71 lines
3.1 KiB
C#
71 lines
3.1 KiB
C#
using JSMR.Application.Tags.Queries.Search.Contracts;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Text;
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using System.Threading.Tasks;
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namespace JSMR.Application.Common.Search;
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//public abstract class SearchReader2<TItem, TCriteria, TSortField> : ISearchReader<TItem, TCriteria, TSortField>
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// where TSortField : struct, Enum
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//{
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// public Task<SearchResult<TItem>> SearchAsync(SearchOptions<TCriteria, TSortField> options, CancellationToken cancellationToken = default)
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// {
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// throw new NotImplementedException();
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// }
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//}
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//public abstract class SearchReader<TSearchResultItem, TCriteria, TSortField> where TSortField : struct, Enum
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//{
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// public async Task<SearchResult<TSearchResultItem>> SearchAsync(SearchOptions<TCriteria, TSortField> options, CancellationToken cancellationToken = default)
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// {
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// IQueryable<TSearchResultItem> baseQuery = GetBaseQuery();
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// IQueryable<TSearchResultItem> filteredQuery = ApplyFilters(baseQuery, options);
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// int total = await filteredQuery.CountAsync(cancellationToken);
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// IOrderedQueryable<TSearchResultItem> orderedQuery = ApplySorting(filteredQuery, options);
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// TSearchResultItem[] items = await orderedQuery
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// .Skip((options.PageNumber - 1) * options.PageSize)
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// .Take(options.PageSize)
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// .ToArrayAsync(cancellationToken);
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// return new SearchResult<TSearchResultItem>()
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// {
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// Items = items,
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// TotalItems = total
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// };
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// }
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// protected abstract IQueryable<TSearchResultItem> GetBaseQuery();
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// protected abstract IQueryable<TSearchResultItem> ApplyFilters(IQueryable<TSearchResultItem> query, SearchOptions<TCriteria, TSortField> options);
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// private IOrderedQueryable<TSearchResultItem> ApplySorting(IQueryable<TSearchResultItem> query, SearchOptions<TCriteria, TSortField> options)
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// {
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// IOrderedQueryable<TSearchResultItem>? ordered = null;
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// for (int i = 0; i < options.SortOptions.Length; i++)
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// {
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// var (field, direction) = (options.SortOptions[i].Field, options.SortOptions[i].Direction);
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// bool isDescending = direction == SortDirection.Descending;
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// IOrderedQueryable<TSearchResultItem> applyFirst(Expression<Func<TSearchResultItem, object>> selector) => isDescending ? query.OrderByDescending(selector) : query.OrderBy(selector);
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// IOrderedQueryable<TSearchResultItem> applyNext(Expression<Func<TSearchResultItem, object>> selector) => isDescending ? ordered!.ThenByDescending(selector) : ordered!.ThenBy(selector);
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// Expression<Func<TSearchResultItem, object>> selector = GetSortExpression(field);
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// ordered = (i == 0) ? applyFirst(selector) : applyNext(selector);
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// }
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// return ordered ?? GetDefaultSortExpression(query);
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// }
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// protected abstract Expression<Func<TSearchResultItem, object>> GetSortExpression(TSortField field);
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// protected abstract IOrderedQueryable<TSearchResultItem> GetDefaultSortExpression(IQueryable<TSearchResultItem> query);
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//} |