private void SetWinner()
{
Raffle.Models.Raffle selectedRaffle = this.item.Raffles.OrderBy(r => Guid.NewGuid()).First();
IEnumerable <Raffle.Models.Raffle> otherRaffles = this.item.Raffles.Where(r => r.RaffleNumber != selectedRaffle.RaffleNumber);
selectedRaffle.IsPrized = true;
foreach (var raffle in otherRaffles)
{
raffle.IsPrized = false;
}
this.item.ClosedAt = DateTime.Now;
}
public Raffle.Models.Raffle BuyRaffle(UserProfile buyer)
{
lock (this.item)
{
ValidateTransaction(buyer);
Raffle.Models.Raffle raffle = ExecuteTransaction(buyer);
if (!this.item.CanBuy)
{
SetWinner();
}
return(raffle);
}
}
public async Task <ActionResult> Purchase(int id)
{
UserProfile user = Context.UserProfiles.First(u => u.UserName == User.Identity.Name);
if (user.UnusedRaffles == 0)
{
return(RedirectToAction("Index", new { id }));
}
Item item = await Context.Items.FindAsync(id);
lock (item)
{
int mostRecentRaffleNumber = item.Raffles.OrderByDescending(r => r.RaffleNumber)
.Select(r => r.RaffleNumber)
.FirstOrDefault();
item.Raffles.Add(new Raffle.Models.Raffle
{
UserProfileId = user.UserId,
PurchasedAt = DateTime.Now,
RaffleNumber = mostRecentRaffleNumber + 1
});
user.UnusedRaffles--;
Context.SaveChanges();
if (item.Raffles.Count == item.Price + (int)(item.Price * 0.40))
{
Raffle.Models.Raffle selectedRaffle = item.Raffles.OrderBy(r => Guid.NewGuid()).First();
IEnumerable <Raffle.Models.Raffle> otherRaffles = item.Raffles.Where(r => r.RaffleNumber != selectedRaffle.RaffleNumber);
selectedRaffle.IsPrized = true;
foreach (var raffle in otherRaffles)
{
raffle.IsPrized = false;
}
item.ClosedAt = DateTime.Now;
}
}
return(RedirectToAction("Index", new { id }));
}
private Raffle.Models.Raffle ExecuteTransaction(UserProfile buyer)
{
int mostRecentRaffleNumber = this.item.Raffles.OrderByDescending(r => r.RaffleNumber)
.Select(r => r.RaffleNumber)
.FirstOrDefault();
var raffle = new Raffle.Models.Raffle
{
ItemId = this.item.Id,
UserProfileId = buyer.UserId,
RaffleNumber = mostRecentRaffleNumber + 1,
PurchasedAt = DateTime.Now
};
this.item.Raffles.Add(raffle);
return raffle;
}
private Raffle.Models.Raffle ExecuteTransaction(UserProfile buyer)
{
int mostRecentRaffleNumber = this.item.Raffles.OrderByDescending(r => r.RaffleNumber)
.Select(r => r.RaffleNumber)
.FirstOrDefault();
var raffle = new Raffle.Models.Raffle
{
ItemId = this.item.Id,
UserProfileId = buyer.UserId,
RaffleNumber = mostRecentRaffleNumber + 1,
PurchasedAt = DateTime.Now
};
this.item.Raffles.Add(raffle);
return(raffle);
}
