module Middleman::Util::UriTemplates

def safe_parameterize(str)
  sep = '-'
  # Reimplementation of http://api.rubyonrails.org/classes/ActiveSupport/Inflector.html#method-i-parameterize that preserves un-transliterate-able multibyte chars.
  parameterized_string = ::ActiveSupport::Inflector.transliterate(str.to_s).downcase
  parameterized_string.gsub!(/[^a-z0-9\-_\?]+/, sep)
  parameterized_string.chars.to_a.each_with_index do |char, i|
    next unless char == '?' && str[i].bytes.count != 1
    parameterized_string[i] = str[i]
  end
  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}$/, '')
  parameterized_string
end