53 lines
2.1 KiB
C#
53 lines
2.1 KiB
C#
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();
|
|
}
|
|
}
|