public string Manage(string guid, bool approve)
{
if (Session["user"] == null || !(bool)Session["isAdmin"])
{
return(string.Empty);
}
if (string.IsNullOrWhiteSpace(guid) || !Guid.TryParse(guid, out var id))
{
return("#Error: Invalid auction id.");
}
using (var db = new AuctionHouseDB())
{
using (var transaction = db.Database.BeginTransaction(IsolationLevel.Serializable))
{
try
{
var auction = db.FindAuctionById(id);
if (auction == null)
{
throw new TransactionException("Could not find auction with such id.");
}
if (auction.OpenedOn != null)
{
throw new TransactionException("Auction was already managed.");
}
auction.OpenedOn = DateTime.Now;
if (!approve)
{
auction.CompletedOn = auction.OpenedOn;
}
db.Entry(auction).State = EntityState.Modified;
db.SaveChanges();
transaction.Commit();
try { AuctionHub.HubContext.Clients.All.onAuctionManaged(auction.ID.ToString(), auction.Title, approve ? auction.AuctionTime : 0, auction.StartingPrice, string.Empty, "[No bidder]", "<b>" + auction.OpenedOn.Value.ToString(Settings.DateTimeFormat) + "</b>", auction.CompletedOn != null ? "<b>" + auction.CompletedOn.Value.ToString(Settings.DateTimeFormat) + "</b>" : "<b style=\"color: red;\">Not complete</b>"); }
catch (Exception ex) { log.Error(ex); }
return("Auction successfully managed.");
}
catch (TransactionException ex)
{
transaction.Rollback();
return("#Error: " + ex.Message);
}
catch (Exception ex)
{
transaction.Rollback();
log.Error(ex.Message, ex);
return("#Error: Unknown error occured.");
}
}
}
}
public string Claim(string guid)
{
var user = Session["user"] as User;
if (user == null)
{
return(string.Empty);
}
using (var db = new AuctionHouseDB())
{
using (var transaction = db.Database.BeginTransaction(IsolationLevel.Serializable))
{
try
{
Auction auction = null;
if (Guid.TryParse(guid, out var id))
{
auction = db.FindAuctionById(id);
}
if (auction == null)
{
throw new TransactionException("Invalid auction.");
}
if (auction.Holder != user.ID)
{
throw new TransactionException("Can't claim auction prize.");
}
if (auction.OpenedOn == null)
{
throw new TransactionException("Auction is not opened.");
}
var now = DateTime.Now;
if (now < auction.OpenedOn.Value.AddSeconds(auction.AuctionTime))
{
throw new TransactionException("Auction is not finished yet.");
}
if (auction.CompletedOn != null)
{
throw new TransactionException("Auction is completed, no prize left to claim.");
}
auction.CompletedOn = now;
db.Entry(auction).State = EntityState.Modified;
var lastBid = auction.LastBid;
if (lastBid != null)
{
user = db.FindUserById(user.ID);
user.Balance += lastBid.Amount;
db.Entry(user).State = EntityState.Modified;
}
db.SaveChanges();
transaction.Commit();
return("Successfully claimed auction prize. Please, check your balance.");
}
catch (TransactionException ex)
{
transaction.Rollback();
return("#Error: " + ex.Message);
}
catch (Exception ex)
{
transaction.Rollback();
log.Error(ex.Message, ex);
return("#Error: Unknown error occured.");
}
}
}
}
public string Bid(string guid, decimal amount)
{
var user = Session["user"] as User;
if (user == null)
{
return("#Error: Please, log in!");
}
if (!Guid.TryParse(guid, out var id))
{
return("#Error: Invalid guid.");
}
using (var db = new AuctionHouseDB())
{
using (var transaction = db.Database.BeginTransaction(IsolationLevel.Serializable))
{
try
{
var auction = db.FindAuctionById(id);
if (auction == null)
{
throw new TransactionException("Auction does not exist (to bid on such).");
}
if (auction.OpenedOn == null)
{
throw new TransactionException("Auction is not opened yet.");
}
if (auction.CompletedOn != null || DateTime.Now >= auction.OpenedOn.Value.AddSeconds(auction.AuctionTime))
{
throw new TransactionException("Auctions is closed.");
}
if (auction.Holder == user.ID)
{
throw new TransactionException("Cannot bid on owning auction.");
}
var lastBid = auction.LastBid;
if (lastBid != null)
{
if (amount <= lastBid.Amount)
{
throw new TransactionException("Cannot bid with lower price than current.");
}
}
else
{
if (amount <= auction.StartingPrice)
{
throw new TransactionException("Cannot bid with lower price than current.");
}
}
user = db.FindUserById(user.ID);
if (user.Balance < amount)
{
throw new TransactionException("Insufficient funds.");
}
if (lastBid != null)
{
lastBid.User.Balance += lastBid.Amount;
db.Entry(lastBid.User).State = EntityState.Modified;
}
user.Balance -= amount;
db.Entry(user).State = EntityState.Modified;
var bid = new Bid
{
ID = Guid.NewGuid(),
Bidder = user.ID,
Auction = auction.ID,
BidOn = DateTime.Now,
Amount = amount
};
db.Bids.Add(bid);
db.SaveChanges();
transaction.Commit();
try { AuctionHub.HubContext.Clients.All.onBid(auction.ID.ToString(), user.ID.ToString(), user.FirstName + " " + user.LastName, bid.BidOn.ToString(Settings.DateTimeFormat), amount); }
catch (Exception ex) { log.Error(ex); }
return("Bidding successful.");
}
catch (TransactionException ex)
{
transaction.Rollback();
return("#Error: " + ex.Message);
}
catch (Exception ex)
{
transaction.Rollback();
log.Error(ex.Message, ex);
return("#Error: Unknown error occured.");
}
}
}
}
public ActionResult Show(string id)
{
using (var db = new AuctionHouseDB())
{
try
{
if (!Guid.TryParse(id, out var guid))
{
return(HttpNotFound());
}
var auction = db.FindAuctionById(guid, true);
if (auction == null)
{
return(HttpNotFound());
}
if (auction.OpenedOn == null &&
(Session["user"] == null || !(bool)Session["isAdmin"] && ((User)Session["user"]).ID != auction.Holder))
{
return(HttpNotFound());
}
if (auction.OpenedOn != null && auction.CompletedOn == null)
{
var completedOn = auction.OpenedOn.Value.AddSeconds(auction.AuctionTime);
if (DateTime.Now >= completedOn)
{
auction.CompletedOn = completedOn;
}
}
var images = new List <string>(16);
var path = "/assets/storage/auctions/" + auction.ID.ToString() + "/";
foreach (var file in Directory.EnumerateFiles(Server.MapPath("~" + path)))
{
if (file.EndsWith(".png"))
{
images.Add(path + Path.GetFileName(file));
}
}
ViewBag.ImageSources = images;
var lastBid = auction.LastBid;
if (lastBid != null)
{
ViewBag.Bidder = lastBid.User;
ViewBag.CurrentPrice = lastBid.Amount;
}
else
{
ViewBag.CurrentPrice = auction.StartingPrice;
}
return(View(auction));
}
catch (Exception ex)
{
log.Error(ex.Message, ex);
return(View("Error"));
}
}
}
