private static string BuildLinkHeader(HttpRequestMessage request, PaginationInfo pi)
{
var path = request.RequestUri.AbsolutePath;
var buffer = new List<string>();
if (NeedsNextPage(pi))
{
buffer.Add(
string.Format(
CultureInfo.InvariantCulture,
"next: <{0}?page={1}&pageSize={2}>",
path,
pi.Page + 1,
pi.PageSize));
}
if (NeedsPreviousPage(pi))
{
buffer.Add(
string.Format(
CultureInfo.InvariantCulture,
"previous: <{0}?page={1}&pageSize={2}>",
path,
pi.Page - 1,
pi.PageSize));
}
if (NeedsLastPage(pi))
{
buffer.Add(
string.Format(
CultureInfo.InvariantCulture,
"last: <{0}?page={1}&pageSize={2}>",
path,
pi.TotalPages,
pi.PageSize));
}
return string.Join("; ", buffer.ToArray());
}
private static string BuildXPaginationHeader(PaginationInfo pi)
{
return JsonConvert.SerializeObject(pi, Formatting.None);
}
private static bool NeedsNextPage(PaginationInfo pi)
{
return pi.Page < pi.TotalPages;
}
private static bool NeedsPreviousPage(PaginationInfo pi)
{
return pi.Page > 1;
}
private static bool IsLastPage(PaginationInfo pi)
{
return pi.Page >= pi.TotalPages;
}
private static bool NeedsLastPage(PaginationInfo pi)
{
return NeedsNextPage(pi) && !IsLastPage(pi);
}