MedievalParty/Assets/Scripts/MainMenu/MainSection/UI_MainSection.cs

using System;
using UnityEngine;
using UnityEngine.UI;

namespace MedievalParty.MainMenu.MainSection
{
    public class UI_MainSection: MonoBehaviour
    {
        public static UI_MainSection Instance { get; private set; }

        public event EventHandler onNewGameTrigger;
        public event EventHandler onContinueTrigger;
        public event EventHandler onOptionTrigger;
        public event EventHandler onQuitTrigger;
        
        [SerializeField] private Button newGameButton;
        [SerializeField] private Button continueButton;
        [SerializeField] private Button optionButton;
        [SerializeField] private Button quitButton;

        private void Awake()
        {
            if (Instance)
            {
                Debug.LogWarning($"{typeof(UI_MainSection)} already exist! {transform}");
                Destroy(gameObject);
                return;
            }

            Instance = this;
        }

        private void Start()
        {
            newGameButton.onClick.AddListener(() => onNewGameTrigger?.Invoke(this, EventArgs.Empty));
            continueButton.onClick.AddListener(() => onContinueTrigger?.Invoke(this, EventArgs.Empty));
            optionButton.onClick.AddListener(() => onOptionTrigger?.Invoke(this, EventArgs.Empty));
            quitButton.onClick.AddListener(() => onQuitTrigger?.Invoke(this, EventArgs.Empty));

            MainMenuManager.Instance.onSectionChange +=
                (_, section) => gameObject.SetActive(section == MainMenuManager.Section.Main);
            
            gameObject.SetActive(false);
        }
    }
}