tiramisu/tiramisu/option/intoption.py

# -*- coding: utf-8 -*-
# Copyright (C) 2017-2018 Team tiramisu (see AUTHORS for all contributors)
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 3 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
# The original `Config` design model is unproudly borrowed from
# the rough pypy's guys: http://codespeak.net/svn/pypy/dist/pypy/config/
# the whole pypy projet is under MIT licence
# ____________________________________________________________

from ..setting import undefined
from ..i18n import _
from .option import Option


class IntOption(Option):
    "represents a choice of an integer"
    __slots__ = tuple()
    _display_name = _('integer')

    def __init__(self,
                 name,
                 *args,
                 min_number=None,
                 max_number=None,
                 **kwargs):
        extra = {}
        if min_number is not None:
            extra['min_number'] = min_number
        if max_number is not None:
            extra['max_number'] = min_number
        super().__init__(name, extra=extra, *args, **kwargs)


    def _validate(self,
                  value,
                  *args,
                  **kwargs):
        if not isinstance(value, int):
            raise ValueError()
        min_number = self._get_extra('min_number')
        if min_number and value < min_number:
            raise ValueError(_('value must be greater than "{0}"'.format(min_number)))
        max_number = self._get_extra('max_number')
        if max_number and value > max_number:
            raise ValueError(_('value must be less than "{0}"'.format(max_number)))