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# Copyright (C) 2008 One Laptop Per Child
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser 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
"""Subclass of TubeConnection that converts handles to Sugar Buddies
STABLE.
"""
from telepathy.constants import (
CHANNEL_GROUP_FLAG_CHANNEL_SPECIFIC_HANDLES)
from sugar.presence.tubeconn import TubeConnection
from sugar.presence import presenceservice
class SugarTubeConnection(TubeConnection):
"""Subclass of TubeConnection that converts handles to Sugar Buddies"""
def __new__(cls, conn, tubes_iface, tube_id, address=None,
group_iface=None, mainloop=None):
self = super(SugarTubeConnection, cls).__new__(
cls, conn, tubes_iface, tube_id, address=address,
group_iface=group_iface, mainloop=mainloop)
self._conn = conn
self._group_iface = group_iface
return self
def get_buddy(self, cs_handle):
"""Retrieve a Buddy object given a telepathy handle.
cs_handle: A channel-specific CONTACT type handle.
returns: sugar.presence Buddy object or None
"""
pservice = presenceservice.get_instance()
if self.self_handle == cs_handle:
# It's me, just get my global handle
handle = self._conn.GetSelfHandle()
elif self._group_iface.GetGroupFlags() & \
CHANNEL_GROUP_FLAG_CHANNEL_SPECIFIC_HANDLES:
# The group (channel) has channel specific handles
handle = self._group_iface.GetHandleOwners([cs_handle])[0]
else:
# The group does not have channel specific handles
handle = cs_handle
# deal with failure to get the handle owner
if handle == 0:
return None
return pservice.get_buddy_by_telepathy_handle(
self._conn.service_name, self._conn.object_path, handle)
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