1  #---
   2  # Excerpted from "Agile Web Development with Rails, 3rd Ed.",
   3  # published by The Pragmatic Bookshelf.
   4  # Copyrights apply to this code. It may not be used to create training material, 
   5  # courses, books, articles, and the like. Contact us if you are in doubt.
   6  # We make no guarantees that this code is fit for any purpose. 
   7  # Visit http://www.pragmaticprogrammer.com/titles/rails3 for more book information.
   8  #---
   9 
  10  class StoreController < ApplicationController
  11 
  12        
  13        before_filter :find_cart, :except => :empty_cart
  14        
  15    
  16    def index
  17      @products = Product.find_products_for_sale
  18    end
  19    
  20 
  21 
  22    
  23    
  24    def add_to_cart
  25      product = Product.find(params[:id])
  26      @current_item = @cart.add_product(product)
  27      respond_to do |format|
  28        format.js if request.xhr?
  29        format.html {redirect_to_index}
  30      end
  31    rescue ActiveRecord::RecordNotFound
  32      logger.error("Attempt to access invalid product #{params[:id]}")
  33      redirect_to_index("Invalid product")
  34    end
  35    
  36 
  37 
  38    
  39    
  40    def checkout
  41      if @cart.items.empty?
  42        redirect_to_index("Your cart is empty")
  43      else
  44        @order = Order.new
  45      end
  46    end
  47    
  48 
  49    
  50    def save_order
  51      @order = Order.new(params[:order])
  52      @order.add_line_items_from_cart(@cart)
  53      if @order.save
  54        session[:cart] = nil
  55        redirect_to_index(I18n.t('flash.thanks'))
  56      else
  57        render :action => 'checkout'
  58      end
  59    end
  60    
  61 
  62    def empty_cart
  63      session[:cart] = nil
  64      redirect_to_index
  65    end
  66    
  67 
  68  private
  69 
  70    
  71    def redirect_to_index(msg = nil)
  72      flash[:notice] = msg if msg
  73      redirect_to :action => 'index'
  74    end
  75    
  76    
  77 
  78        
  79        def find_cart
  80          @cart = (session[:cart] ||= Cart.new)
  81        end
  82        
  83 
  84 
  85 
  86    #...
  87  protected
  88 
  89    def authorize
  90    end
  91  end
  92