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

# PyKota Print Quota Reports generator
#
# 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 mx import DateTime

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

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

Generates print quota reports.

command line usage :

  repykota [options] 

options :

  -v | --version       Prints repykota's version number then exits.
  -h | --help          Prints this message then exits.
  
  -u | --users         Generates a report on users quota, this is 
                       the default.
  
  -g | --groups        Generates a report on group quota instead of users.
  
  -i | --ingroups g1[,g2...]  Only lists users who are members of these
                              groups. Reserved to PyKota Administrators.
  
  -P | --printer p     Report 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 :                              

  $ repykota --printer lp
  
  This will print the quota status for all users who use the lp printer.

  $ repykota 
  
  This will print the quota status for all users on all printers.
  
  $ repykota --printer "laser*,*pson" jerome "jo*"
  
  This will print the quota status for user jerome and all users
  whose name begins with "jo" on all printers which name begins
  with "laser" or ends with "pson".
  
  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 RePyKota(PyKotaTool) :        
    """A class for repykota."""
    def main(self, ugnames, options) :
        """Print Quota reports generator."""
        if self.config.isAdmin :
            # PyKota administrator
            if not ugnames :
                # no username, means all usernames
                ugnames = [ "*" ]
                
            if options["ingroups"] :
                groupsnames = options["ingroups"].split(",")
                groups = [self.storage.getGroup(gname) for gname in groupsnames]
                members = {}
                for group in groups :
                    if not group.Exists :
                        self.printInfo("Group %s doesn't exist." % group.Name, "warn")
                    else :    
                        for user in self.storage.getGroupMembers(group) :
                            members[user.Name] = user
                ugnames = [ m for m in members.keys() if self.matchString(m, ugnames) ]
        else :        
            # reports only the current user
            if options["ingroups"] :
                raise PyKotaCommandLineError, _("Option --ingroups is reserved to PyKota Administrators.")
                
            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"]
            
        self.reportingtool = reporter.openReporter(self, "text", printers, ugnames, (options["groups"] and 1) or 0)    
        print self.reportingtool.generateReport()
                    
if __name__ == "__main__" : 
    retcode = 0
    try :
        defaults = { \
                     "printer" : "*", \
                   }
        short_options = "vhugi:P:"
        long_options = ["help", "version", "users", "groups", "ingroups=", "printer="]
        
        # Initializes the command line tool
        reportTool = RePyKota(doc=__doc__)
        reportTool.deferredInit()
        
        # parse and checks the command line
        (options, args) = reportTool.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"]
        options["ingroups"] = options["i"] or options["ingroups"]
        
        if options["help"] :
            reportTool.display_usage_and_quit()
        elif options["version"] :
            reportTool.display_version_and_quit()
        elif (options["users"] or options["ingroups"]) and options["groups"] :
            raise PyKotaCommandLineError, _("incompatible options, see help.")
        else :
            retcode = reportTool.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 :
            reportTool.crashed("repykota failed")
        except :    
            crashed("repykota failed")
        retcode = -1

    try :
        reportTool.storage.close()
    except (TypeError, NameError, AttributeError) :    
        pass
        
    sys.exit(retcode)