1 ### -*- coding: utf-8 -*- ####################################################

     2 ##############################################################################

     3 #

     4 # Copyright (c) 2008-2010 Thierry Florac <tflorac AT ulthar.net>

     5 # All Rights Reserved.

     6 #

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

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

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

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

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

    12 # FOR A PARTICULAR PURPOSE.

    13 #

    14 ##############################################################################

    15 

    16 __docformat__ = "restructuredtext"

    17 

    18 # import standard packages

    19 import pytz

    20 

    21 # import Zope3 interfaces

    22 from zope.interface.common.idatetime import ITZInfo

    23 from zope.publisher.interfaces.browser import IBrowserRequest

    24 

    25 # import local interfaces

    26 from ztfy.utils.timezone.interfaces import IServerTimezone

    27 

    28 # import Zope3 packages

    29 from zope.component import adapter, queryUtility

    30 from zope.interface import implementer

    31 

    32 # import local packages

    33 

    34 

    35 GMT = pytz.timezone('GMT')

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

    37 tz = _tz

    38 

    39 @implementer(ITZInfo)

    40 @adapter(IBrowserRequest)

    41 def tzinfo(request=None):

    42     util = queryUtility(IServerTimezone)

    43     if util is not None:

    44         return pytz.timezone(util.timezone)

    45     return GMT

    46 

    47 

    48 def tztime(value):

    49     if not value:

    50         return None

    51     if not value.tzinfo:

    52         value = GMT.localize(value)

    53     return value.astimezone(tzinfo())

    54 

    55 

    56 def gmtime(value):

    57     if not value:

    58         return None

    59     if not value.tzinfo:

    60         value = GMT.localize(value)

    61     return value.astimezone(GMT)