ActionCable User Identified

cable_example.rb

# https://github.com/rails/rails/issues/30917#issuecomment-337895075
# Common connection class
# app/channels/application_cable/connection.rb
module ApplicationCable
  class Connection < ActionCable::Connection::Base
    identified_by :current_user

    def connect
      self.current_user = find_verified_user
    end

    protected

    def find_verified_user
      return User.find_by(id: cookies.signed['user.id'])
    end
  end
end
# Channel for authenticated user
# app/channels/user_notification_channel.rb
class UserNotificationChannel < ApplicationCable::Channel
  def subscribed
    reject and return if current_user.blank?
    stream_for current_user
  end

  def unsubscribed
  end
end
# Channel for anonymous user
# app/channels/chat_channel.rb
class ChatChannel < ApplicationCable::Channel
  def subscribed
    @connection_token = SecureRandom.hex(36)
    stream_from "chat_channel_#{@connection_token}"
  end

  def unsubscribed
  end
end
# It works, but it's probably not the best solution. Moving the user identification to the UserNotificationChannel is not possible due to the absence of cookies in ApplicationCable::Channel.
# Any hint for a cleaner and more performant pattern is much appreciated.