#!/usr/bin/perl -w
use strict;

use LWP;
use Term::ReadKey;
use Getopt::Std;
use HTML::TokeParser;
use HTTP::Request::Common;

$| = 1;

use vars qw(%opts);
getopts('p:u:s:h',\%opts);
my ($user,$passwd,$help) = parse_args(\%opts);
USAGE() and exit unless $user and $passwd and not $help;

use constant URL => 'http://www.perlmonks.org/';
my $SEP = $opts{s} || "\t";

my $ua = LWP::UserAgent->new;
$ua->agent('personal_nodlet_extractor/1.0 (' . $ua->agent .')');

# log in and access your User Setting page in raw format
my $request = POST(URL,
   Content => [
      op          => 'login',
      user        => $user,
      passwd      => $passwd,
      node_id     => 1072,
      displaytype => 'raw',
   ] 
);

my $response = $ua->request($request);
die $response->message unless $response->is_success;

# pass the HTML content to TokeParser
my $content = $response->content;
my $parser  = HTML::TokeParser->new(\$content);

# 'fast forward' until we find "<b>Personal Nodelet</b>"
while ($parser->get_tag('b')) {
   last if 'Personal Nodelet' eq $parser->get_text;
}

# these are the [links|droids] we are looking for
while (my $tag = $parser->get_tag('a')) {
   if ($tag->[1]->{href} =~ /[^t]node_id=(\d+)/) {
      print $1 . $SEP . $parser->get_text . "\n";
   }
}

sub parse_args {
   my %opt = %{+shift};
   if (exists $opt{'p'} and not defined $opt{'p'} and defined $opt{'u'}) {
      print "Enter password: ";
      ReadMode 'noecho';
      chomp($opt{'p'} = ReadLine 0);
      ReadMode 'normal';
   }  
   return @opt{qw(u p h)};
}

sub USAGE { print "USAGE: $0 -u user [-s separator] -p password\n" }

=pod

=head1 NAME

extract_personal_nodelet.pl - LWP script

=head1 DESCRIPTION

This is a simple script that uses LWP and HTML::TokeParser to
access your User Settings page and extracts your Personal
Nodelet links.

=head1 SYNOPSIS

  for *nix:
    ./extract_personal_nodelet.pl -u uname -s : -p 
  for win32:
    perl extract_personal_nodelet.pl -u uname -s : -p

Invokes the script for the specified username and use a 
colon as the record separator. The script will prompt
you for your password if you do not specify it. The
contents would look something like this:

 24270:Permutations and combinations
 25730:Life in the land of OOP, and I'm confused.
 17890:Shift, Pop, Unshift and Push with Impunity!
 32005:Apache::MP3
 34786:Why I like functional programming

The default record seperator is a tab. I recommend you use it
since just about any character is fair game for a node title.

=cut