private IEnumerable <DynamicPropertyResult> LastEventIdPropertyCalculator(IQueryContext context, Name type, Name subject, Name def, Name target)
{
ulong min = ulong.MinValue;
var allEvents = m_registry.Values;
foreach (var eve in allEvents)
{
if (eve.Timestamp >= min)
{
min = eve.Timestamp;
}
}
var lastEvents = m_registry.Where(x => x.Value.Timestamp == min);
var lastIndexes = new NameSearchTree <List <uint> >();
// Now we get a similar object as m_typeIndexes but only with the last events
foreach (var ind in m_typeIndexes)
{
foreach (var eve in lastEvents)
{
if (ind.Key.ToString() == eve.Value.EventName.ToString() && !lastIndexes.Contains(ind))
{
lastIndexes.Add(ind);
}
}
}
// Now that we have the events of the last tick we can now ask the context
var key = Name.BuildName((Name)AMConsts.EVENT, type, subject, def, target);
foreach (var c in context.Constraints)
{
var unifiedSet = lastIndexes.Unify(key, c);
foreach (var pair in unifiedSet)
{
foreach (var id in pair.Item1)
{
yield return(new DynamicPropertyResult(new ComplexValue(Name.BuildName(id)), new SubstitutionSet(pair.Item2)));
}
}
if (!unifiedSet.Any())
{
yield return(new DynamicPropertyResult(new ComplexValue(Name.BuildName(-1)), c));
}
}
}
