Tiktok Date Extractor

from datetime import datetime, timezone, timedelta

def get_vid_id(tiktok_url):
    # This regex should be safe as "Only letters, numbers, underscores, or periods are allowed" in TikTok usernames.
    import re
    regex = re.compile(r'(?<=\/video\/)(.*?)(?=$|[^0-9])')
    vid_id = regex.search(tiktok_url).group(0)
    return vid_id

def extract_unix_timestamp(vid_id):
    # BigInt needed as we need to treat vid_id as 64 bit decimal. This reduces browser support.
    as_binary = bin(int(vid_id))[2:]
    first_31_chars = as_binary[:31]
    timestamp = int(first_31_chars, 2)
    return timestamp

def unix_timestamp_to_brasilia_date(timestamp):
    date_object = datetime.utcfromtimestamp(timestamp)
    brasilia_timezone = timezone(timedelta(hours=-3))  # UTC-3 for Brasília
    brasilia_date_object = date_object.replace(tzinfo=timezone.utc).astimezone(brasilia_timezone)
    brasilia_date_format = brasilia_date_object.strftime('%a, %d %b %Y %H:%M:%S Brasília')
    return brasilia_date_format

def get_date():
    tiktok_url = input("Enter TikTok video URL: ")
    vid_id = get_vid_id(tiktok_url)
    unix_timestamp = extract_unix_timestamp(vid_id)
    brasilia_date_format = unix_timestamp_to_brasilia_date(unix_timestamp)
    print("Uploaded on:", brasilia_date_format)

if __name__ == "__main__":
    get_date()