#! /usr/bin/perl

use autodie qw{:all};
use open ":utf8";
use strict;

use DBI;

BEGIN { binmode STDOUT, ":utf8"; }

my $ROOT = "/mnt/dvd/archive";
my $DB = DBI->connect("dbi:Pg:host=roadstar", "", "",
		      { AutoCommit => 0,
			RaiseError => 1 });

my $st_query = $DB->prepare("SELECT s.name, d.set_id, d.disc, d.path
			     FROM dvd_disc AS d JOIN dvd_set AS s
			       ON d.set_id = s.id
			     WHERE d.disc_id IS NULL");
my $st_store = $DB->prepare("UPDATE dvd_disc SET disc_id = ?
			     WHERE set_id = ? AND disc = ?");

$st_query->execute;
DISC: for (;;) {
  my @r = $st_query->fetchrow_array; last DISC unless @r;
  my ($name, $set_id, $disc, $path) = @r;
  open my $ph, "-|", "dvd-id", "-I", "--", "$ROOT/$path";
  chomp (my $disc_id = <$ph>);
  close $ph;
  $st_store->execute($disc_id, $set_id, $disc);
  print ";; $name $disc: $disc_id\n";
}

$DB->commit; $DB->disconnect;