#!/usr/bin/env python
#------------------------------------------------------------------------------
# Copyright (c) Perforce Software, Inc., 2007-2015. All rights reserved
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1  Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# 2.  Redistributions in binary form must reproduce the above copyright
#     notice, this list of conditions and the following disclaimer in the
#     documentation and/or other materials provided with the distribution.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PERFORCE
# SOFTWARE, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
# ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
# DAMAGE.
#------------------------------------------------------------------------------

USAGE = """
This script will remove the specified users from given group.

Usage:
 	removeusersfromgroup.py [instance] USER groupname
 	removeusersfromgroup.py [instance] FILE groupname

USER can be a single username or, it can be a FILE with a list of users.

instance defaults to 1 if not given.
"""

import os
import re
import string
import sys
import time
import platform
import ConfigParser

if len(sys.argv) > 3:
  P4INSTANCE = str(sys.argv[1])
else:
  P4INSTANCE = '1'

config = ConfigParser.RawConfigParser()
config.read('maintenance.cfg')

##########################################################################
#####                                                                #####
#####  CONFIGURATION VARIABLES: Modify in maintenance.cfg as needed. #####
#####                                                                #####

server = (config.get(P4INSTANCE, 'server'))
p4user = (config.get(P4INSTANCE, 'p4user'))
passwd = (config.get(P4INSTANCE, 'passwd'))

if platform.system() == "Windows": 
  p4="p4.exe -p %s -u %s" % (server, p4user)
else:
  p4="/p4/1/bin/p4_1  -p %s -u %s" % (server, p4user)

os.system('echo %s| %s login' % (passwd, p4))

def removeuser(username, groupname, groupfile):
	newgroupfile = groupfile + ".new"
	infile = open (groupfile, "r")
	outfile = open (newgroupfile, "w")
	for line in infile.readlines():
		if username.lower() != (line.strip()).lower():
			outfile.write(line)
	infile.close()
	outfile.close()
	os.remove(groupfile)
	os.rename(newgroupfile, groupfile)

def cleanup(groupfile):
	print("Cleaning temp files")
	try:
		os.remove(groupfile)
	except:
		print "Failed to delete " + groupfile

def main():
  if len (sys.argv) < 3:
    print USAGE
    sys.exit (1)

# Handle the optional instance parameter shift
  if len(sys.argv) > 3:
    userorfile=(sys.argv[2])
    groupname = sys.argv[3].strip()
  else:
    userorfile=(sys.argv[1])	
    groupname = sys.argv[2].strip()

  global initialized
  initialized = 0
  groupfile = "%s.group" % groupname
  os.system ("%s group -o %s > %s" % (p4, groupname, groupfile))

  try:
    userlistfile = open( userorfile, "r" )
    for line in userlistfile.readlines():
      removeuser(line.strip(), groupname, groupfile)
  except:
    print("No file %s available, assuming it is the actual user name." % userorfile)
    removeuser(userorfile, groupname, groupfile)

  os.system ("%s group -i < %s" % (p4, groupfile))
  cleanup(groupfile)

if __name__ == '__main__':
  main()