1 #

     2 # Copyright (c) 2008-2015 Thierry Florac <tflorac AT ulthar.net>

     3 # All Rights Reserved.

     4 #

     5 # This software is subject to the provisions of the Zope Public License,

     6 # Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.

     7 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED

     8 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

     9 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS

    10 # FOR A PARTICULAR PURPOSE.

    11 #

    12 

    13 __docformat__ = 'restructuredtext'

    14 

    15 

    16 # import standard library

    17 from datetime import datetime

    18 

    19 import pytz

    20 

    21 

    22 # import interfaces

    23 from pyams_utils.interfaces.timezone import IServerTimezone

    24 from pyramid.interfaces import IRequest

    25 from zope.interface.common.idatetime import ITZInfo

    26 

    27 # import packages

    28 from pyams_utils.adapter import adapter_config

    29 from pyams_utils.registry import query_utility

    30 

    31 

    32 GMT = pytz.timezone('GMT')

    33 _tz = pytz.timezone('Europe/Paris')

    34 tz = _tz

    35 

    36 

    37 @adapter_config(context=IRequest, provides=ITZInfo)

    38 def tzinfo(request=None):

    39     """request to timezone adapter

    40 

    41     There is no easy way to get timezone from a request.

    42     This adapter assumes that the timezone is given by

    43     a registered utility...

    44     """

    45     util = query_utility(IServerTimezone)

    46     if util is not None:

    47         return pytz.timezone(util.timezone)

    48     return GMT

    49 

    50 

    51 def tztime(value):

    52     if not value:

    53         return None

    54     if not isinstance(value, datetime):

    55         return value

    56     if not value.tzinfo:

    57         value = GMT.localize(value)

    58     return value.astimezone(tzinfo())

    59 

    60 

    61 def gmtime(value):

    62     if not value:

    63         return None

    64     if not isinstance(value, datetime):

    65         return value

    66     if not value.tzinfo:

    67         value = GMT.localize(value)

    68     return value.astimezone(GMT)