/// <summary>
/// Called by mediator to perform next action in sequence
/// </summary>
/// <param name="random"></param>
/// <returns>
/// True when there are additional sequence actions to perform
/// False when performing the last action in sequence
/// False in the event of an action state check failure(rollback will be performed automatically)
/// </returns>
public bool DoNext(DeterministicRandom random)
{
if (queue.Count == 0)
{
throw new InvalidOperationException("This sequence does not contain a next action");
}
IAction next = queue.Dequeue();
//If Action is in a suitable state, perform action.
//Otherwise, engage rollback.
if (next.CanPerform())
{
Trace.WriteLine("[Sequence] Performing Action:" + next.GetType());
next.Perform(random);
}
else if (rollbackAction != null && rollbackAction.CanPerform())
{
Trace.WriteLine("[Sequence] Rolling Back Sequence");
rollbackAction.Perform(random);
queue.Clear();
}
return(queue.Count > 0);
}
