public void Execute(BuyBeersRequest request, IBuyBeersPresenter presenter)
{
var ids = request.Beers.Keys;
var catalogBeersStock = _catalog
.GetAllBeers()
.Where(x => ids.Contains(x.Id.Value))
.Select(x => new { BeerId = x.Id.Value, BeerStock = x.Stock.Value });
var response = new BuyBeersResponse
{
Data = new Dictionary <Guid, bool>(),
Errors = new Dictionary <Guid, string>()
};
request.Beers.ToList().ForEach(x =>
{
var(key, value) = x;
var founded = catalogBeersStock.Any(cbs => cbs.BeerId.Equals(key));
var available = founded && catalogBeersStock.Any(cbs => cbs.BeerStock >= value);
if (!founded)
{
response.Errors.Add(key, "Unknown Beer.");
response.Data.Add(key, false);
}
else if (!available)
{
response.Errors.Add(key, "Not enough stock.");
response.Data.Add(key, false);
}
else
{
response.Data.Add(key, true);
}
});
if (response.Errors.Any())
{
response.Data = null;
}
else
{
request.Beers.ToList().ForEach(x =>
{
var(key, value) = x;
var beer = _catalog.GetOneBeer(key);
beer.DecreaseStock(value);
_catalog.UpdateBeer(beer);
});
}
presenter.Present(response);
}
public ActionResult <ApiBuyBeersViewModel> BuyBeers([FromBody] BuyBeersRequest request)
{
var useCase = new BuyBeersUseCase(_catalog);
var presenter = new ApiBuyBeersPresenter();
useCase.Execute(request, presenter);
var vm = presenter.ViewModel;
return(vm.HttpCode == 200 ? Ok(vm) : (ActionResult)BadRequest(vm));
}