require "set" module ActionCable module Connection module Identification extend ActiveSupport::Concern included do class_attribute :identifiers, default: Set.new end class_methods do # Mark a key as being a connection identifier index that can then be used to find the specific connection again later. # Common identifiers are current_user and current_account, but could be anything, really. # # Note that anything marked as an identifier will automatically create a delegate by the same name on any # channel instances created off the connection. def identified_by(*identifiers) Array(identifiers).each { |identifier| attr_accessor identifier } self.identifiers += identifiers end end # Return a single connection identifier that combines the value of all the registered identifiers into a single gid. def connection_identifier unless defined? @connection_identifier @connection_identifier = connection_gid identifiers.map { |id| instance_variable_get("@#{id}") }.compact end @connection_identifier end private def connection_gid(ids) ids.map do |o| if o.respond_to? :to_gid_param o.to_gid_param else o.to_s end end.sort.join(":") end end end end