# -*- coding:utf-8 -*-
## src/common/connection_handlers.py
##
## Copyright (C) 2006 Dimitur Kirov <dkirov AT gmail.com>
##                    Junglecow J <junglecow AT gmail.com>
## Copyright (C) 2006-2007 Tomasz Melcer <liori AT exroot.org>
##                         Travis Shirk <travis AT pobox.com>
##                         Nikos Kouremenos <kourem AT gmail.com>
## Copyright (C) 2006-2014 Yann Leboulanger <asterix AT lagaule.org>
## Copyright (C) 2007 Julien Pivotto <roidelapluie AT gmail.com>
## Copyright (C) 2007-2008 Brendan Taylor <whateley AT gmail.com>
##                         Jean-Marie Traissard <jim AT lapin.org>
##                         Stephan Erb <steve-e AT h3c.de>
## Copyright (C) 2008 Jonathan Schleifer <js-gajim AT webkeks.org>
##
## This file is part of Gajim.
##
## Gajim 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 3 only.
##
## Gajim 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.
##
## You should have received a copy of the GNU General Public License
## along with Gajim. If not, see <http://www.gnu.org/licenses/>.
##

import os
import base64
import binascii
import operator
import hashlib

from time import (altzone, daylight, gmtime, localtime, strftime,
        time as time_time, timezone, tzname)

from gi.repository import GLib

import nbxmpp
from gajim.common import caps_cache as capscache

from gajim.common import helpers
from gajim.common import app
from gajim.common import dataforms
from gajim.common import jingle_xtls
from gajim.common import configpaths
from gajim.common.caps_cache import muc_caps_cache
from gajim.common.commands import ConnectionCommands
from gajim.common.protocol.caps import ConnectionCaps
from gajim.common.protocol.bytestream import ConnectionSocks5Bytestream
from gajim.common.protocol.bytestream import ConnectionIBBytestream
from gajim.common.message_archiving import ConnectionArchive313
from gajim.common.httpupload import ConnectionHTTPUpload
from gajim.common.connection_handlers_events import *

from gajim.common import ged
from gajim.common import nec
from gajim.common.nec import NetworkEvent
from gajim.common.const import KindConstant

from gajim.common.jingle import ConnectionJingle

import logging
log = logging.getLogger('gajim.c.connection_handlers')

# kind of events we can wait for an answer
AGENT_REMOVED = 'agent_removed'
METACONTACTS_ARRIVED = 'metacontacts_arrived'
ROSTER_ARRIVED = 'roster_arrived'
DELIMITER_ARRIVED = 'delimiter_arrived'
PRIVACY_ARRIVED = 'privacy_arrived'
PEP_CONFIG = 'pep_config'


class ConnectionDisco:
    """
    Holds xmpppy handlers and public methods for discover services
    """

    def discoverItems(self, jid, node=None, id_prefix=None):
        """
        According to XEP-0030:
            jid is mandatory;
            name, node, action is optional.
        """
        id_ = self._discover(nbxmpp.NS_DISCO_ITEMS, jid, node, id_prefix)
        self.disco_items_ids.append(id_)

    def discoverInfo(self, jid, node=None, id_prefix=None):
        """
        According to XEP-0030:
            For identity: category, type is mandatory, name is optional.
            For feature: var is mandatory.
        """
        id_ = self._discover(nbxmpp.NS_DISCO_INFO, jid, node, id_prefix)
        self.disco_info_ids.append(id_)

    def discoverMUC(self, jid, callback, update=False):
        if muc_caps_cache.is_cached(jid) and not update:
            callback()
            return
        disco_info = nbxmpp.Iq(typ='get', to=jid, queryNS=nbxmpp.NS_DISCO_INFO)
        self.connection.SendAndCallForResponse(
            disco_info, self.received_muc_info, {'callback': callback})

    def received_muc_info(self, conn, stanza, callback):
        if nbxmpp.isResultNode(stanza):
            app.log('gajim.muc').info(
                'Received MUC DiscoInfo for %s', stanza.getFrom())
            muc_caps_cache.append(stanza)
            callback()
        else:
            error = stanza.getError()
            if error == 'item-not-found':
                # Groupchat does not exist
                callback()
                return
            app.nec.push_incoming_event(
                InformationEvent(
                    None, dialog_name='unable-join-groupchat', args=error))

    def request_register_agent_info(self, agent):
        if not self.connection or self.connected < 2:
            return None
        iq = nbxmpp.Iq('get', nbxmpp.NS_REGISTER, to=agent)
        id_ = self.connection.getAnID()
        iq.setID(id_)
        # Wait the answer during 30 secondes
        self.awaiting_timeouts[app.idlequeue.current_time() + 30] = (id_,
            _('Registration information for transport %s has not arrived in '
            'time') % agent)
        self.connection.SendAndCallForResponse(iq, self._ReceivedRegInfo,
            {'agent': agent})

    def _agent_registered_cb(self, con, resp, agent):
        if resp.getType() == 'result':
            app.nec.push_incoming_event(InformationEvent(
                None, dialog_name='agent-register-success', args=agent))
            self.request_subscription(agent, auto_auth=True)
            self.agent_registrations[agent]['roster_push'] = True
            if self.agent_registrations[agent]['sub_received']:
                p = nbxmpp.Presence(agent, 'subscribed')
                p = self.add_sha(p)
                self.connection.send(p)
        if resp.getType() == 'error':
            app.nec.push_incoming_event(InformationEvent(
                None, dialog_name='agent-register-error', 
                kwargs={'agent': agent,
                        'error': resp.getError(),
                        'error_msg': resp.getErrorMsg()}))

    def register_agent(self, agent, info, is_form=False):
        if not self.connection or self.connected < 2:
            return
        if is_form:
            iq = nbxmpp.Iq('set', nbxmpp.NS_REGISTER, to=agent)
            query = iq.setQuery()
            info.setAttr('type', 'submit')
            query.addChild(node=info)
            self.connection.SendAndCallForResponse(iq,
                self._agent_registered_cb, {'agent': agent})
        else:
            # fixed: blocking
            nbxmpp.features_nb.register(self.connection, agent, info,
                self._agent_registered_cb, {'agent': agent})
        self.agent_registrations[agent] = {'roster_push': False,
            'sub_received': False}

    def _discover(self, ns, jid, node=None, id_prefix=None):
        if not self.connection or self.connected < 2:
            return
        iq = nbxmpp.Iq(typ='get', to=jid, queryNS=ns)
        id_ = self.connection.getAnID()
        if id_prefix:
            id_ = id_prefix + id_
        iq.setID(id_)
        if node:
            iq.setQuerynode(node)
        self.connection.send(iq)
        return id_

    def _ReceivedRegInfo(self, con, resp, agent):
        nbxmpp.features_nb._ReceivedRegInfo(con, resp, agent)
        self._IqCB(con, resp)

    def _discoGetCB(self, con, iq_obj):
        """
        Get disco info
        """
        if not self.connection or self.connected < 2:
            return
        frm = helpers.get_full_jid_from_iq(iq_obj)
        to = iq_obj.getAttr('to')
        id_ = iq_obj.getAttr('id')
        iq = nbxmpp.Iq(to=frm, typ='result', queryNS=nbxmpp.NS_DISCO, frm=to)
        iq.setAttr('id', id_)
        query = iq.setTag('query')
        query.setAttr('node', 'http://gajim.org#' + app.version.split('-', 1)[
            0])
        for f in (nbxmpp.NS_BYTESTREAM, nbxmpp.NS_SI, nbxmpp.NS_FILE,
        nbxmpp.NS_COMMANDS, nbxmpp.NS_JINGLE_FILE_TRANSFER_5,
        nbxmpp.NS_JINGLE_XTLS, nbxmpp.NS_PUBKEY_PUBKEY, nbxmpp.NS_PUBKEY_REVOKE,
        nbxmpp.NS_PUBKEY_ATTEST):
            feature = nbxmpp.Node('feature')
            feature.setAttr('var', f)
            query.addChild(node=feature)

        self.connection.send(iq)
        raise nbxmpp.NodeProcessed

    def _DiscoverItemsErrorCB(self, con, iq_obj):
        log.debug('DiscoverItemsErrorCB')
        app.nec.push_incoming_event(AgentItemsErrorReceivedEvent(None,
            conn=self, stanza=iq_obj))

    def _DiscoverItemsCB(self, con, iq_obj):
        log.debug('DiscoverItemsCB')
        app.nec.push_incoming_event(AgentItemsReceivedEvent(None, conn=self,
            stanza=iq_obj))

    def _DiscoverItemsGetCB(self, con, iq_obj):
        log.debug('DiscoverItemsGetCB')

        if not self.connection or self.connected < 2:
            return

        if self.commandItemsQuery(con, iq_obj):
            raise nbxmpp.NodeProcessed
        node = iq_obj.getTagAttr('query', 'node')
        if node is None:
            result = iq_obj.buildReply('result')
            self.connection.send(result)
            raise nbxmpp.NodeProcessed
        if node == nbxmpp.NS_COMMANDS:
            self.commandListQuery(con, iq_obj)
            raise nbxmpp.NodeProcessed

    def _DiscoverInfoGetCB(self, con, iq_obj):
        log.debug('DiscoverInfoGetCB')
        if not self.connection or self.connected < 2:
            return
        node = iq_obj.getQuerynode()

        if self.commandInfoQuery(con, iq_obj):
            raise nbxmpp.NodeProcessed

        id_ = iq_obj.getAttr('id')
        if id_[:6] == 'Gajim_':
            # We get this request from echo.server
            raise nbxmpp.NodeProcessed

        iq = iq_obj.buildReply('result')
        q = iq.setQuery()
        if node:
            q.setAttr('node', node)
        q.addChild('identity', attrs=app.gajim_identity)
        client_version = 'http://gajim.org#' + app.caps_hash[self.name]

        if node in (None, client_version):
            for f in app.gajim_common_features:
                q.addChild('feature', attrs={'var': f})
            for f in app.gajim_optional_features[self.name]:
                q.addChild('feature', attrs={'var': f})

        if q.getChildren():
            self.connection.send(iq)
            raise nbxmpp.NodeProcessed

    def _DiscoverInfoErrorCB(self, con, iq_obj):
        log.debug('DiscoverInfoErrorCB')
        app.nec.push_incoming_event(AgentInfoErrorReceivedEvent(None,
            conn=self, stanza=iq_obj))

    def _DiscoverInfoCB(self, con, iq_obj):
        log.debug('DiscoverInfoCB')
        if not self.connection or self.connected < 2:
            return
        app.nec.push_incoming_event(AgentInfoReceivedEvent(None, conn=self,
            stanza=iq_obj))

# basic connection handlers used here and in zeroconf
class ConnectionHandlersBase:
    def __init__(self):
        # List of IDs we are waiting answers for {id: (type_of_request, data), }
        self.awaiting_answers = {}
        # List of IDs that will produce a timeout is answer doesn't arrive
        # {time_of_the_timeout: (id, message to send to gui), }
        self.awaiting_timeouts = {}
        # keep the jids we auto added (transports contacts) to not send the
        # SUBSCRIBED event to gui
        self.automatically_added = []

        # keep track of sessions this connection has with other JIDs
        self.sessions = {}

        # IDs of sent messages (https://trac.gajim.org/ticket/8222)
        self.sent_message_ids = []

        # We decrypt GPG messages one after the other. Keep queue in mem
        self.gpg_messages_to_decrypt = []

        # XEPs that are based on Message
        self._message_namespaces = set([nbxmpp.NS_HTTP_AUTH,
                                        nbxmpp.NS_PUBSUB_EVENT,
                                        nbxmpp.NS_ROSTERX])

        app.ged.register_event_handler('iq-error-received', ged.CORE,
            self._nec_iq_error_received)
        app.ged.register_event_handler('presence-received', ged.CORE,
            self._nec_presence_received)
        app.ged.register_event_handler('message-received', ged.CORE,
            self._nec_message_received)
        app.ged.register_event_handler('mam-message-received', ged.CORE,
            self._nec_message_received)
        app.ged.register_event_handler('mam-gc-message-received', ged.CORE,
            self._nec_message_received)
        app.ged.register_event_handler('decrypted-message-received', ged.CORE,
            self._nec_decrypted_message_received)
        app.ged.register_event_handler('gc-message-received', ged.CORE,
            self._nec_gc_message_received)

    def cleanup(self):
        app.ged.remove_event_handler('iq-error-received', ged.CORE,
            self._nec_iq_error_received)
        app.ged.remove_event_handler('presence-received', ged.CORE,
            self._nec_presence_received)
        app.ged.remove_event_handler('message-received', ged.CORE,
            self._nec_message_received)
        app.ged.remove_event_handler('mam-message-received', ged.CORE,
            self._nec_message_received)
        app.ged.remove_event_handler('mam-gc-message-received', ged.CORE,
            self._nec_message_received)
        app.ged.remove_event_handler('decrypted-message-received', ged.CORE,
            self._nec_decrypted_message_received)
        app.ged.remove_event_handler('gc-message-received', ged.CORE,
            self._nec_gc_message_received)

    def _nec_iq_error_received(self, obj):
        if obj.conn.name != self.name:
            return

    def _nec_presence_received(self, obj):
        account = obj.conn.name
        if account != self.name:
            return
        jid = obj.jid
        resource = obj.resource or ''

        statuss = ['offline', 'error', 'online', 'chat', 'away', 'xa', 'dnd',
            'invisible']
        obj.old_show = 0
        obj.new_show = statuss.index(obj.show)

        obj.contact_list = []

        highest = app.contacts.get_contact_with_highest_priority(account, jid)
        obj.was_highest = (highest and highest.resource == resource)

        # Update contact
        obj.contact_list = app.contacts.get_contacts(account, jid)
        obj.contact = None
        resources = []
        for c in obj.contact_list:
            resources.append(c.resource)
            if c.resource == resource:
                obj.contact = c
                break

        if obj.contact:
            if obj.contact.show in statuss:
                obj.old_show = statuss.index(obj.contact.show)
            # nick changed
            if obj.contact_nickname is not None and \
            obj.contact.contact_name != obj.contact_nickname:
                obj.contact.contact_name = obj.contact_nickname
                obj.need_redraw = True

            elif obj.old_show != obj.new_show or obj.contact.status != \
            obj.status:
                obj.need_redraw = True
        else:
            obj.contact = app.contacts.get_first_contact_from_jid(account,
                jid)
            if not obj.contact:
                # Presence of another resource of our jid
                # Create self contact and add to roster
                if resource == obj.conn.server_resource:
                    return
                # Ignore offline presence of unknown self resource
                if obj.new_show < 2:
                    return
                obj.contact = app.contacts.create_self_contact(jid=jid,
                    account=account, show=obj.show, status=obj.status,
                    priority=obj.prio, keyID=obj.keyID,
                    resource=obj.resource)
                app.contacts.add_contact(account, obj.contact)
                obj.contact_list.append(obj.contact)
            elif obj.contact.show in statuss:
                obj.old_show = statuss.index(obj.contact.show)
            if (resources != [''] and (len(obj.contact_list) != 1 or \
            obj.contact_list[0].show not in ('not in roster', 'offline'))) and \
            not app.jid_is_transport(jid):
                # Another resource of an existing contact connected
                obj.old_show = 0
                obj.contact = app.contacts.copy_contact(obj.contact)
                obj.contact_list.append(obj.contact)
            obj.contact.resource = resource

            obj.need_add_in_roster = True

        if not app.jid_is_transport(jid) and len(obj.contact_list) == 1:
            # It's not an agent
            if obj.old_show == 0 and obj.new_show > 1:
                if not jid in app.newly_added[account]:
                    app.newly_added[account].append(jid)
                if jid in app.to_be_removed[account]:
                    app.to_be_removed[account].remove(jid)
            elif obj.old_show > 1 and obj.new_show == 0 and \
            obj.conn.connected > 1:
                if not jid in app.to_be_removed[account]:
                    app.to_be_removed[account].append(jid)
                if jid in app.newly_added[account]:
                    app.newly_added[account].remove(jid)
                obj.need_redraw = True

        obj.contact.show = obj.show
        obj.contact.status = obj.status
        obj.contact.priority = obj.prio
        attached_keys = app.config.get_per('accounts', account,
            'attached_gpg_keys').split()
        if jid in attached_keys:
            obj.contact.keyID = attached_keys[attached_keys.index(jid) + 1]
        else:
            # Do not override assigned key
            obj.contact.keyID = obj.keyID
        obj.contact.contact_nickname = obj.contact_nickname
        obj.contact.idle_time = obj.idle_time

        if app.jid_is_transport(jid):
            return

        # It isn't an agent
        # reset chatstate if needed:
        # (when contact signs out or has errors)
        if obj.show in ('offline', 'error'):
            obj.contact.our_chatstate = obj.contact.chatstate = None

            # TODO: This causes problems when another
            # resource signs off!
            self.stop_all_active_file_transfers(obj.contact)

        if app.config.get('log_contact_status_changes') and \
        app.config.should_log(self.name, obj.jid):
            show = app.logger.convert_show_values_to_db_api_values(obj.show)
            if show is not None:
                app.logger.insert_into_logs(self.name,
                                            nbxmpp.JID(obj.jid).getStripped(),
                                            time_time(),
                                            KindConstant.STATUS,
                                            message=obj.status,
                                            show=show)

    def _nec_message_received(self, obj):
        if obj.conn.name != self.name:
            return

        app.plugin_manager.extension_point(
            'decrypt', self, obj, self._on_message_received)
        if not obj.encrypted:
            # XEP-0380
            enc_tag = obj.stanza.getTag('encryption', namespace=nbxmpp.NS_EME)
            if enc_tag:
                ns = enc_tag.getAttr('namespace')
                if ns:
                    if ns == 'urn:xmpp:otr:0':
                        obj.msgtxt = _('This message was encrypted with OTR '
                        'and could not be decrypted.')
                    elif ns == 'jabber:x:encrypted':
                        obj.msgtxt = _('This message was encrypted with Legacy '
                        'OpenPGP and could not be decrypted. You can install '
                        'the PGP plugin to handle those messages.')
                    elif ns == 'urn:xmpp:openpgp:0':
                        obj.msgtxt = _('This message was encrypted with '
                        'OpenPGP for XMPP and could not be decrypted.')
                    else:
                        enc_name = enc_tag.getAttr('name')
                        if not enc_name:
                            enc_name = ns
                        obj.msgtxt = _('This message was encrypted with %s '
                        'and could not be decrypted.') % enc_name
            self._on_message_received(obj)

    def _on_message_received(self, obj):
        if isinstance(obj, MessageReceivedEvent):
            app.nec.push_incoming_event(
                DecryptedMessageReceivedEvent(
                    None, conn=self, msg_obj=obj, stanza_id=obj.unique_id))
        else:
            app.nec.push_incoming_event(
                MamDecryptedMessageReceivedEvent(None, **vars(obj)))

    def _nec_decrypted_message_received(self, obj):
        if obj.conn.name != self.name:
            return

        # Receipt requested
        # TODO: We shouldn't answer if we're invisible!
        contact = app.contacts.get_contact(self.name, obj.jid)
        nick = obj.resource
        gc_contact = app.contacts.get_gc_contact(self.name, obj.jid, nick)
        if obj.sent:
            jid_to = obj.stanza.getFrom()
        else:
            jid_to = obj.stanza.getTo()
        reply = False
        if not jid_to:
            reply = True
        else:
            fjid_to = str(jid_to)
            if self.name != 'Local':
                # Dont check precis for zeroconf
                fjid_to = helpers.parse_jid(str(jid_to))
            jid_to = app.get_jid_without_resource(fjid_to)
            if jid_to == app.get_jid_from_account(self.name):
                reply = True

        if obj.jid != app.get_jid_from_account(self.name):
            if obj.receipt_request_tag and app.config.get_per('accounts',
            self.name, 'answer_receipts') and ((contact and contact.sub \
            not in ('to', 'none')) or gc_contact) and obj.mtype != 'error' and \
            reply:
                receipt = nbxmpp.Message(to=obj.fjid, typ='chat')
                receipt.setTag('received', namespace='urn:xmpp:receipts',
                    attrs={'id': obj.id_})

                if obj.thread_id:
                    receipt.setThread(obj.thread_id)
                self.connection.send(receipt)

        # We got our message's receipt
        if obj.receipt_received_tag and app.config.get_per('accounts',
        self.name, 'request_receipt'):
            ctrl = obj.session.control
            if not ctrl:
                # Received <message> doesn't have the <thread> element
                # or control is not bound to session?
                # --> search for it
                ctrl = app.interface.msg_win_mgr.search_control(obj.jid,
                    obj.conn.name, obj.resource)
            
            if ctrl:
                id_ = obj.receipt_received_tag.getAttr('id')
                if not id_:
                    # old XEP implementation
                    id_ = obj.id_
                ctrl.conv_textview.show_xep0184_ack(id_)

        if obj.mtype == 'error':
            if not obj.msgtxt:
                obj.msgtxt = _('message')
            self.dispatch_error_message(obj.stanza, obj.msgtxt,
                obj.session, obj.fjid, obj.timestamp)
            return True
        elif obj.mtype == 'groupchat':
            app.nec.push_incoming_event(GcMessageReceivedEvent(None,
                conn=self, msg_obj=obj, stanza_id=obj.unique_id))
            return True

    def _check_for_mam_compliance(self, room_jid, stanza_id):
        namespace = muc_caps_cache.get_mam_namespace(room_jid)
        if stanza_id is None and namespace == nbxmpp.NS_MAM_2:
            helpers.add_to_mam_blacklist(room_jid)

    def _nec_gc_message_received(self, obj):
        if obj.conn.name != self.name:
            return

        self._check_for_mam_compliance(obj.jid, obj.unique_id)

        if (app.config.should_log(obj.conn.name, obj.jid) and
                obj.msgtxt and obj.nick):
            # if not obj.nick, it means message comes from room itself
            # usually it hold description and can be send at each connection
            # so don't store it in logs
            app.logger.insert_into_logs(self.name,
                                        obj.jid,
                                        obj.timestamp,
                                        KindConstant.GC_MSG,
                                        message=obj.msgtxt,
                                        contact_name=obj.nick,
                                        additional_data=obj.additional_data,
                                        stanza_id=obj.unique_id)
            app.logger.set_room_last_message_time(obj.room_jid, obj.timestamp)

    # process and dispatch an error message
    def dispatch_error_message(self, msg, msgtxt, session, frm, tim):
        error_msg = msg.getErrorMsg()

        if not error_msg:
            error_msg = msgtxt
            msgtxt = None

        subject = msg.getSubject()

        if session.is_loggable():
            app.logger.insert_into_logs(self.name,
                                        nbxmpp.JID(frm).getStripped(),
                                        tim,
                                        KindConstant.ERROR,
                                        message=error_msg,
                                        subject=subject)

        app.nec.push_incoming_event(MessageErrorEvent(None, conn=self,
            fjid=frm, error_code=msg.getErrorCode(), error_msg=error_msg,
            msg=msgtxt, time_=tim, session=session, stanza=msg))

    def get_sessions(self, jid):
        """
        Get all sessions for the given full jid
        """
        if not app.interface.is_pm_contact(jid, self.name):
            jid = app.get_jid_without_resource(jid)

        try:
            return list(self.sessions[jid].values())
        except KeyError:
            return []

    def get_or_create_session(self, fjid, thread_id):
        """
        Return an existing session between this connection and 'jid', returns a
        new one if none exist
        """
        pm = True
        jid = fjid

        if not app.interface.is_pm_contact(fjid, self.name):
            pm = False
            jid = app.get_jid_without_resource(fjid)

        session = self.find_session(jid, thread_id)

        if session:
            return session

        if pm:
            return self.make_new_session(fjid, thread_id, type_='pm')
        else:
            return self.make_new_session(fjid, thread_id)

    def find_session(self, jid, thread_id):
        try:
            if not thread_id:
                return self.find_null_session(jid)
            else:
                return self.sessions[jid][thread_id]
        except KeyError:
            return None

    def terminate_sessions(self):
        self.sessions = {}

    def delete_session(self, jid, thread_id):
        if not jid in self.sessions:
            jid = app.get_jid_without_resource(jid)
        if not jid in self.sessions:
            return

        del self.sessions[jid][thread_id]

        if not self.sessions[jid]:
            del self.sessions[jid]

    def find_null_session(self, jid):
        """
        Find all of the sessions between us and a remote jid in which we haven't
        received a thread_id yet and returns the session that we last sent a
        message to
        """
        sessions = list(self.sessions[jid].values())

        # sessions that we haven't received a thread ID in
        idless = [s for s in sessions if not s.received_thread_id]

        # filter out everything except the default session type
        chat_sessions = [s for s in idless if isinstance(s,
            app.default_session_type)]

        if chat_sessions:
            # return the session that we last sent a message in
            return sorted(chat_sessions, key=operator.attrgetter('last_send'))[
                -1]
        else:
            return None

    def get_latest_session(self, jid):
        """
        Get the session that we last sent a message to
        """
        if jid not in self.sessions:
            return None
        sessions = self.sessions[jid].values()
        if not sessions:
            return None
        return sorted(sessions, key=operator.attrgetter('last_send'))[-1]

    def find_controlless_session(self, jid, resource=None):
        """
        Find an active session that doesn't have a control attached
        """
        try:
            sessions = list(self.sessions[jid].values())

            # filter out everything except the default session type
            chat_sessions = [s for s in sessions if isinstance(s,
                app.default_session_type)]

            orphaned = [s for s in chat_sessions if not s.control]

            if resource:
                orphaned = [s for s in orphaned if s.resource == resource]

            return orphaned[0]
        except (KeyError, IndexError):
            return None

    def make_new_session(self, jid, thread_id=None, type_='chat', cls=None):
        """
        Create and register a new session

        thread_id=None to generate one.
        type_ should be 'chat' or 'pm'.
        """
        if not cls:
            cls = app.default_session_type

        sess = cls(self, nbxmpp.JID(jid), thread_id, type_)

        # determine if this session is a pm session
        # if not, discard the resource so that all sessions are stored bare
        if not type_ == 'pm':
            jid = app.get_jid_without_resource(jid)

        if not jid in self.sessions:
            self.sessions[jid] = {}

        self.sessions[jid][sess.thread_id] = sess

        return sess

class ConnectionHandlers(ConnectionArchive313,
ConnectionSocks5Bytestream, ConnectionDisco,
ConnectionCommands, ConnectionCaps,
ConnectionHandlersBase, ConnectionJingle, ConnectionIBBytestream,
ConnectionHTTPUpload):
    def __init__(self):
        ConnectionArchive313.__init__(self)
        ConnectionSocks5Bytestream.__init__(self)
        ConnectionIBBytestream.__init__(self)
        ConnectionCommands.__init__(self)
        ConnectionHTTPUpload.__init__(self)

        # Handle presences BEFORE caps
        app.nec.register_incoming_event(PresenceReceivedEvent)

        ConnectionCaps.__init__(self, account=self.name,
            capscache=capscache.capscache,
            client_caps_factory=capscache.create_suitable_client_caps)
        ConnectionJingle.__init__(self)
        ConnectionHandlersBase.__init__(self)

        # keep the latest subscribed event for each jid to prevent loop when we
        # acknowledge presences
        self.subscribed_events = {}
        # IDs of disco#items requests
        self.disco_items_ids = []
        # IDs of disco#info requests
        self.disco_info_ids = []

        self.continue_connect_info = None

        self.privacy_default_list = None

        app.nec.register_incoming_event(StreamConflictReceivedEvent)
        app.nec.register_incoming_event(StreamOtherHostReceivedEvent)
        app.nec.register_incoming_event(MessageReceivedEvent)
        app.nec.register_incoming_event(ArchivingErrorReceivedEvent)
        app.nec.register_incoming_event(
            Archiving313PreferencesChangedReceivedEvent)
        app.nec.register_incoming_event(NotificationEvent)

        app.ged.register_event_handler('roster-set-received',
            ged.CORE, self._nec_roster_set_received)
        app.ged.register_event_handler('roster-received', ged.CORE,
            self._nec_roster_received)
        app.ged.register_event_handler('iq-error-received', ged.CORE,
            self._nec_iq_error_received)
        app.ged.register_event_handler('subscribe-presence-received',
            ged.CORE, self._nec_subscribe_presence_received)
        app.ged.register_event_handler('subscribed-presence-received',
            ged.CORE, self._nec_subscribed_presence_received)
        app.ged.register_event_handler('subscribed-presence-received',
            ged.POSTGUI, self._nec_subscribed_presence_received_end)
        app.ged.register_event_handler('unsubscribed-presence-received',
            ged.CORE, self._nec_unsubscribed_presence_received)
        app.ged.register_event_handler('unsubscribed-presence-received',
            ged.POSTGUI, self._nec_unsubscribed_presence_received_end)
        app.ged.register_event_handler('agent-removed', ged.CORE,
            self._nec_agent_removed)
        app.ged.register_event_handler('stream-other-host-received', ged.CORE,
            self._nec_stream_other_host_received)
        app.ged.register_event_handler('blocking', ged.CORE,
            self._nec_blocking)

    def cleanup(self):
        ConnectionHandlersBase.cleanup(self)
        ConnectionCaps.cleanup(self)
        ConnectionArchive313.cleanup(self)
        ConnectionHTTPUpload.cleanup(self)
        app.ged.remove_event_handler('roster-set-received',
            ged.CORE, self._nec_roster_set_received)
        app.ged.remove_event_handler('roster-received', ged.CORE,
            self._nec_roster_received)
        app.ged.remove_event_handler('iq-error-received', ged.CORE,
            self._nec_iq_error_received)
        app.ged.remove_event_handler('subscribe-presence-received',
            ged.CORE, self._nec_subscribe_presence_received)
        app.ged.remove_event_handler('subscribed-presence-received',
            ged.CORE, self._nec_subscribed_presence_received)
        app.ged.remove_event_handler('subscribed-presence-received',
            ged.POSTGUI, self._nec_subscribed_presence_received_end)
        app.ged.remove_event_handler('unsubscribed-presence-received',
            ged.CORE, self._nec_unsubscribed_presence_received)
        app.ged.remove_event_handler('unsubscribed-presence-received',
            ged.POSTGUI, self._nec_unsubscribed_presence_received_end)
        app.ged.remove_event_handler('agent-removed', ged.CORE,
            self._nec_agent_removed)
        app.ged.remove_event_handler('stream-other-host-received', ged.CORE,
            self._nec_stream_other_host_received)
        app.ged.remove_event_handler('blocking', ged.CORE, self._nec_blocking)

    def add_sha(self, p, send_caps=True):
        p = self.get_module('VCardAvatars').add_update_node(p)
        if send_caps:
            return self._add_caps(p)
        return p

    def _add_caps(self, p):
        ''' advertise our capabilities in presence stanza (xep-0115)'''
        c = p.setTag('c', namespace=nbxmpp.NS_CAPS)
        c.setAttr('hash', 'sha-1')
        c.setAttr('node', 'http://gajim.org')
        c.setAttr('ver', app.caps_hash[self.name])
        return p

    def _ErrorCB(self, con, iq_obj):
        log.debug('ErrorCB')
        app.nec.push_incoming_event(IqErrorReceivedEvent(None, conn=self,
            stanza=iq_obj))

    def _IqCB(self, con, iq_obj):
        id_ = iq_obj.getID()

        app.nec.push_incoming_event(NetworkEvent('raw-iq-received',
            conn=self, stanza=iq_obj))

        # Check if we were waiting a timeout for this id
        found_tim = None
        for tim in self.awaiting_timeouts:
            if id_ == self.awaiting_timeouts[tim][0]:
                found_tim = tim
                break
        if found_tim:
            del self.awaiting_timeouts[found_tim]

        if id_ not in self.awaiting_answers:
            return

        if self.awaiting_answers[id_][0] == AGENT_REMOVED:
            jid = self.awaiting_answers[id_][1]
            app.nec.push_incoming_event(AgentRemovedEvent(None, conn=self,
                agent=jid))
            del self.awaiting_answers[id_]
        elif self.awaiting_answers[id_][0] == METACONTACTS_ARRIVED:
            if not self.connection:
                return
            if iq_obj.getType() == 'result':
                app.nec.push_incoming_event(MetacontactsReceivedEvent(None,
                    conn=self, stanza=iq_obj))
            else:
                if iq_obj.getErrorCode() not in ('403', '406', '404'):
                    self.private_storage_supported = False
            self.get_roster_delimiter()
            del self.awaiting_answers[id_]
        elif self.awaiting_answers[id_][0] == DELIMITER_ARRIVED:
            del self.awaiting_answers[id_]
            if not self.connection:
                return
            if iq_obj.getType() == 'result':
                query = iq_obj.getTag('query')
                if not query:
                    return
                delimiter = query.getTagData('roster')
                if delimiter:
                    self.nested_group_delimiter = delimiter
                else:
                    self.set_roster_delimiter('::')
            else:
                self.private_storage_supported = False

            # We can now continue connection by requesting the roster
            self.request_roster()
        elif self.awaiting_answers[id_][0] == ROSTER_ARRIVED:
            if iq_obj.getType() == 'result':
                if not iq_obj.getTag('query'):
                    self._init_roster_from_db()
                self._getRoster()
            elif iq_obj.getType() == 'error':
                self.roster_supported = False
                self.discoverItems(app.config.get_per('accounts', self.name,
                    'hostname'), id_prefix='Gajim_')
                if app.config.get_per('accounts', self.name,
                'use_ft_proxies'):
                    self.discover_ft_proxies()
                app.nec.push_incoming_event(RosterReceivedEvent(None,
                    conn=self))
            GLib.timeout_add_seconds(10, self.discover_servers)
            del self.awaiting_answers[id_]
        elif self.awaiting_answers[id_][0] == PRIVACY_ARRIVED:
            del self.awaiting_answers[id_]
            if iq_obj.getType() != 'error':
                for list_ in iq_obj.getQueryPayload():
                    if list_.getName() == 'default':
                        self.privacy_default_list = list_.getAttr('name')
                        self.get_privacy_list(self.privacy_default_list)
                        break
                # Ask metacontacts before roster
                self.get_metacontacts()
            else:
                # That should never happen, but as it's blocking in the
                # connection process, we don't take the risk
                self.privacy_rules_supported = False
                self._continue_connection_request_privacy()
        elif self.awaiting_answers[id_][0] == PEP_CONFIG:
            del self.awaiting_answers[id_]
            if iq_obj.getType() == 'error':
                return
            if not iq_obj.getTag('pubsub'):
                return
            conf = iq_obj.getTag('pubsub').getTag('configure')
            if not conf:
                return
            node = conf.getAttr('node')
            form_tag = conf.getTag('x', namespace=nbxmpp.NS_DATA)
            if form_tag:
                form = dataforms.ExtendForm(node=form_tag)
                app.nec.push_incoming_event(PEPConfigReceivedEvent(None,
                    conn=self, node=node, form=form))

    def _nec_iq_error_received(self, obj):
        if obj.conn.name != self.name:
            return
        if obj.id_ in self.disco_items_ids:
            app.nec.push_incoming_event(AgentItemsErrorReceivedEvent(None,
                conn=self, stanza=obj.stanza))
            return True
        if obj.id_ in self.disco_info_ids:
            app.nec.push_incoming_event(AgentInfoErrorReceivedEvent(None,
                conn=self, stanza=obj.stanza))
            return True

    def _SecLabelCB(self, con, iq_obj):
        """
        Security Label callback, used for catalogues.
        """
        log.debug('SecLabelCB')
        query = iq_obj.getTag('catalog')
        to = query.getAttr('to')
        items = query.getTags('item')
        labels = {}
        ll = []
        default = None
        for item in items:
            label = item.getAttr('selector')
            labels[label] = item.getTag('securitylabel')
            ll.append(label)
            if item.getAttr('default') == 'true':
                default = label
        if to not in self.seclabel_catalogues:
            self.seclabel_catalogues[to] = [[], None, None, None]
        self.seclabel_catalogues[to][1] = labels
        self.seclabel_catalogues[to][2] = ll
        self.seclabel_catalogues[to][3] = default
        for callback in self.seclabel_catalogues[to][0]:
            callback()
        self.seclabel_catalogues[to][0] = []

    def seclabel_catalogue_request(self, to, callback):
        if to not in self.seclabel_catalogues:
            self.seclabel_catalogues[to] = [[], None, None, None]
        self.seclabel_catalogues[to][0].append(callback)

    def _rosterSetCB(self, con, iq_obj):
        log.debug('rosterSetCB')
        app.nec.push_incoming_event(RosterSetReceivedEvent(None, conn=self,
            stanza=iq_obj))
        raise nbxmpp.NodeProcessed

    def _nec_roster_set_received(self, obj):
        if obj.conn.name != self.name:
            return
        for jid in obj.items:
            item = obj.items[jid]
            app.nec.push_incoming_event(RosterInfoEvent(None, conn=self,
                jid=jid, nickname=item['name'], sub=item['sub'],
                ask=item['ask'], groups=item['groups']))
            account_jid = app.get_jid_from_account(self.name)
            app.logger.add_or_update_contact(account_jid, jid, item['name'],
                item['sub'], item['ask'], item['groups'])
        if obj.version:
            app.config.set_per('accounts', self.name, 'roster_version',
                obj.version)

    def _messageCB(self, con, stanza):
        """
        Called when we receive a message
        """

        # Check if a child of the message contains any
        # of these namespaces, so we dont execute the
        # message handler for them.
        # They have defined their own message handlers
        # but nbxmpp executes less common handlers last
        if self._message_namespaces & set(stanza.getProperties()):
            return
        log.debug('MessageCB')

        app.nec.push_incoming_event(NetworkEvent('raw-message-received',
            conn=self, stanza=stanza, account=self.name))

    def _dispatch_gc_msg_with_captcha(self, stanza, msg_obj):
        msg_obj.stanza = stanza
        app.nec.push_incoming_event(GcMessageReceivedEvent(None,
            conn=self, msg_obj=msg_obj))

    def _on_bob_received(self, conn, result, cid):
        """
        Called when we receive BoB data
        """
        if cid not in self.awaiting_cids:
            return

        if result.getType() == 'result':
            data = result.getTags('data', namespace=nbxmpp.NS_BOB)
            if data.getAttr('cid') == cid:
                for func in self.awaiting_cids[cid]:
                    cb = func[0]
                    args = func[1]
                    pos = func[2]
                    bob_data = data.getData()
                    def recurs(node, cid, data):
                        if node.getData() == 'cid:' + cid:
                            node.setData(data)
                        else:
                            for child in node.getChildren():
                                recurs(child, cid, data)
                    recurs(args[pos], cid, bob_data)
                    cb(*args)
                del self.awaiting_cids[cid]
                return

        # An error occured, call callback without modifying data.
        for func in self.awaiting_cids[cid]:
            cb = func[0]
            args = func[1]
            cb(*args)
        del self.awaiting_cids[cid]

    def get_bob_data(self, cid, to, callback, args, position):
        """
        Request for BoB (XEP-0231) and when data will arrive, call callback
        with given args, after having replaced cid by it's data in
        args[position]
        """
        if cid in self.awaiting_cids:
            self.awaiting_cids[cid].appends((callback, args, position))
        else:
            self.awaiting_cids[cid] = [(callback, args, position)]
        iq = nbxmpp.Iq(to=to, typ='get')
        data = iq.addChild(name='data', attrs={'cid': cid},
            namespace=nbxmpp.NS_BOB)
        self.connection.SendAndCallForResponse(iq, self._on_bob_received,
            {'cid': cid})

    def _presenceCB(self, con, prs):
        """
        Called when we receive a presence
        """
        log.debug('PresenceCB')
        app.nec.push_incoming_event(NetworkEvent('raw-pres-received',
            conn=self, stanza=prs))

    def _nec_subscribe_presence_received(self, obj):
        account = obj.conn.name
        if account != self.name:
            return
        if app.jid_is_transport(obj.fjid) and obj.fjid in \
        self.agent_registrations:
            self.agent_registrations[obj.fjid]['sub_received'] = True
            if not self.agent_registrations[obj.fjid]['roster_push']:
                # We'll reply after roster push result
                return True
        if app.config.get_per('accounts', self.name, 'autoauth') or \
        app.jid_is_transport(obj.fjid) or obj.jid in self.jids_for_auto_auth \
        or obj.transport_auto_auth:
            if self.connection:
                p = nbxmpp.Presence(obj.fjid, 'subscribed')
                p = self.add_sha(p)
                self.connection.send(p)
            if app.jid_is_transport(obj.fjid) or obj.transport_auto_auth:
                #TODO!?!?
                #self.show = 'offline'
                #self.status = 'offline'
                #emit NOTIFY
                pass
            if obj.transport_auto_auth:
                self.automatically_added.append(obj.jid)
                self.request_subscription(obj.jid, name=obj.user_nick)
            return True
        if not obj.status:
            obj.status = _('I would like to add you to my roster.')

    def _nec_subscribed_presence_received(self, obj):
        account = obj.conn.name
        if account != self.name:
            return
        # BE CAREFUL: no con.updateRosterItem() in a callback
        if obj.jid in self.automatically_added:
            self.automatically_added.remove(obj.jid)
            return True
        # detect a subscription loop
        if obj.jid not in self.subscribed_events:
            self.subscribed_events[obj.jid] = []
        self.subscribed_events[obj.jid].append(time_time())
        block = False
        if len(self.subscribed_events[obj.jid]) > 5:
            if time_time() - self.subscribed_events[obj.jid][0] < 5:
                block = True
            self.subscribed_events[obj.jid] = \
                self.subscribed_events[obj.jid][1:]
        if block:
            app.config.set_per('account', self.name, 'dont_ack_subscription',
                True)
            return True

    def _nec_subscribed_presence_received_end(self, obj):
        account = obj.conn.name
        if account != self.name:
            return
        if not app.config.get_per('accounts', account,
        'dont_ack_subscription'):
            self.ack_subscribed(obj.jid)

    def _nec_unsubscribed_presence_received(self, obj):
        account = obj.conn.name
        if account != self.name:
            return
        # detect a unsubscription loop
        if obj.jid not in self.subscribed_events:
            self.subscribed_events[obj.jid] = []
        self.subscribed_events[obj.jid].append(time_time())
        block = False
        if len(self.subscribed_events[obj.jid]) > 5:
            if time_time() - self.subscribed_events[obj.jid][0] < 5:
                block = True
            self.subscribed_events[obj.jid] = \
                self.subscribed_events[obj.jid][1:]
        if block:
            app.config.set_per('account', self.name, 'dont_ack_subscription',
                True)
            return True

    def _nec_unsubscribed_presence_received_end(self, obj):
        account = obj.conn.name
        if account != self.name:
            return
        if not app.config.get_per('accounts', account,
        'dont_ack_subscription'):
            self.ack_unsubscribed(obj.jid)

    def _nec_agent_removed(self, obj):
        if obj.conn.name != self.name:
            return
        for jid in obj.jid_list:
            log.debug('Removing contact %s due to unregistered transport %s' % \
                (jid, obj.agent))
            self.unsubscribe(jid)
            # Transport contacts can't have 2 resources
            if jid in app.to_be_removed[self.name]:
                # This way we'll really remove it
                app.to_be_removed[self.name].remove(jid)

    def _MucOwnerCB(self, con, iq_obj):
        log.debug('MucOwnerCB')
        app.nec.push_incoming_event(MucOwnerReceivedEvent(None, conn=self,
            stanza=iq_obj))

    def _MucAdminCB(self, con, iq_obj):
        log.debug('MucAdminCB')
        app.nec.push_incoming_event(MucAdminReceivedEvent(None, conn=self,
            stanza=iq_obj))

    def _PrivacySetCB(self, con, iq_obj):
        """
        Privacy lists (XEP 016)

        A list has been set.
        """
        log.debug('PrivacySetCB')
        if not self.connection or self.connected < 2:
            return
        result = iq_obj.buildReply('result')
        q = result.getTag('query')
        if q:
            result.delChild(q)
        self.connection.send(result)

        for list_ in iq_obj.getQueryPayload():
            if list_.getName() == 'list':
                self.get_privacy_list(list_.getAttr('name'))

        raise nbxmpp.NodeProcessed

    def _getRoster(self):
        log.debug('getRosterCB')
        if not self.connection:
            return
        self.connection.getRoster(self._on_roster_set)
        self.discoverItems(app.config.get_per('accounts', self.name,
            'hostname'), id_prefix='Gajim_')
        if app.config.get_per('accounts', self.name, 'use_ft_proxies'):
            self.discover_ft_proxies()

    def discover_ft_proxies(self):
        cfg_proxies = app.config.get_per('accounts', self.name,
            'file_transfer_proxies')
        our_jid = helpers.parse_jid(app.get_jid_from_account(self.name) + \
            '/' + self.server_resource)
        testit = app.config.get_per('accounts', self.name,
            'test_ft_proxies_on_startup')
        if cfg_proxies:
            proxies = [e.strip() for e in cfg_proxies.split(',')]
            for proxy in proxies:
                app.proxy65_manager.resolve(proxy, self.connection, our_jid,
                    testit=testit)

    def discover_servers(self):
        if not self.connection:
            return
        servers = []
        for c in app.contacts.iter_contacts(self.name):
            s = app.get_server_from_jid(c.jid)
            if s not in servers and s not in app.transport_type:
                servers.append(s)
        for s in servers:
            self.discoverInfo(s)

    def _on_roster_set(self, roster):
        app.nec.push_incoming_event(RosterReceivedEvent(None, conn=self,
            xmpp_roster=roster))

    def _nec_roster_received(self, obj):
        if obj.conn.name != self.name:
            return
        our_jid = app.get_jid_from_account(self.name)

        if self.connected > 1 and self.continue_connect_info:
            msg = self.continue_connect_info[1]
            sign_msg = self.continue_connect_info[2]
            signed = ''
            send_first_presence = True
            if sign_msg:
                signed = self.get_signed_presence(msg,
                    self._send_first_presence)
                if signed is None:
                    app.nec.push_incoming_event(GPGPasswordRequiredEvent(None,
                        conn=self, callback=self._send_first_presence))
                    # _send_first_presence will be called when user enter
                    # passphrase
                    send_first_presence = False
            if send_first_presence:
                self._send_first_presence(signed)

        if obj.received_from_server:
            for jid in obj.roster:
                if jid != our_jid and app.jid_is_transport(jid) and \
                not app.get_transport_name_from_jid(jid):
                    # we can't determine which iconset to use
                    self.discoverInfo(jid)

            app.logger.replace_roster(self.name, obj.version, obj.roster)

        for contact in app.contacts.iter_contacts(self.name):
            if not contact.is_groupchat() and contact.jid not in obj.roster\
            and contact.jid != our_jid:
                app.nec.push_incoming_event(RosterInfoEvent(None,
                    conn=self, jid=contact.jid, nickname=None, sub=None,
                    ask=None, groups=()))
        for jid, info in obj.roster.items():
            app.nec.push_incoming_event(RosterInfoEvent(None,
                conn=self, jid=jid, nickname=info['name'],
                sub=info['subscription'], ask=info['ask'],
                groups=info['groups'], avatar_sha=info['avatar_sha']))

    def _send_first_presence(self, signed=''):
        show = self.continue_connect_info[0]
        msg = self.continue_connect_info[1]
        sign_msg = self.continue_connect_info[2]
        if sign_msg and not signed:
            signed = self.get_signed_presence(msg)
            if signed is None:
                app.nec.push_incoming_event(BadGPGPassphraseEvent(None,
                    conn=self))
                self.USE_GPG = False
                signed = ''
        self.connected = app.SHOW_LIST.index(show)
        sshow = helpers.get_xmpp_show(show)
        # send our presence
        if show == 'invisible':
            self.send_invisible_presence(msg, signed, True)
            return
        if show not in ['offline', 'online', 'chat', 'away', 'xa', 'dnd']:
            return
        priority = app.get_priority(self.name, sshow)
        p = nbxmpp.Presence(typ=None, priority=priority, show=sshow)
        if msg:
            p.setStatus(msg)
        if signed:
            p.setTag(nbxmpp.NS_SIGNED + ' x').setData(signed)
        p = self.add_sha(p)

        if self.connection:
            self.connection.send(p)
            self.priority = priority
        app.nec.push_incoming_event(OurShowEvent(None, conn=self,
            show=show))
        if self.vcard_supported:
            # ask our VCard
            self.get_module('VCardTemp').request_vcard()

        # Get bookmarks
        self.get_module('Bookmarks').get_bookmarks()

        # Get annotations from private namespace
        self.get_module('Annotations').get_annotations()

        # Inform GUI we just signed in
        app.nec.push_incoming_event(SignedInEvent(None, conn=self))
        self.get_module('PEP').send_stored_publish()
        self.continue_connect_info = None

    def _PubkeyGetCB(self, con, iq_obj):
        log.info('PubkeyGetCB')
        jid_from = helpers.get_full_jid_from_iq(iq_obj)
        sid = iq_obj.getAttr('id')
        jingle_xtls.send_cert(con, jid_from, sid)
        raise nbxmpp.NodeProcessed

    def _PubkeyResultCB(self, con, iq_obj):
        log.info('PubkeyResultCB')
        jid_from = helpers.get_full_jid_from_iq(iq_obj)
        jingle_xtls.handle_new_cert(con, iq_obj, jid_from)

    def _BlockingSetCB(self, con, iq_obj):
        log.debug('_BlockingSetCB')
        app.nec.push_incoming_event(
            BlockingEvent(None, conn=self, stanza=iq_obj))
        reply = nbxmpp.Iq(typ='result', attrs={'id': iq_obj.getID()},
                          to=iq_obj.getFrom(), frm=iq_obj.getTo(), xmlns=None)
        self.connection.send(reply)
        raise nbxmpp.NodeProcessed

    def _BlockingResultCB(self, con, iq_obj):
        log.debug('_BlockingResultCB')
        app.nec.push_incoming_event(
            BlockingEvent(None, conn=self, stanza=iq_obj))
        raise nbxmpp.NodeProcessed

    def _nec_blocking(self, obj):
        if obj.conn.name != self.name:
            return
        if obj.unblock_all:
            self.blocked_contacts = []
        elif obj.blocklist:
            self.blocked_contacts = obj.blocklist
        else:
            for jid in obj.blocked_jids:
                if jid not in self.blocked_contacts:
                    self.blocked_contacts.append(jid)
                contact_list = app.contacts.get_contacts(self.name, jid)
                for contact in contact_list:
                    contact.show = 'offline'
            for jid in obj.unblocked_jids:
                if jid in self.blocked_contacts:
                    self.blocked_contacts.remove(jid)
                # Send a presence Probe to get the current Status
                probe = nbxmpp.Presence(jid, 'probe', frm=self.get_own_jid())
                self.connection.send(probe)

    def _nec_stream_other_host_received(self, obj):
        if obj.conn.name != self.name:
            return
        self.redirected = obj.redirected

    def _StreamCB(self, con, obj):
        log.debug('StreamCB')
        app.nec.push_incoming_event(StreamReceivedEvent(None,
            conn=self, stanza=obj))

    def _register_handlers(self, con, con_type):
        # try to find another way to register handlers in each class
        # that defines handlers
        con.RegisterHandler('message', self._messageCB)
        con.RegisterHandler('presence', self._presenceCB)
        con.RegisterHandler('iq', self._rosterSetCB, 'set', nbxmpp.NS_ROSTER)
        con.RegisterHandler('iq', self._siSetCB, 'set', nbxmpp.NS_SI)
        con.RegisterHandler('iq', self._siErrorCB, 'error', nbxmpp.NS_SI)
        con.RegisterHandler('iq', self._siResultCB, 'result', nbxmpp.NS_SI)
        con.RegisterHandler('iq', self._discoGetCB, 'get', nbxmpp.NS_DISCO)
        con.RegisterHandler('iq', self._bytestreamSetCB, 'set',
            nbxmpp.NS_BYTESTREAM)
        con.RegisterHandler('iq', self._bytestreamResultCB, 'result',
            nbxmpp.NS_BYTESTREAM)
        con.RegisterHandler('iq', self._bytestreamErrorCB, 'error',
            nbxmpp.NS_BYTESTREAM)
        con.RegisterHandlerOnce('iq', self.IBBAllIqHandler)
        con.RegisterHandler('iq', self.IBBIqHandler, ns=nbxmpp.NS_IBB)
        con.RegisterHandler('message', self.IBBMessageHandler, ns=nbxmpp.NS_IBB)
        con.RegisterHandler('iq', self._DiscoverItemsCB, 'result',
            nbxmpp.NS_DISCO_ITEMS)
        con.RegisterHandler('iq', self._DiscoverItemsErrorCB, 'error',
            nbxmpp.NS_DISCO_ITEMS)
        con.RegisterHandler('iq', self._DiscoverInfoCB, 'result',
            nbxmpp.NS_DISCO_INFO)
        con.RegisterHandler('iq', self._DiscoverInfoErrorCB, 'error',
            nbxmpp.NS_DISCO_INFO)
        con.RegisterHandler('iq', self._MucOwnerCB, 'result',
            nbxmpp.NS_MUC_OWNER)
        con.RegisterHandler('iq', self._MucAdminCB, 'result',
            nbxmpp.NS_MUC_ADMIN)
        con.RegisterHandler('iq', self._SecLabelCB, 'result',
            nbxmpp.NS_SECLABEL_CATALOG)
        con.RegisterHandler('iq', self._CommandExecuteCB, 'set',
            nbxmpp.NS_COMMANDS)
        con.RegisterHandler('iq', self._DiscoverInfoGetCB, 'get',
            nbxmpp.NS_DISCO_INFO)
        con.RegisterHandler('iq', self._DiscoverItemsGetCB, 'get',
            nbxmpp.NS_DISCO_ITEMS)
        con.RegisterHandler('iq', self._PrivacySetCB, 'set', nbxmpp.NS_PRIVACY)
        con.RegisterHandler('iq', self._ArchiveCB, ns=nbxmpp.NS_MAM_1)
        con.RegisterHandler('iq', self._ArchiveCB, ns=nbxmpp.NS_MAM_2)
        con.RegisterHandler('iq', self._JingleCB, 'result')
        con.RegisterHandler('iq', self._JingleCB, 'error')
        con.RegisterHandler('iq', self._JingleCB, 'set', nbxmpp.NS_JINGLE)
        con.RegisterHandler('iq', self._ErrorCB, 'error')
        con.RegisterHandler('iq', self._IqCB)
        con.RegisterHandler('iq', self._ResultCB, 'result')
        con.RegisterHandler('unknown', self._StreamCB,
            nbxmpp.NS_XMPP_STREAMS, xmlns=nbxmpp.NS_STREAMS)
        con.RegisterHandler('iq', self._PubkeyGetCB, 'get',
            nbxmpp.NS_PUBKEY_PUBKEY)
        con.RegisterHandler('iq', self._PubkeyResultCB, 'result',
            nbxmpp.NS_PUBKEY_PUBKEY)
        con.RegisterHandler('iq', self._BlockingSetCB, 'set',
            nbxmpp.NS_BLOCKING)
        con.RegisterHandler('iq', self._BlockingResultCB, 'result',
            nbxmpp.NS_BLOCKING)

        for handler in self.get_module_handlers():
            con.RegisterHandler(*handler)