#! /usr/bin/env python
# -*- coding: utf-8 -*-
#
# pkipplib : IPP and CUPS support for Python
#
# (c) 2003-2009 Jerome Alet <alet@librelogiciel.com>
# 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/>.
#

"""This command can be placed in /usr/lib/cups/notifier and
used as the notifications' recipient when creating IPP subscriptions.

It will automatically ensures that each time a printer is added or
removed from CUPS it is also added or removed from PyKota's database.

IMPORTANT : because of a bug in CUPS 1.2.1, this command only works
the first time a notification is sent."""

import sys
import os
import fcntl

from pkipplib import pkipplib

if __name__ == "__main__" :
    #
    # First thing we do is put stdin in non-blocking mode.
    fd = sys.stdin.fileno()
    fcntl.fcntl(sys.stdin.fileno(), fcntl.F_SETFL,
                    fcntl.fcntl(fd, fcntl.F_GETFL) | os.O_NONBLOCK)

    # then we read the notification CUPS sent us to our stdin
    notification = pkipplib.IPPRequest(sys.stdin.read())

    # now we parse it
    notification.parse()

    # then we act one way or another, depending on the event received.
    event = notification.event_notification["notify-subscribed-event"][0][1]
    if event in ("printer-added", "printer-deleted") :
        printername = notification.event_notification["printer-name"][0][1]
        if event.endswith("-added") :
            action = "add"
        else :
            action = "delete"
        os.system('/usr/bin/pkprinters --%s "%s"' % (action, printername))