private List <T> GetEdgesToReturn(
IQueryable <T> allEdges,
QueryablePagingDetails pagingDetails,
out int offset)
{
IQueryable <T> edges = ApplyCursorToEdges(
allEdges, pagingDetails.Before, pagingDetails.After);
offset = 0;
if (pagingDetails.After.HasValue)
{
offset = pagingDetails.After.Value + 1;
}
if (pagingDetails.First.HasValue)
{
edges = GetFirstEdges(
edges, pagingDetails.First.Value,
ref offset);
}
if (pagingDetails.Last.HasValue)
{
edges = GetLastEdges(
edges, pagingDetails.Last.Value,
ref offset);
}
return(edges.ToList());
}
/// <summary>
/// Get paging edgess
/// </summary>
/// <param name="allEdges">Edges</param>
/// <param name="pagingDetails">Paging details</param>
/// <returns>List of edges</returns>
private List <T> GetEdgesToReturn(IQueryable <T> allEdges,
QueryablePagingDetails pagingDetails)
{
IQueryable <T> edges = ApplySkipTakeToEdges(allEdges,
pagingDetails.Limit,
pagingDetails.Offset);
return(edges.ToList());
}
public QueryableConnectionResolver(IQueryable <T> source,
PaginationDetails paginationDetails)
{
if (paginationDetails == null)
{
throw new ArgumentNullException(nameof(paginationDetails));
}
_source = source ?? throw new ArgumentNullException(nameof(source));
_pageDetails = DeserializePagingDetails(paginationDetails);
_properties = paginationDetails.Properties
?? new Dictionary <string, object>();
}
/// <summary>
/// Creates a connection object
/// </summary>
/// <returns>Connection</returns>
private Connection <T> Create()
{
if (!_pageDetails.TotalCount.HasValue)
{
_pageDetails.TotalCount = _source.Count();
}
_properties[_totalCount] = _pageDetails.TotalCount.Value;
IReadOnlyList <QueryableEdge <T> > selectedEdges = GetSelectedEdges();
var pageInfo = new QueryablePagingDetails(_pageDetails.TotalCount,
_pageDetails.PageNumber,
_pageDetails.Limit);
return(new Connection <T>(pageInfo, selectedEdges));
}
