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.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using ErsatzTV.Core;
+using ErsatzTV.Core.Domain;
+using ErsatzTV.Core.Interfaces.Metadata;
+using ErsatzTV.Core.Interfaces.Repositories;
+using LanguageExt;
+using static LanguageExt.Prelude;
+
+namespace ErsatzTV.Application.MediaItems.Commands
+{
+    public class
+        RefreshMediaItemMetadataHandler : MediatR.IRequestHandler<RefreshMediaItemMetadata, Either<BaseError, Unit>>
+    {
+        private readonly ILocalMetadataProvider _localMetadataProvider;
+        private readonly IMediaItemRepository _mediaItemRepository;
+
+        public RefreshMediaItemMetadataHandler(
+            IMediaItemRepository mediaItemRepository,
+            ILocalMetadataProvider localMetadataProvider)
+        {
+            _mediaItemRepository = mediaItemRepository;
+            _localMetadataProvider = localMetadataProvider;
+        }
+
+        public Task<Either<BaseError, Unit>> Handle(
+            RefreshMediaItemMetadata request,
+            CancellationToken cancellationToken) =>
+            Validate(request)
+                .MapT(RefreshMetadata)
+                .Bind(v => v.ToEitherAsync());
+
+        private Task<Validation<BaseError, MediaItem>> Validate(RefreshMediaItemMetadata request) =>
+            MediaItemMustExist(request).BindT(PathMustExist);
+
+        private Task<Validation<BaseError, MediaItem>> MediaItemMustExist(
+            RefreshMediaItemMetadata refreshMediaItemMetadata) =>
+            _mediaItemRepository.Get(refreshMediaItemMetadata.MediaItemId)
+                .Map(
+                    maybeItem => maybeItem.ToValidation<BaseError>(
+                        $"[MediaItem] {refreshMediaItemMetadata.MediaItemId} does not exist."));
+
+        private Validation<BaseError, MediaItem> PathMustExist(MediaItem mediaItem) =>
+            Some(mediaItem)
+                .Filter(item => File.Exists(item.Path))
+                .ToValidation<BaseError>($"[Path] '{mediaItem.Path}' does not exist on the file system");
+
+        private Task<Unit> RefreshMetadata(MediaItem mediaItem) =>
+            _localMetadataProvider.RefreshMetadata(mediaItem).ToUnit();
+    }
+}