public static async Task <CatalogViewModel> CreateAsync(ViewFilter <ProductItem> viewFilter, IQueryable <ProductItem> source, int pageIndex, string sortOrder)
{
double max = default;
PaginatedList <ProductItem> paginateProductItems = default;
if (source != null && source.Any())
{
max = await source.MaxAsync(p => p.Price);
var filteredSource = viewFilter.Filter(source);
var sortedSource = SortOrder <ProductItem> .Create(filteredSource, sortOrder);
paginateProductItems = await PaginatedList <ProductItem> .CreateAsync(sortedSource, pageIndex, pageSize);
}
return(new CatalogViewModel(viewFilter, source, paginateProductItems, max));
}
