TemplateUnity/Assets/Scripts/Core/OptionHandler.cs

using System;
using TemplateUnity.MainMenu;
using UnityEngine;

namespace TemplateUnity.Core
{
    public class OptionHandler: MonoBehaviour
    {
        public static OptionHandler Instance { get; private set; }

        public event EventHandler OnAudiosettingChange;

        [SerializeField] private float maxVolume = 10;

        private const string SaveKeyWords = "TMP";

        private float _masterVolume;
        private float _musicVolume;
        private float _sfxVolume;
        
        private void Awake()
        {
            if (Instance)
            {
                Debug.LogWarning($"{typeof(OptionHandler)} already instantiated! {transform}");
                Destroy(gameObject);
                return;
            }
            
            Instance = this;
            
            _masterVolume = PlayerPrefs.GetFloat($"{SaveKeyWords}_MasterVolume", maxVolume);
            _musicVolume = PlayerPrefs.GetFloat($"{SaveKeyWords}_MusicVolume", maxVolume);
            _sfxVolume = PlayerPrefs.GetFloat($"{SaveKeyWords}_SfxVolume", maxVolume);
        }

        private void Start()
        {
            DontDestroyOnLoad(gameObject.transform);

            UIOptionSection.onAnyMasterVolumeValueChanged += (_, amount) =>
            {
                _masterVolume = amount;
                PlayerPrefs.SetFloat($"{SaveKeyWords}_MasterVolume", amount);
                OnAudiosettingChange?.Invoke(this, EventArgs.Empty);
            };
            
            UIOptionSection.onAnyMusicVolumeValueChanged += (_, amount) =>
            {
                _musicVolume = amount;
                PlayerPrefs.SetFloat($"{SaveKeyWords}_MusicVolume", amount);
                OnAudiosettingChange?.Invoke(this, EventArgs.Empty);
            };
            
            UIOptionSection.onAnySfxVolumeValueChanged += (_, amount) =>
            {
                _sfxVolume = amount;
                PlayerPrefs.SetFloat($"{SaveKeyWords}_SfxVolume", amount);
                OnAudiosettingChange?.Invoke(this, EventArgs.Empty);
            };
        }
        
        public float MaxVolume => maxVolume;
        public float MasterVolume => _masterVolume;
        public float MusicVolume => _musicVolume;
        public float SfxVolume => _sfxVolume;
    }
}