public ActionResult <StatisticsViewModel> DeleteBuy(int id)
{
var statisticsDto = new StatisticsDTO();
var currentUserName = User.FindFirst(ClaimTypes.Name).Value;
var currentUserDto = _userService.GetUserByName(currentUserName, statisticsDto);
var buyOfferToDelete = _buyOfferService.GetById(id, statisticsDto);
if (buyOfferToDelete != null)
{
if (buyOfferToDelete.BuyerId == currentUserDto.Id)
{
if (_buyOfferService.Delete(buyOfferToDelete.Id, statisticsDto))
{
currentUserDto.Value += buyOfferToDelete.Price * buyOfferToDelete.Amount;
currentUserDto.Password = null;
if (_userService.EditUser(currentUserDto.Id, currentUserDto, statisticsDto))
{
return(Mapper.Map <StatisticsViewModel>(statisticsDto));
}
}
}
}
return(NotFound(Mapper.Map <StatisticsViewModel>(statisticsDto)));
}
public void FindBuyOffers(SellOfferDTO sellOffer, UserDTO currentUser, StatisticsDTO statistics)
{
//get all buy offers for stock specified in offer
var share = _shareService.GetShareById(sellOffer.ShareId, statistics);
if (share.Amount < sellOffer.Amount)
{
return;
}
var offers = _buyOfferService.GetAll(statistics)
.Where(o => o.StockId == share.StockId) //check if stock matched
.Where(o => o.Price >= sellOffer.Price) //price greater or equeal one in created offer
.Where(o => o.BuyerId != currentUser.Id) //remove current user offers
.OrderByDescending(o => o.Price); //order by most expensive - shares goes to a highest bidder
foreach (var offer in offers)
{
int tradedAmount = 0;
//after this case offer is empty and we don't add it to database
if (sellOffer.Amount < offer.Amount)
{
//sold some amount of shares to some user and subtract amount from this users offer
offer.Amount -= sellOffer.Amount;
_buyOfferService.Edit(offer, statistics);
//subtract those sold shares from current user share entry
share.Amount -= sellOffer.Amount;
_shareService.EditShare(share.Id, share, statistics);
//add sold shares to buyer share or create if doesn't have one
var buyerShare = _shareService.GetAllShares(statistics).Where(c => c.OwnerId == offer.BuyerId).FirstOrDefault();
if (buyerShare != null)
{
buyerShare.Amount += sellOffer.Amount;
_shareService.EditShare(buyerShare.Id, buyerShare, statistics);
}
else
{
buyerShare = new ShareDTO
{
OwnerId = currentUser.Id,
Amount = sellOffer.Amount,
StockId = offer.StockId,
};
_shareService.AddShare(buyerShare, statistics);
}
//give money to current user(share holder)
currentUser.Value += sellOffer.Amount * sellOffer.Price;
currentUser.Password = null;
_userService.EditUser(currentUser.Id, currentUser, statistics);
tradedAmount = sellOffer.Amount;
sellOffer.Amount = 0;
}
//this case implies that amount in created offer is greater than selected offer
else
{
sellOffer.Amount -= offer.Amount;
share.Amount -= offer.Amount;
_shareService.EditShare(share.Id, share, statistics);
currentUser.Value += offer.Amount * offer.Price;
currentUser.Password = null;
_userService.EditUser(currentUser.Id, currentUser, statistics);
_buyOfferService.Delete(offer.Id, statistics);
}
//adding transaction for each iteration of trading
TransactionDTO transaction = new TransactionDTO
{
Amount = tradedAmount,
Price = offer.Price,
BuyerId = offer.BuyerId,
SellerId = currentUser.Id,
StockId = offer.StockId,
Date = DateTime.Now
};
_transactionService.Add(transaction, statistics);
}
if (sellOffer.Amount > 0)
{
sellOffer.SellerId = currentUser.Id;
_sellOfferService.Add(sellOffer, statistics);
//freeze currentuser shares equivalent to amount left in offer
share.Amount -= sellOffer.Amount;
_shareService.EditShare(share.Id, share, statistics);
}
CalculatePriceChange(share.StockId, statistics);
}
