orderfromcart

README

The Order from Cart Topic Consumer

The Order from Cart Firestore Consumer is a Cloud Function that receives Pub/Sub push messages from the Cart Firestore Trigger Function when a shopping cart is "checked out."

This function converts completed shopping cart descriptions into order descriptions and stores them in
an orders Firestore document collection (i.e. a different collection to that used for the carts).

Documentation

Overview

Package orderfromcart implements a Google Cloud Function to receive a shopping cart description via a Pub/Sub topic. The handler translates the cart into an order and stores it as an order document under Firestore.

Index

• func ConvertCartToOrder(cart *pb.ShoppingCart) (*orders.Order, error)
• func OrderFromCart(w http.ResponseWriter, r *http.Request)
• func OrderItemItemFromShoppingCartPB(pbItem *pb.CartItem) *orders.OrderItem

Functions

func ConvertCartToOrder

func ConvertCartToOrder(cart *pb.ShoppingCart) (*orders.Order, error)

ConvertCartToOrder clones the data of a shopping cart into an order structure

func OrderFromCart

func OrderFromCart(w http.ResponseWriter, r *http.Request)

OrderFromCart is Cloud Function entry point. The payload of the HTTP request is a checked out shopping cart expressed as a base64 encoded Protocol Buffer message wrapped in a JSON envelop.

See https://cloud.google.com/pubsub/docs/push for documentation of the request body JSON content.

func OrderItemItemFromShoppingCartPB

func OrderItemItemFromShoppingCartPB(pbItem *pb.CartItem) *orders.OrderItem

OrderItemItemFromShoppingCartPB is a factory method that returns a ShoppingCartItem representation derived from its protocol buffer equivalent.