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1 import datetime |
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2 import time |
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3 |
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4 from django.utils.tzinfo import LocalTimezone |
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5 from django.utils.translation import ungettext, ugettext |
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6 |
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7 def timesince(d, now=None): |
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8 """ |
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9 Takes two datetime objects and returns the time between d and now |
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10 as a nicely formatted string, e.g. "10 minutes". If d occurs after now, |
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11 then "0 minutes" is returned. |
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12 |
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13 Units used are years, months, weeks, days, hours, and minutes. |
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14 Seconds and microseconds are ignored. Up to two adjacent units will be |
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15 displayed. For example, "2 weeks, 3 days" and "1 year, 3 months" are |
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16 possible outputs, but "2 weeks, 3 hours" and "1 year, 5 days" are not. |
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17 |
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18 Adapted from http://blog.natbat.co.uk/archive/2003/Jun/14/time_since |
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19 """ |
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20 chunks = ( |
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21 (60 * 60 * 24 * 365, lambda n: ungettext('year', 'years', n)), |
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22 (60 * 60 * 24 * 30, lambda n: ungettext('month', 'months', n)), |
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23 (60 * 60 * 24 * 7, lambda n : ungettext('week', 'weeks', n)), |
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24 (60 * 60 * 24, lambda n : ungettext('day', 'days', n)), |
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25 (60 * 60, lambda n: ungettext('hour', 'hours', n)), |
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26 (60, lambda n: ungettext('minute', 'minutes', n)) |
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27 ) |
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28 # Convert datetime.date to datetime.datetime for comparison. |
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29 if not isinstance(d, datetime.datetime): |
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30 d = datetime.datetime(d.year, d.month, d.day) |
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31 if now and not isinstance(now, datetime.datetime): |
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32 now = datetime.datetime(now.year, now.month, now.day) |
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33 |
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34 if not now: |
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35 if d.tzinfo: |
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36 now = datetime.datetime.now(LocalTimezone(d)) |
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37 else: |
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38 now = datetime.datetime.now() |
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39 |
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40 # ignore microsecond part of 'd' since we removed it from 'now' |
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41 delta = now - (d - datetime.timedelta(0, 0, d.microsecond)) |
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42 since = delta.days * 24 * 60 * 60 + delta.seconds |
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43 if since <= 0: |
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44 # d is in the future compared to now, stop processing. |
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45 return u'0 ' + ugettext('minutes') |
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46 for i, (seconds, name) in enumerate(chunks): |
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47 count = since // seconds |
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48 if count != 0: |
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49 break |
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50 s = ugettext('%(number)d %(type)s') % {'number': count, 'type': name(count)} |
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51 if i + 1 < len(chunks): |
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52 # Now get the second item |
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53 seconds2, name2 = chunks[i + 1] |
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54 count2 = (since - (seconds * count)) // seconds2 |
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55 if count2 != 0: |
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56 s += ugettext(', %(number)d %(type)s') % {'number': count2, 'type': name2(count2)} |
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57 return s |
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58 |
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59 def timeuntil(d, now=None): |
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60 """ |
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61 Like timesince, but returns a string measuring the time until |
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62 the given time. |
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63 """ |
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64 if not now: |
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65 if getattr(d, 'tzinfo', None): |
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66 now = datetime.datetime.now(LocalTimezone(d)) |
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67 else: |
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68 now = datetime.datetime.now() |
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69 return timesince(now, d) |