Presence Service D-Bus API

  This page is monitored by the OLPC team.

PresenceService DBus API

Revision 3 (post Collabora week)

There are 3 conceptual objects:

• PresenceService - manages and provides a query API for Activity and Buddy objects
• Activity - represents a shared space in which one or more buddies participate. Activities are globally unique.
• Buddy - represents another laptop somewhere on the network that you can communicate with

PresenceService Object

Service: org.laptop.Sugar.Presence
Interface: org.laptop.Sugar.Presence
Object Path: /org/laptop/Sugar/Presence

Signals

• ActivityAppeared (o: activity)
• ActivityDisappeared (o: buddy)
• BuddyAppeared (o: buddy)
• BuddyDisappeared (o: buddy)

Methods

• GetActivities() -> ao
  • Gets all activities the PS knows about
  • Returns: array of activity object paths
• GetActivity(s: id) -> o
  • Gets a specific activity object by the activity's ID
  • Returns: activity object path
• GetBuddies() -> ao
  • Gets all buddies the PS knows about
  • Returns: array of buddy object paths
• GetBuddyByPublicKey(ay: key) -> o
  • Gets a specific buddy, searching on the buddy's public key
  • Returns: the buddy object path of the requested buddy
• GetOwner() -> o
  • Gets the owner buddy object, which is always present
  • Returns: the buddy object path of the owner
• ShareActivity(s: activity id, s: activity type, s: name, a{sv}: properties) -> o
  • Shares an activity with others
  • Returns: object path representing the new activity

Activity Object

Interface: org.laptop.Sugar.Presence.Activity
Object Path: /org/laptop/Sugar/Presence/Activities/

Signals

• BuddyJoined (buddy object path)
• BuddyLeft (buddy object path)

Methods

• GetId() -> s
  • Gets the activity's ID
  • Returns: string representing the activity's ID
• Join() -> nothing
  • Joins the activity
  • Returns: nothing, or an exception on error
• GetJoinedBuddies() -> ao
  • Gets all buddies who are currently participating in this activity
  • Returns: array of buddy object paths
• GetChannels() -> ao
  • Gets all the Telepathy channels (chat, tube, voip, etc) belonging to this activity
  • Returns: array of Telepathy channel object paths

Buddy Object

Interface: org.laptop.Sugar.Presence.Buddy
Object Path: /org/laptop/Sugar/Presence/Buddies/

Signals

Refered objects passed in signals are specific to this buddy only.

• IconChanged (ay: icon data)
• JoinedActivity (o: activity)
• LeftActivity (o: activity)
• PropertyChanged (a{sv}: updated, as: deleted)

Methods

• GetProperties() -> a{sv}
  • Gets all the general properties of the buddy
  • Returns: a dbus dict of buddy properties, like nickname, realname, IP address, whether or not this buddy is the laptop owner, etc
• GetIcon() -> ay
  • Gets the buddy's icon data
  • Returns: a character array containing the byte stream of the icon data
• GetJoinedActivities() -> ao
  • Gets all activities in which this buddy is currently participating
  • Returns: array of activity object paths