Omniauth + Omniauthfacebook

für

Gemfile

@@ -53,6 +53,8 @@ gem "paper_trail" , '>=2.7.0'
 
 # User management
 gem "devise" ,'~>2.2.3'
+gem "omniauth"
+gem "omniauth-facebook"
 
 # Roles for users
 gem "rolify"

Gemfile.lock

@@ -67,6 +67,8 @@ GEM
     factory_girl_rails (4.2.1)
       factory_girl (~> 4.2.0)
       railties (>= 3.0.0)
+    faraday (0.8.8)
+      multipart-post (~> 1.2.0)
     formtastic (2.2.1)
       actionpack (>= 3.0)
     formtastic-bootstrap (2.0.0)
@@ -79,7 +81,9 @@ GEM
       paper_trail (~> 2)
     haml (4.0.0)
       tilt
+    hashie (2.0.5)
     hike (1.2.1)
+    httpauth (0.2.0)
     i18n (0.6.1)
     journey (1.0.4)
     jquery-fileupload-rails (0.4.1)
@@ -89,6 +93,8 @@ GEM
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)
     json (1.7.7)
+    jwt (0.1.8)
+      multi_json (>= 1.5)
     libv8 (3.11.8.13)
     mail (2.4.4)
       i18n (>= 0.4.0)
@@ -96,6 +102,21 @@ GEM
       treetop (~> 1.4.8)
     mime-types (1.21)
     multi_json (1.5.1)
+    multipart-post (1.2.0)
+    oauth2 (0.8.1)
+      faraday (~> 0.8)
+      httpauth (~> 0.1)
+      jwt (~> 0.1.4)
+      multi_json (~> 1.0)
+      rack (~> 1.2)
+    omniauth (1.1.4)
+      hashie (>= 1.2, < 3)
+      rack
+    omniauth-facebook (1.4.1)
+      omniauth-oauth2 (~> 1.1.0)
+    omniauth-oauth2 (1.1.1)
+      oauth2 (~> 0.8.0)
+      omniauth (~> 1.0)
     orm_adapter (0.4.0)
     paper_trail (2.7.0)
       activerecord (~> 3.0)
@@ -199,6 +220,8 @@ DEPENDENCIES
   haml
   jquery-fileupload-rails
   jquery-rails
+  omniauth
+  omniauth-facebook
   paper_trail (>= 2.7.0)
   paperclip (~> 3.4.0)
   rails (= 3.2.9)

app/controllers/users/omniauth_callbacks_controller.rb

@@ -0,0 +1,15 @@
+
+class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
+  def facebook
+    # You need to implement the method below in your model (e.g. app/models/user.rb)
+    @user = User.find_for_facebook_oauth(request.env["omniauth.auth"], current_user)
+
+    if @user.persisted?
+      sign_in_and_redirect @user, :event => :authentication #this will throw if @user is not activated
+      set_flash_message(:notice, :success, :kind => "Facebook") if is_navigational_format?
+    else
+      session["devise.facebook_data"] = request.env["omniauth.auth"]
+      redirect_to new_user_registration_url
+    end
+  end
+end

app/models/user.rb

@@ -30,10 +30,29 @@ class User < ActiveRecord::Base
   # :token_authenticatable, :confirmable,
   # :lockable, :timeoutable and :omniauthable
   devise :database_authenticatable, :registerable,:confirmable,
-         :recoverable, :rememberable, :trackable, :validatable
+         :recoverable, :rememberable, :trackable, :validatable,:omniauthable, :omniauth_providers => [:facebook]
 
   # Setup accessible (or protected) attributes for your model
-  attr_accessible :email, :password, :password_confirmation, :remember_me
+  attr_accessible :email, :password, :password_confirmation, :remember_me, :provider, :uid, :name
   # attr_accessible :title, :body
+	def self.find_for_facebook_oauth(auth, signed_in_resource=nil)
+		user = User.where(:provider => auth.provider, :uid => auth.uid).first
+		unless user
+			user = User.create(name:auth.extra.raw_info.name,
+                         provider:auth.provider,
+                         uid:auth.uid,
+                         email:auth.info.email,
+                         password:Devise.friendly_token[0,20]
+                         )
+		end
+		user
+	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"] if user.email.blank?
+      end
+    end
+  end
   
 end

config/initializers/omniauth.rb

@@ -0,0 +1 @@
+

db/migrate/20130825095438_add_columns_to_users.rb

@@ -0,0 +1,7 @@
+class AddColumnsToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :provider, :string
+    add_column :users, :uid, :string
+    add_column :users, :name, :string
+  end
+end