#!/usr/bin/perl
use strict;
use warnings;

# History:
# conray  - 19.02.2010 : 19:31 UTC - initial version with ping (-ping)
# betterworld - 19.02.2010 : 19:44 UTC - minor changes
# esskar  - 19.02.2010 : 20:27 UTC - changes on ping, and dump myself command (-dump)
# topeg  - 19.02.2010 : 00:02 UTC - addded mirror
# Kalle - 01.03.2010 - added technology assimilation automation
# conray - 02.02.2010 21:07 - added Helpfunktion (-help) and changes on Ping-Parameter
# conray - 03.02.2010 19:28 - added Password-Generator (-pwgen)


use FindBin;
use Net::Ping;

#EierlegendeWollMilchSau.pl

my $cmd = lc shift @ARGV;
if ($cmd eq '-ping' ) #ping
{
  my $ip = shift @ARGV
    or die "No ip.";

  my @r = split(/\./, $ip);
  my $till = shift(@ARGV) || $r[3];

  my $until = $till + 1;
  while ($r[3] < $until )
  {
    $ip = join '.', @r;
    my $ping = Net::Ping->new('icmp', 1, 64 );
    print "$ip " . ($ping->ping($ip) ? 'online' : 'offline') . "\n";
    $r[3]++;
  }
}
elsif($cmd eq '-dump')
{
  my $path = "$FindBin::Bin/$FindBin::Script";
  open(my $myself, "< $path") or die "Unable to open myself ($path): $!";
  while(<$myself>) { print $_; }
  close $myself;
}
elsif( $cmd eq '-devil' )
  {
     print "So long, and thanks for all the fish.\n";
     unlink $0 or die "Will not stop :'-(\n";
  }
elsif($cmd eq '-mirror')
{
  my $fh=\*STDIN;
  my $file=shift;
  open($fh,'<',$file) || die("ERROR open $file ($!)") if($file);
  chomp($_) && print reverse($_)."\n" while(<$fh>);
  close($fh);
}
elsif($cmd eq '-assimilate')
{
  my $newtechsource=shift @ARGV;
  my $borgtechnology;
  my $assimilationspace;
  my $newtechnology;
  my ($newcmdname)=split(/\./,$newtechsource,0);

  use File::Basename;
  my ($borgbase,$borgpath)=fileparse($0);
  my $newborgtechnology="${borgpath}Neue$borgbase";
  if (open($borgtechnology,'<',$0)) {
    if (open($assimilationspace,'>',$newborgtechnology)) {
      if (open($newtechnology,'<',$newtechsource)) {
        while(<$borgtechnology>) {
          if (/\\t-assimilate newparam.pl\\t/) {
            print $assimilationspace $_;
            print $assimilationspace "  print \"\\t-$newcmdname\\t\\t assimilated weird stuff\\n\";\n";
          }
          elsif (/^# elsif\(MORE\) \{ \}/) {
             my $thisline=$_;
             print "Assimiliere neue Technologie...\n";
             print $assimilationspace "elsif(\$cmd eq \'-$newcmdname\')\n\{\n";
             while(<$newtechnology>) {
               next if (/^#!|^use strict;|^use warnings;/);
               print $assimilationspace $_;
             }
             close($newtechnology);
             print $assimilationspace "\}\n$thisline";
          }
          else {
            print $assimilationspace $_;
          }
        }
        close($borgtechnology);
        if (close($assimilationspace)) {
          print "Widerstand war zwecklos!\nNeue Technologie einsetzbar: Neue$borgbase -$newcmdname\n";
        }
        else {
          print "Aktivierungssequenz ungültig. Assimilation abgebrochen.\n";
        }
      }
      else {
        print "Neue Technologie kann nicht assimiliert werden. Abbruch der Assimilation\n";
      }
    }
    else {
      print "Fluktuation im temporären Raum-/Zeitgefüge. Abbruch der Assimilation.\n";
    }
  }
  else {
    print "Wo sind wir ? Es ist so....leise. Bring uns nach Hause!\n";
  }
}

elsif ($cmd eq '-pwgen')
{
  print "How much positions your password should have?\n";
  print "Note: Secure passwords have 10 positions as minimum \n";
  my $input=<STDIN>;
  chomp $input;
  my @bletters = ("A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z");
  my @sletters = ("a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z");
  my @numbers = ("1", "2", "3", "4", "5", "6", "7", "8", "9", "0");
  my @special = ("!", "\.", "\$", "\%", "\&", "?", "\/", "\\", "\,", "-", "_", "\#", "\*", ":", "(", ")", "=", "+", "<", "§", "[", "]", "\;");

  our $pw;
  while (length($pw) != $input) {
     my $n1 = int(rand(26));
     my $n2 = int(rand(26));
     my $n3 = int(rand(10));
     my $n4 = int(rand(23));
     my $z = int(rand(4));
     if ($z == 0) { 
        $pw = $pw . $bletters[$n1]; }
     elsif ($z == 1) {
        $pw = $pw . $sletters[$n2]; }
     elsif ($z == 2) {
        $pw = $pw . $numbers[$n3]; }
     elsif ($z == 3) {
        $pw = $pw . $special[$n4]; }
     else {
        print "There is bug";
        exit; }
     }
  print "The generated Password is: $pw \n";
}
elsif($cmd eq '-help')
{
  print "usage: EierlegendeWollMilchSau.pl <parameters>\n\n";
  print "parameters:\n";
  print "\t-ping <ip> [range]\t\ttrys to ping an ip or an range of ip addresses.\n";
  print "\t-dump\t\t\tdumps itself to STDOUT\n";
  print "\t-devil\t\t\tDon't try that\n";
  print "\t-mirror [file]\t\t mirror file or STDIN\n";
  print "\t-assimilate newparam.pl\t assimilate more perl code into this script\n"; #<-- don't touch this
  print "\t-pwgen generates an (secure) password\n";
  print "\n";
}
# elsif(MORE) { }    <-- don't touch this
else
{
    print "Type ./EierlegendeMilchSau.pl -help for more informations \n";
  exit 0;
}

__END__