check for Yosemite hotels

hotels.pl

use strict;
use warnings;

use HTML::TreeBuilder::XPath;
use LWP::Simple qw(get);
use Net::SMTP;
use URI;

my $uri = URI->new('https://gc.synxis.com/rez.aspx');
$uri->query_form(
    Chain  => 398,
    start  => 'availresults',
    wsi    => '',
    arrive => '6/19/2013',
    depart => '6/23/2013',
    adult  => 2, 
    child  => 0, 
    Hotel  => 400,
    rcp    => '',
);

while (1) {
    my $c     = get($uri->as_string);
    my $tree  = HTML::TreeBuilder::XPath->new_from_content($c);
    my $empty = $tree->exists(
        './/div[@class=~/\bAvailResults\b/]
          //span[@class=~/\bNoAvailMsg\b/ and .=~/\bThere are no available rooms\b/]'
    ); 

    print $empty ? "Found no hotels\n\n" : "Found hotel(s) at " . $uri->as_string . "\n\n";
    unless ($empty) {
        my $smtp = Net::SMTP->new('smtp.foo.com');
        $smtp->mail('hotelbot@dontreply.com');
        $smtp->to(qw( foo@gmail.com ));
        $smtp->data();
        $smtp->datasend(sprintf(<<END_MSG, $uri->as_string));

Hello,

I think I might have found an available Housekeeping Camp:

%s

END_MSG

        $smtp->dataend();
        $smtp->quit();
    }  
    sleep(1200);
}