81 lines
3.8 KiB
C#
81 lines
3.8 KiB
C#
using System.Collections.Generic;
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namespace Engine.Core;
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public class UniverseEntranceManager : Internal.BehaviourIndependent
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{
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// We use Ascending order because we are using reverse for loop to call them
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private static Comparer<int> SortByAscendingPriority() => Comparer<int>.Create((x, y) => x.CompareTo(y));
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private static System.Func<IBehaviour, int> GetPriority() => (b) => b.Priority;
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private readonly ActiveBehaviourCollectorOrdered<int, IEnterUniverse> enterUniverses = new(GetPriority(), SortByAscendingPriority());
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private readonly ActiveBehaviourCollectorOrdered<int, IExitUniverse> exitUniverses = new(GetPriority(), SortByAscendingPriority());
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private readonly List<IEnterUniverse> toCallEnterUniverses = new(32);
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private readonly List<IExitUniverse> toCallExitUniverses = new(32);
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protected override void OnEnteredUniverse(IUniverse universe)
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{
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// FIXME: This causes an issue when the UniverseEntranceManager is already attached to a UniverseObject then registered into a Universe,
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// the enter/exit universe collectors call OnUniverseObjectRegistered internally on Assign, but since the Universe calls the OnUniverseObjectRegistered
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// event it tries to call OnUniverseObjectRegistered again on the same object, causing a duplicate entry error.
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Debug.Assert.AssertTrue(BehaviourController.Count == 1, $"{nameof(UniverseEntranceManager)} must be in it's own {nameof(IUniverseObject)} with no other {nameof(IBehaviour)}s attached at the moment. Failing to do so might cause instantiation or serialization issues.");
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enterUniverses.Assign(universe);
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exitUniverses.Assign(universe);
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foreach (IUniverseObject universeObject in universe)
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OnUniverseObjectRegistered(universe, new(universeObject));
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universe.OnUniverseObjectRegistered.AddListener(OnUniverseObjectRegistered);
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universe.OnUniverseObjectUnRegistered.AddListener(OnUniverseObjectUnRegistered);
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}
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protected override void OnExitedUniverse(IUniverse universe)
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{
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enterUniverses.Unassign();
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exitUniverses.Unassign();
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foreach (IUniverseObject universeObject in universe)
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OnUniverseObjectUnRegistered(universe, new(universeObject));
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universe.OnUniverseObjectRegistered.RemoveListener(OnUniverseObjectRegistered);
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universe.OnUniverseObjectUnRegistered.RemoveListener(OnUniverseObjectUnRegistered);
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}
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private void OnUniverseObjectUnRegistered(IUniverse sender, IUniverse.UniverseObjectUnRegisteredArguments args)
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{
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for (int i = toCallExitUniverses.Count - 1; i >= 0; i--)
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{
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IExitUniverse exitUniverse = toCallExitUniverses[i];
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toCallExitUniverses.RemoveAt(i);
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exitUniverse.ExitUniverse(Universe);
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}
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}
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private void OnUniverseObjectRegistered(IUniverse sender, IUniverse.UniverseObjectRegisteredArguments args)
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{
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for (int i = toCallEnterUniverses.Count - 1; i >= 0; i--)
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{
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IEnterUniverse enterUniverse = toCallEnterUniverses[i];
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toCallEnterUniverses.RemoveAt(i);
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enterUniverse.EnterUniverse(Universe);
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}
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}
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private void OnEnterUniverseCollected(IBehaviourCollector<IEnterUniverse> sender, IBehaviourCollector<IEnterUniverse>.BehaviourCollectedArguments args)
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{
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toCallEnterUniverses.Add(args.BehaviourCollected);
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}
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private void OnExitUniverseCollected(IBehaviourCollector<IExitUniverse> sender, IBehaviourCollector<IExitUniverse>.BehaviourCollectedArguments args)
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{
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toCallExitUniverses.Add(args.BehaviourCollected);
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}
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public UniverseEntranceManager()
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{
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enterUniverses.OnCollected.AddListener(OnEnterUniverseCollected);
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exitUniverses.OnCollected.AddListener(OnExitUniverseCollected);
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}
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}
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