#!/usr/bin/perl

use strict;
use warnings;
use threads;
use threads::shared;
use Linux::Inotify2;

my @jobstack :shared ;   # shared array for filenames 

# spawn thread sub
# start inotify in separate thread
my $thr1 = threads->create(\&jobinotifydetect);  
$thr1->detach();

#main
while (1) {
sleep 1;
	{
	# here comes main > for now remove every second a file out of stack 
	lock (@jobstack);
	# I can't splice shared arrays so I copy it onto a nonshared one > later I need splice to pull out specific files 1st
	# now it's just a pop replacement
	my @temp=@jobstack;
	my $t = scalar (@temp);
	splice (@temp,$t-1,1) if ($t );
	@jobstack=@temp;
	}
}


sub jobinotifydetect {
my $smbroot = "/media/lrfp/";
my $sharedfolder = "jobs/";
my $path = $smbroot . $sharedfolder ;
my $jobinotify;
my $file;
my $count;
my $tt;
$jobinotify = new Linux::Inotify2 or die "unable to create new inotify object: $!";
  # add watcher
   $jobinotify->watch ("$path", IN_MOVED_TO | IN_MODIFY | IN_CREATE, sub {
    my $e = shift;
	if ( $e->IN_MOVED_TO || $e->IN_MODIFY || $e->IN_CREATE ) {
	# wait for file locks to be removed > when data is still written by server
    my $file = $e->name;
	my $t=$e->fullname;
	my $exec = `smbstatus | grep "EXCLUSIVE" | grep "$sharedfolder" | grep "$file"`;
	if (!($exec)) {
	# check if filesize <> 0,don't if file has zero length
	if ( -s $t ) {
	{
	# lock @jobstack while I push filename onto it 
	lock (@jobstack);
	# don't push onto stack if already exist
	if (!( grep( /^$file/, @jobstack ) ) ){
	push (@jobstack,$file);
	$tt=scalar (@jobstack);
	print "$count \t $file \t $tt \n";
	$count = 0;
	}}}
	} else {
	# count how much times routine gets called just out of curiosity, I'll remove this later
	$count +=1 ;
	}
	}
	
});
1 while $jobinotify->poll;
}