public async Task <Either <BaseError, LocalLibraryViewModel> > Handle(
CreateLocalLibrary request,
CancellationToken cancellationToken)
{
await using TvContext dbContext = await _dbContextFactory.CreateDbContextAsync(cancellationToken);
Validation <BaseError, LocalLibrary> validation = await Validate(dbContext, request);
return(await LanguageExtensions.Apply(validation, localLibrary => PersistLocalLibrary(dbContext, localLibrary)));
}
private static Task <Validation <BaseError, LocalLibrary> > MediaSourceMustExist(
TvContext dbContext,
CreateLocalLibrary request) =>
dbContext.LocalMediaSources
.OrderBy(lms => lms.Id)
.FirstOrDefaultAsync()
.Map(Optional)
.MapT(
lms => new LocalLibrary
{
Name = request.Name,
Paths = request.Paths.Map(p => new LibraryPath {
Path = p
}).ToList(),
MediaKind = request.MediaKind,
MediaSourceId = lms.Id
})
.Map(o => o.ToValidation <BaseError>("LocalMediaSource does not exist."));
private static Task <Validation <BaseError, LocalLibrary> > Validate(
TvContext dbContext,
CreateLocalLibrary request) =>
MediaSourceMustExist(dbContext, request)
.BindT(localLibrary => NameMustBeValid(request, localLibrary))
.BindT(localLibrary => PathsMustBeValid(dbContext, localLibrary));