root/galaxy-central/eggs/WebHelpers-0.2-py2.6.egg/webhelpers/rails/date.py

リビジョン 3, 2.8 KB (コミッタ: kohda, 14 年 前)

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1"""Date/Time Helpers"""
2# Last synced with Rails copy at Revision 4674 on Aug 19th, 2006.
3# Note that the select_ tags are purposely not ported as they're very totally useless
4# and inefficient beyond comprehension.
5
6from datetime import datetime
7import time
8
9DEFAULT_PREFIX = 'date'
10
11def distance_of_time_in_words(from_time, to_time=0, include_seconds=False):
12    """
13    Reports the approximate distance in time between two datetime objects or integers.
14   
15    For example, if the distance is 47 minutes, it'll return
16    "about 1 hour". See the source for the complete wording list.
17   
18    Integers are interpreted as seconds from now. So,
19    ``distance_of_time_in_words(50)`` returns "less than a minute".
20   
21    Set ``include_seconds`` to True if you want more detailed approximations if distance < 1 minute
22    """
23    if isinstance(from_time, int):
24        from_time = time.time()+from_time
25    else:
26        from_time = time.mktime(from_time.timetuple())
27    if isinstance(to_time, int):
28        to_time = time.time()+to_time
29    else:
30        to_time = time.mktime(to_time.timetuple())
31   
32    distance_in_minutes = int(round(abs(to_time-from_time)/60))
33    distance_in_seconds = int(round(abs(to_time-from_time)))
34   
35    if distance_in_minutes <= 1:
36        if include_seconds:
37            for remainder in [5, 10, 20]:
38                if distance_in_seconds < remainder:
39                    return "less than %s seconds" % remainder
40            if distance_in_seconds < 40:
41                return "half a minute"
42            elif distance_in_seconds < 60:
43                return "less than a minute"
44            else:
45                return "1 minute"
46        else:
47            if distance_in_minutes == 0:
48                return "less than a minute"
49            else:
50                return "1 minute"
51    elif distance_in_minutes <= 45:
52        return "%s minutes" % distance_in_minutes
53    elif distance_in_minutes <= 90:
54        return "about 1 hour"
55    elif distance_in_minutes <= 1440:
56        return "about %d hours" % (round(distance_in_minutes / 60.0))
57    elif distance_in_minutes <= 2880:
58        return "1 day"
59    elif distance_in_minutes <= 43220:
60        return "%d days" % (round(distance_in_minutes / 1440))
61    elif distance_in_minutes <= 86400:
62        return "about 1 month"
63    elif distance_in_minutes <= 525960:
64        return "%d months" % (round(distance_in_minutes / 43200))
65    elif distance_in_minutes <= 1051920:
66        return "about 1 year"
67    else:
68        return "over %d years" % (round(distance_in_minutes / 525600))
69
70def time_ago_in_words(from_time, include_seconds=False):
71    """
72    Like distance_of_time_in_words, but where ``to_time`` is fixed to ``datetime.now()``.
73    """
74    return distance_of_time_in_words(from_time, datetime.now(), include_seconds)
75
76__all__ = ['distance_of_time_in_words', 'time_ago_in_words']
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