from ics import Calendar
import requests
import logger

def grab_calendar(ics_url: str):
    response = requests.get(ics_url)

    if response.status_code != 200:
        logger.warning("Unable to fetch calendar")
        return None

    try:
        calendar = Calendar(response.content.decode("utf-8"))
    except Exception:
        logger.warning("Unable to parse calendar")
        return None

    return calendar