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.Collections.Generic;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
+using ErsatzTV.Application.MediaItems;
+using ErsatzTV.Core;
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Interfaces.Repositories;
+using LanguageExt;
+using LanguageExt.UnsafeValueAccess;
+using MediatR;
+
+namespace ErsatzTV.Application.MediaCollections.Commands
+{
+    public class ReplaceSimpleMediaCollectionItemsHandler : IRequestHandler<ReplaceSimpleMediaCollectionItems,
+        Either<BaseError, List<MediaItemViewModel>>>
+    {
+        private readonly IMediaCollectionRepository _mediaCollectionRepository;
+        private readonly IMediaItemRepository _mediaItemRepository;
+
+        public ReplaceSimpleMediaCollectionItemsHandler(
+            IMediaCollectionRepository mediaCollectionRepository,
+            IMediaItemRepository mediaItemRepository)
+        {
+            _mediaCollectionRepository = mediaCollectionRepository;
+            _mediaItemRepository = mediaItemRepository;
+        }
+
+        public Task<Either<BaseError, List<MediaItemViewModel>>> Handle(
+            ReplaceSimpleMediaCollectionItems request,
+            CancellationToken cancellationToken) =>
+            Validate(request)
+                .MapT(mediaItems => PersistItems(request, mediaItems))
+                .Bind(v => v.ToEitherAsync());
+
+        private async Task<List<MediaItemViewModel>> PersistItems(
+            ReplaceSimpleMediaCollectionItems request,
+            List<MediaItem> mediaItems)
+        {
+            await _mediaCollectionRepository.ReplaceItems(request.MediaCollectionId, mediaItems);
+            return mediaItems.Map(MediaItems.Mapper.ProjectToViewModel).ToList();
+        }
+
+        private Task<Validation<BaseError, List<MediaItem>>> Validate(ReplaceSimpleMediaCollectionItems request) =>
+            MediaCollectionMustExist(request).BindT(_ => MediaItemsMustExist(request));
+
+        private async Task<Validation<BaseError, SimpleMediaCollection>> MediaCollectionMustExist(
+            ReplaceSimpleMediaCollectionItems request) =>
+            (await _mediaCollectionRepository.GetSimpleMediaCollection(request.MediaCollectionId))
+            .ToValidation<BaseError>("[MediaCollectionId] does not exist.");
+
+        private async Task<Validation<BaseError, List<MediaItem>>> MediaItemsMustExist(
+            ReplaceSimpleMediaCollectionItems replaceItems)
+        {
+            var allMediaItems = (await replaceItems.MediaItemIds.Map(i => _mediaItemRepository.Get(i)).Sequence())
+                .ToList();
+            if (allMediaItems.Any(x => x.IsNone))
+            {
+                return BaseError.New("[MediaItemId] does not exist");
+            }
+
+            return allMediaItems.Sequence().ValueUnsafe().ToList();
+        }
+    }
+}