public void AddCourse(int quantity, Course course, ApplicationUser user)
{
// 1. Avoid duplicate order
var isOrderDuplicate = ShoppingCartItems.Select(i => i.CourseId).Contains(course.Id);
if (isOrderDuplicate)
{
throw new ShoppingCartValidationException("Course \"" + course.Title + "\" already in your ShoppingCart.");
}
// 2. check course state
if (!course.IsActivate)
{
throw new ShoppingCartValidationException("Course \"" + course.Title + "\" is not activate, please remove it from your selection.");
}
// 3. check user purchase history, avoid duplicate purchase
if (user.PurchasedCourses.Any(uc => uc.CourseId == course.Id))
{
throw new ShoppingCartValidationException("Course \"" + course.Title + "\" has already purchased, please check your course list.");
}
// 4. create line item (shoppingCartItem)
var shoppingCartItem = LineItem.Create(quantity, this, course);
// 4. add shoppingCartItem into shoppingCart
ShoppingCartItems.Add(shoppingCartItem);
}
public void InsertIntoCart(Product product, int quantity)
{
RemoveFromCart(product);
ShoppingCartItems.Add(new ShoppingCartItemDTO()
{
Product = product,
Quantity = quantity
});
}
public void PopulateShoppingCartItemsByLineItems(List <AddItemViewModel> lineItems)
{
foreach (var lineItem in lineItems)
{
var item = _context.Items.Find(lineItem.ItemId);
var lineItemTotal = item.Price * lineItem.Quantity;
ShoppingCartItems.Add(new ShoppingCartLineItemViewModel
{
ItemId = lineItem.ItemId,
Item = item,
Quantity = lineItem.Quantity,
Total = lineItemTotal
});
Total += lineItemTotal;
}
}
public void PopulateShoppingCartItemsByCustomerId(string customerId)
{
var lineItems = _context.ShoppingCartLineItems.Include(li => li.Item).Where(li => li.CustomerId == customerId).ToList();
foreach (var lineItem in lineItems)
{
var lineItemTotal = lineItem.Item.Price * lineItem.Quantity;
ShoppingCartItems.Add(new ShoppingCartLineItemViewModel
{
ItemId = lineItem.ItemId,
Item = lineItem.Item,
Quantity = lineItem.Quantity,
Total = lineItemTotal
});
Total += lineItemTotal;
}
}
public void addItem(Product product, int quantity)
{
if (product == null)
{
throw new ArgumentNullException("Product is Null");
}
if (quantity > 0)
{
if (ShoppingCartItems.ContainsKey(product))
{
ShoppingCartItems[product] += quantity;
}
else
{
ShoppingCartItems.Add(product, quantity);
}
}
}