projectEli/Assets/Inventory System/Scripts/Inventory/TargetAttachment.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

namespace SimpleInventorySystem
{
    public class TargetAttachment : MonoBehaviour
    {
        public ItemTags itemTag;
        private GameObject itemGameObject;
        public Vector3 position;
        public Vector3 rotation;
        public Vector3 scale = Vector3.one;
        public bool hideGameObject;
        public bool KeepOldRotationOnDrop;
        private Vector3 oldRotation = new Vector3();

        public bool AttachItemGameObject(GameObject go, ItemTags targetItemTag, PickUp pickUp)
        {
            if (itemTag == targetItemTag || itemTag == ItemTags.Any)
            {
                itemGameObject = go;

                if (hideGameObject)
                {
                    itemGameObject.SetActive(false);
                    return true;
                }

                oldRotation = go.transform.localRotation.eulerAngles;

                go.transform.SetParent(transform, false);
                if(pickUp == null)
                {
                    go.transform.localPosition = position;
                    go.transform.localRotation = Quaternion.Euler(rotation);
                    go.transform.localScale = scale;
                }
                else
                {
                    pickUp.AlterItemGameObjectTransform();
                }
                // TODO: possibly handle transform rotations, scales, etc.
                return true;
            }
            return false;
        }

        public void DetachItemGameObject(GameObject go)
        {
            if (hideGameObject)
            {
                if (itemGameObject == null)
                {
                    Debug.LogError($"TargetAttachment: Item Game Object is null, please correctly set up your Item with a PickUp. Game Object name: {itemGameObject.name}");
                }
                else
                {
                    itemGameObject.SetActive(true);
                }
            }
            itemGameObject = null;
            // TODO: Most likely, implement drop here.
            go.transform.SetParent(null, true);
            go.transform.localRotation = Quaternion.Euler(oldRotation);
        }
    }

}