Twitter, Facebook Login in Rails

facebook_twitter_login.rb

  def facebook_log_in
    # Scenarios
    # If the user is signed in and has no facebook uid we link the accounts
    # If the user is not signed in we create an account for him.
    # that's it. he is logged in for life.
    
    if player_signed_in?
      if current_player['fb_uid'].nil?
        # Link accounts
        puts "linking accounts"
        graph = Koala::Facebook::API.new(@fb_user['access_token'])
        player_details = graph.get_object("me")
        
        Player.find(current_player['_id']).update_attributes({
          :fb_name => player_details['name'],
          :fb_uid => @fb_user['user_id'],
          :fb_token => @fb_user['access_token']
        })
      else
        # Do nothing. the user is logged in and he has facebook credentials.
        # This means a user with facebook connection will be logged in forever.
        # No matter what. muhahaha.
      end
    else
      # Parse Facebook cookies
      @fb_oauth = Koala::Facebook::OAuth.new('278614762170622', '941951e5795a34dd9d252cbb20569438')
      @fb_user = @fb_oauth.get_user_info_from_cookies(cookies)
      unless @fb_user.nil?
        # See if we already have the user in the system
        # this will never be called, since we get an access
        # token for life, so once the user is created
        # he is logged in forever.
        # Player.first(conditions: {fb_uid: @fb_user['user_id']}
        # else:
        
        # We create a new player
        puts "creating a new user"
        graph = Koala::Facebook::API.new(@fb_user['access_token'])
        player_details = graph.get_object("me")
        @player = Player.create!(
          :fb_name => player_details['name'],
          :fb_uid => @fb_user['user_id'],
          :fb_token => @fb_user['access_token']
        )
        
        flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Facebook"
        sign_in_and_redirect @player, :event => :authentication
      end
    end
  end


def twitter
    # Scenarios:
    # 1. Player is already signed in with his fb account:
    #    we link the accounts and update the information.
    # 2. Player is new: we create the account.
    # 3. Player is old: we update the player's information.
    # login with a safe write.
    twitter_details = {
      twitter_name: env["omniauth.auth"]['user_info']['name'], # Almog Melamed
      twitter_nick: env["omniauth.auth"]['user_info']['nickname'], # @radagaisus
      twitter_uid: env["omniauth.auth"]['uid'] # Twitter uid
    }
    
    if player_signed_in?
      @player = Player.find(current_player['_id']) 
    else
      @player = Player.first(conditions: {twitter_uid: env['omniauth.auth']['uid']})
    end
    
    if @player.nil?
      @player = Player.create!(twitter_details)
    else
      @player.update_attributes(twitter_details)
    end
    
    flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Twitter"
    sign_in_and_redirect @player, :event => :authentication
  end
  
  def failure
    puts "signing in using omniauth failed."
    flash[:notice] = I18n.t "devise.omniauth_callbacks.failure", :kind => "Twitter"
    redirect_to :root
  end

# Old Method using Server Side for Facebook
  def facebook
    @player = Player.where(fb_uid: env['omniauth.auth']['uid']).first
    
    if @player.nil?
      @player = Player.create! :fb_name => env["omniauth.auth"]['user_info']['name'],
        :fb_uid => env["omniauth.auth"]['uid'],
        :fb_token => env['omniauth.auth']['credentials']['token']
    end
    
    flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Facebook"
    sign_in_and_redirect @player, :event => :authentication
  end