/// <summary>
/// Changes the value of the capabiltiy to the given value and informs all dependent degraders about the change
/// </summary>
/// <param name="ruleSet">Ruleset of the capability containing also the triggers</param>
/// <param name="targetCapability">The target capability value</param>
/// <param name="alreadyUpdated">The capabilities that already have been updated</param>
private static void ChangeCapabilityTo(
CapabilityRuleSet ruleSet,
int targetCapability,
HashSet <ICapability> alreadyUpdated)
{
var current = ruleSet.Capability.Current;
if (current != targetCapability)
{
ruleSet.Capability.Current = targetCapability;
foreach (var dependent in ruleSet.DependentCapabilities)
{
dependent.Degrader.UpdateDegradation(dependent, alreadyUpdated);
}
foreach (var trigger in ruleSet.Triggers)
{
trigger(ruleSet.Capability);
}
}
}
/// <summary>
/// Gets the ruleset for a certain capability. If the ruleset does not exist before,
/// it will be created and a new instance will be returned.
/// </summary>
/// <param name="targetCapability">Capability whose ruleset is queried</param>
/// <param name="createIfNotExisting">true, if the ruleset shall be created</param>
/// <returns>The found capability set</returns>
private CapabilityRuleSet GetRuleSetFor(ICapability targetCapability, bool createIfNotExisting)
{
CheckThatInDegrader(targetCapability);
CapabilityRuleSet result;
if (!_rules.TryGetValue(targetCapability, out result))
{
if (!createIfNotExisting)
{
throw new InvalidOperationException("Given capability does not exist");
}
result = new CapabilityRuleSet
{
Capability = targetCapability
};
_rules[targetCapability] = result;
}
return(result);
}