#!/usr/bin/perl

###################
#Packages required#
###################

use strict;
use List::MoreUtils qw(uniq);
use Data::Dumper;

############
#Parameters#
############

#First we define the path to the file we use
#do not put any /
my $dac02_location = "/dac03_scripts";
my $dac03_location = "/dac03_scripts/etc";

#name of the groups
my @group = ('jai', 'smbuser', 'domadm');
#number of max user on the system
my $i = 8;
#name of additional machines that are in passwd but not in group
my @add_machines=('dacsrv01$', 'dacwks01$', 'dacwks02$', 'dacwks03$', 
+'dacwks04$', 'dacwks05$', 'daceufo201$', 'dacluxe02$', 'dacluxe03$');
#special users to also update the password for
my @special_users=('root', 'nagios');

###########
#Functions#
###########

#To parse the data and store it in a hash
sub DataParsing{
    my ($file, @fields) = @_;

    my %data = ();
    my $item;

    open(DATA, $dac02_location."/".$file) or die "Cannot open the file
+!";

    while(<DATA>){
        chomp;

        foreach $item (@fields){
            if($_ =~ /$item/){
                $data{$item}=[split('[:,]',$_)];
                $data{$item.'_raw'} = $_;
            }
        }
    }

    close(DATA);

    return %data;
}

#Clean the file group and return an array with clean data to construct
+ the new one
sub CleanFiles{
    my ($file, @lines) = @_;

    my @data_file = ();

    open(DATA, $dac03_location."/".$file) or die "Cannot open the file
+!";

    #Store the text in an array, easier to work with
    while(<DATA>){
        chomp;
        push(@data_file,$_);
    }
    close(DATA);

    #initialize a value to count where we are in the array in order to
    #delete the lines we do not need
    my $i = 0;
    my $item;
    my $item2;
    foreach $item (@data_file){
        foreach $item2 (@lines){
            if ($item =~ /$item2/){
                splice(@data_file,$i,1);
            }
        }
        $i++
    }

#    foreach $item (@data_file){
#        print "$item\n";
#    }

    return @data_file;
}

#function to generate the new config files
sub CreateConfig{
    my ($file,@data) = @_;
    my $item;

    $file = $file.".new";

    open(NFILE,">$file");
    foreach $item (@data){
        printf NFILE "$item\n";
    }
    close(NFILE);

    return $file;
}

###########
#Instances#
###########

#hash of the group with the group name as reference
my %group = DataParsing('group', @group);
#print "$group{jai}[2]\n";

#put the usernames in an array to get info out of passwd
my $item;
my @username = ();
foreach $item (@group){
    for ($a = $i+1; $a > 2; $a--){
        if($group{$item}[$a] ne ''){
            push(@username,$group{$item}[$a])
        }
    }
}

#array containing all of the user that need to be added on system
my @usernames = ();
@usernames=uniq(@username,@add_machines);

my @special_usernames = uniq(@usernames,@special_users);
#hash of the user in passwd with username as reference
my %passwd = DataParsing('passwd',@special_usernames);

#hash of the password in shadow with username as reference
my %shadow = DataParsing('shadow',@special_usernames);

########################################################
########################################################

my @group_clean_data = CleanFiles('group',@group);
my @passwd_clean_data = CleanFiles('passwd',@special_usernames);

print Dumper(@passwd_clean_data);
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