/// <summary>
/// Constructor of a presence watcher supporting persistent, polling and on-demand subscriptions
/// to presence categories published by specified remote presentities. on-demand subscription is
/// also known as presence query. The code here also handles self-presence.
/// </summary>
/// <param name="endpoint"></param>
public PresenceWatcher(LocalEndpoint endpoint)
{
_remotePresenceServices = endpoint.PresenceServices;
// RemotePresenceView for persitent subscription:
RemotePresenceViewSettings rpvs = new RemotePresenceViewSettings();
rpvs.SubscriptionMode = RemotePresenceViewSubscriptionMode.Persistent;
_persistentPresenceView = new RemotePresenceView(endpoint, rpvs);
_persistentPresenceView.PresenceNotificationReceived += new EventHandler<RemotePresentitiesNotificationEventArgs>(PersistentPresenceReceivedEventHandler);
_persistentPresenceView.SubscriptionStateChanged += new EventHandler<RemoteSubscriptionStateChangedEventArgs>(PersistentSubscriptionStateChangedEventHandler);
// RemotePresenceView for polling subscription
rpvs = new RemotePresenceViewSettings();
rpvs.SubscriptionMode = RemotePresenceViewSubscriptionMode.Polling;
rpvs.PollingInterval = new TimeSpan(0, 5, 0); // every 5 minutes
_pollingPresenceView = new RemotePresenceView(endpoint, rpvs);
_pollingPresenceView.SetPresenceSubscriptionCategoriesForPolling(new string[] { "contactCard", "state", "note", "noteHistory" });
_pollingPresenceView.PresenceNotificationReceived += new EventHandler<RemotePresentitiesNotificationEventArgs>(PollingPresenceReceivedEventHandler);
_pollingPresenceView.SubscriptionStateChanged += new EventHandler<RemoteSubscriptionStateChangedEventArgs>(PollingSubscriptionStateChangedEventHandler);
}
public static Task <IEnumerable <RemotePresentityNotification> > PresenceQueryAsync(
this LocalEndpointPresenceServices presenceServices, IEnumerable <string> targets, string[] categories,
EventHandler <RemotePresentitiesNotificationEventArgs> queryResultHandler)
{
return(Task <IEnumerable <RemotePresentityNotification> > .Factory.FromAsync(
presenceServices.BeginPresenceQuery,
presenceServices.EndPresenceQuery,
targets, categories,
queryResultHandler, null));
}
public static Task RefreshRemotePresenceViews(this
LocalEndpointPresenceServices presenceServices)
{
return(Task.Factory.FromAsync(presenceServices.BeginRefreshRemotePresenceViews,
presenceServices.EndRefreshRemotePresenceViews, null));
}
