///// <summary>
///// Modifies the amount of items in user's basket.
///// </summary>
///// <param name="BasketID">Specifies basket</param>
///// <param name="amount">Specifies amount</param>
///// <returns>True if could complete operation, false otherwise.</returns>
//public async Task<bool> ModifyBasket(long BasketID, decimal amount)
//{
// var basketEntity = await context.Baskets.FindAsync(BasketID);
// if (basketEntity == null)
// return false;
// basketEntity.Amount = amount;
// basketEntity.Date = DateTime.Now;
// context.Entry(basketEntity).Property(x => x.Amount).IsModified = true;
// await context.SaveChangesAsync();
// return true;
//}
/// <summary>
/// Saves list of baskets, should be used to save users' buys in case
/// hes logging out.
/// </summary>
/// <param name="basketsList">List of basket objects.</param>
/// <returns>True if could save, false otherwise.</returns>
public async Task <bool> SaveBaskets(List <Basket> basketsList)
{
foreach (Basket basket in basketsList)
{
var basketEntity = new Baskets();
basketEntity.UserID = basket.UserID;
basketEntity.ProductID = basket.ProductID;
basketEntity.Amount = basket.Amount;
basketEntity.Date = basket.Date;
context.Baskets.Add(basketEntity);
}
await context.SaveChangesAsync();
return(true);
}
///// <summary>
///// Saves a basket
///// </summary>
///// <param name="basket">Basket object.</param>
///// <returns>True if could save, false otherwise.</returns>
//public async Task<Basket> AddBasket(Basket basket)
//{
// var basketEntity = new Baskets();
// basketEntity.UserID = basket.UserID;
// basketEntity.ProductID = basket.ProductID;
// basketEntity.Amount = basket.Amount;
// basketEntity.Date = basket.Date;
// context.Baskets.Add(basketEntity);
// await context.SaveChangesAsync();
// basket.BasketID = basketEntity.BasketID;
// return basket;
//}
/// <summary>
/// Moves the specified amount of specified product to the basket of specified user.
/// </summary>
/// <param name="UserID">Specifies user</param>
/// <param name="ProductID">Specifies product</param>
/// <param name="Amount">Specifies amount</param>
/// <returns>True if could complete operation, false otherwise.</returns>
public async Task <bool> MoveProductToBasket(long UserID, long ProductID, decimal Amount)
{
if (Amount <= 0)
{
return(false);
}
var product = await context.Products.FindAsync(ProductID);
if (product == null)
{
return(false);
}
if (Amount > product.Amount)
{
return(false);
}
var basket = await context.Baskets.FirstOrDefaultAsync(x => x.UserID == UserID && x.ProductID == ProductID);
if (basket == null)
{
basket = new Baskets();
basket.Amount = Amount;
basket.Date = DateTime.Now;
basket.ProductID = ProductID;
basket.UserID = UserID;
context.Baskets.Add(basket);
}
else
{
basket.Amount += Amount;
context.Entry(basket).Property(x => x.Amount).IsModified = true;
basket.Date = DateTime.Now;
}
product.Amount -= Amount;
context.Entry(product).Property(x => x.Amount).IsModified = true;
// ok, problem jest taki, że zmieniamy basket i product, tylko, że zmieniamy lokalną zmienną chyba, a nie w samej kolekcji i to trzeba sfiksować
await context.SaveChangesAsync();
return(true);
}