# actor/filter.rb - actor message filters
#
# Copyright 2007-2008  MenTaLguY <mental@rydia.net>
#           2007-2011  Evan Phoenix <evan@fallingsnow.net>
#
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class Rubinius::Actor
  class Filter
    attr_reader :timeout
    attr_reader :timeout_action

    def initialize
      @pairs = []
      @timeout = nil
      @timeout_action = nil
    end

    def timeout?
      not @timeout.nil?
    end

    def when(pattern, &action)
      raise ArgumentError, "no block given" unless action
      @pairs.push [pattern, action]
      self
    end

    def after(seconds, &action)
      raise ArgumentError, "no block given" unless action

      seconds = seconds.to_f
      if !@timeout or seconds < @timeout
        @timeout = seconds
        @timeout_action = action
      end
      self
    end

    def action_for(value)
      pair = @pairs.find { |pattern, action| pattern === value }
      pair ? pair.last : nil
    end
  end
end
