Scrap mujkaktus.cz and send news to a Telegram channel

happykaktus.py

#!/usr/bin/env python3

import lxml.html
import urllib.request
from pathlib import Path

import requests

telegram_bot_token = "FIXME"
telegram_group_name = "@kvetinac"


def send_telegram_message(message):
    url = "https://api.telegram.org/bot{}/sendMessage".format(telegram_bot_token)
    payload = {
        "chat_id":telegram_group_name,
        "text": message,
        "parse_mode": "HTML",
    }
    r = requests.post(url, data=payload).json()
    if not r["ok"]:
        print(r)
        raise RuntimeError("Telegram error")


def get_last_newsitem():
    url = "https://www.mujkaktus.cz/homepage"
    doc = lxml.html.parse(urllib.request.urlopen(url))
    news = doc.find('//div[@class="journal-content-article"]/div[@class="article ico ico-news-default"]')
    news.remove(news[-1]) # Odstraň poslední odstavec
    return news


def save_last_newsitem(news):
    p = Path(__file__).parents[0] / "lastitem.html"
    p.write_text(lxml.html.tostring(news, encoding="unicode"))


def load_saved_newsitem():
    p = Path(__file__).parents[0] / "lastitem.html"
    return lxml.html.fragment_fromstring(p.read_text())

def render_html(news):
    return "<b>{}</b>\n{}".format(news[0].text_content(), "".join(n.text_content().strip() for n in news[1:]))


def main():
    try:
        news = get_last_newsitem()
    except ConnectionResetError:
        return
    try:
        saved = load_saved_newsitem()
        if saved.text_content().strip() == news.text_content().strip():
            return
    except FileNotFoundError:
        pass
    send_telegram_message(render_html(news))
    save_last_newsitem(news)


if __name__ == '__main__':
    main()