public Recallable GetNewRecallable()
{
// Return the Recallable with the lowest Order with an Appearance of 0. If no Recallables have an appearance of 0, return null.
Recallable lowest = null;
foreach (Recallable recallable in Recallables)
{
if (recallable.AppearanceCount == 0 && (lowest == null || recallable.Order < lowest.Order))
{
lowest = recallable;
}
}
return(lowest);
}
// Tick the clock once, making the next Recallable available or resurfacing an old Recallable for recall
public void Tick(int numberAllowedInUse, int minimumAppearances)
{
// Increase each Recallable's tick count and set each Recallable to non-required
foreach (Recallable recallable in Recallables)
{
recallable.TicksInCurrentState++;
recallable.State = recallable.State == Recallable.States.Require ? Recallable.States.On : recallable.State;
}
int numRecallablesInUse = InUse.Count;
if (numRecallablesInUse < numberAllowedInUse)
{
// Simply add a new Recallable if we haven't yet reached our number of Recallables allowed
Recallable newRecallable = GetNewRecallable();
newRecallable.State = Recallable.States.Require;
newRecallable.AppearanceCount++;
}
else
{
// Otherwise, replace an existing Recallable with a new one or one for recall
// Remove the Recallable with the largest TicksInCurrentState
Recallable RecallableToRemove = InUse[0];
foreach (Recallable recallable in InUse)
{
if (recallable.TicksInCurrentState > RecallableToRemove.TicksInCurrentState)
{
RecallableToRemove = recallable;
}
}
RecallableToRemove.State = Recallable.States.Off;
RecallableToRemove.TicksInCurrentState = 0;
// The Recallable we'll replace it with is either a new one (Off and AppearanceCount = 0) or one that's off but has been used (off and AppearanceCount > 0)
// If there are no new Recallables available, make sure we find one below by incrementing TicksInCurrentState for all Recallables until at least one is equal to or less than Recallable's TicksInCurrentState
if (GetNewRecallable() == null)
{
while (!Recallables.Exists(r => r.TicksInCurrentState >= r.ReturnAtTick))
{
foreach (Recallable recallable in Recallables)
{
recallable.TicksInCurrentState++;
}
}
}
// Recall a Recallable that's been unseen for too many ticks (based on its number of appearances).
Recallable mostTicksPastReturnRecallable = null;
foreach (Recallable recallable in Recallables)
{
if (recallable.State == Recallable.States.Off && recallable.AppearanceCount > 0 && recallable.TicksInCurrentState >= recallable.ReturnAtTick)
{
if (mostTicksPastReturnRecallable == null)
{
mostTicksPastReturnRecallable = recallable;
}
else
{
int mostTicksRecallable = mostTicksPastReturnRecallable.TicksInCurrentState - mostTicksPastReturnRecallable.ReturnAtTick;
int thisRecallable = recallable.TicksInCurrentState - recallable.ReturnAtTick;
if (thisRecallable > mostTicksRecallable)
{
mostTicksPastReturnRecallable = recallable;
}
}
}
}
// Only get a completely new Recallable if there are no Recallables needing recall
Recallable nextRecallable = mostTicksPastReturnRecallable != null ? mostTicksPastReturnRecallable : GetNewRecallable();
nextRecallable.State = Recallable.States.Require;
nextRecallable.AppearanceCount++;
}
}