#! /usr/bin/env python
# -*- coding: utf-8 -*-
#
# PyKota : Print Quotas for CUPS
#
# (c) 2003-2013 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/>.
#
# $Id$
#
#

"""Minimalist print accounting reports for PyKota."""

import sys
import os
import pwd

from mx import DateTime

import pykota.appinit
from pykota.utils import run
from pykota.commandline import PyKotaOptionParser
from pykota.errors import PyKotaCommandLineError
from pykota.tool import PyKotaTool
from pykota import reporter

class RePyKota(PyKotaTool) :
    """A class for repykota."""
    def main(self, ugnames, options) :
        """Print Quota reports generator."""
        if options.ingroups and options.groups :
            raise PyKotaCommandLineError, _("Incompatible options, see help.")

        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)
        self.display(self.reportingtool.generateReport())

if __name__ == "__main__" :
    parser = PyKotaOptionParser(description=_("Minimalist print accounting reports for PyKota. If not launched by a PyKota administrator, additionnal arguments representing users or groups names are ignored, limiting the scope of the reports to the current user."),
                                usage="repykota [options] [usernames|groupnames]")
    parser.add_option("-g", "--groups",
                            action="store_true",
                            dest="groups",
                            help=_("Generate group print quota reports instead of user print quota reports."))
    parser.add_option("-i", "--ingroups",
                            dest="ingroups",
                            help=_("Only report users who are members of the specified groups. This option is reserved to PyKota administrators."))
    parser.add_option("-P", "--printer",
                            dest="printer",
                            default="*",
                            help=_("Acts on this printer only. You can specify several printer names by separating them with commas. The default value is '%default', which means all printers."))

    parser.add_example('',
                       _("This would generate a report for all users on all printers."))
    parser.add_example('--printer HP2100',
                       _("This would generate a report for all users who print to printer 'HP2100'."))
    parser.add_example('--printer "laser*,*pson" jerome "jo*"',
                       _("This would generate a report for all users named 'jerome' or whose name begins with 'jo', on all printers which name begins with 'laser' or ends with 'pson'."))

    run(parser, RePyKota)