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80 lines
2.8 KiB
Python
80 lines
2.8 KiB
Python
# BSD 2-Clause License
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#
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# Apprise - Push Notification Library.
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# Copyright (c) 2026, Chris Caron <lead2gold@gmail.com>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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import contextlib
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from datetime import timezone as _tz
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from typing import Optional
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from zoneinfo import ZoneInfo, ZoneInfoNotFoundError
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from ..logger import logger
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def zoneinfo(name: str) -> Optional[ZoneInfo]:
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"""
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More forgiving ZoneInfo instantiation
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- Accepts lower/upper case
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- Normalises common UTC variants
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"""
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if not isinstance(name, str):
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return None
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raw = name.strip()
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if not raw:
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return None
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# Windows-safe: accept UTC family even without tzdata
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if raw.lower() in {
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"utc", "z", "gmt", "etc/utc", "etc/gmt", "gmt0", "utc0"}:
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return _tz.utc
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# Try exact match first
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try:
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return ZoneInfo(name)
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except ZoneInfoNotFoundError:
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pass
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# Try case-insensitive match across available keys
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from zoneinfo import available_timezones
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lowered = name.lower().strip()
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for zone in available_timezones():
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full_zone = zone.lower()
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if full_zone == lowered:
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return ZoneInfo(zone)
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with contextlib.suppress(IndexError):
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# Break our zones and enforce limit
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zones = full_zone.split("/")[1:3]
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# Possible we'll throw an index error here and that's okay
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location = zones[-1] if len(zones) == 1 else "/".join(zones)
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if location and location == lowered:
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return ZoneInfo(zone)
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logger.warning("Unknown timezone specified: %s", name)
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return None
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