Initial commit

2021-02-08 21:13:53 -06:00
commit 4d52e115b5
493 changed files with 31399 additions and 0 deletions
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+using System.Threading;
+using System.Threading.Tasks;
+using ErsatzTV.Core;
+using ErsatzTV.Core.Interfaces.Repositories;
+using LanguageExt;
+using MediatR;
+
+namespace ErsatzTV.Application.MediaItems.Commands
+{
+    public class DeleteMediaItemHandler : IRequestHandler<DeleteMediaItem, Either<BaseError, Task>>
+    {
+        private readonly IMediaItemRepository _mediaItemRepository;
+
+        public DeleteMediaItemHandler(IMediaItemRepository mediaItemRepository) =>
+            _mediaItemRepository = mediaItemRepository;
+
+        public async Task<Either<BaseError, Task>> Handle(
+            DeleteMediaItem request,
+            CancellationToken cancellationToken) =>
+            (await MediaItemMustExist(request))
+            .Map(DoDeletion)
+            .ToEither<Task>();
+
+        private Task DoDeletion(int mediaItemId) => _mediaItemRepository.Delete(mediaItemId);
+
+        private async Task<Validation<BaseError, int>> MediaItemMustExist(DeleteMediaItem deleteMediaItem) =>
+            (await _mediaItemRepository.Get(deleteMediaItem.MediaItemId))
+            .ToValidation<BaseError>($"MediaItem {deleteMediaItem.MediaItemId} does not exist.")
+            .Map(c => c.Id);
+    }
+}