public static Connection <TSource> ToConnection <TSource, TParent>(
IEnumerable <TSource> slice,
IResolveConnectionContext <TParent> context,
int sliceStartIndex,
int totalCount,
bool strictCheck = true
)
{
var sliceList = slice as IList <TSource> ?? slice.ToList();
var metrics = ArraySliceMetrics.Create(
sliceList,
context,
sliceStartIndex,
totalCount,
strictCheck
);
var edges = metrics.Slice.Select((item, i) => new Edge <TSource>
{
Node = item,
Cursor = OffsetToCursor(metrics.StartOffset + i)
})
.ToList();
var firstEdge = edges.FirstOrDefault();
var lastEdge = edges.LastOrDefault();
return(new Connection <TSource>
{
Edges = edges,
TotalCount = totalCount,
PageInfo = new PageInfo
{
StartCursor = firstEdge?.Cursor,
EndCursor = lastEdge?.Cursor,
HasPreviousPage = metrics.HasPrevious,
HasNextPage = metrics.HasNext,
}
});
}
