Receiver = itsm.getParameter('EmailTo')  ## Provide an Toemail address where the mail need to be sent.
Sender = itsm.getParameter('EmailFrom')  ## Provide the From Email address from which the mail to be send
Password = itsm.getParameter('Password')               ##Provide password for from email
MailFlag = itsm.getParameter('MailFlag')  # Provide mail flag 1 or 0 (1 - outlook, 0 - gmail). the datatype should be a int.

import os
from subprocess import PIPE, Popen
import ctypes
import smtplib
import mimetypes
import socket
import ssl 
from email.mime.multipart import MIMEMultipart
from email.message import Message
from email.mime.text import MIMEText
import sys
import difflib,filecmp

class disable_file_system_redirection:
    _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection
    _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection
    def __enter__(self):
        self.old_value = ctypes.c_long()
        self.success = self._disable(ctypes.byref(self.old_value))
    def __exit__(self, type, value, traceback):
        if self.success:
            self._revert(self.old_value)

def alert(arg):
    sys.stderr.write("%d%d%d" % (arg, arg, arg))

def ecmd(command):
    from subprocess import Popen, PIPE
    import ctypes
    
    with disable_file_system_redirection():
        obj = Popen(command, shell = True, stdout = PIPE, stderr = PIPE)
    out, err = obj.communicate()
    ret=obj.returncode
    return ret,out,err

devicename = os.environ['COMPUTERNAME']
ip = socket.gethostbyname(socket.gethostname())
text = ""

def gmail(sender_email,password,receiver,text):
    msg = MIMEMultipart()
    msg["From"] = sender_email
    msg["To"] = receiver
    msg["Subject"] = "local user accounts change details for the DeviceName:%s and IP:%s"%(devicename,ip)
    attachment = MIMEText(text, _subtype="plain")
    attachment.add_header('Content-Disposition', 'attachment', filename="%s_Local_UserAccount_changes.txt"%(devicename))
    msg.attach(attachment)
    if MailFlag:
        server = smtplib.SMTP("smtp.office365.com", 587)
    else:
        server = smtplib.SMTP("smtp.gmail.com", 587)
    server.starttls()
    server.login(sender_email,password)
    server.sendmail(sender_email, receiver, msg.as_string())
    server.quit()
    print("successfully sent the mail")


ret,out,err = ecmd('wmic UserAccount get Name')

check = ["Administrator", "DefaultAccount", "Guest", "WDAGUtilityAccount", "Name"]

Local_users = [i.strip() for i in out.strip().splitlines() if i.strip() and i.strip() not in check]

file_dir= os.path.join(os.environ['ProgramData'],'UserList')

if not os.path.exists(file_dir):
    os.makedirs(file_dir)
    print("running this script for the first time on this machine")

fileToSend1=os.path.join(file_dir,'UserList1.txt')
fileToSend2=os.path.join(file_dir,'UserList2.txt')

file1=fileToSend1
file2=fileToSend2

def files():
     if os.path.exists(fileToSend1):
         fnd=1
     else:
         fnd=2
     return fnd
    
def write():
    f=files()
    os.chdir(file_dir)
    if f==2:
        with open(fileToSend1, 'w+') as f:
            for i in Local_users:
              f.write("%s\n"%(i))
                    
        with open(fileToSend2, 'w+') as f:
            for i in Local_users:
              f.write("%s\n"%(i))
    if f==1:
        with open(fileToSend2, 'w+') as f:
            for i in Local_users:
                f.write("%s\n"%(i))
          
  
def compare():
 global text
 ale=0
 with open(file1) as file:
  data=file.read()
 with open(file2) as file:
  data2=file.read()
 text1Lines = data.splitlines(1)
 text2Lines = data2.splitlines(1)  
 diffInstance = difflib.Differ()
 if len(text1Lines)==len(text2Lines):
     diffList = list(diffInstance.compare(text2Lines, text1Lines))
     li=[]
     li1=[]
     for line in diffList:
         if line.startswith('+'):
             k=line.strip().strip('+')
             li.append(k)
         if line.startswith('-'):
             k1=line.strip().strip('-')
             li1.append(k1)
     if li and li1:
         ale=1
         for i in li :
             for j in li1 :
                 print('old user account "%s" has been deleted and replaced with the new user "%s"'%(i.strip(),j.strip()))
                 text+=('old user "%s" has been deleted and replaced with the new user "%s"\n'%(i.strip(),j.strip()))
     else:
         print("No changes in local user accounts")
         text += "No changes in local user accounts"
         ale=0
                  
 else:
     diffList = list(diffInstance.compare(text2Lines, text1Lines))
     for line in diffList:
      if line[0] == '-':
       print('new user account "%s" has been created'%(line.strip('-').strip()))
       text +=('new user account "%s" has been created\n'%(line.strip('-').strip()))
       ale=1
     diffList = list(diffInstance.compare(text1Lines, text2Lines))
     for line in diffList:
      if line[0] == '-':
       print('"%s" user account has been deleted'%(line.strip('-').strip()))
       text +=('"%s" user account has been deleted\n'%(line.strip('-').strip()))
       ale=1
 return ale

write()
        
def remove():
    os.remove(fileToSend1)
    os.rename(fileToSend2,fileToSend1)

c=compare()

if c==1:
    alert(1)
    gmail(Sender,Password,Receiver,text)
    remove()
else:
    alert(0)
    remove()