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import datetime, math, time
from django.utils.tzinfo import LocalTimezone
def timesince(d, now=None):
"""
Takes a datetime object, returns the time between then and now
as a nicely formatted string, e.g "10 minutes"
Adapted from http://blog.natbat.co.uk/archive/2003/Jun/14/time_since
"""
chunks = (
(60 * 60 * 24 * 365, 'year'),
(60 * 60 * 24 * 30, 'month'),
(60 * 60 * 24, 'day'),
(60 * 60, 'hour'),
(60, 'minute')
)
if now:
t = time.mktime(now)
else:
t = time.localtime()
if d.tzinfo:
tz = LocalTimezone()
else:
tz = None
now = datetime.datetime(t[0], t[1], t[2], t[3], t[4], t[5], tzinfo=tz)
delta = now - d
since = delta.days * 24 * 60 * 60 + delta.seconds
# Crazy iteration syntax because we need i to be current index
for i, (seconds, name) in zip(range(len(chunks)), chunks):
count = math.floor(since / seconds)
if count != 0:
break
if count == 1:
s = '1 %s' % name
else:
s = '%d %ss' % (count, name)
if i + 1 < len(chunks):
# Now get the second item
seconds2, name2 = chunks[i + 1]
count2 = math.floor((since - (seconds * count)) / seconds2)
if count2 != 0:
if count2 == 1:
s += ', 1 %s' % name2
else:
s += ', %d %ss' % (count2, name2)
return s
def timeuntil(d):
"""
Like timesince, but returns a string measuring the time until
the given time.
"""
now = datetime.datetime.now()
return timesince(now, time.mktime(d.timetuple()))
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