connection = con
		common.xmpp.features_nb.getRegInfo(con, self._hostname)

	def account_changed(self, new_name):
		self.name = new_name

	def request_last_status_time(self, jid, resource):
		if not self.connection:
			return
		to_whom_jid = jid
		if resource:
			to_whom_jid += '/' + resource
		iq = common.xmpp.Iq(to = to_whom_jid, typ = 'get', queryNS =\
			common.xmpp.NS_LAST)
		self.connection.send(iq)

	def request_os_info(self, jid, resource):
		if not self.connection:
			return
		to_whom_jid = jid
		if resource:
			to_whom_jid += '/' + resource
		iq = common.xmpp.Iq(to = to_whom_jid, typ = 'get', queryNS =\
			common.xmpp.NS_VERSION)
		self.connection.send(iq)

	def get_settings(self):
		''' Get Gajim settings as described in JEP 0049 '''
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ='get')
		iq2 = iq.addChild(name='query', namespace='jabber:iq:private')
		iq3 = iq2.addChild(name='gajim', namespace='gajim:prefs')
		self.connection.send(iq)

	def get_bookmarks(self):
		'''Get Bookmarks from storage as described in JEP 0048'''
		self.bookmarks = [] #avoid multiple bookmarks when re-connecting
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ='get')
		iq2 = iq.addChild(name='query', namespace='jabber:iq:private')
		iq2.addChild(name='storage', namespace='storage:bookmarks')
		self.connection.send(iq)

	def store_bookmarks(self):
		''' Send bookmarks to the storage namespace '''
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ='set')
		iq2 = iq.addChild(name='query', namespace='jabber:iq:private')
		iq3 = iq2.addChild(name='storage', namespace='storage:bookmarks')
		for bm in self.bookmarks:
			iq4 = iq3.addChild(name = "conference")
			iq4.setAttr('jid', bm['jid'])
			iq4.setAttr('autojoin', bm['autojoin'])
			iq4.setAttr('name', bm['name'])
			# Only add optional elements if not empty
			# Note: need to handle both None and '' as empty
			#   thus shouldn't use "is not None"
			if bm['nick']:
				iq5 = iq4.setTagData('nick', bm['nick'])
			if bm['password']:
				iq5 = iq4.setTagData('password', bm['password'])
		self.connection.send(iq)

	def get_meta_contacts(self):
		'''Get meta_contacts list from storage as described in JEP 0049'''
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ='get')
		iq2 = iq.addChild(name='query', namespace='jabber:iq:private')
		iq2.addChild(name='gajim', namespace='gajim:metacontacts')
		self.connection.send(iq)

	def store_meta_contacts(self, children_list):
		''' Send meta contacts to the storage namespace '''
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ='set')
		iq2 = iq.addChild(name='query', namespace='jabber:iq:private')
		iq3 = iq2.addChild(name='gajim', namespace='gajim:metacontacts')
		for parent_jid in children_list:
			parent_tag = iq3.addChild(name='parent', attrs = {'name': parent_jid})
			for child_jid in children_list[parent_jid]:
				parent_tag.addChild(name='child', attrs = {'name': child_jid})
		self.connection.send(iq)

	def send_agent_status(self, agent, ptype):
		if not self.connection:
			return
		p = common.xmpp.Presence(to = agent, typ = ptype)
		p = self.add_sha(p)
		self.connection.send(p)

	def join_gc(self, nick, room, server, password):
		if not self.connection:
			return
		show = helpers.get_xmpp_show(STATUS_LIST[self.connected])
		p = common.xmpp.Presence(to = '%s@%s/%s' % (room, server, nick),
			show = show, status = self.status)
		if gajim.config.get('send_sha_in_gc_presence'):
			p = self.add_sha(p)
		t = p.setTag(common.xmpp.NS_MUC + ' x')
		if password:
			t.setTagData('password', password)
		self.connection.send(p)
		#last date/time in history to avoid duplicate
		# FIXME: This JID needs to be normalized; see #1364
		jid='%s@%s' % (room, server)
		last_log = gajim.logger.get_last_date_that_has_logs(jid)
		if last_log is None:
			last_log = 0
		self.last_history_line[jid]= last_log

	def send_gc_message(self, jid, msg):
		if not self.connection:
			return
		msg_iq = common.xmpp.Message(jid, msg, typ = 'groupchat')
		self.connection.send(msg_iq)
		self.dispatch('MSGSENT', (jid, msg))

	def send_gc_subject(self, jid, subject):
		if not self.connection:
			return
		msg_iq = common.xmpp.Message(jid,typ = 'groupchat', subject = subject)
		self.connection.send(msg_iq)

	def request_gc_config(self, room_jid):
		iq = common.xmpp.Iq(typ = 'get', queryNS = common.xmpp.NS_MUC_OWNER,
			to = room_jid)
		self.connection.send(iq)

	def change_gc_nick(self, room_jid, nick):
		if not self.connection:
			return
		p = common.xmpp.Presence(to = '%s/%s' % (room_jid, nick))
		p = self.add_sha(p)
		self.connection.send(p)

	def send_gc_status(self, nick, jid, show, status):
		if not self.connection:
			return
		ptype = None
		if show == 'offline':
			ptype = 'unavailable'
		show = helpers.get_xmpp_show(show)
		p = common.xmpp.Presence(to = '%s/%s' % (jid, nick), typ = ptype,
			show = show, status = status)
		if gajim.config.get('send_sha_in_gc_presence'):
			p = self.add_sha(p)
		# send instantly so when we go offline, status is sent to gc before we
		# disconnect from jabber server
		self.connection.send(p)

	def gc_set_role(self, room_jid, nick, role, reason = ''):
		'''role is for all the life of the room so it's based on nick'''
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ = 'set', to = room_jid, queryNS =\
			common.xmpp.NS_MUC_ADMIN)
		item = iq.getTag('query').setTag('item')
		item.setAttr('nick', nick)
		item.setAttr('role', role)
		if reason:
			item.addChild(name = 'reason', payload = reason)
		self.connection.send(iq)

	def gc_set_affiliation(self, room_jid, jid, affiliation, reason = ''):
		'''affiliation is for all the life of the room so it's based on jid'''
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ = 'set', to = room_jid, queryNS =\
			common.xmpp.NS_MUC_ADMIN)
		item = iq.getTag('query').setTag('item')
		item.setAttr('jid', jid)
		item.setAttr('affiliation', affiliation)
		if reason:
			item.addChild(name = 'reason', payload = reason)
		self.connection.send(iq)

	def send_gc_affiliation_list(self, room_jid, list):
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ = 'set', to = room_jid, queryNS = \
			common.xmpp.NS_MUC_ADMIN)
		item = iq.getTag('query')
		for jid in list:
			item_tag = item.addChild('item', {'jid': jid,
				'affiliation': list[jid]['affiliation']})
			if list[jid].has_key('reason') and list[jid]['reason']:
				item_tag.setTagData('reason', list[jid]['reason'])
		self.connection.send(iq)

	def get_affiliation_list(self, room_jid, affiliation):
		if not self.connection:
			return
		iq = common.xmpp.Iq(typ = 'get', to = room_jid, queryNS = \
			common.xmpp.NS_MUC_ADMIN)
		item = iq.getTag('query').setTag('item')
		item.setAttr('affiliation', affiliation)
		self.connection.send(iq)

	def send_gc_config(self, room_jid, config):
		iq = common.xmpp.Iq(typ = 'set', to = room_jid, queryNS =\
			common.xmpp.NS_MUC_OWNER)
		query = iq.getTag('query')
		self.build_data_from_dict(query, config)
		self.connection.send(iq)

	def gpg_passphrase(self, passphrase):
		if USE_GPG:
			use_gpg_agent = gajim.config.get('use_gpg_agent')
			if use_gpg_agent:
				self.gpg.passphrase = None
			else:
				self.gpg.passphrase = passphrase

	def ask_gpg_keys(self):
		if USE_GPG:
			keys = self.gpg.get_keys()
			return keys
		return None

	def ask_gpg_secrete_keys(self):
		if USE_GPG:
			keys = self.gpg.get_secret_keys()
			return keys
		return None

	def change_password(self, password):
		if not self.connection:
			return
		hostname = gajim.config.get_per('accounts', self.name, 'hostname')
		username = gajim.config.get_per('accounts', self.name, 'name')
		iq = common.xmpp.Iq(typ = 'set', to = hostname)
		q = iq.setTag(common.xmpp.NS_REGISTER + ' query')
		q.setTagData('username',username)
		q.setTagData('password',password)
		self.connection.send(iq)

	def unregister_account(self, on_remove_success):
		# no need to write this as a class method and keep the value of on_remove_success
		# as a class property as pass it as an argument
		def _on_unregister_account_connect(con):
			self.on_connect_auth = None
			if self.connected > 1:
				hostname = gajim.config.get_per('accounts', self.name, 'hostname')
				iq = common.xmpp.Iq(typ = 'set', to = hostname)
				q = iq.setTag(common.xmpp.NS_REGISTER + ' query').setTag('remove')
				con.send(iq)
				on_remove_success(True)
				return
			on_remove_success(False)
		if self.connected == 0:
			self.on_connect_auth = _on_unregister_account_connect
			self.connect_and_auth()
		else:
			_on_unregister_account_connect(self.connection)

	def send_invite(self, room, to, reason=''):
		'''sends invitation'''
		message=common.xmpp.Message(to = room)
		c = message.addChild(name = 'x', namespace = common.xmpp.NS_MUC_USER)
		c = c.addChild(name = 'invite', attrs={'to' : to})
		if reason != '':
			c.setTagData('reason', reason)
		self.connection.send(message)

	def send_keepalive(self):
		# nothing received for the last foo seconds (60 secs by default)
		if self.connection:
			self.connection.send(' ')

	def _reconnect_alarm(self):
		if self.time_to_reconnect:
			if self.connected < 2:
				self._reconnect()
			else:
				self.time_to_reconnect = None

# END Connection