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# telepathy-sunshine is the GaduGadu connection manager for Telepathy
#
# Copyright (C) 2006-2007 Ali Sabil <ali.sabil@gmail.com>
# Copyright (C) 2007 Johann Prieur <johann.prieur@gmail.com>
# Copyright (C) 2010 Krzysztof Klinikowski <kkszysiu@gmail.com>
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import logging, hashlib

import telepathy

import xml.etree.ElementTree as ET

from sunshine.lqsoft.pygadu.models import GaduProfile, GaduContact, GaduContactGroup

from twisted.internet import reactor

from sunshine.util.decorator import async
from sunshine.handle import SunshineHandleFactory
from sunshine.channel.contact_list import SunshineListChannel

__all__ = ['SunshineGroupChannel']

logger = logging.getLogger('Sunshine.GroupChannel')


class SunshineGroupChannel(SunshineListChannel):

    def __init__(self, connection, manager, props, object_path=None):
        self.__pending_add = []
        self.__pending_remove = []
        self.conn = connection
        self.groups = {}
        SunshineListChannel.__init__(self, connection, manager, props, object_path=object_path)
        self.GroupFlagsChanged(telepathy.CHANNEL_GROUP_FLAG_CAN_ADD | 
                telepathy.CHANNEL_GROUP_FLAG_CAN_REMOVE, 0)
        @async
        def create_group():
            if self._handle.group is None:
                name = self._handle.name
                for group in self.conn.profile.groups:
                    if group.Name != name:
                        h = hashlib.md5()
                        h.update(name)

                        group_xml = ET.Element("Group")
                        ET.SubElement(group_xml, "Id").text = h.hexdigest()
                        ET.SubElement(group_xml, "Name").text = name
                        ET.SubElement(group_xml, "IsExpanded").text = str('True')
                        ET.SubElement(group_xml, "IsRemovable").text = str('True')

                        g = GaduContactGroup.from_xml(group_xml)
                        self.conn.profile.addGroup(g)
                        
            for group in self.conn.profile.groups:
                self.groups[group.Id] = group.Name

            for contact in self.conn.profile.contacts:
                contact_groups = ET.fromstring(contact.Groups)
                if contact.Groups:
                    for group in contact_groups.getchildren():
                        if self.groups.has_key(group.text):
                            if self.groups[group.text] == self._handle.group.Name:
                                self.add_contact_to_group(self._handle.group, contact, None)
        create_group()


    def AddMembers(self, contacts, message):
        for contact_handle_id in contacts:
            contact_handle = self._conn.handle(telepathy.HANDLE_TYPE_CONTACT,
                        contact_handle_id)
            logger.info("Adding contact %s to group %s" %
                    (unicode(contact_handle), unicode(self._handle)))

            contact = contact_handle.contact
            group = self._handle.group

            self.add_contact_to_group(group, contact, contact_handle)
        reactor.callLater(3.0, self._conn_ref().exportContactsFile)

    def RemoveMembers(self, contacts, message):
        for contact_handle_id in contacts:
            contact_handle = self._conn.handle(telepathy.HANDLE_TYPE_CONTACT,
                        contact_handle_id)
            logger.info("Removing contact %s from pending group %s" %
                    (unicode(contact_handle), unicode(self._handle)))

            contact = contact_handle.contact
            group = self._handle.group

            self.delete_contact_from_group(group, contact, contact_handle)
        reactor.callLater(3.0, self._conn_ref().exportContactsFile)
        

    def Close(self):
        logger.debug("Deleting group %s" % self._handle.name)
        del self.conn.profile.groups[self._handle.name]

    @async
    def add_contact_to_group(self, group, contact, contact_handle):
        group_name = group.Name
        if group_name == self._handle.name:
            if hasattr(contact, 'uin'):
                contact_uin = contact.uin
            else:
                contact_uin = contact_handle.name

            handle = SunshineHandleFactory(self.conn, 'contact',
                    contact_uin, None)
            added = set()
            added.add(handle)

            if group.Name and group.Id:
                is_group = False

                contact_groups_xml = ET.Element("Groups")
                if hasattr(contact, 'Groups'):
                    contact_groups = ET.fromstring(contact.Groups)
                    for c_group in contact_groups.getchildren():
                        if c_group.text == group.Id:
                            is_group = True
                        ET.SubElement(contact_groups_xml, "GroupId").text = c_group.text
                if is_group != True:
                    ET.SubElement(contact_groups_xml, "GroupId").text = group.Id
                c_groups = ET.tostring(contact_groups_xml)

                if hasattr(contact, 'updateGroups'):
                    contact.updateGroups(c_groups)
                else:
                    self.conn.pending_contacts_to_group[contact_uin] = c_groups

            self.MembersChanged('', added, (), (), (), 0,
                    telepathy.CHANNEL_GROUP_CHANGE_REASON_NONE)

            logger.debug("Contact %s added to group %s" %
                    (handle.name, group_name))

    @async
    def delete_contact_from_group(self, group, contact, contact_handle):
        group_name = group.Name
        if group_name == self._handle.name:
            handle = SunshineHandleFactory(self.conn, 'contact',
                    contact.uin, None)
            removed = set()
            removed.add(handle)

            contact_groups_xml = ET.Element("Groups")
            contact_groups = ET.fromstring(contact.Groups)
            if contact.Groups:
                for c_group in contact_groups.getchildren():
                    if c_group.text != group.Id:
                        ET.SubElement(contact_groups_xml, "GroupId").text = c_group.text
            c_groups = ET.tostring(contact_groups_xml)

            contact.updateGroups(c_groups)

            self.MembersChanged('', (), removed, (), (), 0,
                    telepathy.CHANNEL_GROUP_CHANGE_REASON_NONE)

            logger.debug("Contact %s removed from group %s" %
                    (handle.name, group_name))