cart

cart

import "github.com/blueprint-uservices/blueprint/examples/sockshop/workflow/cart"

Package cart implements the SockShop cart microservice.

Index

• type CartService
  • func NewCartService(ctx context.Context, db backend.NoSQLDatabase) (CartService, error)
• type Item

type CartService

The CartService interface

type CartService interface {
    // Get all items in a customer's cart.  A customer might not have a cart,
    // in which case the empty list is returned.  customerID can be a userID
    // for a logged in user, or a sessionID for an anonymous user.
    GetCart(ctx context.Context, customerID string) ([]Item, error)

    // Delete a customer's cart
    DeleteCart(ctx context.Context, customerID string) error

    // Merge two carts.  Used when an anonymous customer logs in
    MergeCarts(ctx context.Context, customerID, sessionID string) error

    // Get a specific item from a customer's cart
    GetItem(ctx context.Context, customerID string, itemID string) (Item, error)

    // Add an item to a customer's cart.
    // If the item already exists in the cart, then the total quantity is
    // updated to reflect the combined total.
    // Returns the current state of the item in the customer's cart.
    AddItem(ctx context.Context, customerID string, item Item) (Item, error)

    // Remove an item from the customer's cart
    RemoveItem(ctx context.Context, customerID, itemID string) error

    // Updates an item in the customer's cart to the value provided.
    UpdateItem(ctx context.Context, customerID string, item Item) error
}

func NewCartService

func NewCartService(ctx context.Context, db backend.NoSQLDatabase) (CartService, error)

Creates a CartService instance that persists cart data in the provided db

type Item

A cart item is just an item ID and a quantity. The catalogue service is responsible for managing the actual items.

type Item struct {
    ID        string  // Item ID will correspond to the ID used by the catalogue service
    Quantity  int     // The quantity of this item in the car
    UnitPrice float32 // The price of the item
}

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