| | | 1 | | namespace Pozitron.QuerySpecification; |
| | | 2 | | |
| | | 3 | | public static class IQueryableExtensions |
| | | 4 | | { |
| | | 5 | | public static IQueryable<TSource> WithSpecification<TSource>( |
| | | 6 | | this IQueryable<TSource> source, |
| | | 7 | | Specification<TSource> specification, |
| | | 8 | | SpecificationEvaluator? evaluator = null) |
| | | 9 | | where TSource : class |
| | | 10 | | { |
| | 3 | 11 | | evaluator ??= SpecificationEvaluator.Default; |
| | 3 | 12 | | return evaluator.Evaluate(source, specification); |
| | | 13 | | } |
| | | 14 | | |
| | | 15 | | public static IQueryable<TResult> WithSpecification<TSource, TResult>( |
| | | 16 | | this IQueryable<TSource> source, |
| | | 17 | | Specification<TSource, TResult> specification, |
| | | 18 | | SpecificationEvaluator? evaluator = null) |
| | | 19 | | where TSource : class |
| | | 20 | | { |
| | 5 | 21 | | evaluator ??= SpecificationEvaluator.Default; |
| | 5 | 22 | | return evaluator.Evaluate(source, specification); |
| | | 23 | | } |
| | | 24 | | |
| | | 25 | | public static Task<PagedResult<TSource>> ToPagedResultAsync<TSource>( |
| | | 26 | | this IQueryable<TSource> source, |
| | | 27 | | PagingFilter filter, |
| | | 28 | | CancellationToken cancellationToken = default) |
| | | 29 | | where TSource : class |
| | 2 | 30 | | => ToPagedResultAsync(source, filter, PaginationSettings.Default, cancellationToken); |
| | | 31 | | |
| | | 32 | | public static async Task<PagedResult<TSource>> ToPagedResultAsync<TSource>( |
| | | 33 | | this IQueryable<TSource> source, |
| | | 34 | | PagingFilter filter, |
| | | 35 | | PaginationSettings paginationSettings, |
| | | 36 | | CancellationToken cancellationToken = default) |
| | | 37 | | where TSource : class |
| | | 38 | | { |
| | 3 | 39 | | var count = await source.CountAsync(cancellationToken); |
| | 3 | 40 | | var pagination = new Pagination(paginationSettings, count, filter); |
| | | 41 | | |
| | 3 | 42 | | source = source.ApplyPaging(pagination); |
| | | 43 | | |
| | 3 | 44 | | var data = await source.ToListAsync(cancellationToken); |
| | | 45 | | |
| | 3 | 46 | | return new PagedResult<TSource>(data, pagination); |
| | 3 | 47 | | } |
| | | 48 | | } |