Source code for inspirehep.modules.forms.validators.dynamic_fields

# -*- coding: utf-8 -*-
#
# This file is part of INSPIRE.
# Copyright (C) 2014-2017 CERN.
#
# INSPIRE is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# INSPIRE 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with INSPIRE. If not, see <http://www.gnu.org/licenses/>.
#
# In applying this license, CERN does not waive the privileges and immunities
# granted to it by virtue of its status as an Intergovernmental Organization
# or submit itself to any jurisdiction.

from __future__ import absolute_import, division, print_function

from wtforms.validators import StopValidation, ValidationError


class AuthorsValidation(object):
    """
    Validate authors field.

    empty_aff: validates if there are empty names with filled affiliations.

    author_names: validates if there is at least one author.
    """
    field_flags = ('required', )

    def __init__(self, form, field):
        empty_aff = filter(lambda x: x['name'] == '' and x['affiliation'] != '',
                           field.data)

        author_names = filter(lambda x: x['name'] != '', field.data)

        if empty_aff:
            message = field.gettext('Affiliations should have an author name associated.')
            raise StopValidation(message)
        elif not author_names:
            message = field.gettext('At least one author is required.')
            raise StopValidation(message)


class LessThan(object):
    """
    Compares the values of two fields.
    param fieldname: the name of the other field to compare to.
    param message: error message to raise in case of a validation error. Can be
    interpolated with `%(other_label)s` and `%(other_name)s` to provide a
    more helpful error.
    """
    def __init__(self, fieldname, message=None):
        self.fieldname = fieldname
        self.message = message

    def __call__(self, form, field):
        try:
            other = form[self.fieldname]
        except KeyError:
            raise ValidationError(field.gettext("Invalid field name '%s'.") % self.fieldname)
        if other.data == '' or field.data == '':
            return
        elif field.data > other.data:
            message = self.message
            if message is None:
                message = field.gettext('Field must be less than %(other_name)s.')
            raise StopValidation(message)