89 lines
2.9 KiB
C#
89 lines
2.9 KiB
C#
using Syntriax.Engine.Core.Abstract;
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using Syntriax.Engine.Core.Exceptions;
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namespace Syntriax.Engine.Core;
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[System.Diagnostics.DebuggerDisplay("{GetType().Name, nq}, Priority: {Priority}, Initialized: {Initialized}")]
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public abstract class BehaviourBase : BaseEntity, IBehaviour
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{
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public event IHasBehaviourController.BehaviourControllerAssignedEventHandler? OnBehaviourControllerAssigned = null;
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public event IBehaviour.PriorityChangedEventHandler? OnPriorityChanged = null;
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public event IActive.ActiveChangedEventHandler? OnActiveChanged = null;
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private IBehaviourController _behaviourController = null!;
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public IBehaviourController BehaviourController => _behaviourController;
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private int _priority = 0;
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public int Priority
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{
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get => _priority;
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set
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{
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if (value == _priority)
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return;
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int previousPriority = _priority;
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_priority = value;
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OnPriorityChanged?.Invoke(this, previousPriority);
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}
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}
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public bool IsActive { get; private set; } = false;
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protected virtual void OnAssign(IBehaviourController behaviourController) { }
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public bool Assign(IBehaviourController behaviourController)
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{
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if (IsInitialized)
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return false;
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_behaviourController = behaviourController;
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OnAssign(behaviourController);
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behaviourController.OnHierarchyObjectAssigned += OnHierarchyObjectAssigned;
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if (behaviourController.HierarchyObject is not null)
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OnHierarchyObjectAssigned(behaviourController);
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OnBehaviourControllerAssigned?.Invoke(this);
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return true;
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}
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private void OnHierarchyObjectAssigned(IHasHierarchyObject sender)
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{
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sender.HierarchyObject.OnActiveChanged += OnHierarchyObjectActiveChanged;
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UpdateActive();
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}
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protected override void OnAssign(IStateEnable stateEnable)
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{
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base.OnAssign(stateEnable);
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stateEnable.OnEnabledChanged += OnStateEnabledChanged;
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}
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protected override void UnassignInternal()
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{
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StateEnable.OnEnabledChanged -= OnStateEnabledChanged;
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BehaviourController.OnHierarchyObjectAssigned -= OnHierarchyObjectAssigned;
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base.UnassignInternal();
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_behaviourController = null!;
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}
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protected override void InitializeInternal()
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{
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base.InitializeInternal();
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NotAssignedException.Check(this, _behaviourController);
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NotAssignedException.Check(this, StateEnable);
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}
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private void OnStateEnabledChanged(IStateEnable sender, bool previousState) => UpdateActive();
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private void OnHierarchyObjectActiveChanged(IActive sender, bool previousState) => UpdateActive();
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private void UpdateActive()
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{
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bool previousActive = IsActive;
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IsActive = StateEnable.Enabled && _behaviourController.HierarchyObject.IsActive;
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if (previousActive != IsActive)
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OnActiveChanged?.Invoke(this, previousActive);
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}
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}
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