23 lines
643 B
Python
23 lines
643 B
Python
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import re
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_ISO8601_DURATION_RE = re.compile(
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r"P(?:(?P<days>\d+)D)?"
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r"(?:T(?:(?P<hours>\d+)H)?(?:(?P<minutes>\d+)M)?(?:(?P<seconds>\d+)S)?)?"
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)
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def parse_iso8601_duration(value: str | None) -> int | None:
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if not value:
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return None
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match = _ISO8601_DURATION_RE.fullmatch(value)
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if not match:
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return None
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parts = match.groupdict()
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if not any(parts.values()):
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return None
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days = int(parts["days"] or 0)
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hours = int(parts["hours"] or 0)
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minutes = int(parts["minutes"] or 0)
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seconds = int(parts["seconds"] or 0)
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return days * 86400 + hours * 3600 + minutes * 60 + seconds
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