public static SortedQueryable <T> WithSorting <T>(this IQueryable <T> source, SortingHeader sortingHeader, ISorting sorting)
{
var validatedSortingHeader = DetermineSortingHeader <T>(sortingHeader, sorting);
var orderedQueryable = validatedSortingHeader.SortOrder == SortOrder.Ascending
? source.OrderBy(validatedSortingHeader.SortBy)
: source.OrderByDescending(validatedSortingHeader.SortBy);
return(new SortedQueryable <T>(orderedQueryable, validatedSortingHeader));
}
private static bool SortingFieldSpecified(SortingHeader sortingHeader, ISorting sorting)
{
return(sortingHeader.ShouldSort &&
sorting.SortableFields.Contains(sortingHeader.SortBy, StringComparer.OrdinalIgnoreCase));
}
private static SortingHeader DetermineSortingHeader <T>(SortingHeader sortingHeader, ISorting sorting)
{
return(SortingFieldSpecified(sortingHeader, sorting)
? sortingHeader
: sorting.DefaultSortingHeader);
}
/// <summary>Add the 'x-sorting' response header</summary>
public static void AddSortingResponse(this HttpResponse response, string sortBy, SortOrder sortOrder)
{
var sortingHeader = new SortingHeader(sortBy.ToLowerInvariant(), sortOrder);
response.Headers.Add(HeaderName, JsonConvert.SerializeObject(sortingHeader));
}
/// <summary>Add the 'x-sorting' response header</summary> public static void AddSortingResponse(this HttpResponse response, SortingHeader sortingHeader) => response.AddSortingResponse(sortingHeader.SortBy, sortingHeader.SortOrder);
public SortedQueryable(IQueryable <T> items, SortingHeader sortingHeader)
{
Items = items;
Sorting = sortingHeader;
}