public async Task <ActionResult> Index(int?page, string searchText)
        {
            var totalIngredients = await _ingredientsRepository.GetTotalCountAsync(searchText);

            Pager pager = new Pager(totalIngredients, page);

            var ingredients = _ingredientsRepository.GetAll(searchText)
                              .Skip((pager.CurrentPage - 1) * pager.PageSize)
                              .Take(pager.PageSize);

            var viewModel = new IngredientsIndexViewModel()
            {
                Ingredients = ingredients,
                Pager       = pager,
                SearchText  = searchText
            };

            return(View(viewModel));
        }