message.rb

class Message

  attr_accessor :body

  def initialize
    @api_version = 1
    @api_format = 1
    @message_type = 1

    @source_id = 64071
    @destination_id = 64072

    @checksum = 1
  end

  def serialize 
    output = ""
    output << [@api_version].pack('c')
    output << [@api_format].pack('c')
    output << [@message_type].pack('c')
    output << [].pack('x')

    output << [@source_id].pack('n')
    output << [@destination_id].pack('n')

    output << [@body.length].pack('n')
    output << [].pack('x2')

    output << [].pack('x3')
    output << [@checksum].pack('c')

    output << @body
  end

  def deserialize(message)
    @api_version = message[0]
    @api_format = message[1]
    @message_type = message[2]

    @source_id = message[4..5].unpack('n')[0]
    @destination_id = message[6..7].unpack('n')[0]

    @message_length = message[8..9].unpack('n')[0]
    @checksum = message[15]

    @body = message[16..(@message_length + 15)]

    self
  end 



end