components/LiteCharms.Features/ShoppingCarts/Commands/AddItemToShoppingCartCommand.cs

namespace LiteCharms.Features.ShoppingCarts.Commands;

public class AddItemToShoppingCartCommand : IRequest<Result>
{
    public Guid ShoppingCartId { get; set; }

    public Guid ProductPriceId { get; set; }

    public int Quantity { get; set; }

    private AddItemToShoppingCartCommand(Guid shoppingCartId, Guid productPriceId, int quantity = 1)
    {
        ShoppingCartId = shoppingCartId;
        ProductPriceId = productPriceId;
        Quantity = quantity;
    }

    public static AddItemToShoppingCartCommand Create(Guid shoppingCartId, Guid productPriceId, int quantity = 1)
    {
        if (shoppingCartId == Guid.Empty)
            throw new ArgumentException($"Shopping cart ID is required", nameof(shoppingCartId));

        if (productPriceId == Guid.Empty)
            throw new ArgumentException($"Product item required", nameof(productPriceId));

        if(quantity <= 0) throw new ArgumentException($"Quantity must be at least 1", nameof(quantity));  

        return new(shoppingCartId, productPriceId, quantity);
    }
}