53 lines
1.5 KiB
Python
53 lines
1.5 KiB
Python
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import math
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import os
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import re
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from datetime import datetime, timezone
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def parse_datetime(value):
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"""Returns an aware datetime in local timezone"""
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# In Python < 3.7, `%z` does not match `Z` offset
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# https://docs.python.org/3.7/library/datetime.html#strftime-and-strptime-behavior
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if value.endswith("Z"):
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dttm = datetime.strptime(value, "%Y-%m-%dT%H:%M:%S.%fZ").replace(tzinfo=timezone.utc)
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else:
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dttm = datetime.strptime(value, "%Y-%m-%dT%H:%M:%S.%f%z")
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# When running tests return datetime in UTC so that tests don't depend on
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# the local timezone
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if "PYTEST_CURRENT_TEST" in os.environ:
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return dttm.astimezone(timezone.utc)
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return dttm.astimezone()
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SECOND = 1
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MINUTE = SECOND * 60
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HOUR = MINUTE * 60
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DAY = HOUR * 24
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WEEK = DAY * 7
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def time_ago(value: datetime) -> str:
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now = datetime.now().astimezone()
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delta = now.timestamp() - value.timestamp()
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if delta < 1:
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return "now"
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if delta < 8 * DAY:
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if delta < MINUTE:
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return f"{math.floor(delta / SECOND)}".rjust(2, " ") + "s"
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if delta < HOUR:
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return f"{math.floor(delta / MINUTE)}".rjust(2, " ") + "m"
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if delta < DAY:
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return f"{math.floor(delta / HOUR)}".rjust(2, " ") + "h"
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return f"{math.floor(delta / DAY)}".rjust(2, " ") + "d"
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if delta < 53 * WEEK: # not exactly correct but good enough as a boundary
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return f"{math.floor(delta / WEEK)}".rjust(2, " ") + "w"
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return ">1y"
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