/// <summary>
/// Returns true when there is more data after the list.
/// </summary>
/// <typeparam name="T">The type of the elements of source.</typeparam>
/// <typeparam name="T2">The type of the elements of the data.</typeparam>
/// <param name="context">The <see cref="KeysetPaginationContext{T}"/> object.</param>
/// <param name="data">The data list.</param>
public static Task <bool> HasNextAsync <T, T2>(
this KeysetPaginationContext <T> context,
IReadOnlyList <T2> data)
where T : class
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (!data.Any())
{
return(Task.FromResult(false));
}
// Get last item and see if there's anything after it.
var reference = data[^ 1] !;
/// <summary>
/// Returns true when there is more data before the list.
/// </summary>
/// <typeparam name="T">The type of the elements of source.</typeparam>
/// <typeparam name="T2">The type of the elements of the data.</typeparam>
/// <param name="context">The <see cref="KeysetPaginationContext{T}"/> object.</param>
/// <param name="data">The data list.</param>
public static Task <bool> HasPreviousAsync <T, T2>(
this KeysetPaginationContext <T> context,
IReadOnlyList <T2> data)
where T : class
{
if (data == null)
{
throw new ArgumentNullException(nameof(data));
}
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (!data.Any())
{
return(Task.FromResult(false));
}
// Get first item and see if there's anything before it.
var reference = data[0] !;
return(HasAsync(context, KeysetPaginationDirection.Backward, reference));
}
