#
# Copyright (C) 2019-2025  Leo P. Singer <leo.singer@ligo.org>
#
# This program 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.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
#


def str_or_collection(values):
    if values is None:
        values = []
    elif isinstance(values, str):
        values = [values]
    return values


def field_collection(key, values):
    return [(key, value) for value in str_or_collection(values)]
