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- # systemctl-mqtt - MQTT client triggering & reporting shutdown on systemd-based systems
- #
- # Copyright (C) 2020 Fabian Peter Hammerle <fabian@hammerle.me>
- #
- # 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
- # 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/>.
- import re
- import systemctl_mqtt._utils
- NODE_ID_ALLOWED_CHARS = r"a-zA-Z0-9_-"
- def get_default_node_id() -> str:
- return re.sub(
- f"[^{NODE_ID_ALLOWED_CHARS}]",
- "",
- # pylint: disable=protected-access
- systemctl_mqtt._utils.get_hostname(),
- )
- def validate_node_id(node_id: str) -> bool:
- return re.match(f"^[{NODE_ID_ALLOWED_CHARS}]+$", node_id) is not None
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