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57 lines
1.3 KiB
Python
57 lines
1.3 KiB
Python
#!/usr/bin/env python3
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"""Custom input type parser."""
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import datetime
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import environs
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from dateutil import tz
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from pytimeparse import timeparse
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env = environs.Env()
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def timedelta_validator(value):
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"""Return the :class:`datetime.datetime.DateTime` for a time in the past.
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:param value: a string containing a time format supported by
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mod:`pytimeparse`
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"""
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if value is None:
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return None
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try:
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_datetime_seconds_ago(timeparse.timeparse(value))
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return value
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except TypeError:
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raise
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def timedelta(value, dt_format=None):
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"""Return the :class:`datetime.datetime.DateTime` for a time in the past.
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:param value: a string containing a time format supported by
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mod:`pytimeparse`
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"""
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if value is None:
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return None
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timedelta = _datetime_seconds_ago(timeparse.timeparse(value))
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if dt_format:
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timedelta = timedelta.strftime(dt_format)
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return timedelta
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def _datetime_seconds_ago(seconds):
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now = datetime.datetime.now(tz.tzutc())
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return now - datetime.timedelta(seconds=seconds)
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@env.parser_for("timedelta_validator")
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def timedelta_parser(value):
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try:
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timedelta_validator(value)
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return value
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except TypeError as e:
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raise environs.EnvError(e)
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