module Messaging
  class ExpectedVersion
    Error = Class.new(StandardError)

    attr_reader :version

    def initialize(version)
      @version = version
    end

    def any?
      version == :any
    end

    def none?
      version == :none || version == -1
    end

    def matches?(other_version)
      return true if any?
      return true if none? && other_version == -1
      return true if version == other_version
      false
    end

    def match!(other_version)
      return true if matches?(other_version)
      raise Error, "expected: #{version} actual: #{other_version}"
    end
  end
end