PreviewPageHelper.cs

public class PreviewPageHelper(
    IContentRepository repo,
    IContentVersionRepository versions,
    IContextModeResolver modes,
    IHttpContextAccessor http)
{
    private bool IsDraftView
    {
        get
        {
            var ctx = http.HttpContext;
            var hasParam = ctx?.Request?.Query.TryGetValue("showdrafts", out var val) == true
                           && val.ToString().Equals("true", System.StringComparison.OrdinalIgnoreCase);

            //var user = ctx?.User;
            //var isEditor = user?.IsInRole("CmsEditors") == true || user?.IsInRole("CmsAdmins") == true;

            return (hasParam 
                    //&& isEditor
                    )
                   || modes.CurrentMode == ContextMode.Edit
                   || modes.CurrentMode == ContextMode.Preview;
        }
    }

    public T GetPage<T>(ContentReference pageRef) where T : PageData
    {
        if (ContentReference.IsNullOrEmpty(pageRef)) return null;

        if (IsDraftView)
        {
            var latest = versions.List(pageRef)
                .OrderByDescending(v => v.Saved)
                .FirstOrDefault();

            if (latest != null && repo.TryGet<T>(latest.ContentLink, out var latestPage))
            {
                return latestPage;
            }
        }

        return repo.TryGet<T>(pageRef, out var publishedPage) ? publishedPage : null;
    }
}