internal override async Task OnFollowUpTransactionAsync(IFollowUpArgs e, Point position)
{
if (e.Initiator.Object is PistonTile)
return;
var trigger = (await e.GetAsync(TriggerPosition)).Tile as ITrigger;
var isTriggerOn = trigger?.IsOn ?? false;
var initiator = new MoveInitiator(this, position);
if (!IsExtended && isTriggerOn)
{
// Extend piston
if (await e.MoveAsync(position, position + Direction))
e.Emit(new PistonExtendRetractEvent(true));
}
else if (IsExtended && !isTriggerOn)
{
// Retract piston
if (await e.MoveAsync(position + Direction, position))
e.Emit(new PistonExtendRetractEvent(false));
}
// Otherwise do nothing
}
internal override async Task OnFollowUpTransactionAsync(IFollowUpArgs e, Point position)
{
// Teleport using a new transaction
// (because if teleportation fails, we still want every other move
// that happened before to apply)
if (Entity != Entity.None && AcceptedEntities.Includes(Entity.GetType()) &&
!(e.Initiator.Object is TeleporterTile))
{
// Now the initiator is the teleporter itself, so
// if the target is a teleporter as well the entity
// won't end up in an endless loop of teleportations.
e.Initiator = new MoveInitiator(this, position);
var isSuccessful = await e.MoveAsync(position, TargetPosition);
if (isSuccessful)
e.Emit(new TeleporterTileTeleportEvent(position, TargetPosition, Entity));
}
}
