Darklings-FightingGame/Assets/_Project/Scripts/UIScripts/MenuScripts/PatchNotesMenu.cs

using System.Collections;
using UnityEngine;

public class PatchNotesMenu : BaseMenu
{
    [SerializeField] private InputManager _inputManager = default;
    [SerializeField] private PromptsInput _homePrompts = default;
    [SerializeField] private RectTransform _scrollView = default;
    [SerializeField] private RectTransform _patchNotes = default;
    private readonly int _scrollSpeed = 350;
    private float bottomScrollLimit = 0.0f;
    private int _previousMenuIndex = 0;

    public void Back()
    {
        _inputManager.CurrentPrompts = _homePrompts;
        Hide();
    }

    public void SetPreviousMenuIndex(int index) => _previousMenuIndex = index;

    void Update() => Scroll();

    private void Scroll()
    {
        float movement = (_inputManager.NavigationInput.y * Time.deltaTime * _scrollSpeed) * -1;
        if (movement < 0 && _scrollView.anchoredPosition.y > 0 || movement > 0 && _scrollView.anchoredPosition.y <= bottomScrollLimit)
        {
            _scrollView.anchoredPosition += new Vector2(0.0f, movement);
            if (_scrollView.anchoredPosition.y < 0.0f)
            {
                _scrollView.anchoredPosition = new Vector2(0.0f, 0.0f);
            }
            else if (_scrollView.anchoredPosition.y > bottomScrollLimit)
            {
                _scrollView.anchoredPosition = new Vector2(0.0f, bottomScrollLimit);
            }
        }
    }

    void OnEnable() => _scrollView.anchoredPosition = Vector2.zero;

    void Start() => StartCoroutine(SetUpPatchNotesCoroutine());

    IEnumerator SetUpPatchNotesCoroutine()
    {
        yield return null;
        _patchNotes.anchoredPosition = new Vector2(0.0f, -(_patchNotes.rect.height / 2.0f));
        bottomScrollLimit = _patchNotes.rect.height - 300.0f;
        _scrollView.anchoredPosition = Vector2.zero;
    }
}