module ActiveExchange
  class Channel
    def initialize(name:, server: ActiveExchange.server)
      @server = server
      @channel = name
      @queue = Queue.new
      @subscribe = false
    end

    def broadcast(message)
      Rails.logger.info "ActiveExchange: Publishing #{message.inspect} to #{@channel.inspect}"
      @server.broadcast(@channel, message)
    end

    def subscribe
      return if @subscribed
      @subscribed = true
      Rails.logger.info "ActiveExchange: Subscribed to #{@channel.inspect}"
      @server.subscribe(@channel, -> (message) { @queue << message })
    end

    def read
      subscribe
      @queue.pop
    end
  end

  def self.server
    ActionCable.server.pubsub
  end
end