Presence Service D-Bus API

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Revision as of 10:54, 29 August 2007 by SMcV (talk | contribs) (Document that ShareActivity() will be private-by-default for Trial-3)
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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)
    • PS has become aware of the given activity, either because of an invitation (in which case the ActivityInvitation signal will follow soon after) or because someone is advertising it as public
  • ActivityDisappeared (o: buddy)
    • PS believes that the given activity has disappeared - it is not advertised as public, and either nobody has sent us a private invitation, or everyone who invited us to it has gone offline
  • BuddyAppeared (o: buddy)
  • BuddyDisappeared (o: buddy)
  • ActivityInvitation (o: activity)
    • The user has been invited to a (public or hidden) activity, represented by the given object (which might have been created immediately before).
    • FIXME: as of 2007-08-28 this was documented to have parameters (o: activity, o: buddy), but the actual implementation only had one parameter?
  • PrivateInvitation (s: bus_name, o: connection, o: channel)
    • Someone has invited the user to take part in a private text conversation or VoIP call. (The platform doesn't currently handle this.)

Methods

  • GetActivities() -> ao
    • Gets all activities the PS knows about
    • Returns: array of activity object paths
  • GetActivityById(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
    • As of the Trial-2 API, the activity is visible to everyone; in the Trial-3 API it will be private by default
    • Returns: object path representing the new activity
  • GetPreferredConnection() -> so
    • Gets the preferred telepathy connection object that an activity should use when talking directly to telepathy.
    • Returns:
      • bus name of the Telepathy connection
      • object path of the Telepathy connection

Activity Object

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

Signals

  • BuddyJoined (o: buddy)
  • BuddyLeft (o: buddy)
  • NewChannel (o: Telepathy channel)

Methods

  • GetId() -> s
    • Gets the activity's ID
    • Returns: string representing the activity's ID
  • GetColor() -> s
    • Gets the activity's color
    • Returns: the activity's color in string format
  • GetName() -> s
    • Gets the activity's name
    • Returns: the activity's name
  • GetType() -> s
    • Gets the activity's type
    • Returns: the activity's type
  • 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() -> soao
    • Gets all the Telepathy channels (chat, tube, voip, etc) belonging to this activity
    • Returns:
      • bus name of the Telepathy connection
      • object path of the Telepathy connection
      • 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}: changed)

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

Owner Object

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

Owner is a subclass of Buddy, with additional methods for setting nickname, color, and buddy icon.

Methods

  • SetIcon(ay: data)
    • Sets the buddy's icon data
    • Returns:
  • SetProperties(a{sv}: properties) -> nothing
    • Sets various properties of the buddy, like nick name, color, and current activity
    • Returns: InvalidPropertyError if a property is unrecognized its value is invalid