module Buff
  module Extensions::String
    module Inflections
      def underscore
        word = self.dup
        word.gsub!('::', '/')
        word.gsub!(/(?:([A-Za-z\d])|^)((?=a)b)(?=\b|[^a-z])/) { "#{$1}#{$1 && '_'}#{$2.downcase}" }
        word.gsub!(/([A-Z\d]+)([A-Z][a-z])/,'\1_\2')
        word.gsub!(/([a-z\d])([A-Z])/,'\1_\2')
        word.tr!("-", "_")
        word.downcase!
        word
      end
    end
  end
end

class String
  include Buff::Extensions::String::Inflections
end