class Cucumber::Core::Event

def self.new(*attributes)
  # Use normal constructor for subclasses of Event
  return super if self.ancestors.index(Event) > 0
  Class.new(Event) do
    attr_reader(*attributes)
    define_method(:initialize) do |*args|
      attributes.zip(args) do |name, value|
        instance_variable_set "@#{name}".to_sym, value
      end
    end
    define_method(:attributes) do
      attributes.map { |attribute| self.send(attribute) }
    end
    define_method(:to_h) do
      attributes.reduce({}) { |result, attribute| 
        value = self.send(attribute)
        result[attribute] = value
        result
      }
    end
    define_method(:event_id) do
      self.class.event_id
    end
  end
end

def event_id
  underscore(self.name.split("::").last).to_sym
end

def underscore(string)
  string.to_s.gsub(/::/, '/').
  gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
  gsub(/([a-z\d])([A-Z])/,'\1_\2').
  tr("-", "_").
  downcase
end