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7f074142bf
* Replace pycrpytodome with cryptocraphy * Fix typing * fix typing * Fix lints * Fix build * Add musl libc * Fix lint * fix lint * Fix algo * Add more typing fix crypto imports v2 * Fix padding
64 lines
2.0 KiB
Python
64 lines
2.0 KiB
Python
"""Tools file for Hass.io."""
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from datetime import datetime, timedelta, timezone, tzinfo
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import logging
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import re
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from typing import Any, Dict, Optional
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import pytz
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UTC = pytz.utc
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_LOGGER = logging.getLogger(__name__)
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# Copyright (c) Django Software Foundation and individual contributors.
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# All rights reserved.
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# https://github.com/django/django/blob/master/LICENSE
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DATETIME_RE = re.compile(
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r"(?P<year>\d{4})-(?P<month>\d{1,2})-(?P<day>\d{1,2})"
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r"[T ](?P<hour>\d{1,2}):(?P<minute>\d{1,2})"
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r"(?::(?P<second>\d{1,2})(?:\.(?P<microsecond>\d{1,6})\d{0,6})?)?"
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r"(?P<tzinfo>Z|[+-]\d{2}(?::?\d{2})?)?$"
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)
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# Copyright (c) Django Software Foundation and individual contributors.
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# All rights reserved.
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# https://github.com/django/django/blob/master/LICENSE
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def parse_datetime(dt_str):
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"""Parse a string and return a datetime.datetime.
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This function supports time zone offsets. When the input contains one,
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the output uses a timezone with a fixed offset from UTC.
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Raises ValueError if the input is well formatted but not a valid datetime.
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Returns None if the input isn't well formatted.
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"""
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match = DATETIME_RE.match(dt_str)
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if not match:
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return None
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kws: Dict[str, Any] = match.groupdict()
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if kws["microsecond"]:
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kws["microsecond"] = kws["microsecond"].ljust(6, "0")
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tzinfo_str = kws.pop("tzinfo")
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tzinfo_val: Optional[tzinfo] = None
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if tzinfo_str == "Z":
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tzinfo_val = UTC
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elif tzinfo_str is not None:
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offset_mins = int(tzinfo_str[-2:]) if len(tzinfo_str) > 3 else 0
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offset_hours = int(tzinfo_str[1:3])
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offset = timedelta(hours=offset_hours, minutes=offset_mins)
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if tzinfo_str[0] == "-":
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offset = -offset
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tzinfo_val = timezone(offset)
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else:
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tzinfo_val = None
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kws = {k: int(v) for k, v in kws.items() if v is not None}
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kws["tzinfo"] = tzinfo_val
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return datetime(**kws)
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def utcnow():
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"""Return the current timestamp including timezone."""
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return datetime.now(UTC)
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