Fix merge request #3

Gemfile

@@ -46,9 +46,12 @@ gem 'devise', '~> 4.3'
 gem 'rubocop', '~> 0.49.1'
 # Use jquery as the JavaScript library
 gem 'jquery-rails'
+# FontAwesome
+gem 'font-awesome-rails', '~> 4.7', '>= 4.7.0.2'
 # Bootstrap TouchSpin is a mobile and touch friendly input spinner component for Bootstrap
 gem 'rails-assets-bootstrap-touchspin', source: 'https://rails-assets.org'
-gem 'font-awesome-rails', '~> 4.7', '>= 4.7.0.2'
+# Simple, efficient background processing for Ruby.
+gem 'sidekiq', '~> 5.0', '>= 5.0.2'
 
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
@@ -59,8 +62,6 @@ group :development, :test do
   # Adds support for Capybara system testing and selenium driver
   gem 'capybara', '~> 2.13'
   gem 'selenium-webdriver'
-  # When mail is sent from your application, Letter Opener will open a preview in the browser instead of sending.
-  gem 'letter_opener', '~> 1.4', '>= 1.4.1'
 end
 
 group :development do
@@ -70,6 +71,8 @@ group :development do
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
   gem 'spring'
   gem 'spring-watcher-listen', '~> 2.0.0'
+  # When mail is sent from your application, Letter Opener will open a preview in the browser instead of sending.
+  gem 'letter_opener', '~> 1.4', '>= 1.4.1'
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem

Gemfile.lock

@@ -73,6 +73,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.0.5)
+    connection_pool (2.2.1)
     devise (4.3.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
@@ -140,6 +141,8 @@ GEM
     public_suffix (2.0.5)
     puma (3.9.1)
     rack (2.0.3)
+    rack-protection (2.0.0)
+      rack
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.1.1)
@@ -177,6 +180,7 @@ GEM
     rb-fsevent (0.9.8)
     rb-inotify (0.9.8)
       ffi (>= 0.5.0)
+    redis (3.3.3)
     responders (2.4.0)
       actionpack (>= 4.2.0, < 5.3)
       railties (>= 4.2.0, < 5.3)
@@ -201,6 +205,11 @@ GEM
       childprocess (~> 0.5)
       rubyzip (~> 1.0)
       websocket (~> 1.0)
+    sidekiq (5.0.2)
+      concurrent-ruby (~> 1.0)
+      connection_pool (~> 2.2, >= 2.2.0)
+      rack-protection (>= 1.5.0)
+      redis (~> 3.3, >= 3.3.3)
     spring (2.0.2)
       activesupport (>= 4.2)
     spring-watcher-listen (2.0.1)
@@ -263,6 +272,7 @@ DEPENDENCIES
   rubocop (~> 0.49.1)
   sass-rails (~> 5.0)
   selenium-webdriver
+  sidekiq (~> 5.0, >= 5.0.2)
   spring
   spring-watcher-listen (~> 2.0.0)
   turbolinks (~> 5)

app/assets/javascripts/shop-14.js.erb → app/assets/javascripts/cart/cart.js

 (function($) {
     // Vertical Spinner - Touchspin - Product Details Quantity input
     if ( $.fn.TouchSpin ) {
-        $('#product_vqty').TouchSpin({
+        $('#product_quantity').TouchSpin({
             verticalbuttons: true
         });
         $('.qty-input').TouchSpin();

app/assets/javascripts/shop-14.js

+(function($) {
+
+}).apply(this, [jQuery]);
\ No newline at end of file

app/assets/javascripts/theme-main.js

-//= require shop-14
\ No newline at end of file
+//= require cart/cart
\ No newline at end of file

app/assets/stylesheets/main_style.scss

@@ -954,7 +954,7 @@ html .featured-box-primary .box-content {
   width: 60px;
 }
 
-.product-details-box .product-detail-qty #product_vqty {
+.product-details-box .product-detail-qty #product_quantity {
   border-radius: 0;
   width: 35px !important;
   border-color: #e1e1e1;

app/controllers/application_controller.rb

 class ApplicationController < ActionController::Base
+  include CartsHelper
+
   protect_from_forgery with: :exception
 
   rescue_from ActiveRecord::RecordNotFound, :with => :render_404
 
-  include CartsHelper
-
   before_action :set_cart
   before_action :configure_permitted_parameters, if: :devise_controller?
 

app/controllers/line_items_controller.rb

@@ -3,6 +3,7 @@ class LineItemsController < ApplicationController
 
   before_action :set_cart, only: [:create, :update, :destroy]
 
+  # We don not render line item details page
   def show
     redirect_to product_url(params[:id])
   end
@@ -10,7 +11,7 @@ class LineItemsController < ApplicationController
   # POST /line_items
   def create
     product = Product.find(params[:product_id])
-    add_to_cart(product.id.to_s, params[:product_vqty].to_i)
+    add_to_cart(product.id.to_s, params[:product_quantity].to_i)
 
     respond_to do |format|
       format.html { redirect_to cart_index_url, notice: "#{product.title} was sucessfully added to your cart" }
@@ -29,11 +30,11 @@ class LineItemsController < ApplicationController
 
   # DELETE /line_items/1
   def destroy
-    remove_from_cart(params[:id])
-    product_title = Product.select(:title).find(params[:id]).title
+    remove_line_item_from_cart(params[:id])
+    product = Product.find(params[:id])
 
     respond_to do |format|
-      format.html { redirect_to cart_index_url, notice: "#{product_title} was sucessfully removed from your cart" }
+      format.html { redirect_to cart_index_url, notice: "#{product.title} was sucessfully removed from your cart" }
     end
   end
 

app/controllers/orders_controller.rb

@@ -5,10 +5,10 @@ class OrdersController < ApplicationController
   before_action :authenticate_user!, only: :new
   before_action :set_cart, only: [:new, :create]
   before_action :get_line_items, only: :new
-  before_action :ensure_cart_is_not_empty, only: :new
 
   # GET /orders/new
   def new
+    redirect_to root_url if @cart.blank?
     @order = Order.new
   end
 
@@ -20,10 +20,10 @@ class OrdersController < ApplicationController
     respond_to do |format|
       if @order.save
         destroy_cart_session
-        OrderMailer.order_detail(current_user, @order).deliver_now
-        format.html { redirect_to root_url }
+        OrderMailer.send_order_detail_to_user(current_user, @order).deliver_later
+        format.html { redirect_to root_url, notice: 'Your order is successfully created' }
       else
-        format.html { redirect_to root_url }
+        format.html { redirect_to root_url, notice: 'Your order can not be created' }
       end
     end
   end
@@ -33,10 +33,4 @@ class OrdersController < ApplicationController
       order.line_items.create(product_id: product_id, quantity: product_attrs['quantity'])
     end
   end
-
-  private
-
-  def ensure_cart_is_not_empty
-    redirect_to root_url if @cart.blank?
-  end
 end
\ No newline at end of file

app/helpers/carts_helper.rb

@@ -5,7 +5,7 @@ module CartsHelper
   end
 
   def add_to_cart(product_id, quantity)
-    return remove_from_cart(product_id) if quantity.zero?
+    return if quantity.zero?
     if @cart.key?(product_id)
       @cart[product_id][:quantity.to_s] += quantity
     else
@@ -16,14 +16,14 @@ module CartsHelper
   def update_cart_item(product_id, quantity)
     return unless @cart.key?(product_id)
     if quantity.to_i.zero?
-      remove_from_cart(product_id)
+      remove_line_item_from_cart(product_id)
     else
       @cart[product_id][:quantity.to_s] = quantity.to_i
     end
   end
 
-  def remove_from_cart(product_id)
-    @cart = @cart.delete(product_id) if @cart.key?(product_id)
+  def remove_line_item_from_cart(product_id)
+    @cart.tap { |cart| cart.delete(product_id) } if @cart.key?(product_id)
   end
 
   def destroy_cart_session
@@ -32,8 +32,8 @@ module CartsHelper
 
   def cart_total_price
     @cart.sum do |product_id, product_attrs|
-      product_price = Product.select(:price).find(product_id).price
-      product_price * product_attrs['quantity'].to_i
+      product = Product.find(product_id)
+      product.price * product_attrs[:quantity.to_s].to_i
     end
   end
 

app/mailers/order_mailer.rb

 class OrderMailer < ApplicationMailer
-  def order_detail(user, order)
+  def send_order_detail_to_user(user, order)
     @user = user
     @order = order
 
-    mail to: user.email, subject: "Order detail"
+    mail to: user.email, subject: "Order detail #{@order.id}"
   end
 end

app/models/line_item.rb

@@ -2,13 +2,6 @@ class LineItem < ApplicationRecord
   belongs_to :product, optional: true
   belongs_to :order, optional: true
 
-  def create_line_items_from_cart(cart)
-    cart.each do |product_id, product_attrs|
-      LineItem.create(product_id: product_id,
-                      quantity: product_attrs['quantity'])
-    end
-  end
-
   def total_price
     product.price * quantity
   end

app/views/products/show.html.erb

@@ -24,7 +24,7 @@
           <div class="product-actions">
             <%= form_tag line_items_path(product_id: @product), remote: true do %>
                 <div class="product-detail-qty">
-                  <%= number_field_tag :product_vqty, 1, min: 0, class: 'vertical-spinner' %>
+                  <%= number_field_tag :product_quantity, 1, min: 0, class: 'vertical-spinner' %>
                 </div>
                 <%= submit_tag 'Add to cart', class: 'addtocart' %>
             <% end %>