Method: OpenC3::TemplateProtocol#write_packet

Defined in:

lib/openc3/interfaces/protocols/template_protocol.rb

#write_packet(packet) ⇒ Object

# File 'lib/openc3/interfaces/protocols/template_protocol.rb', line 182

def write_packet(packet)
  # Make sure we are past the initial data dropping period
  if @initial_read_delay and @initial_read_delay_needed and @connect_complete_time and Time.now < @connect_complete_time
    delay_needed = @connect_complete_time - Time.now
    sleep(delay_needed) if delay_needed > 0
  end

  # First grab the response template and response packet (if there is one)
  begin
    @response_template = packet.read("RSP_TEMPLATE").strip
    @response_packet = packet.read("RSP_PACKET").strip
    @response_target_name = packet.target_name
    # If the template or packet are empty set them to nil. This allows for
    # the user to remove the RSP_TEMPLATE and RSP_PACKET values and avoid
    # any response timeouts
    if @response_template.empty? || @response_packet.empty?
      @response_template = nil
      @response_packet = nil
      @response_target_name = nil
    end
  rescue
    # If there is no response template we set to nil
    @response_template = nil
    @response_packet = nil
    @response_target_name = nil
  end

  # Grab the command template because that is all we eventually send
  @template = packet.read("CMD_TEMPLATE")
  # Create a new packet to populate with the template
  raw_packet = Packet.new(nil, nil)
  raw_packet.buffer = @template
  raw_packet = super(raw_packet)
  return raw_packet if Symbol === raw_packet

  data = raw_packet.buffer(false)
  # Scan the template for variables in brackets <VARIABLE>
  # Read these values from the packet and substitute them in the template
  # and in the @response_packet name
  @template.scan(/<(.*?)>/).each do |variable|
    value = packet.read(variable[0], :RAW).to_s
    data.gsub!("<#{variable[0]}>", value)
    @response_packet.gsub!("<#{variable[0]}>", value) if @response_packet
  end

  return raw_packet
end