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ShoppingCart.cs
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ShoppingCart.cs
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using ECommerce.ShoppingCarts.ProductItems;
namespace ECommerce.ShoppingCarts;
public record ShoppingCartOpened(
Guid ShoppingCartId,
Guid ClientId
);
public record ProductItemAddedToShoppingCart(
Guid ShoppingCartId,
PricedProductItem ProductItem
);
public record ProductItemRemovedFromShoppingCart(
Guid ShoppingCartId,
PricedProductItem ProductItem
);
public record ShoppingCartConfirmed(
Guid ShoppingCartId,
DateTime ConfirmedAt
);
public record ShoppingCartCanceled(
Guid ShoppingCartId,
DateTime CanceledAt
);
public enum ShoppingCartStatus
{
Pending = 1,
Confirmed = 2,
Canceled = 4,
Closed = Confirmed | Canceled
}
public record ShoppingCart(
Guid Id,
Guid ClientId,
ShoppingCartStatus Status,
ProductItemsList ProductItems,
DateTime? ConfirmedAt = null,
DateTime? CanceledAt = null
)
{
public bool IsClosed => ShoppingCartStatus.Closed.HasFlag(Status);
public static ShoppingCart When(ShoppingCart entity, object @event)
{
return @event switch
{
ShoppingCartOpened (var cartId, var clientId) =>
entity with
{
Id = cartId,
ClientId = clientId,
Status = ShoppingCartStatus.Pending,
ProductItems = ProductItemsList.Empty()
},
ProductItemAddedToShoppingCart (_, var productItem) =>
entity with
{
ProductItems = entity.ProductItems.Add(productItem)
},
ProductItemRemovedFromShoppingCart (_, var productItem) =>
entity with
{
ProductItems = entity.ProductItems.Remove(productItem)
},
ShoppingCartConfirmed (_, var confirmedAt) =>
entity with
{
Status = ShoppingCartStatus.Confirmed,
ConfirmedAt = confirmedAt
},
ShoppingCartCanceled (_, var canceledAt) =>
entity with
{
Status = ShoppingCartStatus.Canceled,
CanceledAt = canceledAt
},
_ => entity
};
}
public static ShoppingCart Default() =>
new (default, default, default, ProductItemsList.Empty(), default, default);
public static string MapToStreamId(Guid shoppingCartId) =>
$"ShoppingCart-{shoppingCartId}";
}