Implemented Users with authentication via OmniAuth/Twitter

Gemfile

@@ -3,6 +3,7 @@ source 'http://rubygems.org'
 gem 'rails', '3.0.6'
 gem 'sqlite3'
 gem 'haml'
+gem 'omniauth'
 
 group :development, :test do
   gem 'rspec-rails'

Gemfile.lock

@@ -29,6 +29,7 @@ GEM
       activemodel (= 3.0.6)
       activesupport (= 3.0.6)
     activesupport (3.0.6)
+    addressable (2.2.4)
     arel (2.0.9)
     autotest (4.4.6)
       ZenTest (>= 4.4.1)
@@ -50,6 +51,10 @@ GEM
     diff-lcs (1.1.2)
     erubis (2.6.6)
       abstract (>= 1.0.0)
+    faraday (0.6.1)
+      addressable (~> 2.2.4)
+      multipart-post (~> 1.1.0)
+      rack (>= 1.1.0, < 2)
     ffi (1.0.7)
       rake (>= 0.8.7)
     haml (3.0.25)
@@ -72,12 +77,56 @@ GEM
       treetop (~> 1.4.8)
     mime-types (1.16)
     mocha (0.9.12)
+    multi_json (0.0.5)
+    multipart-post (1.1.0)
+    net-ldap (0.1.1)
     nifty-generators (0.4.6)
     nokogiri (1.4.4)
+    oa-basic (0.2.4)
+      oa-core (= 0.2.4)
+      rest-client (~> 1.6.0)
+    oa-core (0.2.4)
+    oa-enterprise (0.2.4)
+      addressable (= 2.2.4)
+      net-ldap (~> 0.1.1)
+      nokogiri (~> 1.4.2)
+      oa-core (= 0.2.4)
+      pyu-ruby-sasl (~> 0.0.3.1)
+      rubyntlm (~> 0.1.1)
+    oa-more (0.2.4)
+      multi_json (~> 0.0.2)
+      oa-core (= 0.2.4)
+      rest-client (~> 1.6.0)
+    oa-oauth (0.2.4)
+      faraday (~> 0.6.1)
+      multi_json (>= 0.0.5)
+      nokogiri (~> 1.4.2)
+      oa-core (= 0.2.4)
+      oauth (~> 0.4.0)
+      oauth2 (~> 0.4.1)
+    oa-openid (0.2.4)
+      oa-core (= 0.2.4)
+      rack-openid (~> 1.2.0)
+      ruby-openid-apps-discovery
+    oauth (0.4.4)
+    oauth2 (0.4.1)
+      faraday (~> 0.6.1)
+      multi_json (>= 0.0.5)
+    omniauth (0.2.4)
+      oa-basic (= 0.2.4)
+      oa-core (= 0.2.4)
+      oa-enterprise (= 0.2.4)
+      oa-more (= 0.2.4)
+      oa-oauth (= 0.2.4)
+      oa-openid (= 0.2.4)
     polyglot (0.3.1)
+    pyu-ruby-sasl (0.0.3.2)
     rack (1.2.2)
     rack-mount (0.6.14)
       rack (>= 1.0.0)
+    rack-openid (1.2.0)
+      rack (>= 1.1.0)
+      ruby-openid (>= 2.1.8)
     rack-test (0.5.7)
       rack (>= 1.0)
     rails (3.0.6)
@@ -109,6 +158,10 @@ GEM
       activesupport (~> 3.0)
       railties (~> 3.0)
       rspec (~> 2.5.0)
+    ruby-openid (2.1.8)
+    ruby-openid-apps-discovery (1.2.0)
+      ruby-openid (>= 2.1.7)
+    rubyntlm (0.1.1)
     rubyzip (0.9.4)
     selenium-webdriver (0.1.4)
       childprocess (>= 0.1.7)
@@ -137,6 +190,7 @@ DEPENDENCIES
   jquery-rails
   mocha
   nifty-generators
+  omniauth
   rails (= 3.0.6)
   rspec-rails
   sqlite3

app/controllers/application_controller.rb

@@ -1,9 +1,15 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery
+  helper_method :current_user  
 
   def find_resource
     class_name = params[:controller].singularize
     klass = class_name.camelize.constantize
     self.instance_variable_set "@" + class_name, klass.find(params[:id])
   end
+
+private
+  def current_user
+    @current_user ||= User.find(session[:user_id]) if session[:user_id]
+  end
 end

app/controllers/sessions_controller.rb

@@ -0,0 +1,12 @@
+class SessionsController < ApplicationController
+  def create
+    user = User.find_or_create_by_auth(request.env["omniauth.auth"])
+    session[:user_id] = user.id
+    redirect_to root_path, :notice => "Logged in as #{current_user.name}"
+  end
+
+  def destroy
+    session[:user_id] = nil
+    redirect_to root_path, :notice => "Goodbye!"    
+  end
+end

app/helpers/sessions_helper.rb

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

app/models/company.rb

@@ -2,4 +2,8 @@ class Company < ActiveRecord::Base
   attr_accessible :name
   validates_presence_of :name  
   include Contact
+
+  def to_s
+    name
+  end
 end

app/models/user.rb

@@ -0,0 +1,11 @@
+class User < ActiveRecord::Base
+
+  def self.find_or_create_by_auth(auth_data)
+    user = self.find_or_create_by_provider_and_uid(auth_data["provider"], auth_data["uid"])
+    if user.name != auth_data["user_info"]["name"]
+      user.name = auth_data["user_info"]["name"]
+      user.save
+    end    
+    return user
+  end
+end

app/views/layouts/application.html.erb

@@ -14,6 +14,14 @@
           <%= content_tag :div, msg, :id => "flash_#{name}" %>
         </div>
       <% end %>
+      <div id='account'>
+        <% if current_user %>
+          <span>Welcome, <%= current_user.name %></span>
+          <%= link_to "logout", logout_path, :id => "login" %>
+        <% else %>
+          <%= link_to "login", login_path, :id => "logout" %>
+        <% end %>
+      </div>
       <%= content_tag :h1, yield(:title) if show_title? %>
       <%= yield %>
     </div>

config/initializers/omniauth.rb

@@ -0,0 +1,3 @@
+Rails.application.config.middleware.use OmniAuth::Builder do
+  provider :twitter, "EZYxQSqP0j35QWqoV0kUg", "IToKT8jdWZEhEH60wFL94HGf4uoGE1SqFUrZUR34M4"
+end

config/routes.rb

@@ -1,66 +1,7 @@
 JSContact::Application.routes.draw do
-  resources :companies
-
-  resources :email_addresses
-
-  resources :phone_numbers
-
-  resources :people
-
-  # The priority is based upon order of creation:
-  # first created -> highest priority.
-
-  # Sample of regular route:
-  #   match 'products/:id' => 'catalog#view'
-  # Keep in mind you can assign values other than :controller and :action
-
-  # Sample of named route:
-  #   match 'products/:id/purchase' => 'catalog#purchase', :as => :purchase
-  # This route can be invoked with purchase_url(:id => product.id)
-
-  # Sample resource route (maps HTTP verbs to controller actions automatically):
-  #   resources :products
-
-  # Sample resource route with options:
-  #   resources :products do
-  #     member do
-  #       get 'short'
-  #       post 'toggle'
-  #     end
-  #
-  #     collection do
-  #       get 'sold'
-  #     end
-  #   end
-
-  # Sample resource route with sub-resources:
-  #   resources :products do
-  #     resources :comments, :sales
-  #     resource :seller
-  #   end
-
-  # Sample resource route with more complex sub-resources
-  #   resources :products do
-  #     resources :comments
-  #     resources :sales do
-  #       get 'recent', :on => :collection
-  #     end
-  #   end
-
-  # Sample resource route within a namespace:
-  #   namespace :admin do
-  #     # Directs /admin/products/* to Admin::ProductsController
-  #     # (app/controllers/admin/products_controller.rb)
-  #     resources :products
-  #   end
-
-  # You can have the root of your site routed with "root"
-  # just remember to delete public/index.html.
-  # root :to => "welcome#index"
-
-  # See how all your routes lay out with "rake routes"
-
-  # This is a legacy wild controller route that's not recommended for RESTful applications.
-  # Note: This route will make all actions in every controller accessible via GET requests.
-  # match ':controller(/:action(/:id(.:format)))'
+  resources :companies, :email_addresses, :phone_numbers, :people  
+  match '/auth/:provider/callback', :to => 'sessions#create'
+  match "/login" => redirect("/auth/twitter"), :as => :login
+  match "/logout" => "sessions#destroy", :as => :logout
+  root :to => "companies#index"
 end

db/migrate/20110424163240_create_users.rb

@@ -0,0 +1,15 @@
+class CreateUsers < ActiveRecord::Migration
+  def self.up
+    create_table :users do |t|
+      t.string :provider
+      t.string :uid
+      t.string :name
+
+      t.timestamps
+    end
+  end
+
+  def self.down
+    drop_table :users
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20110420161636) do
+ActiveRecord::Schema.define(:version => 20110424163240) do
 
   create_table "companies", :force => true do |t|
     t.string   "name"
@@ -41,4 +41,12 @@
     t.string   "contact_type"
   end
 
+  create_table "users", :force => true do |t|
+    t.string   "provider"
+    t.string   "uid"
+    t.string   "name"
+    t.datetime "created_at"
+    t.datetime "updated_at"
+  end
+
 end