#!/usr/bin/perl
use strict;
use warnings;
use Digest::SHA qw(sha1_hex);
# Desactiva el buffering de salida para que Apache pueda obtener la respuesta inmediatamente
$| = 1;

while (<STDIN>) {
    chomp;
    my $input = $_;
    $input =~ /^\/image\/(.*)\/([a-z0-9-_]+)\.(png)$/;
    my $collection = $1;
    my $name = $2;
    my $extension = $3;

    my $sha1 = sha1_hex($name);
    my $first = substr($sha1, 0, 2);
    my $last = substr($sha1, 1, 2);
    my $newPath = "images/$collection/$first/$last/$name.$extension";

    if (-e "/usr/local/apache2/htdocs/$newPath") {
        print "/$newPath\n";
    } else {
        print "/$input\n";
    }
}