Added project

Platformer/Assets/Scripts/ItemBase.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+[CreateAssetMenu(fileName = "New Item Database", menuName = "Databases/Items")]
+public class ItemBase : ScriptableObject {
+
+    [SerializeField, HideInInspector] private List<Item> items;
+    [SerializeField] private Item currentItem;
+    private int currentIndex;
+
+    public void CreateItem() {
+        if (items == null) {
+            items = new List<Item>();
+        }
+        var item = new Item();
+        items.Add(item);
+        currentItem = item;
+        currentIndex = items.Count - 1;
+    }
+
+    public void RemoveItem() {
+        if (items == null || currentItem == null) {
+            return;
+        }
+        items.Remove(currentItem);
+        if (items.Count > 0) {
+            currentItem = items[0];
+        } else {
+            CreateItem();
+        }
+        currentIndex = 0;
+    }
+
+    public void NextItem() {
+        if (currentIndex + 1 < items.Count) {
+            currentIndex++;
+            currentItem = items[currentIndex];
+        }
+    }
+
+    public void PrevItem() {
+        if (currentIndex > 0) {
+            currentIndex--;
+            currentItem = items[currentIndex];
+        }
+    }
+
+    public Item GetItemOfId(int id) {
+        return items.Find(t => t.Id == id);
+    }
+
+}
+
+[System.Serializable]
+public class Item {
+
+    [SerializeField] private int id;
+    public int Id => id;
+
+    [SerializeField] private string itemName;
+    public string ItemName => itemName; 
+    
+    [SerializeField] private string description;
+    public string Description => description;
+
+    [SerializeField] private Sprite icon;
+    public Sprite Icon => icon;
+    
+    [SerializeField] private BuffType type;
+    public BuffType Type => type; 
+    
+    [SerializeField] private float value;
+    public float Value => value;
+
+    public override string ToString() {
+        return $"[id: {id}, itemName: {itemName}, description: {description}, type: {type.ToString()}, value {value}";
+    }
+}