59 lines
1.7 KiB
C#
59 lines
1.7 KiB
C#
using Microsoft.EntityFrameworkCore;
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using DD.Persistence.Models.Requests;
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using DD.Persistence.Models.Common;
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using DD.Persistence.ModelsAbstractions;
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using DD.Persistence.Database.EntityAbstractions;
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using DD.Persistence.Extensions;
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namespace DD.Persistence.Repository;
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/// <summary>
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/// класс с набором методов, необходимых для фильтрации записей
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/// </summary>
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public static class QueryBuilders
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{
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public static IQueryable<TEntity> Apply<TEntity>(this IQueryable<TEntity> query, DateTimeOffset momentUtc)
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where TEntity : class, IChangeLog
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{
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momentUtc = momentUtc.ToUniversalTime();
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query = query
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.Where(e => e.Creation <= momentUtc)
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.Where(e => e.Obsolete == null || e.Obsolete >= momentUtc);
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return query;
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}
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public static async Task<PaginationContainer<TDto>> ApplyPagination<TEntity, TDto>(
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this IQueryable<TEntity> query,
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PaginationRequest request,
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Func<TEntity, TDto> Convert,
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CancellationToken token)
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where TEntity : class
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where TDto : class
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{
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if (!String.IsNullOrEmpty(request.SortSettings))
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{
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query = query.SortBy(request.SortSettings);
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}
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var entities = await query
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.Skip(request.Skip)
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.Take(request.Take)
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.ToArrayAsync(token);
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var count = await query.CountAsync(token);
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var items = entities.Select(Convert);
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var result = new PaginationContainer<TDto>
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{
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Skip = request.Skip,
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Take = request.Take,
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Items = items,
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Count = count
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};
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return result;
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}
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}
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