module Eco
  module Data
    module Strings
      module SnakeCase
        # From ActiveSupport
        # @see https://api.rubyonrails.org/classes/ActiveSupport/Inflector.html#method-i-underscore
        def snake_case(camel_cased_word)
          return camel_cased_word.to_s.dup unless /[A-Z-]|::/.match?(camel_cased_word)
          word = camel_cased_word.to_s.gsub("::", "/")
          word.gsub!(/(?<=[A-Z])(?=[A-Z][a-z])|(?<=[a-z\d])(?=[A-Z])/, "_")
          word.tr!("-", "_")
          word.downcase!
          word
        end
      end
    end
  end
end