public AbstractTask GetNextTask(TaskBranch context, AbstractTask currentTask)
{
var result = context.GetKeyedTask(Key);
if (result == null)
{
Log.WarnFormat("Could not locate task for key {0}", Key);
result = context.GetNextTask(currentTask);
}
return result;
}
public AbstractTask GetNextTask(AbstractTask task)
{
var index = GetTaskIndex(task);
if (index == -1)
return null;
index++;
return index > (Tasks.Count - 1) ? null : Tasks[index];
}
public int GetTaskIndex(AbstractTask task)
{
return Tasks.IndexOf(task);
}
public AbstractTask GetPreviousTask(AbstractTask task)
{
var index = GetTaskIndex(task);
if (index == -1)
return null;
index--;
return index < 0 ? null : Tasks[index];
}
public AbstractTask GetNextTask(TaskBranch context, AbstractTask currentTask)
{
return context.GetNextTask(currentTask);
}
public AbstractTask GetNextTask(TaskBranch context, AbstractTask currentTask)
{
return null;
}
private bool IsForwardProgress(AbstractTask currentTask, AbstractTask lastTask)
{
var currentIndex = Tasks.IndexOf(currentTask);
var lastIndex = Tasks.IndexOf(lastTask);
return currentIndex >= lastIndex;
}