47 lines
1.7 KiB
C#
47 lines
1.7 KiB
C#
using System.Collections.Generic;
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using System.Data;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using Dapper;
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using ErsatzTV.Infrastructure.Data;
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using LanguageExt;
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using MediatR;
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using Microsoft.EntityFrameworkCore;
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using static ErsatzTV.Application.MediaCollections.Mapper;
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namespace ErsatzTV.Application.MediaCollections.Queries
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{
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public class GetPagedCollectionsHandler : IRequestHandler<GetPagedCollections, PagedMediaCollectionsViewModel>
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{
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private readonly IDbConnection _dbConnection;
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private readonly IDbContextFactory<TvContext> _dbContextFactory;
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public GetPagedCollectionsHandler(IDbContextFactory<TvContext> dbContextFactory, IDbConnection dbConnection)
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{
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_dbContextFactory = dbContextFactory;
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_dbConnection = dbConnection;
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}
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public async Task<PagedMediaCollectionsViewModel> Handle(
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GetPagedCollections request,
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CancellationToken cancellationToken)
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{
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int count = await _dbConnection.QuerySingleAsync<int>(@"SELECT COUNT (*) FROM Collection");
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await using TvContext dbContext = _dbContextFactory.CreateDbContext();
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List<MediaCollectionViewModel> page = await dbContext.Collections.FromSqlRaw(
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@"SELECT * FROM Collection
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ORDER BY Name
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COLLATE NOCASE
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LIMIT {0} OFFSET {1}",
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request.PageSize,
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request.PageNum * request.PageSize)
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.ToListAsync(cancellationToken)
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.Map(list => list.Map(ProjectToViewModel).ToList());
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return new PagedMediaCollectionsViewModel(count, page);
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}
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}
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}
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