#!/usr/bin/python3
#
# Univention Monitoring Plugin
#  check_univention_printerqueue: check status for printer queues
#
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# Copyright 2007-2024 Univention GmbH
#
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# All rights reserved.
#
# The source code of this program is made available
# under the terms of the GNU Affero General Public License version 3
# (GNU AGPL V3) as published by the Free Software Foundation.
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import shlex

from univention.config_registry import ucr
from univention.monitoring import Alert


class Printerqueue(Alert):

    def write_metrics(self):
        for printer in shlex.split(ucr.get('monitoring/printerqueue/printers', '')):
            self.write_metric_for_printer(printer)

    def write_metric_for_printer(self, printer):
        rc, output = self.exec_command(['lpq', '-P', printer], env={'LANG': 'C'})
        if rc != 0:
            self.write_metric('univention_printerqueue_jobs', -1, printer=printer)
            self.log.debug('error while executing lpq: %s' % (output,))
            return

        if 'is ready' not in output.splitlines()[0]:
            self.write_metric('univention_printerqueue_jobs', -1, printer=printer)
            self.log.debug('printer is not ready: %s' % (output.splitlines()[0],))
            return

        jobs = len(output.splitlines()[2:])
        self.write_metric('univention_printerqueue_jobs', jobs, printer=printer)


if __name__ == '__main__':
    Printerqueue.main()
