# Note - don't use this code. See link above.
package PerlMonksChat;

use LWP::UserAgent;
use HTTP::Request;
use HTML::Entities;

sub new {
  my $class=shift;
  my $url=shift||'http://www.perlmonks.org/index.pl?node_id=2518';
  my $self={};
  $self->{url}=$url;
  $self->{ua}=new LWP::UserAgent;
  $self->{req}=new HTTP::Request('GET', $url);
  $self->{cache}=[];
  bless $self, $class;
  return $self;
}

sub getalllines {
  my $self=shift;
  $ua=$self->{ua};
  $req=$self->{req};
#  print "(* grabbing *)\n";
  my $response=$ua->request($req);

  if ($response->is_success) {
    my $c=$response->content;
    #  print $c;
    if ($c =~ /<td.*?Chatterbox.*?<input[^>]*?>(.*?)<input/msi) {
      my $chatline=$1;
      $chatline=~s/[\n\r]//g;
      # Split in lines and remove html tags
      my @chatlines=grep { $_ }
        map { s/<[^>]+?>//g; decode_entities($_); $_ }
          split(/\s*<br>\s*/, $chatline);
      return @chatlines;
    }
  }
  else {
    return ("error");
  }
}

sub getnewlines {
  my $self=shift;
  my $cache=$self->{cache};
  my @allines=$self->getalllines();
  my @newcache;
  # Don't use a regular cache, instead go back through them until we
  # find the first one that is in the cache.
  foreach (reverse @allines) {
    last if ($cache->[0] && $_ eq $cache->[0]);
    push @newcache, $_;
  }
  # Add the new lines to the cache
  unshift @$cache, @newcache;
  # Trim the cache to the last 50 lines
  splice(@$cache,50);
  return reverse @newcache;
}

1;
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