Set precise default portal timezone

marclava · September 21, 2020, 7:26pm

From /@@dateandtime-controlpanel the default portal timezone can be set, but the list is limited.
I'd like to set the time to my very own city, not the next largest city (in the same timezone).
Is there a way to set this timezone, maybe from the ZMI or a XML file in my policy package?

Update:
The lists of timezones in the control panel are from two vocabularies:
plone.app.vocabularies.CommonTimezones
plone.app.vocabularies.Timezones
(see class IDateAndTimeSchema in Products.CMFPlone.interfaces.controlpanel)

The vocabularies are defined in plone/app/vocabularies/configure.zcml

I would like to set plone.app.vocabularies.CommonTimezones to plone.app.vocabularies.Timezones
without modifying the source code of plone.app.vocabularies. How?

zopyx · September 29, 2020, 7:10pm

What is the usecase?

marclava · September 29, 2020, 7:24pm

I want events to have a timezone with my city as the location; I want "America/Montreal", not "America/Toronto". The default portal timezone should be allowed to use any available variation of timezones.

espenmn · September 29, 2020, 10:06pm

I got help once with something similar, maybe it can be useful:

jensens · September 29, 2020, 10:47pm

The implementation at

github.com

plone/plone.app.vocabularies/blob/73af3a780d15e496c469a3d282d29695836d688e/plone/app/vocabularies/datetimerelated.py#L36


    return SimpleVocabulary(tz_list)


@provider(IVocabularyFactory)
def CommonTimezonesFactory(context, query=None):
    """Vocabulary for common timezones.

    This are the timezones a user would choose from in a form.
    """
    tz_list = [SimpleTerm(value=it, title=PLMF(it, default=it))
               for it in pytz.common_timezones
               if query is None or query.lower() in it.lower()]
    return SimpleVocabulary(tz_list)


@provider(IVocabularyFactory)
def AvailableTimezonesFactory(context, query=None):
    """Vocabulary for available timezones, as set by in the controlpanel.
    """
    reg_key = 'plone.available_timezones'
    registry = getUtility(IRegistry)

is the base for the available timezones.

You can create a custom vocabulary as you like - as long the name of the timezone is a valid one from pytz.all_timezones list http://pytz.sourceforge.net/#helpers

zopyx · September 30, 2020, 4:28am

But why it this important having an alias for existing timezone offering the same TZ setting?

marclava · September 30, 2020, 7:33am

So that the timezone of events shows as happening in a specific city; that's pure chauvinism at work, and that could be why timezone aliases are for, unless I'm mistaken.