//Methods
//FIXME: should this be public? It is difficult to extend the behavior of the engine without
//hosting the extension in the same assembly, unless we do this.
internal ModelActions GetPossibleActions()
{
//Default - exclude: invalid, callbefore, callafter, calllast, which are handled seperatly.
ModelActionFlags exclude = ModelActionFlags.CallBefore | ModelActionFlags.CallAfter | ModelActionFlags.CallLast;
if (!this.InvalidActions)
{
exclude |= (ModelActionFlags)ModelItemFlags.Invalid;
}
//Loop through all models
ModelActions totalactions = new ModelActions();
foreach (Model model in this.Models)
{
//Ignore disabled models
if (model.Weight == 0 || model.Disabled)
{
continue;
}
totalactions.Add(model.Actions.FindFlag(exclude, false));
}
//Delegate
return(this.GetPossibleActions(totalactions));
}
protected ModelActions GetPossibleActions(ModelActions totalactions)
{
//Loop through all actions, specified
ModelActions possibleactions = new ModelActions();
foreach (ModelAction action in totalactions)
{
//Ignore Disabled actions
if (action.Weight == 0 || action.Disabled)
{
continue;
}
//Ignore CallLimit/CallOnce actions that have already been called (max times)
if (action.Accessed >= action.CallLimit)
{
continue;
}
//Note: CallFirst and CallLast imply CallOnce
if (action.Accessed > 0 && (action.CallFirst || action.CallLast))
{
continue;
}
//Ignore Actions, that return Models when were over the limit of those models
Type returntype = action.Method.ReturnType;
if (!returntype.IsPrimitive && typeof(Model).IsAssignableFrom(returntype) && returntype != typeof(Model))
{
Models found = (Models)this.Models.FindType(returntype).FindFlag((int)ModelItemFlags.Disabled, false);
if (found.Count >= found.MaxInstances)
{
continue;
}
}
//Determine if Requirements meet
ModelRequirement failedrequirement = null;
bool matched = MeetsRequirements(action.Requirements, out failedrequirement);
if (matched)
{
//Requirements met, action can be called
possibleactions.Add(action);
}
else
{
//Requirements not met, action can't be called
//Unless the user wants this to be called, when the requirements aren't met
if (this.InvalidActions && failedrequirement != null && failedrequirement.Throws)
{
//Note: We clone the action, and set the expected exception, just as if
//it were an invalid action from the start. We also set the weight of the
//invalid action, to the weight of the requirement, so it's not weighted
//the same as the (positive) version that's specified at the action level
ModelAction invalidaction = (ModelAction)action.Clone();
invalidaction.Exception = failedrequirement.Exception;
invalidaction.ExceptionId = failedrequirement.ExceptionId;
invalidaction.Weight = failedrequirement.Weight;
possibleactions.Add(invalidaction);
}
}
}
possibleactions.SortByWeightDesc(); //Sort all actions, across models
return(possibleactions);
}