String#parameterize with preserve_case

activesupport_inflector_parameterize_with_preserve_case.rb

ActiveSupport::Inflector.module_eval do

  def parameterize(string, sep = '-', preserve_case: false)
    # Overridden to allow for preserving the case with the preserve_case: true option
    #  Based on https://github.com/rails/rails/blob/5ea3f284a4d07f5572f7ae2a7442cca8761fa8fc/activesupport/lib/active_support/inflector/transliterate.rb#L81

    # Replace accented chars with their ascii equivalents
    parameterized_string = transliterate(string)

    # Turn unwanted chars into the separator
    parameterized_string.gsub!(/[^a-z0-9\-_]+/i, sep)

    unless sep.nil? || sep.empty?
      re_sep = Regexp.escape(sep)
      # No more than one of the separator in a row.
      parameterized_string.gsub!(/#{re_sep}{2,}/, sep)
      # Remove leading/trailing separator.
      parameterized_string.gsub!(/^#{re_sep}|#{re_sep}$/i, '')
    end

    parameterized_string.downcase! unless preserve_case

    parameterized_string
  end

end

string_parameterize_with_preserve_case.rb

String.class_eval do

  def parameterize(sep = '-', **options)
    # Overridden to allow for passing options to the ActiveSupport inflector
    #  Based on https://github.com/rails/rails/blob/7a8fb281d8563668991be55a64388c3e8b96249c/activesupport/lib/active_support/core_ext/string/inflections.rb#L167
    ActiveSupport::Inflector.parameterize(self, sep, **options)
  end

end