module Pakyow

  # Utility methods for strings.
  class StringUtils

    # Creates an underscored, lowercase version of a string.
    # This was borrowed from another library, probably ActiveSupport.
    def self.underscore(string)
      string.gsub(/::/, '/').
        gsub(/([A-Z]+)([A-Z][a-z])/,'\1_\2').
        gsub(/([a-z\d])([A-Z])/,'\1_\2').
        tr("-", "_").
        downcase
    end

    # split . seperated string at the last .
    def self.split_at_last_dot(s)
      split_index = s.rindex('.')
      return s,nil unless split_index
      left = s[0,split_index]
      right = s[split_index+1,s.length-(split_index+1)]
      return left,right
    end

    def self.remove_route_vars(route_spec)
      return unless route_spec
      arr = route_spec.split('/')
      new_arr = []
      arr.each {|e| new_arr << e unless e[0,1] == ':'}
      ret = new_arr.join('/')
      return '/' if ret == ''
      return ret
    end


  end
end