I have a movie collection catalogue with local links to folders and files for an easy access. Recently I reorganaized my entire hard disk space and I need to update the links and I'm trying to do that automatically with perl. I can export the data in a xml file and import it again. I can extract the new filepaths with the use of File::Find but I'm stuck with two problems. I have no idea how to connect the $title from the new filepath with the corresponding $title from the xml file. I'm dealing with such files for the first time and I don't know how to proceed with the replacement process. Here is what I've done till now

use strict; 
use warnings; 
use File::Basename;
use File::Find; 
use File::Spec;
use XML::Simple;
use Data::Dumper;



my $dir_target = 'somepath';


find(\&a, $dir_target);
sub a {
   /\.iso$/ or return;       

   my $fn = $File::Find::name;
   $fn =~ s/\//\\/g;
   $fn =~ /(.*\\)(.*)/;
   my $path = $1;
   my $filename = $2;

   my $title = (File::Spec->splitdir($fn))[2];
   $title =~ s/(.*?)\s\(\d+\)$/$1/;
   $title =~ s/~/:/;
   $title =~ s/`/?/;

   my $link_local = '<link><description>Folder</description><url>'.$path.'</url><urltype>Movie</urltype></link><link><description>'.$filename.'</description><url>'.$fn.'</url><urltype>Movie</urltype></link>' unless $title eq '';

   my $txt = 'somepath/log.txt'; 

   my $xml_in = XMLin('somepath/test.xml', ForceArray => 1, KeepRoot => 1); 

   my $xml_out = XMLout($xml_in, OutputFile => 'somepath/test_out.xml', KeepRoot=>1); 

   open F, ">>", $txt;
        print F $link_local."\n\n";
   close F;
}

And here is a snippet of the data I need to edit. If found imdb and dvdempire link - do not touch. if found local links replace, otherwise insert. I'm willing to complete the code myself but need some directions how to proceed further. Thanks.

<title>$title</title>
.......

<links>
<link>
<description>IMDB</description> 
<url>http://www.imdb.com/title/VARIABLE</url> 
<urltype>URL</urltype> 
</link>
<link>
<description>DVD Empire</description> 
<url>http://www.dvdempire.com/VARIABLE</url> 
<urltype>URL</urltype> 
</link>
<link>
<description>Folder</description>
<url>OLD_FOLDERPATH</url>
<urltype>Movie</urltype>
</link>
<link>
<description>OLD_FILENAME</description>
<url>OLD_FILENAMEPATH</url>
<urltype>Movie</urltype>
</link>
</links>