Module: Exposure::Callbacks::ClassMethods

Defined in:
lib/exposure/behaviors/callbacks.rb

Instance Method Summary collapse

Instance Method Details

#after(trigger, *actions) ⇒ Object

access point for creating and configuring after_ callbacks.



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# File 'lib/exposure/behaviors/callbacks.rb', line 18

def after(trigger, *actions)
  options = actions.extract_options!
  actions.each do |action|
    build_callback('after', trigger, action, options)
  end
end

#before(trigger, *actions) ⇒ Object

access point for creating and configuring before_ callbacks.



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# File 'lib/exposure/behaviors/callbacks.rb', line 10

def before(trigger, *actions)
  options = actions.extract_options!
  actions.each do |action|
    build_callback('before', trigger, action, options)
  end
end

#build_callback(prefix, trigger, action, options) ⇒ Object

builds callbacks that adhere to the ActiveSupport::Callbacks interface



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# File 'lib/exposure/behaviors/callbacks.rb', line 26

def build_callback(prefix, trigger, action, options) #:nodoc:
  callback_name = "#{prefix}_#{trigger}"
  
  if options[:on]
    callback_name += "_on_#{options.delete(:on)}"
  end
  
  options[:if] ||= []
  
  only_methods = Array.wrap(options.delete(:only))
  except_methods = Array.wrap(options.delete(:except))
  
  if only_methods.any?
    options[:if] << proc {|c| only_methods.include?(c.action_name.intern) }
  end
  
  if except_methods.any?
    options[:if] << proc {|c| !except_methods.include?(c.action_name.intern) }
  end
  
  self.send(callback_name, action, options)
end