feat: BehaviourCacher<T>
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using System;
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using System.Collections.Generic;
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using Syntriax.Engine.Core.Abstract;
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namespace Syntriax.Engine.Core;
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public class BehaviourCacher<T> : IAssignableGameManager where T : IBehaviour
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{
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public Action<IAssignable>? OnUnassigned { get; set; } = null;
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public Action<IAssignableGameManager>? OnGameManagerAssigned { get; set; } = null;
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public Action<BehaviourCacher<T>, T>? OnCached { get; set; } = null;
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public Action<BehaviourCacher<T>, T>? OnUncached { get; set; } = null;
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private readonly List<T> _behaviours = new(32);
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public IReadOnlyList<T> Behaviours => _behaviours;
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public IGameManager GameManager { get; private set; } = null!;
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public BehaviourCacher() { }
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public BehaviourCacher(IGameManager gameManager) => Assign(gameManager);
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private void OnGameObjectRegistered(GameManager manager, IGameObject gameObject)
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{
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gameObject.BehaviourController.OnBehaviourAdded += OnBehaviourAdded;
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gameObject.BehaviourController.OnBehaviourRemoved += OnBehaviourRemoved;
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}
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private void OnGameObjectUnregistered(GameManager manager, IGameObject gameObject)
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{
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gameObject.BehaviourController.OnBehaviourAdded -= OnBehaviourAdded;
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gameObject.BehaviourController.OnBehaviourRemoved -= OnBehaviourRemoved;
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}
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private void OnBehaviourAdded(IBehaviourController controller, IBehaviour behaviour)
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{
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if (behaviour is not T tBehaviour)
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return;
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_behaviours.Add(tBehaviour);
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OnCached?.Invoke(this, tBehaviour);
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}
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private void OnBehaviourRemoved(IBehaviourController controller, IBehaviour behaviour)
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{
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if (behaviour is not T tBehaviour)
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return;
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if (!_behaviours.Remove(tBehaviour))
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return;
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OnUncached?.Invoke(this, tBehaviour);
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}
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public bool Assign(IGameManager gameManager)
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{
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if (GameManager is not null)
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return false;
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gameManager.OnGameObjectRegistered += OnGameObjectRegistered;
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gameManager.OnGameObjectUnRegistered += OnGameObjectUnregistered;
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GameManager = gameManager;
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return true;
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}
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public bool Unassign()
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{
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if (GameManager is null)
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return false;
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GameManager.OnGameObjectRegistered -= OnGameObjectRegistered;
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GameManager.OnGameObjectUnRegistered -= OnGameObjectUnregistered;
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GameManager = null!;
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return true;
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}
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}
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