class Rodauth::Feature

def self.define(name, constant=nil, &block)
  feature = new
  feature.dependencies = []
  feature.routes = []
  feature.feature_name = name
  configuration = feature.configuration = FeatureConfiguration.new
  feature.module_eval(&block)
  configuration.def_configuration_methods(feature)
  if constant
    Rodauth.const_set(constant, feature)
    Rodauth::FeatureConfiguration.const_set(constant, configuration)
  end
  FEATURES[name] = feature
end