module Log::SubjectName
  def self.included(cls)
    cls.extend Determine
  end

  def subject_name
    @subject_name ||= self.class.subject_name(subject)
  end

  module Determine
    def subject_name(subject)
      if subject.is_a?(Class) || subject.is_a?(Module)
        name = subject.name
      elsif subject.is_a? String
        name = subject
      elsif subject.is_a? Symbol
        name = subject.to_s
      else
        name = subject.class.name
      end
      name
    end
  end
end