Module: Wamp::Client::Event::ClassMethods

Defined in:
lib/wamp/client/event.rb

Instance Method Summary collapse

Instance Method Details

#create_event(events, attribute: nil, setter: nil, trigger: nil) ⇒ Object 



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# File 'lib/wamp/client/event.rb', line 38

def create_event(events, attribute: nil, setter: nil, trigger: nil)
  attribute ||= :event
  setter ||= :on
  trigger ||= :trigger

  # Create the attributes
  callback_name = "#{attribute}_callbacks"
  event_list_name = "#{attribute}_list"

  # Creates the attribute to store the callbacks
  attr_accessor callback_name

  # Creates the attributes to store the allowed events
  define_method event_list_name do
    events
  end

  # Creates the setter.  Default: "on"
  define_method setter do |event, &handler|
    unless self.send(event_list_name).include?(event)
      raise RuntimeError, "unknown #{setter}(event) '#{event}'"
    end

    callback = self.send(callback_name) || {}
    callback[event] = handler
    self.send("#{callback_name}=", callback)
  end

  # Create the trigger.  Default: "trigger"
  define_method trigger do |event, *args|
    handler = (self.send(callback_name) || {})[event]
    if handler != nil
      handler.call(*args)
    end
  end
end