public AbstractQuestComponent(AbstractQuest quest)
{
if (quest is null)
{
throw new ArgumentNullException("quest", "QuestComponent must be associated with a not-null quest");
}
this.Quest = quest;
}
/// <summary>
/// Returns a collection of quests for which the quest parameter is a step.
/// </summary>
/// <param name="quest"></param>
/// <returns></returns>
public List <AbstractQuest> GetDependentQuests(AbstractQuest stepQuest)
{
if (stepQuest is null)
{
throw new ArgumentNullException(nameof(stepQuest));
}
return(QuestRegister.Where(quest => quest.Steps.Contains(stepQuest)).ToList());
}
public override void RemoveStep(AbstractQuest step)
{
if (step is null)
{
throw new ArgumentNullException(nameof(step));
}
if (!_steps.Contains(step))
{
throw new ArgumentException("The steps collection does not contain this particular step.");
}
_steps.Remove(step);
}
public void RegisterQuest(AbstractQuest quest)
{
if (quest is null)
{
throw new ArgumentNullException(nameof(quest));
}
if (QuestRegister.Contains(quest))
{
throw new ArgumentException("Quest Register already contains this quest object.");
}
QuestRegister.Add(quest);
RegisterModified?.Invoke();
}
/// <summary>
/// Completely deletes the quest. Also removes links to it from dependent quests.
/// </summary>
/// <param name="quest"></param>
public void UnregisterQuest(AbstractQuest quest)
{
if (quest is null)
{
throw new ArgumentNullException(nameof(quest));
}
if (!QuestRegister.Contains(quest))
{
throw new ArgumentException("Quest Register does not contain this quest object.");
}
foreach (var dependentQuest in GetDependentQuests(quest))
{
dependentQuest.RemoveStep(quest);
}
QuestRegister.Remove(quest);
RegisterModified?.Invoke();
}
public override void AddStep(AbstractQuest step)
{
if (step is null)
{
throw new ArgumentNullException(nameof(step));
}
if (_steps.Contains(step))
{
throw new ArgumentException("The steps collection already contains this particular step.");
}
if (step.Steps.Contains(this))
{
throw new ArgumentException("The step parameter is already contains this quest as a step.");
}
if (step.Equals(this))
{
throw new ArgumentException("The step parameter is equal by reference to this quest. A quest can't be a step to itself.");
}
_steps.Add(step);
}
public abstract void RemoveStep(AbstractQuest step);
public abstract void AddStep(AbstractQuest step);
