telnet-spotter.py

#!/usr/bin/env python

import os
import re
import sys

from telnetlib import Telnet

from env_tools import apply_env

apply_env()

HAMALERT_LOGIN = os.getenv("HAMALERT_LOGIN")
HAMALERT_PASSWORD = os.getenv("HAMALERT_PASSWORD")

if not HAMALERT_LOGIN or not HAMALERT_PASSWORD:
    print("HAMALERT_LOGIN and HAMALERT_PASSWORD are required")
    sys.exit(1)

RE_OPTIONS = (
    # DX de K9LC:      14074.0  VC9FEMBOY    -11dB                          0302Z
    re.compile(
        rb"DX de (?P<reporter>\w+):\s+(?P<frequency>[0-9.]+)\s+(?P<call>[A-Z0-9]+)\s+(?P<signal>[-+0-9]+dB)\s+(?P<time>\d+Z)"
    ),
)

with Telnet("hamalert.org", 7300) as hamalert:
    hamalert.read_until(b"login: ")
    hamalert.write(HAMALERT_LOGIN.encode("ascii") + b"\n")

    hamalert.read_until(b"password: ")
    hamalert.write(HAMALERT_PASSWORD.encode("ascii") + b"\n")

    while True:
        index, match, data = hamalert.expect(RE_OPTIONS)

        if index == 0 and match:
            print(
                "\t".join(
                    (
                        match.group("call").decode("ascii"),
                        match.group("frequency").decode("ascii"),
                        match.group("time").decode("ascii"),
                        match.group("signal").decode("ascii"),
                        match.group("reporter").decode("ascii"),
                    )
                )
            )
        else:
            print(index, match, data)