#!/usr/bin/env python3
# -*- coding: utf-8 -*-

from urllib.request import urlopen
from urllib.error import URLError
import logging
import re
import time

coding = 'sjis'

def main():
    while True:
        check(server='vipper.2ch.net', ita='news4vip', titlePattern=re.compile('プログラミング'))
        time.sleep(60)

def check(server, ita, titlePattern):
    ''' 2chのスレッド一覧を取得し、スレタイがtitlePatternに一致するスレを見つけたらそのスレのURLを表示する '''
    subbackUrl = 'https://{}/{}/subback.html'.format(server, ita)
    threadUrl = 'http://{}/{}/test/read.cgi/{}'
    try:
        req = urlopen(subbackUrl)
        html = req.read().decode(coding, 'replace')
    except URLError:
        return 1

    ''' line = "<a href="スレッドID/l50">番号: スレタイ</a>" '''
    linePattern = re.compile('<a href="(?P<thread>[0-9]+)/l50">[0-9]+: (?P<title>.*)</a>')
    for line in html.splitlines():
        matchObj = linePattern.match(line)
        if not matchObj:
            continue
        threadId = matchObj.group('thread')
        title = matchObj.group('title')
        if titlePattern.search(title):
            print(threadUrl.format(server, ita, threadId))

if __name__ == '__main__':
    exit(main())