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92 lines
3.1 KiB
Python
92 lines
3.1 KiB
Python
5 years ago
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import calendar
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import datetime
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from django.utils.html import avoid_wrapping
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from django.utils.timezone import is_aware, utc
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from django.utils.translation import gettext, ngettext_lazy
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TIME_STRINGS = {
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'year': ngettext_lazy('%d year', '%d years'),
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'month': ngettext_lazy('%d month', '%d months'),
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'week': ngettext_lazy('%d week', '%d weeks'),
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'day': ngettext_lazy('%d day', '%d days'),
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'hour': ngettext_lazy('%d hour', '%d hours'),
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'minute': ngettext_lazy('%d minute', '%d minutes'),
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}
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TIMESINCE_CHUNKS = (
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(60 * 60 * 24 * 365, 'year'),
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(60 * 60 * 24 * 30, 'month'),
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(60 * 60 * 24 * 7, 'week'),
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(60 * 60 * 24, 'day'),
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(60 * 60, 'hour'),
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(60, 'minute'),
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)
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def timesince(d, now=None, reversed=False, time_strings=None):
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"""
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Take two datetime objects and return the time between d and now as a nicely
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formatted string, e.g. "10 minutes". If d occurs after now, return
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"0 minutes".
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Units used are years, months, weeks, days, hours, and minutes.
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Seconds and microseconds are ignored. Up to two adjacent units will be
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displayed. For example, "2 weeks, 3 days" and "1 year, 3 months" are
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possible outputs, but "2 weeks, 3 hours" and "1 year, 5 days" are not.
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`time_strings` is an optional dict of strings to replace the default
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TIME_STRINGS dict.
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Adapted from
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https://web.archive.org/web/20060617175230/http://blog.natbat.co.uk/archive/2003/Jun/14/time_since
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"""
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if time_strings is None:
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time_strings = TIME_STRINGS
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# Convert datetime.date to datetime.datetime for comparison.
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if not isinstance(d, datetime.datetime):
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d = datetime.datetime(d.year, d.month, d.day)
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if now and not isinstance(now, datetime.datetime):
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now = datetime.datetime(now.year, now.month, now.day)
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now = now or datetime.datetime.now(utc if is_aware(d) else None)
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if reversed:
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d, now = now, d
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delta = now - d
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# Deal with leapyears by subtracing the number of leapdays
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leapdays = calendar.leapdays(d.year, now.year)
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if leapdays != 0:
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if calendar.isleap(d.year):
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leapdays -= 1
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elif calendar.isleap(now.year):
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leapdays += 1
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delta -= datetime.timedelta(leapdays)
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# ignore microseconds
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since = delta.days * 24 * 60 * 60 + delta.seconds
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if since <= 0:
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# d is in the future compared to now, stop processing.
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return avoid_wrapping(gettext('0 minutes'))
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for i, (seconds, name) in enumerate(TIMESINCE_CHUNKS):
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count = since // seconds
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if count != 0:
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break
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result = avoid_wrapping(time_strings[name] % count)
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if i + 1 < len(TIMESINCE_CHUNKS):
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# Now get the second item
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seconds2, name2 = TIMESINCE_CHUNKS[i + 1]
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count2 = (since - (seconds * count)) // seconds2
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if count2 != 0:
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result += gettext(', ') + avoid_wrapping(time_strings[name2] % count2)
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return result
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def timeuntil(d, now=None, time_strings=None):
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"""
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Like timesince, but return a string measuring the time until the given time.
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"""
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return timesince(d, now, reversed=True, time_strings=time_strings)
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