sugar-toolkit-gtk3/shell/model/Owner.py

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# Copyright (C) 2006, Red Hat, Inc.
#
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
import os
import random
import base64
import time
import logging
import dbus
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from sugar import env
from sugar import profile
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from sugar.p2p import Stream
from sugar.presence import PresenceService
from sugar import util
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from model.Invites import Invites
PRESENCE_SERVICE_TYPE = "_presence_olpc._tcp"
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class ShellOwner(object):
"""Class representing the owner of this machine/instance. This class
runs in the shell and serves up the buddy icon and other stuff. It's the
server portion of the Owner, paired with the client portion in Buddy.py."""
def __init__(self):
self._nick = profile.get_nick_name()
user_dir = env.get_profile_path()
self._icon = None
self._icon_hash = ""
for fname in os.listdir(user_dir):
if not fname.startswith("buddy-icon."):
continue
fd = open(os.path.join(user_dir, fname), "r")
self._icon = fd.read()
if self._icon:
# Get the icon's hash
import md5, binascii
digest = md5.new(self._icon).digest()
self._icon_hash = util.printable_hash(digest)
fd.close()
break
self._pservice = PresenceService.get_instance()
self._invites = Invites()
self._last_activity_update = time.time()
self._pending_activity_update_timer = None
self._pending_activity_update = None
def get_invites(self):
return self._invites
def get_name(self):
return self._nick
def announce(self):
# Create and announce our presence
color = profile.get_color()
props = {'color': color.to_string(), 'icon-hash': self._icon_hash}
self._service = self._pservice.register_service(self._nick,
PRESENCE_SERVICE_TYPE, properties=props)
logging.debug("Owner '%s' using port %d" % (self._nick, self._service.get_port()))
try:
self._icon_stream = Stream.Stream.new_from_service(self._service)
self._icon_stream.register_reader_handler(self._handle_buddy_icon_request, "get_buddy_icon")
self._icon_stream.register_reader_handler(self._handle_invite, "invite")
except:
logging.error('Our xmlprc implementation does not work with Python 2.5')
def _handle_buddy_icon_request(self):
"""XMLRPC method, return the owner's icon encoded with base64."""
if self._icon:
return base64.b64encode(self._icon)
return ""
def _handle_invite(self, issuer, bundle_id, activity_id):
"""XMLRPC method, called when the owner is invited to an activity."""
self._invites.add_invite(issuer, bundle_id, activity_id)
return ''
def __update_advertised_current_activity_cb(self):
self._last_activity_update = time.time()
self._pending_activity_update_timer = None
if self._pending_activity_update:
logging.debug("*** Updating current activity to %s" % self._pending_activity_update)
self._service.set_published_value('curact', dbus.String(self._pending_activity_update))
return False
def set_current_activity(self, activity_id):
"""Update our presence service with the latest activity, but no
more frequently than every 30 seconds"""
self._pending_activity_update = activity_id
# If there's no pending update, we must not have updated it in the
# last 30 seconds (except for the initial update, hence we also check
# for the last update)
if not self._pending_activity_update_timer or time.time() - self._last_activity_update > 30:
self.__update_advertised_current_activity_cb()
return
# If we have a pending update already, we have nothing left to do
if self._pending_activity_update_timer:
return
# Otherwise, we start a timer to update the activity at the next
# interval, which should be 30 seconds from the last update, or if that
# is in the past already, then now
next = 30 - max(30, time.time() - self._last_activity_update)
self._pending_activity_update_timer = gobject.timeout_add(next * 1000,
self.__update_advertised_current_activity_cb)