module Pakyow
  module Utils

    # Utility methods for strings.
    class String

      # 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

      def self.parse_path_from_caller(caller)
        caller.match(/^(.+)(:?:\d+(:?:in `.+')?$)/)[1]
      end

      def self.normalize_path(path)
        return path if path.is_a?(Regexp)

        path = path[1, path.length - 1] if path[0, 1] == '/'
        path = path[0, path.length - 1] if path[path.length - 1, 1] == '/'
        path
      end

    end

  end
end