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# SPDX-License-Identifier: AGPL-3.0-or-later
"""
Forms for configuring date and time
"""
import logging
import subprocess
from django import forms
from django.utils.translation import gettext_lazy as _
logger = logging.getLogger(__name__)
class DateTimeForm(forms.Form):
"""Date/time configuration form."""
time_zone = forms.ChoiceField(
label=_('Time Zone'),
help_text=_('Set your time zone to get accurate timestamps. '
'This will set the system-wide time zone.'))
def __init__(self, *args, **kwargs):
"""Initialize the date/time form."""
forms.Form.__init__(self, *args, **kwargs)
time_zone_options = [(zone, zone) for zone in self.get_time_zones()]
# Show not-set option only when time zone is not set
current_time_zone = self.initial.get('time_zone')
if current_time_zone == 'none':
time_zone_options.insert(0, ('none', _('-- no time zone set --')))
elif (current_time_zone, current_time_zone) not in time_zone_options:
time_zone_options.insert(0, (current_time_zone, current_time_zone))
self.fields['time_zone'].choices = time_zone_options
@staticmethod
def get_time_zones():
"""Return the list time zones."""
command = ['timedatectl', 'list-timezones']
try:
process = subprocess.run(command, stdout=subprocess.PIPE,
check=True)
except subprocess.CalledProcessError as exception:
logger.exception('Error getting time zones: %s', exception)
return []
output = process.stdout.decode()
return output.splitlines()
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