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();
}