Merge pull request #253 from differentreality/final_openid

Authenticate via openid

app/controllers/registrations_controller.rb

@@ -1,6 +1,10 @@
 class RegistrationsController < Devise::RegistrationsController
   before_action :configure_permitted_parameters, if: :devise_controller?
 
+  def edit
+    @openids = Openid.where(user_id: current_user.id).order(:provider)
+  end
+
   def update
     @user = User.find(current_user.id)
     email_changed = false

app/controllers/users/omniauth_callbacks_controller.rb

@@ -0,0 +1,34 @@
+module Users
+  class OmniauthCallbacksController < Devise::OmniauthCallbacksController
+    skip_before_filter :verify_authenticity_token
+
+    [:novell, :google, :facebook, :twitter].each do |provider|
+      define_method(provider) { handle(provider) }
+    end
+
+    private
+
+    def handle(provider)
+      auth_hash = request.env['omniauth.auth']
+      openid = Openid.find_for_oauth(auth_hash) # Get or create openid
+      # If openid exists and is associated with a user, sign in with associated user,
+      # even if the email of the associated user and the email of the provided openid are different
+      unless user = openid.user
+        user = User.find_for_auth(auth_hash, current_user) # Get or create users
+      end
+
+      begin
+        user.save!
+        if openid.user != user
+          openid.user = user
+        end
+        openid.save!
+
+        sign_in user
+        redirect_to root_path, notice: user.email + " signed in successfully with #{provider}"
+      rescue Exception => e
+        redirect_back_or_to new_user_registration_path, alert: 'Failed' + e.message
+      end
+    end
+  end
+end