private bool TryToPriceBasket(Basket basket, BasketPricingResults results)
{
var pricesToAsk = basket.Items.Select(x => x.Name).Distinct(StringComparer.OrdinalIgnoreCase);
var prices = this.priceRepository.GetItemPrices(pricesToAsk);
var pricesByName = prices.ToDictionary(x => x.Name, StringComparer.OrdinalIgnoreCase);
results.ItemPrices = new List <BasketItemPrice>();
var isFailed = false;
var itemCount = 0;
foreach (var item in basket.Items.GroupBy(x => x.Name))
{
var itemName = item.Key;
var quantity = item.Count();
var itemPrice = pricesByName.TryGetValue(itemName, out var price) ? price.Price : default(decimal?);
var baskItemPrice =
new BasketItemPrice
{
Name = item.Key,
UnitPrice = itemPrice,
Quantity = quantity
};
itemCount += quantity;
results.ItemPrices.Add(baskItemPrice);
if (!baskItemPrice.UnitPrice.HasValue)
{
results.Messages.Add(string.Format(Errors.PriceUnavailable, baskItemPrice.Name));
isFailed = true;
}
}
results.ItemCount = itemCount;
return(isFailed);
}
private decimal CalculatePrice(BasketItemPrice basketItemPrice)
{
var price = basketItemPrice.UnitPrice.Value * basketItemPrice.Quantity;
return(price);
}