# Copyright (c) 2017-2019 The University of Manchester
#
# 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 <http://www.gnu.org/licenses/>.

_already_issued = set()


def warn_once(logger, msg):
    if msg in _already_issued:
        return
    _already_issued.add(msg)
    logger.warning(msg)


def error_once(logger, msg):
    if msg in _already_issued:
        return
    _already_issued.add(msg)
    logger.error(msg)


def reset():
    global _already_issued
    _already_issued = set()
