SoftwareArch-Shop/Assets/Scripts/Shop/Components/InventoryMoneyDisplay.cs

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

/// <summary>
/// This class' only purpose is to set the class of an item view prototype. Could be the item itself, or the infobox, or anything!
/// </summary>
[RequireComponent(typeof(TextMeshProUGUI))]
public class InventoryMoneyDisplay : MonoBehaviour,IShopModelObserver<Item>
{
    private TextMeshProUGUI text;
    private void Start()
    {
        text = GetComponent<TextMeshProUGUI>();     // Because of the meta tag, Unity will make sure this exists. No sanity checks
    }

    public void SetMoney(int balance)
    {
        if(text == null) text = GetComponent<TextMeshProUGUI>();  // Just in case this gets called before Start()
        text.text = balance.ToString();
    }

    // This is why it's probably better to split this into two interfaces, but oh well
    public void OnSelected(Item item)
    {
        //throw new NotImplementedException();
    }

    public void OnRemoved(Item item)
    {
        //throw new NotImplementedException();
    }

    public void OnAdded(Item item)
    {
        //throw new NotImplementedException();
    }

    public void OnTransaction(int balance)
    {
        SetMoney(balance);
    }
}