from msg_container import MsgContainer
from msg_sink import MsgSink
import re

class AsciiReceiver(MsgSink):
	def __init__(self, name: str, filter: str):
		super().__init__()
		self.name = name
		self.filter = filter

	def is_msg(self, msg: MsgContainer):
		res = False
		try:
			res = re.match(bytes(self.filter, encoding="utf-8"), msg.data) is not None
		except UnicodeDecodeError:
			pass
		return res

	def on_recv(self, msg: MsgContainer):
		print(f"{self.name}: {msg}")


class NmeaReceiver(AsciiReceiver):
	def __init__(self, name: str, tid: str, msg_type: str):
		if tid == "--":
			AsciiReceiver.__init__(self, name, filter=f"^\\$..{msg_type}.*")
		else:
			AsciiReceiver.__init__(self, name, filter=f"^\\${tid}{msg_type}.*")