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

use Net::AIM;

my $aim = Net::AIM->new();

$aim->newconn(
  Screenname => "TestAIMBot",
  Password   => "TestAIMBot's Password",
);
my $conn = $aim->getconn() or die "Can't connect to AIM server.\n";

$conn->set_handler('im_in', \&on_im);

$aim->start;


sub on_im {
  my ($self, $evt, $from, $to) = @_;
  my ($nick, $auto, $msg) = @{$evt->args()};

  # Normalize removes non-alpha-numeric characters.
  # Note that if you don't remove non-word characters,
  # opening a file based on the username becomes a
  # security risk.  Be careful.
  my $filename = $self->normalize($from) . '.emo';

  my $count = readcount($filename);

  # will match 'sorry', 'srry', 'sry', and 'sory'
  # Note that it's not anchored to the start of
  # the string, as the word 'sorry' may appear
  # anywhere in the message.  Change if desired.
  if($msg =~ /so?r?ry/) {
    # Increase and save the count.
    writecount($filename, ++$count);
  }

  $self->send_im($from, "You were sorry $count times.");
}

sub readcount {
  my $filename = shift;

  # If the file doesn't already exist, we will
  # simply return a count of 0 and let writecount()
  # create the file later on.
  open my $fh, "< $filename" or return 0;
  my $count = <$fh>;
  close $fh;

  return $count;
}

sub writecount {
  my $filename = shift;
  my $count    = shift;

  # If the file doesn't exist, this will create it.
  open my $fh, "> $filename" or die "Can't open $filename for write: $!\n";
  print $fh $count;
  close $fh;
}