saturnflyer/surrounded

module Surrounded
  module Context
    module Forwarding
      def forward_trigger(receiver, message, alternate = message)
        raise(ArgumentError, %(you may not forward '%{m}`) % {m: message}) if ["__id__", "__send__"].include?(message.to_s)
        trigger alternate do |*args, **kwargs, &block|
          send(receiver).public_send(message, *args, **kwargs, &block)
        end
      end

      def forward_triggers(receiver, *messages)
        messages.each do |message|
          forward_trigger(receiver, message)
        end
      end

      def forwarding(hash)
        hash.each { |messages, receiver|
          forward_triggers(receiver, *messages)
        }
      end

      alias_method :forward, :forward_trigger
      alias_method :forwards, :forward_triggers
    end
  end
end