public static int placeOffer(string username, string storeName, string productName, string category, string manufacturer, int amount, double price)
{
aUser requester = getUser(username);
Store store = Stores.searchStore(storeName);
ProductInfo pInfo = ProductInfo.getProductInfo(productName, category, manufacturer);
if (requester == null | store == null | pInfo == null | price < 0)
{
return(-1);
}
Product product = new Product(pInfo, amount, price);
OfferRequest request = new OfferRequest(product, requester, store);
requester.placeOffer(request);
return(request.id);
}