Resolver for RequireJsNet to find Javascript nested in areas

AreaEntryPointResolver.cs

public class AreaEntryPointResolver : IEntryPointResolver
{
    public string Resolve(ViewContext viewContext, string entryPointRoot)
    {
        if (viewContext.RouteData.DataTokens["area"] == null)
            return null;
        
        var area = viewContext.RouteData.DataTokens["area"].ToString();
        var controller = viewContext.Controller.ValueProvider.GetValue("controller").RawValue as string;
        var action = viewContext.Controller.ValueProvider.GetValue("action").RawValue as string;
        var server = viewContext.HttpContext.Server;
        
        // search for scripts/controller/action.js in current area
        var entryPoint = "~/Areas/" + area + "/Scripts/" + controller + "/" + action + ".js";
        var filePath = server.MapPath(entryPoint);
        
        return File.Exists(filePath) ? UrlHelper.GenerateContentUrl(entryPoint, viewContext.HttpContext) : null;
    }
}