public Bid AddBid(Bid bid)
{
var user = databaseAdapter.GetUser(bid.UserId);
if (user == null)
{
throw new NotFoundException("User", bid.UserId.ToString());
}
var(product, existingBid) = databaseAdapter.GetProductBid(bid.ProductId);
if (product == null)
{
throw new NotFoundException("Product", bid.ProductId.ToString());
}
if (product.AuctionEnd <= DateTime.UtcNow)
{
throw new BadRequestException(product, "Auction expired");
}
if (existingBid != null && bid.Price <= existingBid.Price)
{
throw new BadRequestException(bid, $"Unsupported price. Should be greater then ${existingBid.Price}");
}
bid.Id = Guid.NewGuid();
databaseAdapter.AddBid(bid);
return(bid);
}