/// <summary>
/// Abilities inherited from ancestor objects.
/// </summary>
/// <param name="obj"></param>
/// <param name="includeShared"></param>
/// <returns></returns>
public static IEnumerable <Ability> AncestorAbilities(this IAbilityObject obj, Func <IAbilityObject, bool> sourceFilter = null)
{
var abils = new List <Ability>();
foreach (var p in obj.Ancestors(sourceFilter).ExceptSingle(null))
{
abils.AddRange(p.IntrinsicAbilities);
}
return(abils.Where(a => a.Rule == null || a.Rule.CanTarget(obj.AbilityTarget)));
}
/// <summary>
/// Finds empire-common abilities inherited by an object (e.g. empire abilities of a sector in which a ship resides).
/// </summary>
/// <param name="obj"></param>
/// <param name="sourceFilter"></param>
/// <returns></returns>
public static IEnumerable <Ability> EmpireCommonAbilities(this IAbilityObject obj, Func <IAbilityObject, bool> sourceFilter = null)
{
// Unowned objects cannot empire common abilities.
var ownable = obj as IOwnableAbilityObject;
if (ownable == null || ownable.Owner == null)
{
yield break;
}
// Where are these abilities coming from?
// Right now they can only come from ancestors, since sectors and star systems are the only common ability objects.
// TODO - Would it make sense for them to come from descendants? What kind of common ability object could be used as a descendant of an owned object?
var ancestors = obj.Ancestors(sourceFilter).OfType <ICommonAbilityObject>();
// What abilities do we have?
foreach (var ancestor in ancestors)
{
foreach (var abil in ancestor.EmpireAbilities(ownable.Owner, sourceFilter))
{
yield return(abil);
}
}
}