public IList <Bid> GetAllBidsByProductName(string productName)
{
CoreValidator.ThrowIfNullOrEmpty(productName, nameof(productName));
using (this.dbContext)
{
var isExisting = new ProductControllerMock(this.dbContext).IsProductExisting(productName);
if (!isExisting)
{
throw new ArgumentException("The product doesn't exist in the system.");
}
var resultBids = this.dbContext.Bids
.Include("Product")
.Include("User")
.Where(b => b.Product.Name == productName)
.OrderByDescending(b => b.DateOfCreated)
.ThenByDescending(b => b.Coins)
.ToList();
CoreValidator.ThrowIfNull(resultBids, nameof(resultBids));
return(resultBids);
}
}
public IList <Bid> GetAllBidsByProductId(int productId)
{
CoreValidator.ThrowIfNegativeOrZero(productId, nameof(productId));
var isProductExists = new ProductControllerMock(dbContext).IsProductExistingById(productId);
if (!isProductExists)
{
throw new ArgumentException("Product does not exist in the system.");
}
using (dbContext)
{
return(dbContext.Bids.Where(b => b.ProductId == productId).ToList());
}
}
public bool BidExpired(int productId)
{
CoreValidator.ThrowIfNegativeOrZero(productId, nameof(productId));
using (var db = new AuctionContext())
{
using (var transaction = db.Database.BeginTransaction())
{
try
{
var product = new ProductControllerMock(dbContext).GetProductById(productId);
db.Products.Attach(product);
if (!(DateTime.Now >= product.EndDate))
{
throw new ArgumentException($"The product date for finish is not yet reached: {product.EndDate}");
}
var bids = db.Bids.Where(b => b.ProductId == productId);
if (bids.Count() == 0)
{
product.IsAvailable = false;
db.Entry(product).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
transaction.Commit();
}
else
{
var bid = bids.OrderByDescending(b => b.Id).FirstOrDefault();
db.Bids.Attach(bid);
bid.IsWon = true;
db.Entry(bid).State = System.Data.Entity.EntityState.Modified;
product.IsAvailable = false;
db.Entry(product).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
transaction.Commit();
}
return(true);
}
catch (Exception)
{
transaction.Rollback();
throw;
}
}
}
}
public void MakeBid(int userId, int productId, int coins)
{
CoreValidator.ThrowIfNegativeOrZero(userId, nameof(userId));
CoreValidator.ThrowIfNegativeOrZero(productId, nameof(productId));
CoreValidator.ThrowIfNegativeOrZero(coins, nameof(coins));
using (dbContext)
{
#region CHECK FOR EXISTING USER, PRODUCT AND FOR VALID COINS
var userController = new UserControllerMock(dbContext);
var productController = new ProductControllerMock(dbContext);
var isUserExisting = userController.IsUserExistingById(userId);
var isProductExisting = productController.IsProductExistingById(productId);
if (!isUserExisting || !isProductExisting)
{
throw new ArgumentException("The product or the user is not existing in the system.");
}
var currentUser = userController.GetUserById(userId);
dbContext.Users.Attach(currentUser);
if (coins > currentUser.Coins)
{
throw new ArgumentException($"Your coins are {currentUser.Coins}, you've tried to spent {coins}.");
}
#endregion
#region LOGIC FOR OVERBIDDING
var isThereAnyBid = dbContext.Bids.Any(b => b.ProductId == productId && b.IsWon == false);
if (isThereAnyBid)
{
var lastBidEntry = dbContext.Bids
.Where(b => b.ProductId == productId)
.OrderByDescending(b => b.DateOfCreated)
.Take(1)
.FirstOrDefault();
if (coins <= lastBidEntry.Coins)
{
throw new ArgumentException($"You cannot overbid with less than or equal to the last bidders coins: {lastBidEntry.Coins}");
}
if (lastBidEntry.UserId == currentUser.Id)
{
throw new ArgumentException("You cannot overbid yourself.");
}
var newBid = GetNewBid(userId, productId, coins);
currentUser.Coins -= coins;
var lastBidUserId = lastBidEntry.UserId;
var lastUser = userController.GetUserById(lastBidUserId);
dbContext.Users.Attach(lastUser);
lastUser.Coins += lastBidEntry.Coins;
// dbContext.Entry(lastUser).State = System.Data.Entity.EntityState.Modified;
dbContext.Bids.Add(newBid);
dbContext.SaveChanges();
return;
}
#endregion
#region LOGIC FOR CREATE BID FOR FIRST TIME
var bid = GetNewBid(userId, productId, coins);
currentUser.Coins -= coins;
dbContext.Entry(currentUser).State = System.Data.Entity.EntityState.Modified;
dbContext.Bids.Add(bid);
dbContext.SaveChanges();
#endregion
}
}
