# Copyright (C) 2019-2020  The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information


import hashlib
from typing import Any, Dict, Tuple

TOKEN_BEGIN = -(2 ** 63)
"""Minimum value returned by the CQL function token()"""
TOKEN_END = 2 ** 63 - 1
"""Maximum value returned by the CQL function token()"""


def hash_url(url: str) -> bytes:
    return hashlib.sha1(url.encode("ascii")).digest()


def remove_keys(d: Dict[str, Any], keys: Tuple[str, ...]) -> Dict[str, Any]:
    return {k: v for (k, v) in d.items() if k not in keys}