public static IQueryable <TQuery> ApplySorting <TQuery>(this ISupportSorting sortingProvider, IQueryable <TQuery> query,
Func <IQueryable <TQuery>, IOrderedQueryable <TQuery> >?defaultSort = null)
{
if (sortingProvider.Sorting != null && sortingProvider.Sorting.Any())
{
var parameterExpression = Expression.Parameter(typeof(TQuery), "x");
var sortedSortItems = sortingProvider.Sorting
.OrderBy(x => x.Order.GetValueOrDefault(99));
IOrderedQueryable <TQuery>?ordered = null;
foreach (var sortItem in sortedSortItems)
{
ordered = ordered.Append(query, sortItem, parameterExpression);
}
query = ordered ?? query;
}
else if (defaultSort != null)
{
query = defaultSort(query);
}
return(query);
}