src/cm/utils/timezone.py
author Simon Descarpentries <sid@sopinspace.com>
Fri, 20 Sep 2013 16:28:40 +0200
changeset 536 0c625ce49a81
parent 275 5339e9e0e186
permissions -rw-r--r--
- updating jQuery (1.3.2 -> 1.10.2), jQuery UI, jQuery modules - [text_view_frame.html] Add some JS driven CSS tricks for iPad - [text_view_frame.html] move throbber's hiding-call in nested text_view_comments iframe onload signal (so it works with jQuery 1.10.2 and the hiding timing is good) - [text_view_frame.html][base.html] factorize req_yui.html et req_jquery.html - [main_tabs][text_tabs][f_client-min.js] rewrite jQuery UI Tabs API calls select in active - [base.css] CSS fix grey frame appearence for all tabs - hg remove bgiframe -> not loaded in templates anymore - hg remove header_custom.html -> the file has been empty since 4 years - hg remove controls.html -> the file has been empty since 4 years

from datetime import timedelta
from pytz import timezone, utc, UnknownTimeZoneError
from django.conf import settings

local_tz = timezone(settings.TIME_ZONE)

def request_tz_convert(date, request):
    return tz_convert(date, request.session.get('tz',None))

def tz_convert(date, tz):
    """
    Convert date to time zone
    tz can be;
        - '-2' (relative to utc)
        - 'Paris/Europe' real timezone like (cf pytz)
    """
    if tz:
        system_local_date = local_tz.localize(date)
        try:
             # simple utc delta?
            utc_offset = int(tz)
            utc_time = system_local_date.astimezone(utc)
            res = utc.normalize(utc_time + timedelta(hours=utc_offset))
            return res
        except:
            try:
                # real timezone
                timez = timezone(tz)
                local_date = system_local_date.astimezone(timez)
                return local_date
            except UnknownTimeZoneError:
                # fall back to date
                return date
                        
    else:
        return date