class BSON::Timestamp

def self.from_bson(buffer, **options)
  increment = buffer.get_uint32
  seconds = buffer.get_uint32
  new(seconds, increment)
end

def <=>(other)
  raise ArgumentError.new(COMPARISON_ERROR_MESSAGE % other.class) unless other.is_a?(Timestamp)
  return 0 if self == other
  a = [ seconds, increment ]
  b = [ other.seconds, other.increment ]
  [ a, b ].sort[0] == a ? -1 : 1
end

def ==(other)
  return false unless other.is_a?(Timestamp)
  seconds == other.seconds && increment == other.increment
end

def as_extended_json(**options)
  { "$timestamp" => { "t" => seconds, "i" => increment } }
end

def as_json(*args)
  as_extended_json
end

def initialize(seconds, increment)
  @seconds, @increment = seconds, increment
end

def to_bson(buffer = ByteBuffer.new)
  buffer.put_uint32(increment)
  buffer.put_uint32(seconds)
end