Inventory and Cart

config-inventory.yaml

:GR1:
  :name: Green Tea
  :price: 3.11
:SR1:
  :name: Strawberries
  :price: 5.00
:CF1:
  :name: Coffee
  :price: 11.23

lib-checkout.rb

class Checkout
  def initialize
    @basket = {}
  end

  def scan(item)
    product_code = item.keys.first

    if @basket.has_key? product_code
      @basket[:product_code][:quantity] += 1
    else
      @basket[:product_code] = item
      @basket[:product_code][:quantity] = 0
    end
  end
end

lib-inventory.rb

require 'yaml'

INVENTORY_LIST = File.join(File.dirname(__FILE__), "..", "config/", "inventory.yaml")

class Inventory
  attr_reader :items
  def initialize
    @items = YAML.load_file INVENTORY_LIST
  end
end