"""
Common libraries
"""

from json import loads as read_json
from urllib import request
from urllib.error import HTTPError


def get_data_from_json(url):
    """
    Gets data from json at url
    """

    opener = request.build_opener()
    try:
        return read_json(opener.open(url).read().decode("utf8"))
    except HTTPError:
        return None


def hms2seconds(hhmmss):
    """
    Convert H:M:S string to time in seconds
    """

    try:
        cut_string = hhmmss.split(":")
        cut_time = (int(cut_string[0]), int(cut_string[1]), int(cut_string[2]))
        return 3600 * cut_time[0] + 60 * cut_time[1] + cut_time[2]
    except (IndexError, ValueError, TypeError):
        return None