adding facebook login functionality

Gemfile

@@ -10,6 +10,7 @@ gem 'rails'
 gem 'pg'
 gem 'devise'
 gem 'omniauth'
+gem 'omniauth-facebook'
 gem "has_mailbox"
 gem 'fastercsv' # Only required on Ruby 1.8 and below
 gem 'rails_admin', :git => 'git://github.com/sferik/rails_admin.git'

Gemfile.lock

@@ -102,6 +102,8 @@ GEM
     erubis (2.7.0)
     execjs (1.2.13)
       multi_json (~> 1.0)
+    faraday (0.9.0)
+      multipart-post (>= 1.2, < 3)
     fastercsv (1.5.4)
     haml (3.1.4)
     has_mailbox (1.5.5)
@@ -111,11 +113,14 @@ GEM
     highline (1.6.9)
     hike (1.2.1)
     hpricot (0.8.5)
+    httpauth (0.2.1)
     i18n (0.6.0)
     jquery-rails (1.0.19)
       railties (~> 3.0)
       thor (~> 0.14)
     json (1.4.6)
+    jwt (0.1.6)
+      multi_json (>= 1.0)
     kaminari (0.13.0)
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
@@ -131,9 +136,21 @@ GEM
       polyamorous (~> 0.5.0)
     mime-types (1.17.2)
     multi_json (1.0.4)
+    multipart-post (2.0.0)
+    oauth2 (0.8.1)
+      faraday (~> 0.8)
+      httpauth (~> 0.1)
+      jwt (~> 0.1.4)
+      multi_json (~> 1.0)
+      rack (~> 1.2)
     omniauth (1.0.1)
       hashie (~> 1.2)
       rack
+    omniauth-facebook (1.6.0)
+      omniauth-oauth2 (~> 1.1)
+    omniauth-oauth2 (1.1.1)
+      oauth2 (~> 0.8.0)
+      omniauth (~> 1.0)
     orm_adapter (0.0.5)
     pg (0.12.2)
     polyamorous (0.5.0)
@@ -223,6 +240,7 @@ DEPENDENCIES
   meta_search
   metropoli!
   omniauth
+  omniauth-facebook
   paperclip!
   pg
   rails

app/models/user.rb

@@ -2,7 +2,7 @@ class User < ActiveRecord::Base
   # Include default devise modules. Others available are:
   # :token_authenticatable, :encryptable, :confirmable, :lockable, :timeoutable and :omniauthable
   devise :database_authenticatable, :registerable,
-         :recoverable, :rememberable, :trackable, :validatable
+         :recoverable, :rememberable, :trackable, :validatable, :omniauthable
 
   has_mailbox
 
@@ -22,6 +22,26 @@ class User < ActiveRecord::Base
   def role?(role)
     !!self.roles.find_by_name(role.to_s)
   end
+
+  def self.new_with_session(params, session)
+    super.tap do |user|
+      if data = session["devise.facebook_data"] && session["devise.facebook_data"]["extra"]["raw_info"]
+        user.email = data["email"]
+      end
+    end
+  end
+
+# Setting facebook log in functionality
+  def self.find_for_facebook_oauth(access_token, signed_in_resource=nil)
+    data = access_token.extra.raw_info
+    if user = User.where(:email => data.email).first
+      user
+    else
+      # Create a user with a stub password.
+      user = User.create!(:username => data.username ? data.username : data.nickname , :email => data.email, :password => Devise.friendly_token[0,20])
+    end
+  end
+
 end
 # == Schema Information
 #

app/views/layouts/application.html.erb

@@ -51,6 +51,14 @@
           <ul class="nav">
             <li><a href="#about">Descubre <span>Otros perfiles</span></a></li>
           </ul>
+          <div id="user-widget">
+            <% if current_user %>
+              Welcome <%= current_user.username %> !
+              <%= link_to('Sign Out', destroy_user_session_path, :method=>'delete') %>
+            <% else %>
+              <%= link_to "Sign in with Facebook", "users/auth/facebook", id: "sign_in" %>
+            <% end %>
+          </div>
           <ul class="sub-nav">
             <ul class="nav">
               <% if user_signed_in? %>
@@ -59,18 +67,14 @@
                 </li>
               <% else %>
                 <li>
-                  <%= link_to('Login', new_user_session_path)  %>
+                  <%= link_to('Login', new_user_registration_path)  %>
                 </li>
               <% end %>
 
               <% if user_signed_in? && !current_user.profile.nil? %>
                 <li>
                   <%= link_to('Tu cuenta', my_profile_path(:id => current_user.profile.id)) %>
                 </li>
-              <% else %>
-                <li>
-                  <%= link_to('Regístrate', new_user_registration_path)  %>
-                </li>
               <% end %>
             </ul>
           </ul>

config/initializers/devise.rb

@@ -192,6 +192,8 @@
 
   # The default HTTP method used to sign out a resource. Default is :delete.
   config.sign_out_via = :delete
+  require "omniauth-facebook"
+  config.omniauth :facebook, "1432521453659398", "62efcda6545e20dbb80a2a381fc259f3"
 
   # ==> OmniAuth
   # Add a new OmniAuth provider. Check the wiki for more information on setting

config/routes.rb

@@ -7,6 +7,8 @@
   metropoli_for :cities, :states, :countries
   resources :coworker_requests
   resources :profiles
+  #Adding routes facebook auth
+  devise_for :users, :controllers => { :omniauth_callbacks => "users/omniauth_callbacks" }
   # Override devise default routes for login, logout and signup
   devise_for :users do
     get '/login'   => "devise/sessions#new",       :as => :new_user_session