closes #7

.byebug_history

@@ -1,3 +1,7 @@
+quit
+page.html
+page.body
+page.html
 continue
 page.html
 quit

.gitignore

@@ -16,3 +16,4 @@
 /*.swo
 *.swo
 .env
+/coverage/*

Gemfile

@@ -37,4 +37,5 @@ group :test do
   gem 'rspec-collection_matchers'
   gem 'rspec-rails'
   gem 'capybara'
+  gem 'poltergeist'
 end

Gemfile.lock

@@ -62,6 +62,7 @@ GEM
       xpath (~> 2.0)
     climate_control (0.0.3)
       activesupport (>= 3.0)
+    cliver (0.3.2)
     cocaine (0.5.8)
       climate_control (>= 0.0.3, < 1.0)
     coderay (1.1.1)
@@ -136,6 +137,10 @@ GEM
       activesupport (>= 3.1)
       arel
     pkg-config (1.1.7)
+    poltergeist (1.10.0)
+      capybara (~> 2.1)
+      cliver (~> 0.3.1)
+      websocket-driver (>= 0.2.0)
     rack (1.6.4)
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -232,6 +237,9 @@ GEM
       binding_of_caller (>= 0.7.2)
       railties (>= 4.0)
       sprockets-rails (>= 2.0, < 4.0)
+    websocket-driver (0.6.4)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.2)
     will_paginate (3.1.0)
     xpath (2.0.0)
       nokogiri (~> 1.3)
@@ -255,6 +263,7 @@ DEPENDENCIES
   paperclip
   pg (~> 0.15)
   pg_search
+  poltergeist
   rails (= 4.2.7.1)
   rake
   rspec-collection_matchers

app/assets/javascripts/likes.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/stylesheets/likes.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the likes controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/likes_controller.rb

@@ -0,0 +1,8 @@
+class LikesController < ApplicationController
+
+  def create
+    @instruction = Instruction.find_by(title: params[:format].gsub('-', ' '))
+    @instruction.likes.create_with_user({}, current_user)
+    redirect_to(:back)
+  end
+end

app/helpers/likes_helper.rb

@@ -0,0 +1,2 @@
+module LikesHelper
+end

app/models/instruction.rb

@@ -1,5 +1,6 @@
 class Instruction < ActiveRecord::Base
   include PgSearch
+  include WithUserAssociationExtension
   extend FriendlyId
 
   friendly_id :title, use: :slugged
@@ -12,6 +13,8 @@ class Instruction < ActiveRecord::Base
 
   belongs_to :user
   belongs_to :category
+  has_many :likes, -> { extending WithUserAssociationExtension },
+            dependent: :destroy
 
   has_attached_file :image, styles: { medium: "300x300>", thumb: "100x100>" }, default_url: "/images/:style/missing.png"
   validates_attachment_content_type :image, content_type: /\Aimage\/.*\z/

app/models/like.rb

@@ -0,0 +1,4 @@
+class Like < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :instruction
+end

app/models/user.rb

@@ -5,4 +5,5 @@ class User < ActiveRecord::Base
          :recoverable, :rememberable, :trackable, :validatable
 
   has_many :instructions
+  has_many :likes
 end

app/models/with_user_association_extension.rb

@@ -0,0 +1,18 @@
+module WithUserAssociationExtension
+
+  def create_with_user(attributes = {}, user)
+    attributes[:user] ||= user
+    create(attributes)
+  end
+
+  def create_with_user!(attributes = {}, user)
+    attributes[:user] ||= user
+    create!(attributes)
+  end
+
+  def build_with_user(attributes = {}, user)
+    attributes[:user] ||= user
+    build(attributes)
+  end
+
+end

app/views/instructions/show.html.erb

@@ -5,6 +5,11 @@
   <%= image_tag @instruction.image.url(:thumb) %>
   Category: <%= @instruction.category.name %>
   <br>
+  Total <%= @instruction.likes.count %> likes
+  <br />
+  <%= form_tag likes_path(@instruction), :method => :post %>
+  <%= submit_tag 'Like' %>
+
 
   <div id="disqus_thread"></div>
 

config/routes.rb

@@ -4,6 +4,7 @@
 
   devise_for :users
 
+  resources :likes
   resources :instructions
   resources :searches, :path => '/search'
   resources :categories, :path => '/category'

coverage/.last_run.json

@@ -1,5 +1,5 @@
 {
   "result": {
-    "covered_percent": 99.57
+    "covered_percent": 95.9
   }
 }