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

# PyKota Print Quota Quote sender
#
# PyKota - Print Quotas for CUPS and LPRng
#
# (c) 2003-2004 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
#
# $Id$
#
# $Log$
# Revision 1.7  2004/01/12 22:43:40  jalet
# New formula to compute a job's price
#
# Revision 1.6  2004/01/08 14:10:32  jalet
# Copyright year changed.
#
# Revision 1.5  2003/10/09 21:25:25  jalet
# Multiple printer names or wildcards can be passed on the command line
# separated with commas.
# Beta phase.
#
# Revision 1.4  2003/10/07 09:07:27  jalet
# Character encoding added to please latest version of Python
#
# Revision 1.3  2003/07/29 20:55:17  jalet
# 1.14 is out !
#
# Revision 1.2  2003/07/25 10:41:29  jalet
# Better documentation.
# pykotme now displays the current user's account balance.
# Some test changed in ldap module.
#
# Revision 1.1  2003/07/03 09:44:01  jalet
# Now includes the pykotme utility
#
#
#

import sys
import os
import pwd

from pykota import version
from pykota.tool import PyKotaTool, PyKotaToolError
from pykota.config import PyKotaConfigError
from pykota.storage import PyKotaStorageError

__doc__ = """pykotme v%s (c) 2003-2004 C@LL - Conseil Internet & Logiciels Libres

Gives print quotes to users.

command line usage :

  pykotme  [options]  [files]

options :

  -v | --version       Prints pykotme's version number then exits.
  -h | --help          Prints this message then exits.
  
  -P | --printer p     Gives a quote for 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 :                              

  $ pykotme --printer apple file1.ps file2.ps
  
  This will give a print quote to the current user. The quote will show
  the price and size of a job consisting in file1.ps and file2.ps 
  which would be sent to the apple printer.
  
  $ pykotme --printer apple,hplaser <file1.ps
  
  This will give a print quote to the current user. The quote will show
  the price and size of a job consisting in file1.ps as read from
  standard input, which would be sent to the apple or hplaser
  printer.

  $ pykotme 
  
  This will give a quote for a job consisting of what is on standard 
  input. The quote will list the job size, and the price the job
  would cost on each printer.


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., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.

Please e-mail bugs to: %s""" % (version.__version__, version.__author__)
        
class PyKotMe(PyKotaTool) :        
    """A class for pykotme."""
    def main(self, files, options) :
        """Gives print quotes."""
        if not files :
            files = [ sys.stdin ]
            
        nbpages = 0    
        for filename in files :
            if filename is sys.stdin :
                stream = filename
            else :
                if filename == "-" :
                    stream = sys.stdin
                else :    
                    try :
                        stream = open(filename, "rb")
                    except IOError, msg :    
                        sys.stderr.write("%s\n" % msg)
                        continue
            nb = self.getNbPages(stream)
            if nb is None :
                sys.stderr.write(_("Unable to compute size of %s in number of pages.\n") % filename)
            else :
                nbpages += nb
            if not (filename is sys.stdin) :        
                stream.close()
                
        # get current user
        uid = os.geteuid()
        username = pwd.getpwuid(uid)[0]
        user = self.storage.getUser(username)
        if user.Exists and user.LimitBy and (user.LimitBy.lower() == "balance"):
            print _("Your account balance : %.2f") % (user.AccountBalance or 0.0)
            
        printers = self.storage.getMatchingPrinters(options["printer"])
        if not printers :
            raise PyKotaToolError, _("There's no printer matching %s") % options["printer"]
            
        print _("Job size : %i pages") % nbpages    
        for printer in printers :
            userpquota = self.storage.getUserPQuota(user, printer)
            cost = userpquota.computeJobPrice(nbpages)
            print _("Cost on printer %s : %.2f") % (printer.Name, cost)
            
    def getNbPages(self, stream) :        
        """Tries to compute the file's size in number of pages, the best we can."""
        nbpages = [] # in case some user wants to put several %%Pages: entries in the file
        for line in stream.xreadlines() :
            line = line.strip()
            if line.startswith("%%Pages: ") :
                try :
                    nbpages.append(int(line[9:]))
                except ValueError :    
                    pass
        if nbpages :            
            return max(nbpages)
        
if __name__ == "__main__" : 
    retcode = 0
    try :
        defaults = { \
                     "printer" : "*", \
                   }
        short_options = "vhP:"
        long_options = ["help", "version", "printer="]
        
        # Initializes the command line tool
        sender = PyKotMe(doc=__doc__)
        
        # 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["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()
        else :
            retcode = sender.main(args, options)
    except (PyKotaToolError, PyKotaConfigError, PyKotaStorageError), msg :            
        sys.stderr.write("%s\n" % msg)
        sys.stderr.flush()
        retcode = -1

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