Stream custom live channels using your own media
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using System.Threading;
using System.Threading.Tasks;
using ErsatzTV.Core;
using ErsatzTV.Core.Domain;
using ErsatzTV.Infrastructure.Data;
using ErsatzTV.Infrastructure.Extensions;
using LanguageExt;
using Microsoft.EntityFrameworkCore;
namespace ErsatzTV.Application.MediaCollections.Commands
{
public class DeleteMultiCollectionHandler : MediatR.IRequestHandler<DeleteMultiCollection, Either<BaseError, Unit>>
{
private readonly IDbContextFactory<TvContext> _dbContextFactory;
public DeleteMultiCollectionHandler(IDbContextFactory<TvContext> dbContextFactory) =>
_dbContextFactory = dbContextFactory;
public async Task<Either<BaseError, Unit>> Handle(
DeleteMultiCollection request,
CancellationToken cancellationToken)
{
await using TvContext dbContext = _dbContextFactory.CreateDbContext();
Validation<BaseError, MultiCollection> validation = await MultiCollectionMustExist(dbContext, request);
return await validation.Apply(c => DoDeletion(dbContext, c));
}
private static Task<Unit> DoDeletion(TvContext dbContext, MultiCollection multiCollection)
{
dbContext.MultiCollections.Remove(multiCollection);
return dbContext.SaveChangesAsync().ToUnit();
}
private static Task<Validation<BaseError, MultiCollection>> MultiCollectionMustExist(
TvContext dbContext,
DeleteMultiCollection request) =>
dbContext.MultiCollections
.SelectOneAsync(c => c.Id, c => c.Id == request.MultiCollectionId)
.Map(o => o.ToValidation<BaseError>($"MultiCollection {request.MultiCollectionId} does not exist."));
}
}