VietTH: Implement feature stock manager

Gemfile

@@ -90,4 +90,6 @@ group :development do
   gem 'capistrano-sidekiq', '~> 0.5.2'
 end
 
-gem 'rubocop', '~> 0.32.1'
\ No newline at end of file
+gem 'rubocop', '~> 0.32.1'
+
+gem 'cartman', '~> 2.1.2'
\ No newline at end of file

Gemfile.lock

@@ -70,6 +70,8 @@ GEM
       activesupport (>= 3.2.0)
       json (>= 1.7)
       mime-types (>= 1.16)
+    cartman (2.1.2)
+      redis
     celluloid (0.16.0)
       timers (~> 4.0.0)
     coderay (1.1.0)
@@ -324,6 +326,7 @@ DEPENDENCIES
   capistrano-sidekiq (~> 0.5.2)
   capistrano3-unicorn
   carrierwave (~> 0.10.0)
+  cartman (~> 2.1.2)
   coffee-rails (~> 4.1.0)
   database_cleaner (~> 1.4.1)
   devise (~> 3.5.1)
@@ -359,3 +362,6 @@ DEPENDENCIES
   unicorn
   vacuum (~> 1.3.0)
   web-console (~> 2.0)
+
+BUNDLED WITH
+   1.10.5

app/assets/javascripts/application.js

@@ -13,7 +13,10 @@
 //= require jquery
 //= require jquery_ujs
 //= require jquery.validate.min
+//= require additional-methods
 //= require twitter/bootstrap
+//= require jquery_methods
 //= require product
+//= require order
+//= require main
 //= require ready
-//= require additional-methods

app/assets/javascripts/main.js.coffee

+@mainLib = (->
+
+  return @
+)()
\ No newline at end of file

app/assets/javascripts/order.js.coffee

+@orderLib = (->
+  @validateCheckoutForm = ->
+    $('#checkout-cart form').validate()
+    jQuery.validator.addClassRules 'input-quantity', {
+      required: true
+      number: true
+      min: 1
+    }
+
+    $('.input-quantity').each ->
+      $(this).rules 'add', {max: $(this).data('max')}
+
+
+  return @
+)()
\ No newline at end of file

app/assets/javascripts/product.js.coffee

@@ -11,5 +11,16 @@
           required: true
           accept: "image/*"
 
+  @validateQuantity = ->
+    $('.form-quantity').each ->
+      $(this).validate
+        rules:
+          quantity:
+            required: true
+            number: true
+            min: 1
+            max: $(this).find('.max-quantity').val()
+        errorPlacement: -> {}
+
   return @
 )()
\ No newline at end of file

app/assets/javascripts/ready.js.coffee

 $(document).ready ->
-  window.productLib.validateForm()
\ No newline at end of file
+  window.productLib.validateForm()
+  window.productLib.validateQuantity()
+  window.orderLib.validateCheckoutForm()

app/assets/stylesheets/layout.css.scss

@@ -31,10 +31,17 @@ label.error{
   #content{
     .products-list-detail{
       .product-item{
-        height: 70px;
-        .product-image img{
-          width: 51px;
-          height: 32px;
+        margin-bottom: 30px;
+        .product-image{
+          position: relative;
+          &.disable{
+            opacity: 0.4;
+          }
+          img{
+            height: 180px;
+            min-width: 185px;
+            margin-bottom: 5px;
+          }
         }
 
         .product-title{
@@ -42,18 +49,47 @@ label.error{
         }
       }
     }
-    #recommend-items{
-      .product-item{
-        height: 130px;
-        .product-image img{
-          width: 71px;
-          height: 38px;
-        }
 
-        .product-title{
-          margin: 10px 0;
-        }
+    .stock{
+      display: inline-block;
+      bottom: 0;
+      padding: 7px 10px;
+      opacity: 1;
+      color: white;
+      border: 1px solid #ccc;
+      height: 35px;
+    }
+
+    .stock{
+      background-color: #000;
+      float: left;
+    }
+
+    .product-addto-cart{
+      text-align: right;
+      width: 90px;
+      float: right;
+      .quantity{
+        width: 40px;
+        height: 35px;
+        display: inline-block;
+        text-align: center;
       }
+      .btn-add{
+        width: 50px;
+        height: 35px;
+        display: inline-block;
+        border-radius: 0;
+        border-left: 0;
+      }
+    }
+
+    .product-price{
+      font-size: 20px;
+      color: #007BFF;
+      width: 100px;
+      margin: 0 auto 10px;
+      background-color: #ddd;
     }
   }
 
@@ -73,4 +109,20 @@ footer{
   background-color: #ccc;
   padding: 15px 0 0 0;
   height: 45px;
+  margin-top: 20px;
+}
+
+#cart-info{
+  .list-cart-item{
+    .item{
+      float: left;
+      width: 100%;
+      padding: 5px 0;
+    }
+  }
+  .total{
+    font-weight: bold;
+    margin: 11px 0;
+    font-size: 20px;
+  }
 }
\ No newline at end of file

app/controllers/concerns/orders_management.rb

-module OrdersManagement extend ActiveSupport::Concern
-  included do
-    def add_to_cart product
-      order_item = {
-        'id' => product.id,
-        'title' => product.title,
-        'price' => product.price,
-        'quantity' => 1
-      }
-      unless session['cart_info']['items'].include?(order_item)
-        session['cart_info']['items'].push(order_item)
-        session['cart_info']['total'] += 1
-      end
-    end
-
-    def clear_cart
-      session['cart_info'] = nil
-    end
-
-    def session_cart
-      session['cart_info'].with_indifferent_access
-    end
-  end
-end
\ No newline at end of file

app/controllers/orders_controller.rb

 class OrdersController < ApplicationController
-  include OrdersManagement
-
   before_action :authenticate_user!
 
   def index
-    @order = Order.new
   end
 
   def create
-    if order_service.create(order_params)
-      clear_cart
+    result = order_service.create(cart_params)
+    if result[:status].present?
       redirect_to(root_path, notice: 'Checkout is successful.')
     else
+      flash[:alert] = result[:messages]
       render :index
     end
   end
 
   private
-  def order_params
-    params.require(:order).permit(:total, order_items_attributes: [:product_id, :quantity])
+  def cart_params
+    params.require(:cart).permit(items: [:id, :quantity])
   end
 
   def order_service

app/controllers/products_controller.rb

 class ProductsController < ApplicationController
-  include OrdersManagement
-
   before_action :set_product, only: [:show, :add_cart]
   before_action :set_categories, only: [:new]
   before_action :add_breadcrumb_home
-  before_action :authenticate_user!, only: [:new, :create]
+  before_action :authenticate_user!, only: [:new, :create, :add_cart]
 
   def new
     @product = Product.new
@@ -26,8 +24,12 @@ class ProductsController < ApplicationController
   end
 
   def add_cart
-    add_to_cart(@product)
-    redirect_to(@product, notice: 'Product is added to cart.')
+    result = order_service.add_to_cart(@product)
+    if result[:status].present?
+      redirect_to :back
+    else
+      redirect_to :back, alert: "Quanity must have less than #{@product.stock}"
+    end
   end
 
   def search
@@ -49,4 +51,8 @@ class ProductsController < ApplicationController
     params.require(:product).permit(:title, :price, :category_id, :image)
   end
 
+  def order_service
+    @order_service ||= OrderService.new(current_user, params)
+  end
+
 end
\ No newline at end of file

app/decorators/product_decorator.rb

@@ -6,15 +6,15 @@ class ProductDecorator < Draper::Decorator
   end
 
   def image_sm_url
-    object.amazon? ? object.image_sm_url : object.image.small.url
+    (object.amazon? && object.image_sm_url) ? object.image_sm_url : object.image.small.url
   end
 
   def image_md_url
-    object.amazon? ? object.image_md_url : object.image.medium.url
+    (object.amazon? && object.image_md_url) ? object.image_md_url : object.image.medium.url
   end
 
   def image_lg_url
-    object.amazon? ? object.image_lg_url : object.image.large.url
+    (object.amazon? && object.image_lg_url) ? object.image_lg_url : object.image.large.url
   end
 
   def short_title

app/helpers/application_helper.rb

 module ApplicationHelper
-  def session_cart
-    (session[:cart_info] ||= {items: [], total: 0}).with_indifferent_access
+  def cart_valid?
+    user_signed_in? && !current_user.cart.count.zero?
   end
 end

app/models/category.rb

 class Category < ActiveRecord::Base
   default_scope { order(:title) }
 
-  JSON_DEFAULT = %i(id title)
+  JSON_DEFAULT = %i(id title products_count)
 
   has_many :products, dependent: :destroy
 

app/models/order_item.rb

 class OrderItem < ActiveRecord::Base
   belongs_to :order
   belongs_to :product
+
+  before_save :update_product_quantity
+
+  def update_product_quantity
+    self.product.decrement!(:stock, self.quantity)
+  end
 end

app/models/product.rb

@@ -6,7 +6,7 @@ class Product < ActiveRecord::Base
   scope :newest, ->{ self.order(created_at: :desc).limit(Settings.limit_product_newest) }
 
   # relations
-  belongs_to :category
+  belongs_to :category, counter_cache: true
   belongs_to :user
 
   # validates

app/models/user.rb

@@ -8,4 +8,9 @@ class User < ActiveRecord::Base
   # :confirmable, :lockable, :timeoutable and :omniauthable
   devise :database_authenticatable, :registerable,
          :recoverable, :rememberable, :trackable, :validatable
+
+  def cart
+    Cartman::Cart.new(self.id)
+  end
+
 end

app/services/order_service.rb

 class OrderService < BaseService
 
-  def create(order_params)
-    order = current_user.orders.build(order_params)
-
-    product_ids = []
-    quantites = {}
-    order_params['order_items_attributes'].each do |item|
-      id = item.last['product_id']
-      product_ids << id
-      quantites[id] = item.last['quantity']
-    end
+  def add_to_cart product
+    quantity =  if current_user.cart.contains?(product)
+                  cart_item = current_user.cart.find(product)
+                  cart_item.destroy
+                  params[:quantity].to_i + cart_item.quantity.to_i
+                else
+                  params[:quantity].to_i
+                end
 
-    products = Product.where(id: [product_ids]).select(:id, :price)
-    total = products.inject(0) do |sum, product|
-      sum + (product.price.to_i * quantites[product.id.to_s].to_i)
+    if quantity <= product.stock
+      current_user.cart.add_item(
+        id: product.id,
+        name: product.title,
+        unit_cost: product.price,
+        cost: (product.price || 0) * quantity,
+        quantity: quantity,
+        type: Product,
+        stock: product.stock
+      )
+      {status: true}
+    else
+      {status: false, message: "Quanity must have less than #{product.stock}"}
     end
-    order.total = total
+  end
 
-    if order.save
-      send_checkout_email(order)
-      {status: true}
+  def create(cart_params)
+    result = update_cart_info(cart_params['items'].values)
+    if result[:status].present?
+      order_items_attributes = current_user.cart.items.map do |item|
+        {product_id: item.id, quantity: item.quantity, price: item.unit_cost}
+      end
+
+      order = current_user.orders.build(
+        order_items_attributes: order_items_attributes,
+        total: current_user.cart.total
+      )
+
+      if order.save
+        current_user.cart.destroy!
+        send_checkout_email(order)
+        {status: true}
+      else
+        {status: false}
+      end
     else
-      {status: false}
+      {status: false, message: result[:messages].join(',')}
     end
   end
 
@@ -30,4 +54,29 @@ class OrderService < BaseService
     OrderMailer.send_checkout(current_user.email, order).deliver_later
   end
 
+  def update_cart_info(items)
+    products = Product.where(items.map { |item| item['id'] })
+    products = products.inject({}) do |list, product|
+      list[product.id.to_s] = product
+      list
+    end
+
+    errors = []
+    items.each do |item|
+      product = products[item['id']]
+      if item['quantity'].to_i > product.stock
+        errors.push(product.id)
+      else
+        cart_item = current_user.cart.find(product)
+        cart_item.quantity = item['quantity']
+      end
+    end
+
+    if errors.present?
+      {status: false, messages: errors}
+    else
+      {status: true}
+    end
+  end
+
 end
\ No newline at end of file

app/uploaders/image_uploader.rb

@@ -57,4 +57,8 @@ class ImageUploader < CarrierWave::Uploader::Base
   #   "something.jpg" if original_filename
   # end
 
+  def default_url
+    ActionController::Base.helpers.asset_path('no-image.jpg')
+  end
+
 end

app/views/categories/_category.html.haml

 %li
-  = link_to category.decorate.title, category
\ No newline at end of file
+  = link_to "#{category.decorate.title} (#{category.decorate.products_count})", category
\ No newline at end of file

app/views/categories/_recommended.html.haml

-- products.each do |product|
-  .product-item.col-md-4.text-center
-    .product-title
-      = link_to product.decorate.short_title, product
-    .product-image.img-thumbnail
-      = image_tag product.decorate.image_md_url
-
+= render products
\ No newline at end of file

app/views/home/index.html.haml

 .module
   %h3.title Recommended Items
 .module
-  #recommend-items
+  #recommend-items.products-list-detail
     = render 'categories/recommended', products: @recommended_items
 
 .clearfix

app/views/layouts/_cart.html.haml

-#cart-info
-  %h3.title Category
-  = "Total: #{pluralize(session_cart[:total], 'item')}"
-  = link_to 'Checkout', orders_path, class: 'btn btn-default pull-right'
\ No newline at end of file
+- if cart_valid?
+  #cart-info
+    %h3.title Cart info
+    .col-md-9 Title
+    .col-md-3.text-right Quantity
+    .list-cart-item
+      - current_user.cart.items.each do |item|
+        .item
+          .col-md-9
+            = link_to item.name.truncate(25, separator: ' '), product_path(item.id)
+          .col-md-3.text-right
+            = item.quantity
+    .clearfix
+    .total.col-md-12
+      Total:
+      = current_user.cart.total
+    .checkout.col-md-12
+      = link_to 'Checkout', orders_path, class: 'btn btn-primary'

app/views/layouts/application.html.haml

@@ -32,6 +32,7 @@
         .col-md-10
           = yield
 
+    .clearfix
     %footer.footer
       .container
         %p.text-muted Footer
\ No newline at end of file

app/views/orders/index.html.haml

-#checkout-cart
-  = form_for @order do |f|
-    %table.table
-      %thead
-        %tr
-          %td.text-right #
-          %td Title
-          %td Price
-          %td Quantity
-      %tbody
-        - session_cart[:items].each_with_index do |order_item, index|
+- if cart_valid?
+  #checkout-cart
+    = form_for Order.new do |f|
+      %table.table
+        %thead
           %tr
-            %td.number.text-right
-              = index + 1
-            %td.title
-              = link_to order_item[:title], product_path(order_item[:id])
-              = hidden_field_tag "order[order_items_attributes][#{index}][product_id]", order_item[:id]
-            %td.price
-              = order_item[:price]
-            %td.quantity
-              = text_field_tag "order[order_items_attributes][#{index}][quantity]", order_item[:quantity]
-      %tfoot
-        %tr
-          %td.text-right{colspan: 4}
-            = f.submit 'Checkout', class: 'btn btn-primary'
+            %td.text-right #
+            %td Title
+            %td Price
+            %td Stock
+            %td Quantity
+        %tbody
+          - current_user.cart.items.each_with_index do |order_item, index|
+            %tr
+              %td.number.text-right
+                = index + 1
+              %td.title
+                = link_to order_item.name, product_path(order_item.id)
+                = hidden_field_tag "cart[items][#{index}][id]", order_item.id
+              %td.price
+                = order_item.unit_cost
+              %td
+                = order_item.stock
+              %td.quantity
+                = text_field_tag "cart[items][#{index}][quantity]", order_item.quantity, class: 'form-control compare input-quantity', data: {max: order_item.stock}
+
+        %tfoot
+          %tr
+            %td.text-right{colspan: 5}
+              = f.submit 'Checkout', class: 'btn btn-primary'
 

app/views/products/_add_to_cart_btn.html.haml

+.product-addto-cart.input-group
+  - max_quantity = product.stock - current_user.cart.find(product).try(:quantity).to_i
+  = form_tag add_cart_product_path(product), method: :get, class: 'form-quantity' do
+    = text_field_tag :quantity, 1, class: 'form-control quantity'
+    = hidden_field_tag :stock, max_quantity, class: 'max-quantity'
+    .input-group-btn
+      = submit_tag 'Add', class: "btn-add btn btn-default", disabled: product.stock.zero?

app/views/products/_product.html.haml

-.row.product-item
-  .col-md-1
-    .product-image.img-thumbnail
-      %img{src: product.decorate.image_sm_url}
-  .col-md-9
-    .product-title
-      = link_to product.decorate.short_title, product_path(product)
-  - if local_assigns.has_key?(:show_price) && show_price.present?
-    .col-md-2
-      .product-price
-        Price:
-        = product.decorate.price
\ No newline at end of file
+.product-item.col-md-4.text-center
+  .product-title
+    = link_to product.decorate.short_title, product
+  .product-price
+    = product.decorate.price
+  .product-image.img-thumbnail{class: "#{'disable' if product.stock.zero?}"}
+    = image_tag product.decorate.image_lg_url, class: 'img-reponsive'
+
+    .clearfix
+    %span.stock
+      Stock:
+      = product.stock
+    = render 'products/add_to_cart_btn', product: product

app/views/products/show.html.haml

-#product-detail
-  .product-title
-    %h4= @product.title
-  .product-image
-    = image_tag @product.decorate.image_lg_url, class: 'img-thumbnail'
-  .product-id
-    Item ID:
-    = @product.id
-  .product-price
-    Price:
-    = @product.decorate.price
-  .product-date
-    Date:
-    = l(@product.created_at)
+#product-detail.products-list-detail
+  = render 'product', product: @product
 
   .clearfix
 
-  .product-addto-cart
-    = link_to 'Buy', add_cart_product_path(@product), class: 'btn btn-primary'
\ No newline at end of file
+  .col-md-4.text-center
+    .product-id
+      Item ID:
+      = @product.id
+    .product-date
+      Date:
+      = l(@product.created_at)
+
+  .clearfix
\ No newline at end of file

config/environments/development.rb

@@ -39,7 +39,7 @@ Rails.application.configure do
   # Raises error for missing translations
   # config.action_view.raise_on_missing_translations = true
 
-  # config.action_mailer.delivery_method = :letter_opener
+  config.action_mailer.delivery_method = :letter_opener
   config.action_mailer.smtp_settings = {
       :address   => "smtp.mandrillapp.com",
       :port      => 587,
@@ -48,7 +48,7 @@ Rails.application.configure do
     }
   # ActionMailer Config
   config.action_mailer.default_url_options = { :host => 'localhost', port: 3000 }
-  config.action_mailer.delivery_method = :smtp
+  # config.action_mailer.delivery_method = :smtp
   config.action_mailer.perform_deliveries = true
   config.action_mailer.raise_delivery_errors = false
 end

config/settings.yml

 defaults: &defaults
   limit_category: 5
   limit_product_recommended: 6
-  limit_product_newest: 4
+  limit_product_newest: 9
   limit_length_category_title: 50
 
 development:

db/migrate/20150713093527_add_stock_to_products.rb

+class AddStockToProducts < ActiveRecord::Migration
+  def change
+    add_column :products, :stock, :integer, default: 0
+  end
+end

db/migrate/20150713093724_add_products_count_to_categories.rb

+class AddProductsCountToCategories < ActiveRecord::Migration
+  def change
+    add_column :categories, :products_count, :integer, default: 0
+  end
+end

db/schema.rb

@@ -11,14 +11,15 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150708092744) do
+ActiveRecord::Schema.define(version: 20150713093724) do
 
   create_table "categories", force: :cascade do |t|
-    t.datetime "created_at",                            null: false
-    t.datetime "updated_at",                            null: false
-    t.string   "node_id",       limit: 255
-    t.string   "title",         limit: 255
-    t.integer  "category_type", limit: 4,   default: 0
+    t.datetime "created_at",                             null: false
+    t.datetime "updated_at",                             null: false
+    t.string   "node_id",        limit: 255
+    t.string   "title",          limit: 255
+    t.integer  "category_type",  limit: 4,   default: 0
+    t.integer  "products_count", limit: 4,   default: 0
   end
 
   create_table "order_items", force: :cascade do |t|
@@ -55,6 +56,7 @@ ActiveRecord::Schema.define(version: 20150708092744) do
     t.integer  "product_type", limit: 4,                  default: 0
     t.string   "image",        limit: 255
     t.integer  "user_id",      limit: 4
+    t.integer  "stock",        limit: 4,                  default: 0
   end
 
   add_index "products", ["category_id"], name: "index_products_on_category_id", using: :btree

lib/tasks/aws.rake

@@ -44,6 +44,7 @@ namespace :aws do
       product.image_md_url  = item['MediumImage'].try(:[], 'URL')
       product.image_sm_url  = item['SmallImage'].try(:[], 'URL')
       product.price         = item['ItemAttributes']['ListPrice'].try(:[], 'Amount').try(:to_i)
+      product.stock         = 5 #item['ItemAttributes']['BinItemCount'].to_i
       product.product_type  = Product.product_types[:amazon]
       product.user          = User.first
     end