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import os
import random
import base64
import time
import conf
from sugar import env
import logging
from sugar.p2p import Stream
from sugar.presence import PresenceService
from model.Invites import Invites
PRESENCE_SERVICE_TYPE = "_presence_olpc._tcp"
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, shell):
profile = conf.get_profile()
self._nick = profile.get_nick_name()
user_dir = profile.get_path()
self._icon = None
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()
fd.close()
break
self._pservice = PresenceService.get_instance()
self._invites = Invites()
self._shell = shell
self._shell.connect('activity-changed', self.__activity_changed_cb)
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 announce(self):
# Create and announce our presence
color = conf.get_profile().get_color()
props = {'color':color.to_string()}
activity = self._shell.get_current_activity()
if activity is not None:
props['cur_activity':activity.get_id()]
self._last_activity_update = time.time()
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()))
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")
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
logging.debug("*** Updating current activity to %s" % self._pending_activity_update)
return False
def __activity_changed_cb(self, shell, activity):
"""Update our presence service with the latest activity, but no
more frequently than every 30 seconds"""
self._pending_activity_update = activity.get_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)
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