source_paths << File.dirname(__FILE__)

gem 'oa-oauth', :require => 'omniauth/oauth'

initializer 'omniauth.rb', <<-FILE
Rails.application.config.middleware.use OmniAuth::Builder do
  provider :facebook, ENV['API_KEY'], ENV['APP_SECRET']
end
FILE

apply 'devise.rb'

rvm 'rails g model authentication user_id:integer provider:string uid:string'
route "match 'auth/:provider/callback' => 'authentications#create'"

data = <<-FILE
  has_many :authentications

  def apply_omniauth(omniauth)
    if email.blank?
      self.email = omniauth['user_info']['email'] ||
        omniauth['extra']['user_hash']['email']
    end

    if name.blank?
      self.name = omniauth['user_info']['first_name'] + ' ' +
        omniauth['user_info']['last_name']
    end

    authentications.build(
      :provider => omniauth['provider'],
      :uid      => omniauth['uid']
    )
  end

  def password_required?
    (authentications.empty? || !password.blank?) && super
  end
FILE
inject_into_file 'app/models/user.rb', data, :after => /attr_access.*\n/

data = <<-FILE
  belongs_to :user

  validates_presence_of :provider, :uid
FILE
inject_into_class 'app/models/authentication.rb', data, 'Authentication'
copy_file 'facebook/authentications_controller.rb',
  'app/controllers/authentications_controller.rb'