/// <summary>
/// Convert a base64 string to a continuation token.
/// </summary>
/// <param name="query">The <see cref="IContinuationQuery"/> to use.</param>
/// <returns>A <see cref="LimitOffsetContinuationToken"/>.</returns>
public static LimitOffsetContinuationToken FromContinuationQuery(IContinuationQuery query)
{
return(ContinuationToken.FromContinuationToken <LimitOffsetContinuationToken>(query.ContinuationToken)
?? new LimitOffsetContinuationToken {
Limit = query.Limit
});
}
public static IContinuationEnumerable <TEntity> ToContinuationEnumerable <TEntity>(this IEnumerable <TEntity> values, IContinuationQuery continuationQuery)
{
if (values is null)
{
throw new ArgumentNullException(nameof(values));
}
if (continuationQuery is null)
{
throw new ArgumentNullException(nameof(continuationQuery));
}
var pagination = LimitOffsetContinuationToken.FromContinuationQuery(continuationQuery);
var paginatedResults = values
.Select(x => new
{
Item = x,
TotalCount = values.Count(),
})
.Skip(pagination.Offset)
.Take(pagination.Limit)
.ToArray();
var totalCount = paginatedResults.FirstOrDefault()?.TotalCount ?? 0;
var items = paginatedResults.Select(x => x.Item).ToList();
return(new ContinuationEnumerable <TEntity>(
items,
(items.Count + pagination.Offset) < totalCount ? pagination.GetNextPageContinuationToken() : null));
}
