from msg.container import MsgContainer
from msg.talker import MsgTalker
from stream.listener import StreamListener
from struct import pack
import time

class NmeaPacketizer(StreamListener, MsgTalker):
	def __init__(self, name: str):
		StreamListener.__init__(self)
		MsgTalker.__init__(self)
		self.name = name
		self.packet = b''
		self.wait_sync = True

	def on_recv(self, rx_data: bytes):
		for d in rx_data:
			if d == 13 or d == 10:
				self.wait_sync = False
				if len(self.packet) > 0:
					self.call_listener(MsgContainer(self.name, time.time(), self.packet))
					self.wait_sync = True
					self.packet = b''
			elif not self.wait_sync:
				self.packet += pack('B', d)