Added a base class for item behaviour

Assets/Scripts/Game/Items/ItemBehaviour.cs

@@ -0,0 +1,105 @@
+using System;
+using Fruitomation.Global;
+using UnityEngine;
+
+namespace Fruitomation.Game.Items
+{
+    public enum ItemType
+    {
+        Apple,
+        Grape,
+        Banana,
+        Kiwi,
+        Mango,
+        Pitaya,
+        Durian,
+        BuddhasHand
+    }
+    
+    public class ItemBehaviour : MonoBehaviour
+    {
+        protected RectTransform RectTransform { get; private set; }
+        protected Rigidbody2D Body2D { get; private set; }
+        protected Canvas AttachedCanvas { get; private set; }
+        protected bool EnteredCanvas { get; private set; }
+
+        private ItemType InternalItemType;
+
+        public ItemType CurrentType
+        {
+            get => InternalItemType;
+            set
+            {
+                InternalItemType = value;
+            }
+        }
+        
+        protected virtual void OnInitialized() { }
+        
+        public void InitBehaviour(Canvas canvas)
+        {
+            RectTransform = transform.GetComponent<RectTransform>();
+            Body2D = transform.GetComponent<Rigidbody2D>();
+            
+            AttachedCanvas = canvas;
+            EnteredCanvas = false;
+            
+            OnInitialized();
+        }
+
+        private void UpdateItem()
+        {
+        }
+
+        protected void Update()
+        {
+            if (!GameStateController.Is(GameState.Simulation))
+            {
+                TriggerDestruction(false);
+            }
+        }
+
+        private void FixedUpdate()
+        {
+            bool contained = IsWithinCanvas(RectTransform, AttachedCanvas.GetComponent<RectTransform>());
+            EnteredCanvas = EnteredCanvas || contained;
+
+            if (!contained && EnteredCanvas)
+            {
+                TriggerDestruction();
+            }
+        }
+
+        private static bool IsWithinCanvas(RectTransform element, RectTransform canvas)
+        {
+            Vector3[] elementCorners = new Vector3[4];
+            Vector3[] canvasCorners = new Vector3[4];
+
+            element.GetWorldCorners(elementCorners);
+            canvas.GetWorldCorners(canvasCorners);
+
+            Rect bounds = new
+            (
+                canvasCorners[0].x,
+                canvasCorners[0].y,
+                canvasCorners[2].x - canvasCorners[0].x,
+                canvasCorners[2].y - canvasCorners[0].y
+            );
+
+            foreach (Vector3 corner in elementCorners)
+            {
+                if (bounds.Contains(corner))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public void TriggerDestruction(bool harvest = true)
+        {
+            Destroy(gameObject);
+        }
+    }
+}