#236 OmniAuth Part 2

protected

# This is necessary since Rails 3.0.4
# See https://github.com/intridea/omniauth/issues/185
# and http://www.arailsdemo.com/posts/44
def handle_unverified_request
  true
end

bundle update
rails g controller registrations
rails g devise:views

gem 'mongrel', '1.2.0.pre2'

require 'openid/store/filesystem'
Rails.application.config.middleware.use OmniAuth::Builder do
  provider :twitter, 'CONSUMER_KEY', 'CONSUMER_SECRET'
  provider :open_id, OpenID::Store::Filesystem.new('/tmp')
end

def create
  omniauth = request.env["omniauth.auth"]
  authentication = Authentication.find_by_provider_and_uid(omniauth['provider'], omniauth['uid'])
  if authentication
    flash[:notice] = "Signed in successfully."
    sign_in_and_redirect(:user, authentication.user)
  elsif current_user
    current_user.authentications.create!(:provider => omniauth['provider'], :uid => omniauth['uid'])
    flash[:notice] = "Authentication successful."
    redirect_to authentications_url
  else
    user = User.new
    user.apply_omniauth(omniauth)
    if user.save
      flash[:notice] = "Signed in successfully."
      sign_in_and_redirect(:user, user)
    else
      session[:omniauth] = omniauth.except('extra')
      redirect_to new_user_registration_url
    end
  end
end

def apply_omniauth(omniauth)
  self.email = omniauth['user_info']['email'] if email.blank?
  authentications.build(:provider => omniauth['provider'], :uid => omniauth['uid'])
end

def password_required?
  (authentications.empty? || !password.blank?) && super
end

devise_for :users, :controllers => {:registrations => 'registrations'}

class RegistrationsController < Devise::RegistrationsController
  def create
    super
    session[:omniauth] = nil unless @user.new_record?
  end
  
  private
  
  def build_resource(*args)
    super
    if session[:omniauth]
      @user.apply_omniauth(session[:omniauth])
      @user.valid?
    end
  end
end

def provider_name
  if provider == 'open_id'
    "OpenID"
  else
    provider.titleize
  end
end