public async Task <decimal> RealTimePrice(int productId, decimal euroSpend)
{
//List from the ask table sorted ascending
var offersToBuy = db.Ask.Where(x => x.ProductId == productId).OrderBy(x => x.PriceAsk).ToList();
decimal quantityToBeOrdered = 0; //the quantity that users can buy with his euroSpend
foreach (var item in offersToBuy)
{
if ((item.PriceAsk * item.Quantity) % euroSpend == item.PriceAsk * item.Quantity)
{
euroSpend -= item.PriceAsk * item.Quantity;
db.Ask.Remove(item);
//increase wallet that belongs to user who had placed the ask
await _walletRepository.IncreaseWallet(item.PriceAsk *item.Quantity, item.UserAskId);
quantityToBeOrdered += item.Quantity; //increase the quantity of user's order
TradeHistory trade = new TradeHistory //initiate a new trade
{
Quantity = item.Quantity,
Price = item.PriceAsk,
Status = "Buy",
DateofTransaction = DateTime.Now,
ProductId = item.ProductId
};
await UpdateTradeHistory(trade);
}
else if (item.PriceAsk * item.Quantity == euroSpend)
{
euroSpend -= item.PriceAsk * item.Quantity;
db.Ask.Remove(item);
//increase wallet that belongs to user who had placed the ask
await _walletRepository.IncreaseWallet(item.PriceAsk *item.Quantity, item.UserAskId);
quantityToBeOrdered += item.Quantity; //increase the quantity of user's order
decimal closedPrice = item.PriceAsk; //the new current product price
//Find current product price
await SetCurrentPrice(productId, closedPrice);
TradeHistory trade = new TradeHistory //initiate a new trade
{
Quantity = item.Quantity,
Price = item.PriceAsk,
Status = "Buy",
DateofTransaction = DateTime.Now,
ProductId = item.ProductId
};
await UpdateTradeHistory(trade);
break;
}
else
{
//reduce the quanity of ask
var itemForReduce = item;
itemForReduce.Quantity -= euroSpend / item.PriceAsk;
db.Ask.Update(itemForReduce);
await db.SaveChangesAsync();
//increase wallet that belongs to user who had placed the ask
await _walletRepository.IncreaseWallet(euroSpend, item.UserAskId);
quantityToBeOrdered += euroSpend / item.PriceAsk; //increase the quantity of user's order
decimal closedPrice = item.PriceAsk; //the new current product price
await SetCurrentPrice(productId, closedPrice);
TradeHistory trade = new TradeHistory //initiate a new trade
{
Quantity = euroSpend / item.PriceAsk,
Price = item.PriceAsk,
Status = "Buy",
DateofTransaction = DateTime.Now,
ProductId = item.ProductId
};
await UpdateTradeHistory(trade);
break;
}
}
return(quantityToBeOrdered);
}
public async Task <decimal> RealTimePrice(int productId, decimal coinSell)
{
//List from the Offer table sorted Descending
var offersToBuy = db.Offer.Where(x => x.ProductId == productId).OrderByDescending(x => x.PriceOffer).ToList();
decimal moneyEarn = 0; //money earned from selling the coinsell amount
foreach (var item in offersToBuy)
{
if (item.Quantity > coinSell)
{
//if offer in offer table is bigger than the amount we enter
moneyEarn += coinSell * item.PriceOffer;
//reduce the quantity of the bid in offer table
item.Quantity -= coinSell;
db.Offer.Update(item);
//decrease the wallet of user who had placed the bod
//await _walletRepository.DecreaseWallet(coinSell * item.PriceOffer, item.UserOfferId);
await _walletRepository.DecreaseWallet(coinSell *item.PriceOffer, item.UserOfferId);
await db.SaveChangesAsync();
decimal closedPrice = item.PriceOffer; //the new current product price
//Find current product price
await SetCurrentPrice(productId, closedPrice);
TradeHistory trade = new TradeHistory //initiate a new trade
{
Quantity = coinSell,
Price = item.PriceOffer,
Status = "Sell",
DateofTransaction = DateTime.Now,
ProductId = item.ProductId
};
await UpdateTradeHistory(trade);
break;
}
else if (item.Quantity == coinSell)
{
db.Offer.Remove(item);
moneyEarn += coinSell * item.PriceOffer; //
decimal closedPrice = item.PriceOffer; //the new current product price
//Find current product price
await SetCurrentPrice(productId, closedPrice);
await _walletRepository.DecreaseWallet(coinSell *item.PriceOffer, item.UserOfferId);
TradeHistory trade = new TradeHistory //initiate a new trade
{
Quantity = item.Quantity,
Price = item.PriceOffer,
Status = "Sell",
DateofTransaction = DateTime.Now,
ProductId = item.ProductId
};
await UpdateTradeHistory(trade);
break;
}
else
{
db.Offer.Remove(item);
await db.SaveChangesAsync();
coinSell -= item.Quantity;
moneyEarn += item.Quantity * item.PriceOffer; //increase the quantity of user's order
await _walletRepository.DecreaseWallet(item.Quantity *item.PriceOffer, item.UserOfferId);
TradeHistory trade = new TradeHistory //initiate a new trade
{
Quantity = item.Quantity,
Price = item.PriceOffer,
Status = "Sell",
DateofTransaction = DateTime.Now,
ProductId = item.ProductId
};
await UpdateTradeHistory(trade);
}
}
return(moneyEarn);
}
