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# frozen_string_literal: true
module Cucumber
module Core
class Event
# Macro to generate new subclasses of {Event} with attribute readers.
def self.new(*events)
# Use normal constructor for subclasses of Event
return super if ancestors.index(Event).positive?
Class.new(Event) do
# NB: We need to use metaprogramming here instead of direct variable obtainment
# because JRuby does not guarantee the order in which variables are defined is equivalent
# to the order in which they are obtainable
#
# See https://github.com/jruby/jruby/issues/7988 for more info
attr_reader(*events)
define_method(:initialize) do |*attributes|
events.zip(attributes) do |name, value|
instance_variable_set(:"@#{name}", value)
end
end
define_method(:attributes) do
events.map { |var| instance_variable_get(:"@#{var}") }
end
define_method(:to_h) do
events.zip(attributes).to_h
end
def event_id
self.class.event_id
end
end
end
class << self
# @return [Symbol] the underscored name of the class to be used as the key in an event registry
def event_id
underscore(name.split('::').last).to_sym
end
private
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
end
end
end
end
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