private bool CanExecuteNextStep(IEnumerable <Step> pendingSteps, Step next)
{
if (next is CancelConstructBuildingStep && ExecutingSteps.Any())
{
return(false);
}
var currentResourcePrereqs = pendingSteps.SelectMany(s => s.Prerequisites).OfType <ResourcePrerequisite>().ToList();
if (!currentResourcePrereqs.Any())
{
return(next.AllPrerequisitesMet());
}
var nextResourcePrereqs = next.Prerequisites.OfType <ResourcePrerequisite>().FirstOrDefault();
if (nextResourcePrereqs == null)
{
return(next.AllPrerequisitesMet());
}
return(HasEnoughResources(currentResourcePrereqs.Sum(r => r.Minerals) + nextResourcePrereqs.Minerals,
currentResourcePrereqs.Sum(r => r.Gas) + nextResourcePrereqs.Gas) &&
next.AllPrerequisitesMet());
}