public ActionResult Open(string GUID)
{
if (!Auth.Check() || !Auth.User.IsAdmin())
{
return(RedirectToLogin());
}
// admin wants to open auction
var existingAuction = this.db.Auctions.Find(GUID);
if (null == existingAuction)
{
return(HttpNotFound());
}
string error = "Invalid input";
if (existingAuction.StatusText != "READY")
{
error = "You can only open ready auctions";
}
else
{
existingAuction.Status = 1;
existingAuction.CurrentPrice = existingAuction.StartingPrice;
existingAuction.DateOpened = DateTime.UtcNow;
existingAuction.DateClosed = DateTime.UtcNow.AddSeconds((double)existingAuction.Duration);
db.Entry(existingAuction).State = EntityState.Modified;
db.SaveChanges();
// TODO: notify all clients
Flash.SuccessMessage("Auction opened successfully");
return(RedirectToAction("Index"));
}
Flash.ErrorMessage(error);
return(RedirectToAction("Index"));
}
private ActionResult RedirectToLogin(string msg = "You must be logged in to access this page")
{
Flash.ErrorMessage(msg);
return(RedirectToAction("Login", "Users"));
}
public ActionResult Bid(string GUID, decimal tokensOffered, string OnDetailsPage = null)
{
if (!Auth.Check())
{
return(RedirectToLogin());
}
string error = "Failed to place bid";
// first refresh Auth user
//Auth.RefreshUser();
// modify tokens offered based on currency
tokensOffered = (tokensOffered / (decimal)Utils.TokenValue);
using (var transaction = db.Database.BeginTransaction(IsolationLevel.Serializable))
{
try
{
var existingAuction = this.db.Auctions.Find(GUID);
if (existingAuction != null && existingAuction.IsOpened() && existingAuction.CurrentPrice.Value < tokensOffered)
{
decimal numRemainingTokens = Auth.User.NumTokens.Value - tokensOffered;
var lastBidder = GetLastBidder(existingAuction);
if (lastBidder != null && Auth.Id == lastBidder.Id)
{
numRemainingTokens += existingAuction.CurrentPrice.Value;
}
if (numRemainingTokens >= 0)
{
// insert new bid
Bid bid = new Bid();
bid.AuctionID = existingAuction.GUID;
bid.UserID = Auth.Id;
bid.UserName = Auth.User.DisplayName;
bid.DateOfBidding = DateTime.UtcNow;
bid.TokensOffered = tokensOffered;
db.Bids.Add(bid);
// update num tokens for last bidder
if (lastBidder != null)
{
lastBidder.NumTokens += existingAuction.CurrentPrice;
db.Entry(lastBidder).State = EntityState.Modified;
}
// we must modify the same instance
var user = Auth.User;
if (lastBidder != null && lastBidder.Id == user.Id)
{
user = lastBidder;
}
// update amount of tokens for new bidder
user.NumTokens = numRemainingTokens;
db.Entry(user).State = EntityState.Modified;
// update current price of auction
existingAuction.CurrentPrice = tokensOffered;
db.Entry(existingAuction).State = EntityState.Modified;
db.SaveChanges();
transaction.Commit();
// update all clients
Hubs.AuctionHub.UpdateClientAuctions(existingAuction.GUID, tokensOffered, user.DisplayName, user.NumTokens.Value, lastBidder != null ? lastBidder.DisplayName : "",
lastBidder != null ? lastBidder.NumTokens.Value : 0);
Flash.SuccessMessage("Bid placed successfully");
return(RedirectAfterBid(OnDetailsPage, GUID));
}
else
{
error = "You don't have enough tokens";
}
}
Flash.ErrorMessage(error);
return(RedirectAfterBid(OnDetailsPage, GUID));
}
catch (Exception)
{
transaction.Rollback();
Flash.ErrorMessage("Transaction error");
return(RedirectAfterBid(OnDetailsPage, GUID));
}
}
}