#! /usr/bin/perl
use strict;
use Math::BigFloat;
Math::BigFloat->precision(0);

sub GetINDirFiles {
        my @files;
        my ($path) = $_[0];

        opendir (my $directory, $path) or die $!;
        while(readdir $directory) 
            {
                push (@files, $_) unless (($_ =~ m/_ACK_/) || ($_ =~ m/^\./));
              
            }
         closedir $directory;
        return(@files);
}

sub GetOUTDirFiles {
       my @files;
       my ($path) = $_[0];

        opendir (my $directory, $path) or die $!;
        while(readdir $directory) 
            {
                unless ($_ =~ m/^\./)
                	{
                		 push (@files, $_) if $_ =~ m/_ACK.xml/;
                	}
             }
         closedir $directory;
        return(@files);
}

# Main
my @range;
my $inpath = "./IN/";
my $outpath = "./INACK/";
my $outsuffix = "_ACK.xml";
my $insuffix = ".xml";                #    Added by me 
my $timethreshold = 900;       # set time threshold in seconds (900 seconds equal 15 minutes)
my @delindex;
my @infiles = &GetINDirFiles($inpath);
my @outfiles = &GetOUTDirFiles($outpath);
my $index = 0; # index used to get string position in array
my $count = @infiles;

for (my $x = 0; $x < $count; $x+= 1)
	{
		my $name = $infiles[$x];
		$name =~ s/$insuffix//;
		
		for (@outfiles)
			{
				if ($_ =~ m/$name/)
					{	
						push (@range, $x) 
					}
			} 
	}
my $rangeCount = @range;
for (my $x = 0; $x < $count; $x+= 1)
	{ 
		splice(@infiles, $range[$x], 1);
	}

  # remove strings 
my $currenttime = time;      

 # get current time from system (epoch time)
foreach my $file (@infiles) 
	{
		 my $fileForTime = "$inpath"."$file";

		 my $mtime = ( stat $fileForTime )[9];
		 my $diff = ($currenttime - $mtime);
		     # ignore directories   # INSERT SUFFIX AGAIN ($insuffix)
             # get mtime from file (epoch time)   # INSERT SUFFIX AGAIN ($insuffix)     
		  
        if ($diff > $timethreshold) 
        	{  
               print "\n - file " . $file . " in " . $inpath . " directory was created at more than "  . Math::BigFloat->new($diff / 60) . " minutes.";    # INSERT SUFFIX AGAIN ($insuffix)
               
               # PUT THE ACTION THAT YOU WANT DO HERE!!!
      		} 
	}