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 interfaces import IServerTimezone

    27 

    28 # import Zope3 packages

    29 from zope.app import zapi

    30 from zope.component import adapter

    31 from zope.interface import implementer

    32 

    33 # import local packages

    34 

    35 

    36 GMT = pytz.timezone('GMT')

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

    38 tz = _tz

    39 

    40 @implementer(ITZInfo)

    41 @adapter(IBrowserRequest)

    42 def tzinfo(request=None):

    43     util = zapi.queryUtility(IServerTimezone)

    44     if util is not None:

    45         return pytz.timezone(util.timezone)

    46     return GMT

    47 

    48 

    49 def tztime(value):

    50     if not value:

    51         return None

    52     if not value.tzinfo:

    53         value = GMT.localize(value)

    54     return value.astimezone(tzinfo())

    55 

    56 

    57 def gmtime(value):

    58     if not value:

    59         return None

    60     if not value.tzinfo:

    61         value = GMT.localize(value)

    62     return value.astimezone(GMT)