#! /usr/bin/python -E
# Authors: Rob Crittenden <rcritten@redhat.com>
#
# Copyright (C) 2007  Red Hat
# see file 'COPYING' for use and warranty information
#
# 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; version 2 only
#   
# 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
#   
import sys
try:
    from optparse import OptionParser
    import ipa.ipaclient as ipaclient
    import ipa.config
    import ipa.ipautil as ipautil

    import operator
    import xmlrpclib
    import kerberos
    import errno

    import ipa.aci
    from ipa import ipaerror
except ImportError:
    print >> sys.stderr, """\
There was a problem importing one of the required Python modules. The
error was:

    %s
""" % sys.exc_value
    sys.exit(1)

aci_fields = ['*', 'aci']
def usage():
    print "ipa-listdelgation [-v|--verbose]"
    sys.exit(1)

def parse_options():
    parser = OptionParser()
    parser.add_option("--usage", action="store_true",
                      help="Program usage")
    parser.add_option("-v", "--verbose", action="store_true", dest="verbose",
                      help="Verbose output of the XML-RPC connection")

    args = ipa.config.init_config(sys.argv)
    options, args = parser.parse_args(args)

    return options, args

def main():

    options, args = parse_options()

    if options.usage:
        usage()

    client = ipaclient.IPAClient()
    aci_entry = client.get_aci_entry(aci_fields)

    aci_str_list = aci_entry.getValues('aci')
    if aci_str_list is None:
        aci_str_list = []
    if not(isinstance(aci_str_list,list) or isinstance(aci_str_list,tuple)):
        aci_str_list = [aci_str_list]

    aci_list = []
    for aci_str in aci_str_list:
        try:
            aci = ipa.aci.ACI(aci_str)
            aci_list.append(aci)
        except SyntaxError:
            # ignore aci_str's that ACI can't parse
            pass

    group_dn_to_cn = ipa.aci.extract_group_cns(aci_list, client)

    # the operator.itemgetter(0) lets us sort by the name field
    for a in sorted(aci_list, key=operator.itemgetter(0)):
        labels = client.attrs_to_labels(a.attrs)
        print "Delegation Name: " + a.name
        print "Group " + group_dn_to_cn[a.source_group] 
        print "  can modify these attributes: "
        for l in labels:
            print "\t" + labels[l]
        print "  for group " + group_dn_to_cn[a.dest_group]
        print

    return 0

try:
    if __name__ == "__main__":
        sys.exit(main())
except SystemExit, e:
    sys.exit(e)
except KeyboardInterrupt, e:
    sys.exit(1)
except xmlrpclib.Fault, fault:
    if fault.faultCode == errno.ECONNREFUSED:
        print "The IPA XML-RPC service is not responding."
    else:
        print fault.faultString
    sys.exit(1)
except kerberos.GSSError, e:
    print "Could not initialize GSSAPI: %s/%s" % (ipautil.get_gsserror(e))
    sys.exit(1)
except xmlrpclib.ProtocolError, e:
    print "Unable to connect to IPA server: %s" % (e.errmsg)
    sys.exit(1)
except ipaerror.IPAError, e:
    print("Delegation list failed: " + str(e))
    sys.exit(1)
except Exception, e:
    print "%s" % str(e)
    sys.exit(1)