Sample code for WCR2012 lightning talk

application_controller.rb

class ApplicationController < ActionController::Base

  def current_user
    User.find_by_id(session[:user_id])
  end

  def current_user=(user)
    session[:user_id] = user.id
  end

  def logged_in?
    !!self.current_user
  end

  def require_login
    unless logged_in?
      redirect_to login_url and return false
    end
  end

end

authentication.rb

# app/controllers/concerns/authentication.rb
module Authentication

  def current_user
    User.find_by_id(session[:user_id])
  end

  def current_user=(user)
    session[:user_id] = user.id
  end

  def logged_in?
    !!self.current_user
  end

  # Any other methods you want, so long as they
  # pertain to authentication

end

class ApplicationController < ActionController::Base
  include Authentication

  # Where do I look for the authentication stuff?
  # In Authentication, of course!

end

duplication.rb

def foo
  # Does some stuff ...

  if @user.status == :active
    @user.status = :inactive
    @user.save!
  end
end

def bar
  # Does some other stuff ...

  if @user.status == :active
    @user.status = :inactive
    @user.save!
  end
end

def baz
  # Does yet other stuff ...

  if @user.status == :active
    @user.status = :inactive
    @user.save!
  end
end


def deactivate_user(user)
  if user.status == :active
    user.status = :inactive
    user.save!
  end
end

def foo
  # Does some stuff ...
  deactivate_user(@user)
end

def bar
  # Does some other stuff ...
  deactivate_user(@user)
end

def baz
  # Does yet other stuff ...
  deactivate_user(@user)
end

user.rb

class User < ActiveRecord::Base

  def adobe_profile
    AdobeId::Profile.new(self.adobe_profile_id)
  end

  def connected_to_adobe_profile?
    !self.adobe_profile_id.nil?
  end

  def connect_to_adobe_profile(profile_obj)
    self.adobe_profile_id = profile_obj.id
    self.email_unique = false
    save
  end

  def disconnect_adobe_profile
    self.adobe_profile_id = nil
    self.email_unique = true
    save
  end

end

user_adobe_profile.rb

module UserAdobeProfile

  def adobe_profile
    AdobeId::Profile.new(self.adobe_profile_id)
  end

  def connected_to_adobe_profile?
    !self.adobe_profile_id.nil?
  end

  # Anything else pertaining to users' Adobe profiles

end

class User < ActiveRecord::Base
  include UserAdobeProfile
end