root / pykota / trunk / bin / warnpykota @ 3457

#! /usr/bin/env python
# -*- coding: utf-8 -*-*-
#
# PyKota : Print Quotas for CUPS
#
# (c) 2003, 2004, 2005, 2006, 2007, 2008 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/>.
#
# $Id$
#
#

"""This command line tool can automatically send periodic email
notifications to users or groups who have reached the limit of their
printing quota."""

import sys
import os
import pwd
import socket
import smtplib
from email.MIMEText import MIMEText
from email.Header import Header
import email.Utils

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

class WarnPyKota(PyKotaTool) :
    """A class for warnpykota."""
    def sendMessage(self, adminmail, touser, fullmessage) :
        """Sends an email message containing headers to some user."""
        smtpserver = self.smtpserver
        try :
            server = smtplib.SMTP(smtpserver)
        except socket.error, msg :
            self.printInfo(_("Impossible to connect to SMTP server : %(smtpserver)s") \
                                                % locals(), \
                           "error")
        else :
            try :
                server.sendmail(adminmail, [touser], fullmessage)
            except smtplib.SMTPException, answer :
                for (k, v) in answer.recipients.items() :
                    errormsg = v[0]
                    errorvalue = v[1]
                    self.printInfo(_("Impossible to send mail to %(touser)s, error %(errormsg)s : %(errorvalue)s") \
                                        % locals(), \
                                   "error")
            server.quit()

    def sendMessageToUser(self, admin, adminmail, user, subject, message) :
        """Sends an email message to a user."""
        message += _("\n\nPlease contact your system administrator :\n\n\t%s - <%s>\n") % (admin, adminmail)
        usermail = user.Email or user.Name
        if "@" not in usermail :
            usermail = "%s@%s" % (usermail, self.maildomain or self.smtpserver or "localhost")
        msg = MIMEText(message.encode(self.charset, "replace"), _charset=self.charset)
        msg["Subject"] = Header(subject, charset=self.charset)
        msg["From"] = adminmail
        msg["To"] = usermail
        msg["Date"] = email.Utils.formatdate(localtime=True)
        self.sendMessage(adminmail, usermail, msg.as_string())

    def sendMessageToAdmin(self, adminmail, subject, message) :
        """Sends an email message to the Print Quota administrator."""
        if "@" not in adminmail :
            adminmail = "%s@%s" % (adminmail, self.maildomain or self.smtpserver or "localhost")
        msg = MIMEText(message.encode(self.charset, "replace"), _charset=self.charset)
        msg["Subject"] = Header(subject, charset=self.charset)
        msg["From"] = adminmail
        msg["To"] = adminmail
        self.sendMessage(adminmail, adminmail, msg.as_string())

    def warnGroupPQuota(self, grouppquota) :
        """Checks a group quota and send messages if quota is exceeded on current printer."""
        group = grouppquota.Group
        groupname = group.Name
        printer = grouppquota.Printer
        printername = printer.Name
        admin = self.config.getAdmin(printername)
        adminmail = self.config.getAdminMail(printername)
        (mailto, arguments) = self.config.getMailTo(printername)
        if group.LimitBy in ("noquota", "nochange") :
            action = "ALLOW"
        else :
            action = self.checkGroupPQuota(grouppquota)
            if action.startswith("POLICY_") :
                action = action[7:]
            if action == "DENY" :
                adminmessage = _("Print Quota exceeded for group %(groupname)s on printer %(printername)s") % locals()
                self.printInfo(adminmessage)
                if mailto in [ "BOTH", "ADMIN" ] :
                    self.sendMessageToAdmin(adminmail, _("Print Quota"), adminmessage)
                if mailto in [ "BOTH", "USER", "EXTERNAL" ] :
                    for user in self.storage.getGroupMembers(group) :
                        if mailto != "EXTERNAL" :
                            self.sendMessageToUser(admin, adminmail, user, _("Print Quota Exceeded"), self.config.getHardWarn(printername))
                        else :
                            self.externalMailTo(arguments, action, user, printer, self.config.getHardWarn(printername))
            elif action == "WARN" :
                adminmessage = _("Print Quota low for group %(groupname)s on printer %(printername)s") % locals()
                self.printInfo(adminmessage)
                if mailto in [ "BOTH", "ADMIN" ] :
                    self.sendMessageToAdmin(adminmail, _("Print Quota"), adminmessage)
                if group.LimitBy and (group.LimitBy.lower() == "balance") :
                    message = self.config.getPoorWarn()
                else :
                    message = self.config.getSoftWarn(printername)
                if mailto in [ "BOTH", "USER", "EXTERNAL" ] :
                    for user in self.storage.getGroupMembers(group) :
                        if mailto != "EXTERNAL" :
                            self.sendMessageToUser(admin, adminmail, user, _("Print Quota Exceeded"), message)
                        else :
                            self.externalMailTo(arguments, action, user, printer, message)
        return action

    def warnUserPQuota(self, userpquota) :
        """Checks a user quota and send him a message if quota is exceeded on current printer."""
        user = userpquota.User
        username = user.Name
        printer = userpquota.Printer
        printername = printer.Name
        admin = self.config.getAdmin(printername)
        adminmail = self.config.getAdminMail(printername)
        (mailto, arguments) = self.config.getMailTo(printername)

        if user.LimitBy in ("noquota", "nochange") :
            action = "ALLOW"
        elif user.LimitBy == "noprint" :
            action = "DENY"
            message = _("User %(username)s is not allowed to print at this time.") % locals()
            self.printInfo(message)
            if mailto in [ "BOTH", "USER", "EXTERNAL" ] :
                if mailto != "EXTERNAL" :
                    self.sendMessageToUser(admin, adminmail, user, _("Printing denied."), message)
                else :
                    self.externalMailTo(arguments, action, user, printer, message)
            if mailto in [ "BOTH", "ADMIN" ] :
                self.sendMessageToAdmin(adminmail, _("Print Quota"), message)
        else :
            action = self.checkUserPQuota(userpquota)
            if action.startswith("POLICY_") :
                action = action[7:]

            if action == "DENY" :
                adminmessage = _("Print Quota exceeded for user %(username)s on printer %(printername)s") % locals()
                self.printInfo(adminmessage)
                if mailto in [ "BOTH", "USER", "EXTERNAL" ] :
                    message = self.config.getHardWarn(printername)
                    if mailto != "EXTERNAL" :
                        self.sendMessageToUser(admin, adminmail, user, _("Print Quota Exceeded"), message)
                    else :
                        self.externalMailTo(arguments, action, user, printer, message)
                if mailto in [ "BOTH", "ADMIN" ] :
                    self.sendMessageToAdmin(adminmail, _("Print Quota"), adminmessage)
            elif action == "WARN" :
                adminmessage = _("Print Quota low for user %(username)s on printer %(printername)s") % locals()
                self.printInfo(adminmessage)
                if mailto in [ "BOTH", "USER", "EXTERNAL" ] :
                    if user.LimitBy and (user.LimitBy.lower() == "balance") :
                        message = self.config.getPoorWarn()
                    else :
                        message = self.config.getSoftWarn(printername)
                    if mailto != "EXTERNAL" :
                        self.sendMessageToUser(admin, adminmail, user, _("Print Quota Low"), message)
                    else :
                        self.externalMailTo(arguments, action, user, printer, message)
                if mailto in [ "BOTH", "ADMIN" ] :
                    self.sendMessageToAdmin(adminmail, _("Print Quota"), adminmessage)
        return action

    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].decode("ANSI_X3.4-1968", "replace")
            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 ]

        printername = options.printer
        printers = self.storage.getMatchingPrinters(printername)
        if not printers :
            raise PyKotaCommandLineError, _("There's no printer matching %(printername)s") \
                                                        % locals()
        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__" :
    parser = PyKotaOptionParser(description=_("A tool to warn users and groups who have reached the limit of their printing quota."),
                                usage="warnpykota [options] [usernames|groupnames]")
    parser.add_option("-g", "--groups",
                            action="store_true",
                            dest="groups",
                            help=_("Notify all members for all the named groups which have reached the limit of their printing quota. Without this option, individual users are notified instead of users groups."))
    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 notify all users who have reached the limit of their printing quota on any printer."))
    parser.add_example('--printer HP2100',
                       _("This would notify all users who have reached the limit of their printing quota on printer 'HP2100'."))
    parser.add_example('--groups --printer "HP*,XER*" "dev*"',
                       _("This would notify all users of the groups whose name begins with 'dev' and for which the printing quota limit is reached on any printer whose name begins with 'HP' or 'XER'."))

    run(parser, WarnPyKota)