Development Team/Presence Service Removal

Some notes follow about how we can replace the implementation of the signals and methods in the Presence Service by another that uses more fully the telepathy framework and is stateless.

@dbus.service.signal(PRESENCE_INTERFACE, signature="o")
def ActivityAppeared(self, activity):
    pass

• Used by: Shell to display activities in the neighborhood and friends views

• Present: Is fired when the properties contained in org.laptop.Telepathy.ActivityProperties become all non-None. We start tracking an ActivityProperties when a Buddy we track joins/shares an activity, and we know that via the ActivitiesChanged signal in the interface org.laptop.Telepathy.BuddyInfo.

• Future:

@dbus.service.signal(PRESENCE_INTERFACE, signature="o")
def ActivityDisappeared(self, activity):
    pass

• Used by: Shell to display activities in the neighborhood and friends views

• Present: Is fired when the properties contained in org.laptop.Telepathy.ActivityProperties stop being all non-None, and when the last buddy leaves the activity. A buddy is known to have left an activity when disappears (see BuddyDisappeared) and when the MembersChanged signal in org.freedesktop.Telepathy.Channel.Interface.Group says so.

• Future:

@dbus.service.signal(PRESENCE_INTERFACE, signature="o")
def BuddyAppeared(self, buddy):
    pass

• Used by: Shell to display buddies in the neighborhood and friends views

• Present: Is fired when the properties contained in org.laptop.Telepathy.BuddyInfo become all non-None. We start tracking a BuddyInfo when it appears as online in the signal PresenceUpdate of org.freedesktop.Telepathy.Connection.Interface.Presence.

• Future:

@dbus.service.signal(PRESENCE_INTERFACE, signature="o")
def BuddyDisappeared(self, buddy):

• Used by: Shell to display buddies in the neighborhood and friends views

• Present: A buddy is known to have disappeared when PresenceUpdate notifies us it has gone offline.

• Future:

@dbus.service.signal(PRESENCE_INTERFACE, signature="oos")
def ActivityInvitation(self, activity, buddy, message):
    pass

• Used by: Shell to display a new invitation in the frame

• Present: Gets fired when a new channel that communicates with a room becomes ready.

• Future:

@dbus.service.signal(PRESENCE_INTERFACE, signature="soos")
def PrivateInvitation(self, bus_name, connection, channel, chan_type):
    pass

• Used by: Shell to display an invitation from a non-Sugar XMPP client

• Present: Gets fired when a new channel that communicates with a contact is created.

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="", out_signature="ao")
def GetActivities(self):
    pass

• Used by: Shell to display shared activities

• Present: Returns a list of activities cached locally, this list is kept up to date by listening to ActivitiesChanged in org.laptop.Telepathy.BuddyInfo.

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="s", out_signature="o")
def GetActivityById(self, actid):
    pass

• Used by: at activity startup to know whether this is a shared instance.

• Present: Returns the activity identified by actid from the list mentioned in GetActivities.

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="",
                        out_signature="ao")
def GetBuddies(self):
    pass

• Used by: shell to display all buddies in the neighborhood view and to retrieve the contact of a friend.

• Present: returns all tracked buddies, see BuddyAppeared.

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="ay", out_signature="o",
                        byte_arrays=True)
def GetBuddyByPublicKey(self, key):
    pass

• Used by:

• Present:

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="sou",
                        out_signature="o")
def GetBuddyByTelepathyHandle(self, tp_conn_name, tp_conn_path, handle):
    pass

• Used by:

• Present:

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="", out_signature="o")
def GetOwner(self):
    pass

• Used by:

• Present:

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="", out_signature="so")
def GetPreferredConnection(self):
    pass

• Used by:

• Present:

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="sssa{sv}",
        out_signature="o", async_callbacks=("async_cb", "async_err_cb"),
        sender_keyword="sender")
def ShareActivity(self, actid, atype, name, properties, async_cb,
                    async_err_cb, sender):
    pass

• Used by:

• Present:

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="as", out_signature="")
def SyncFriends(self, keys):
    pass

• Used by:

• Present:

• Future:

@dbus.service.method(PRESENCE_INTERFACE, in_signature="", out_signature="")
def RestartServerConnection(self):
    pass

• Used by:

• Present:

• Future: