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 void Present(BuyBeersResponse response)
{
ViewModel = new ApiBuyBeersViewModel
{
HttpCode = response.Data.Values.Any(x => !x) ? 400 : 200,
Success = response.Data.Values.All(x => x),
Data = response.Data,
Errors = response.Errors
};
}
