public async Task SubtractProductAsync(string browserId, string productId, int count)
{
CoreValidator.ThrowIfAnyNullOrWhitespace(browserId, productId);
var shoppingCart = await this.shoppingCartRepository.GetAsync(browserId);
CoreValidator.ThrowIfNull(shoppingCart);
var orderItems = shoppingCart.Items;
var item = orderItems.FirstOrDefault(i => i.Product.Id == productId && i.Count > 0);
if (item == null)
{
return;
}
item.Count -= count;
if (item.Count <= 0)
{
orderItems = orderItems.Where(oi => oi.Product.Id != productId).ToList();
}
shoppingCart.UpdateItems(orderItems);
await this.shoppingCartRepository.UpdateAsync(shoppingCart);
}
public async Task AddProductAsync(string browserId, string productId, int count)
{
CoreValidator.ThrowIfAnyNullOrWhitespace(browserId, productId);
var shoppingCart = await this.shoppingCartRepository.GetAsync(browserId);
if (shoppingCart == null)
{
var newCart = this.shoppingCartFactory.CreateInstance(browserId);
await this.shoppingCartRepository.AddAsync(newCart);
shoppingCart = await this.shoppingCartRepository.GetAsync(browserId);
}
var product = await this.productRepository.GetAsync(productId);
CoreValidator.ThrowIfNull(product);
if (product.IsDeleted)
{
throw new InvalidOperationException($"Product with id: {productId} is deleted!");
}
var item = shoppingCart.Items.FirstOrDefault(i => i.Product.Id == productId);
if (item == null)
{
item = new OrderItem
{
Product = product,
Count = 0
};
}
item.Count += count;
if (item.Count > item.Product.Availability)
{
return;
}
var newItems = shoppingCart.Items.Where(i => i.Product.Id != productId).ToList();
newItems.Add(item);
shoppingCart.UpdateItems(newItems);
await this.shoppingCartRepository.UpdateAsync(shoppingCart);
}
public async Task RemoveProductAsync(string browserId, string productId)
{
CoreValidator.ThrowIfAnyNullOrWhitespace(browserId, productId);
var shoppingCart = await this.shoppingCartRepository.GetAsync(browserId);
CoreValidator.ThrowIfNull(shoppingCart);
var orderItems = shoppingCart.Items;
var item = orderItems.FirstOrDefault(i => i.Product.Id == productId);
if (item == null)
{
return;
}
var newItems = orderItems.Where(oi => oi.Product.Id != productId).ToList();
shoppingCart.UpdateItems(newItems);
await this.shoppingCartRepository.UpdateAsync(shoppingCart);
}