/// <summary>
/// Gets whether or not the contact is available.
/// </summary>
/// <param name="localEndpoint"></param>
/// <param name="cancellationToken"></param>
/// <returns></returns>
async Task<bool> GetAvailableAsync(LocalEndpoint localEndpoint, CancellationToken cancellationToken)
{
// obtain presense state
var presence = await localEndpoint
.GetPresenceContext()
.GetPresenceStateAsync(Endpoint.Uri, cancellationToken);
// assume present if no status at all; failsafe
if (presence == null)
return true;
// currently online
if (presence.Availability == PresenceAvailability.IdleOnline ||
presence.Availability == PresenceAvailability.None ||
presence.Availability == PresenceAvailability.Online)
return true;
// active within 30 seconds
if (DateTime.UtcNow - presence.LastActive <= TimeSpan.FromSeconds(30))
return true;
return false;
}