# Author::    Nicolas Despres  <nicolas.despres@gmail.com>.
# Copyright:: Copyright (c) 2004, 2005 TTK team. All rights reserved.
# License::   LGPL
# $Id: severity.rb 567 2005-04-13 08:00:06Z polrop $


module TTK

  class Logger

    module Severity

      @@lower = DEBUG = 0
      INFO = 1
      WARN = 2
      ERROR = 3
      FATAL = 4
      @@higher = UNKNOWN = 5

      @@labels = %w(DEBUG INFO WARN ERROR FATAL UNKNOWN)

      module_function

      def lower
        @@lower
      end

      def higher
        @@higher
      end

      def unshift(*levels)
        levels.each do |l|
          @@lower -= 1
          const_set(l, @@lower)
          @@labels.unshift(l)
        end
      end

      def push(*levels)
        levels.each do |l|
          @@higher += 1
          const_set(l, @@higher)
          @@labels.push(l)
        end
      end

      def label(level)
        @@labels[level]
      end

      def labels
        @@labels
      end

    end # module Severity

  end # class Logger

end # module TTK