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

use File::Find;
use File::stat;

my $dir = shift;
my %result;

find ( {'wanted' => sub {
            my $file = $File::Find::name;
            my ($n, $fn) = (getpwuid (stat($file)-> uid))[0, 6];
            if (-f && (/^[^.]/) ) {
                if( my ($pre, $num, $suff) = $file =~ /(.*)\.([0-9]+)\.(.*)/ ) {
                    push @{ $result{$pre}{$suff}{"$n:$fn"} }, $num;
                }
            }
        },
       },
       $dir);

for my $pre (keys %result) {
    for my $suff (keys %{ $result{$pre} }) {
        for my $user (keys %{ $result{$pre}{$suff} }) {
            my @nums = sort { $a <=> $b } @{ $result{$pre}{$suff}{$user} };

            my $first = shift @nums;
            my ($from, $to, @ranges) = ($first, $first);

            for (@nums) {
                if ($_ == $to + 1) {
                    $to = $_;
                } else {
                    push @ranges, [$from, $to];
                    ($from, $to) = ($_, $_);
                }
            }
            push @ranges, [$from, $to];

            for my $r (@ranges) {
                print "$pre." 
                      . ($r->[0] == $r->[1] ? $r->[0]
                                            : "[$r->[0]-$r->[1]]")
                      . ".$suff:$user\n";
            }
        }
    }
}