public async Task <Either <BaseError, Unit> > Handle(
AddEpisodeToCollection request,
CancellationToken cancellationToken)
{
await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);
Validation <BaseError, Parameters> validation = await Validate(dbContext, request);
return(await LanguageExtensions.Apply(
validation,
parameters => ApplyAddTelevisionEpisodeRequest(dbContext, parameters)));
}
private async Task <Unit> ApplyAddTelevisionEpisodeRequest(AddEpisodeToCollection request)
{
if (await _mediaCollectionRepository.AddMediaItem(request.CollectionId, request.EpisodeId))
{
// rebuild all playouts that use this collection
foreach (int playoutId in await _mediaCollectionRepository
.PlayoutIdsUsingCollection(request.CollectionId))
{
await _channel.WriteAsync(new BuildPlayout(playoutId, true));
}
}
return(Unit.Default);
}
private static async Task <Validation <BaseError, Parameters> > Validate(
TvContext dbContext,
AddEpisodeToCollection request) =>
(await CollectionMustExist(dbContext, request), await ValidateEpisode(dbContext, request))
private async Task <Validation <BaseError, Unit> > Validate(AddEpisodeToCollection request) => (await CollectionMustExist(request), await ValidateEpisode(request))
public Task <Either <BaseError, Unit> > Handle(
AddEpisodeToCollection request,
CancellationToken cancellationToken) =>
Validate(request)
.MapT(_ => ApplyAddTelevisionEpisodeRequest(request))
.Bind(v => v.ToEitherAsync());