irssi script to notify via Notification Center if I'm mentioned by nickname or receive a DM

notifier.pl

# Script for irssi to trigger macOs Notification Center
# Nathan Henrie (modifications, ©2016)
# Inspired by https://github.com/paddykontschak/irssi-notifier/blob/master/notifier.pl
#
# Currently notifies if mentioned by nickname or if PMed
# Only sends a static message to avoid arbitrary command execution by `system`
#
##  Installation:
#   Copy to `~/.irssi/scripts/` (and symlink to `~/.irssi/scripts/autorun` if desired)

use strict;
use Irssi;
use vars qw($VERSION %IRSSI);

$VERSION = "0.1.0";
%IRSSI = (
  authors     => "Nathan Henrie",
  contact     => "nate\@n8henrie.com",
  name        => "Notifier",
  description => "Script for irssi to trigger macOs Notification Center",
  license     => "MIT",
  url         => "https://n8henrie.com",
  changed     => "Fri 9 Dec 2016 10:02:28 MST"
);

sub notify {
  my ($title, $data) = @_;
    $data =~ s/[^[:alnum:] ]//g;
    system("osascript -e 'tell application \"Finder\" to display notification \"$data\" with title \"$title\"'");
    return 1
}

sub nick_notifier {
  my ($server, $data, $nick, $mask, $target) = @_;

    my $current_nick = $server->{nick};
    if($data =~ /$current_nick/) {
        notify("irssi", "You were mentioned");
    }
  Irssi::signal_continue($server, $data, $nick, $mask, $target);
}

sub pm_notifier {
  my ($server, $data, $nick, $mask, $target) = @_;

    notify("irssi", "You got a private message");
  Irssi::signal_continue($server, $data, $nick, $mask, $target);
}

Irssi::signal_add('message public', 'nick_notifier');
Irssi::signal_add('message private', 'pm_notifier');