#! /usr/bin/env python
# -*- coding: ISO-8859-15 -*-

# PyKota Print Quota Warning sender
#
# PyKota - Print Quotas for CUPS and LPRng
#
# (c) 2003, 2004, 2005, 2006, 2007 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# $Id$
#
#

import sys
import os
import pwd

from pykota.tool import PyKotaTool, PyKotaCommandLineError, crashed, N_

__doc__ = N_("""warnpykota v%(__version__)s (c) %(__years__)s %(__author__)s

Sends mail to users over print quota.

command line usage :

  warnpykota  [options]  [names]

options :

  -v | --version       Prints warnpykota's version number then exits.
  -h | --help          Prints this message then exits.
  
  -u | --users         Warns users over their print quota, this is the 
                       default.
  
  -g | --groups        Warns users whose groups quota are over limit.
  
  -P | --printer p     Verify quotas on this printer only. Actually p can
                       use wildcards characters to select only
                       some printers. The default value is *, meaning
                       all printers.
                       You can specify several names or wildcards, 
                       by separating them with commas.
  
examples :                              

  $ warnpykota --printer lp
  
  This will warn all users of the lp printer who have exceeded their
  print quota.

  $ warnpykota 
  
  This will warn all users  who have exceeded their print quota on
  any printer.

  $ warnpykota --groups --printer "laserjet*" "dev*"
  
  This will warn all users of groups which names begins with "dev" and
  who have exceeded their print quota on any printer which name begins 
  with "laserjet"
  
  If launched by an user who is not a PyKota administrator, additionnal
  arguments representing users or groups names are ignored, and only the
  current user/group is reported.
""")
        
class WarnPyKota(PyKotaTool) :        
    """A class for warnpykota."""
    def main(self, ugnames, options) :
        """Warn users or groups over print quota."""
        if self.config.isAdmin :
            # PyKota administrator
            if not ugnames :
                # no username, means all usernames
                ugnames = [ "*" ]
        else :        
            # not a PyKota administrator
            # warns only the current user
            # the utility of this is discutable, but at least it
            # protects other users from mail bombing if they are
            # over quota.
            username = pwd.getpwuid(os.geteuid())[0]
            if options["groups"] :
                user = self.storage.getUser(username)
                if user.Exists :
                    ugnames = [ g.Name for g in self.storage.getUserGroups(user) ]
                else :    
                    ugnames = [ ]
            else :
                ugnames = [ username ]
        
        printers = self.storage.getMatchingPrinters(options["printer"])
        if not printers :
            raise PyKotaCommandLineError, _("There's no printer matching %s") % options["printer"]
        alreadydone = {}
        for printer in printers :
            if options["groups"] :
                for (group, grouppquota) in self.storage.getPrinterGroupsAndQuotas(printer, ugnames) :
                    self.warnGroupPQuota(grouppquota)
            else :
                for (user, userpquota) in self.storage.getPrinterUsersAndQuotas(printer, ugnames) :
                    # we only want to warn users who have ever printed something
                    # and don't want to warn users who have never printed
                    if ((user.AccountBalance > self.config.getBalanceZero()) and \
                       (user.AccountBalance != user.LifeTimePaid)) or \
                       userpquota.PageCounter or userpquota.LifePageCounter or \
                       self.storage.getUserNbJobsFromHistory(user) :
                        done = alreadydone.get(user.Name)
                        if (user.LimitBy == 'quota') or not done :
                            action = self.warnUserPQuota(userpquota)
                            if not done :
                                alreadydone[user.Name] = (action in ('WARN', 'DENY'))
                     
if __name__ == "__main__" : 
    retcode = 0
    try :
        defaults = { \
                     "printer" : "*", \
                   }
        short_options = "vhugP:"
        long_options = ["help", "version", "users", "groups", "printer="]
        
        # Initializes the command line tool
        sender = WarnPyKota(doc=__doc__)
        sender.deferredInit()
        
        # parse and checks the command line
        (options, args) = sender.parseCommandline(sys.argv[1:], short_options, long_options, allownothing=1)
        
        # sets long options
        options["help"] = options["h"] or options["help"]
        options["version"] = options["v"] or options["version"]
        options["users"] = options["u"] or options["users"]
        options["groups"] = options["g"] or options["groups"]
        options["printer"] = options["P"] or options["printer"] or defaults["printer"]
        
        if options["help"] :
            sender.display_usage_and_quit()
        elif options["version"] :
            sender.display_version_and_quit()
        elif options["users"] and options["groups"] :    
            raise PyKotaCommandLineError, _("incompatible options, see help.")
        else :
            retcode = sender.main(args, options)
    except KeyboardInterrupt :        
        sys.stderr.write("\nInterrupted with Ctrl+C !\n")
        retcode = -3
    except PyKotaCommandLineError, msg :    
        sys.stderr.write("%s : %s\n" % (sys.argv[0], msg))
        retcode = -2
    except SystemExit :        
        pass
    except :
        try :
            sender.crashed("warnpykota failed")
        except :    
            crashed("warnpykota failed")
        retcode = -1
        
    try :
        sender.storage.close()
    except (TypeError, NameError, AttributeError) :    
        pass
        
    sys.exit(retcode)