public double CurrentPrice()
{
using (var ctx = new AuctionContext(ConnectionString))
{
var auction = ctx.Auctions
.SingleOrDefault(s => s.AuctionId.Equals(Id) && s.SiteName.Equals(SiteName))
?? throw new InvalidOperationException(nameof(Id) + "doesn't exist any more");
return(auction.CurrentPrice);
}
}
public void Delete()
{
using (var ctx = new AuctionContext(ConnectionString))
{
var auction = ctx.Auctions
.SingleOrDefault(s => s.AuctionId.Equals(Id) && s.SiteName.Equals(SiteName))
?? throw new InvalidOperationException(nameof(Id) + "doesn't exist any more");
ctx.Auctions.Remove(auction);
ctx.SaveChanges();
}
}
public IUser CurrentWinner()
{
using (var ctx = new AuctionContext(ConnectionString))
{
var auction = ctx.Auctions
.SingleOrDefault(s => s.AuctionId.Equals(Id) && s.SiteName.Equals(SiteName))
?? throw new InvalidOperationException(nameof(Id) + "doesn't exist any more");
if (!auction.FirstBid && auction.CurrentWinner != null)
{
return new User(auction.CurrentWinner, auction.SiteName)
{
ConnectionString = ConnectionString, AlarmClock = AlarmClock
}
}
;
return(null);
}
}
public bool BidOnAuction(ISession session, double offer)
{
if (EndsOn > AlarmClock.Now)
{
if (offer >= 0)
{
IfNullThrow(session);
using (var ctx = new AuctionContext(ConnectionString))
{
var siteNameLoggedU = ctx.Sessions
.Where(s => s.SessionId.Equals(session.Id))
.Select(s => s.User.SiteName)
.SingleOrDefault();
var siteNameSellerU = ctx.Users
.Where(s => s.Username.Equals(Seller.Username))
.Select(s => s.SiteName)
.SingleOrDefault();
if (session.IsValid() && !Equals(Seller, session.User) &&
siteNameLoggedU == siteNameSellerU)
{
var auction = ctx.Auctions
.SingleOrDefault(s => s.AuctionId.Equals(Id))
?? throw new InvalidOperationException(nameof(Id) + "doesn't exist any more");
var sessionObj = session as Session;
sessionObj?.RenewedSession(session);
if (Equals(session.User, CurrentWinner()) &&
offer < auction.HighestBid + auction.Site.MinimumBidIncrement ||
!Equals(session.User, CurrentWinner()) && offer < CurrentPrice() ||
!Equals(session.User, CurrentWinner()) &&
offer < CurrentPrice() + auction.Site.MinimumBidIncrement &&
auction.FirstBid == false)
{
return(false);
}
if (auction.FirstBid)
{
auction.HighestBid = offer;
auction.CurrentWinner = session.User.Username;
auction.FirstBid = false;
}
else if (CurrentWinner().Equals(session.User))
{
auction.HighestBid = offer;
}
else
{
switch (auction.FirstBid)
{
case false when !Equals(CurrentWinner(), session.User) &&
offer > auction.HighestBid:
auction.CurrentPrice = Math.Min(offer,
auction.HighestBid + auction.Site.MinimumBidIncrement);
auction.HighestBid = offer;
auction.CurrentWinner = session.User.Username;
break;
case false when !Equals(CurrentWinner(), session.User) &&
offer <= auction.HighestBid:
auction.CurrentPrice = Math.Min(offer + auction.Site.MinimumBidIncrement,
auction.HighestBid);
break;
}
}
ctx.SaveChanges();
return(true);
}
throw new ArgumentException();
}
}
throw new ArgumentOutOfRangeException();
}
throw new InvalidOperationException();
}
