complete solution(Shabbir Saifee)

source/Gemfile

@@ -38,4 +38,3 @@ gem 'spring',        group: :development
 # Use debugger
 # gem 'debugger', group: [:development, :test]
  gem 'rspec-rails', group: [:development, :test]
-

source/Gemfile.lock

@@ -28,33 +28,35 @@ GEM
       thread_safe (~> 0.1)
       tzinfo (~> 1.1)
     arel (5.0.1.20140414130214)
-    builder (3.2.2)
+    builder (3.2.3)
     coffee-rails (4.0.1)
       coffee-script (>= 2.2.0)
       railties (>= 4.0.0, < 5.0)
-    coffee-script (2.3.0)
+    coffee-script (2.4.1)
       coffee-script-source
       execjs
-    coffee-script-source (1.8.0)
-    diff-lcs (1.2.5)
+    coffee-script-source (1.12.2)
+    concurrent-ruby (1.0.5)
+    diff-lcs (1.3)
     erubis (2.7.0)
-    execjs (2.2.1)
+    execjs (2.7.0)
     hike (1.2.3)
-    i18n (0.6.11)
-    jbuilder (2.2.2)
-      activesupport (>= 3.0.0, < 5)
-      multi_json (~> 1.2)
-    jquery-rails (3.1.2)
+    i18n (0.9.5)
+      concurrent-ruby (~> 1.0)
+    jbuilder (2.6.4)
+      activesupport (>= 3.0.0)
+      multi_json (>= 1.2)
+    jquery-rails (3.1.4)
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)
-    json (1.8.1)
-    mail (2.6.1)
-      mime-types (>= 1.16, < 3)
-    mime-types (2.4.1)
-    minitest (5.4.2)
-    multi_json (1.10.1)
-    rack (1.5.2)
-    rack-test (0.6.2)
+    json (1.8.6)
+    mail (2.7.0)
+      mini_mime (>= 0.1.1)
+    mini_mime (1.0.0)
+    minitest (5.11.3)
+    multi_json (1.13.1)
+    rack (1.5.5)
+    rack-test (0.6.3)
       rack (>= 1.0)
     rails (4.1.6)
       actionmailer (= 4.1.6)
@@ -71,55 +73,55 @@ GEM
       activesupport (= 4.1.6)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
-    rake (10.3.2)
-    rdoc (4.1.2)
-      json (~> 1.4)
-    rspec-core (3.1.6)
-      rspec-support (~> 3.1.0)
-    rspec-expectations (3.1.2)
+    rake (12.3.0)
+    rdoc (4.3.0)
+    rspec-core (3.7.1)
+      rspec-support (~> 3.7.0)
+    rspec-expectations (3.7.0)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.1.0)
-    rspec-mocks (3.1.3)
-      rspec-support (~> 3.1.0)
-    rspec-rails (3.1.0)
+      rspec-support (~> 3.7.0)
+    rspec-mocks (3.7.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.7.0)
+    rspec-rails (3.7.2)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       railties (>= 3.0)
-      rspec-core (~> 3.1.0)
-      rspec-expectations (~> 3.1.0)
-      rspec-mocks (~> 3.1.0)
-      rspec-support (~> 3.1.0)
-    rspec-support (3.1.2)
+      rspec-core (~> 3.7.0)
+      rspec-expectations (~> 3.7.0)
+      rspec-mocks (~> 3.7.0)
+      rspec-support (~> 3.7.0)
+    rspec-support (3.7.1)
     sass (3.2.19)
-    sass-rails (4.0.3)
+    sass-rails (4.0.5)
       railties (>= 4.0.0, < 5.0)
-      sass (~> 3.2.0)
-      sprockets (~> 2.8, <= 2.11.0)
+      sass (~> 3.2.2)
+      sprockets (~> 2.8, < 3.0)
       sprockets-rails (~> 2.0)
-    sdoc (0.4.1)
+    sdoc (0.4.2)
       json (~> 1.7, >= 1.7.7)
       rdoc (~> 4.0)
-    spring (1.1.3)
-    sprockets (2.11.0)
+    spring (1.7.2)
+    sprockets (2.12.4)
       hike (~> 1.2)
       multi_json (~> 1.0)
       rack (~> 1.0)
       tilt (~> 1.1, != 1.3.0)
-    sprockets-rails (2.2.0)
+    sprockets-rails (2.3.3)
       actionpack (>= 3.0)
       activesupport (>= 3.0)
       sprockets (>= 2.8, < 4.0)
-    sqlite3 (1.3.9)
-    thor (0.19.1)
-    thread_safe (0.3.4)
+    sqlite3 (1.3.13)
+    thor (0.20.0)
+    thread_safe (0.3.6)
     tilt (1.4.1)
-    turbolinks (2.4.0)
-      coffee-rails
-    tzinfo (1.2.2)
+    turbolinks (5.1.0)
+      turbolinks-source (~> 5.1)
+    turbolinks-source (5.1.0)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
-    uglifier (2.5.3)
-      execjs (>= 0.3.0)
-      json (>= 1.8.0)
+    uglifier (4.1.6)
+      execjs (>= 0.3.0, < 3)
 
 PLATFORMS
   ruby
@@ -136,3 +138,6 @@ DEPENDENCIES
   sqlite3
   turbolinks
   uglifier (>= 1.3.0)
+
+BUNDLED WITH
+   1.16.1

source/app/controllers/urls_controller.rb

@@ -1,2 +1,57 @@
 class UrlsController < ApplicationController
+
+  #GET    /urls
+  def index
+    @urls = Url.all
+  end
+
+  #GET    /urls/new
+  def new
+    @url = Url.new
+  end
+  #GET    /urls/:id
+  def show
+    @url = Url.find(params[:id])
+  end
+
+  # POST   /urls
+  def create
+    puts "inside create"
+    @url = Url.new(url_params)
+    if @url.save
+      redirect_to url_path(@url)
+    else
+      render 'new'
+    end
+  end
+
+  #DELETE /urls/:id
+  def destroy
+    @url =Url.find(params[:id])
+    if @url.destroy
+      redirect_to urls_path
+    else
+
+    end
+  end
+
+  #GET /:short_url
+  def hit_short_url
+    puts "inside hit_url"
+    url = Url.find_by short_url:  params[:short_url]
+    if url
+      url.update('click_count' => url.click_count + 1)
+      redirect_to url.original_url
+    else
+      redirect_to root_path
+    end
+
+  end
+
+  private
+  def url_params
+    params.require(:url).permit(:original_url)
+  end
+
+
 end

source/app/models/url.rb

@@ -0,0 +1,31 @@
+require 'uri'
+class Url < ActiveRecord:: Base
+
+  CHARSET = (('a'..'z').to_a + ('A'..'Z').to_a + ('0'..'9').to_a)
+  validates :original_url, presence: true
+  validate :url_valid?
+  #before_save :shorten_url, :on => :create
+  before_create :shorten_url
+
+  private def url_valid?
+    begin
+      error.add(:original_url, " is invalid!") unless
+      URI.parse(original_url).kind_of?(URI::HTTP) || URI.parse(original_url).kind_of?(URI::HTTPS)
+    rescue
+      errors.add(:original_url, " is invalid! (must start with 'http' or 'https')")
+    end
+end
+
+  private def shorten_url
+    puts "inside shotern method"
+    self.short_url = create_short_url
+  end
+
+  private def create_short_url
+    tiny_url =""
+    6.times do
+      tiny_url << CHARSET.sample
+    end
+    tiny_url
+  end
+end

source/app/views/layouts/application.html.erb

@@ -5,10 +5,30 @@
   <%= stylesheet_link_tag    'application', media: 'all', 'data-turbolinks-track' => true %>
   <%= javascript_include_tag 'application', 'data-turbolinks-track' => true %>
   <%= csrf_meta_tags %>
+  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" >
+  <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" ></script>
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" ></script>
+  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" ></script>
+
 </head>
 <body>
+  <header class="navbar  navbar-inverse">
+    <div class="navbar-class">
+      <div class="container">
+        <ul class="nav navbar-nav">
+          <li><%= link_to "home", urls_path%></li>
+          <li><%=link_to "shorten url", new_url_path %></li>
+        </ul>
+
+
+      </div>
+    </div>
+  </header>
+
+<div class="container-fluid">
+  <%= yield %>
+</div>
 
-<%= yield %>
 
 </body>
 </html>

source/app/views/urls/index.html.erb

@@ -0,0 +1,23 @@
+<h1>
+Listing all the urls
+</h1>
+
+<p> <%= link_to "Shorten Url", new_url_path %>
+</p>
+
+<table >
+  <tr>
+    <td> <strong> Original Url </strong> </td>
+    <td> <strong> Shortened Url </strong> </td>
+    <td> <strong>Total Clicks</strong> </td>
+  </tr>
+  <% @urls.each do |url| %>
+  <tr>
+    <td>  <a href="<%=url.original_url %>" ><%=url.original_url %></a></td>
+    <td>  <a href="http://localhost:3000/<%=url.short_url%>"><%=url.short_url%> </a></td>
+    <td><%= url.click_count %></td>
+    <td><%= link_to 'Delete', url_path(url), method: :delete,data: {confirm: "Are you sure?"} %></td>
+  </tr>
+
+  <% end %>
+</table>

source/app/views/urls/new.html.erb

@@ -0,0 +1,23 @@
+<h1>Shorten a new url on this page</h1>
+
+<!-- -->
+
+<%if @url.errors.any?%>
+  <h2> Correct the following errors</h2>
+  <ul>
+    <% @url.errors.full_messages.each do |msg| %>
+      <li class="text-danger">
+        <%= msg %>
+      </li>
+    <%end %>
+  </ul>
+
+<% end %>
+
+<%= form_for @url do |f| %>
+  <p>
+    <%= f.label "Enter Url" %></br>
+    <%= f.text_field :original_url, class: "form-control" %>
+    <%=f.submit class: "btn btn-success", value: "Shorten" %>
+  </p>
+<% end %>

source/app/views/urls/show.html.erb

@@ -0,0 +1,8 @@
+<h1>showing selected url</h1>
+
+<p>
+  Original URL: <%= @url.original_url%>
+</p>
+<p>
+Shortened Url: <%= @url.short_url%>
+</p>

source/config/routes.rb

@@ -1,56 +1,6 @@
 Rails.application.routes.draw do
-  # The priority is based upon order of creation: first created -> highest priority.
-  # See how all your routes lay out with "rake routes".
 
-  # You can have the root of your site routed with "root"
-  # root 'welcome#index'
-
-  # Example of regular route:
-  #   get 'products/:id' => 'catalog#view'
-
-  # Example of named route that can be invoked with purchase_url(id: product.id)
-  #   get 'products/:id/purchase' => 'catalog#purchase', as: :purchase
-
-  # Example resource route (maps HTTP verbs to controller actions automatically):
-  #   resources :products
-
-  # Example resource route with options:
-  #   resources :products do
-  #     member do
-  #       get 'short'
-  #       post 'toggle'
-  #     end
-  #
-  #     collection do
-  #       get 'sold'
-  #     end
-  #   end
-
-  # Example resource route with sub-resources:
-  #   resources :products do
-  #     resources :comments, :sales
-  #     resource :seller
-  #   end
-
-  # Example resource route with more complex sub-resources:
-  #   resources :products do
-  #     resources :comments
-  #     resources :sales do
-  #       get 'recent', on: :collection
-  #     end
-  #   end
-
-  # Example resource route with concerns:
-  #   concern :toggleable do
-  #     post 'toggle'
-  #   end
-  #   resources :posts, concerns: :toggleable
-  #   resources :photos, concerns: :toggleable
-
-  # Example resource route within a namespace:
-  #   namespace :admin do
-  #     # Directs /admin/products/* to Admin::ProductsController
-  #     # (app/controllers/admin/products_controller.rb)
-  #     resources :products
-  #   end
+  resources :urls
+  root 'urls#index'
+  get '/:short_url', to: 'urls#hit_short_url'
 end