slowpoker/Assets/Scripts/Player/Interactions.cs

using Interactive;
using UnityEngine;

namespace Player
{
    public class Interactions : MonoBehaviour
    {
        public float maxHitDistance = 5f;
        public bool canInteract;

        private Camera _cam;
        private RaycastHit _hit;
        private int _playerLayerMask, _defaultLayerMask;
        private IInteractable _observableObject;

        void Start()
        {
            _cam = Camera.main;
            _playerLayerMask = LayerMask.GetMask("Player");
            _defaultLayerMask = LayerMask.GetMask("Default");
        }
 
        void Update()
        {
            Ray ray = _cam.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0));
            Interact(ray);
        }

        void Interact(Ray ray)
        {
            if (Physics.Raycast(ray, out _hit, maxHitDistance, _defaultLayerMask))
            {
                IInteractable interactable = _hit.transform.gameObject.GetComponent<IInteractable>();
                canInteract = interactable != null;

                if (canInteract)
                {
                    if (_observableObject != interactable)
                    {
                        _observableObject?.LookOut();
                        interactable.LookAt();
                    }
                    
                    if(Input.GetKeyDown(KeyCode.E))
                    {
                        interactable.Interact();
                    }
                } 
                else
                {
                    if (_observableObject != interactable)
                    {
                        _observableObject?.LookOut();
                    }
                }
                
                _observableObject = interactable;
            }
            else
            {
                canInteract = false;
            }
        }
    }
}