<?php
/**
 * Project:     smarty_ajax: AJAX-enabled Smarty plugins
 * File:        chat.php
 *
 * This software is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * @link http://kpumuk.info/ajax/smarty_ajax/
 * @copyright 2006 Dmytro Shteflyuk
 * @author Dmytro Shteflyuk <hide@address.com>
 * @package smarty_ajax
 * @version 0.1
 */

require_once('include/loader.php');

function get_messages() {
  $f = fopen('chat.txt', 'r');
  if (!$f) return;
  $chat = '';
  while ($s = fread($f, 4096)) $chat .= $s;
  fclose($f);
  echo nl2br($chat);
}

function add_message() {
  if (!isset($_POST['message']) || empty($_POST['message'])) return;

  if (!isset($_SESSION['user'])) {
    $_SESSION['user'] = 'Guest' . mt_rand();
  }

  $f = fopen('chat.txt', 'r');
  if (!$f) return;
  $chat = '';
  while ($s = fread($f, 4096)) $chat .= $s;
  fclose($f);

  $chat = $_SESSION['user'] . '&gt; ' . htmlspecialchars($_POST['message']) . "\n" . $chat;
  $chat_arr = array_slice(explode("\n", $chat), 0, 100);
  $chat = implode("\n", $chat_arr);

  $f = fopen('chat.txt', 'w');
  fwrite($f, $chat);
  fclose($f);
}

ajax_register('get_messages', 'add_message');
ajax_process_call();

$t->assign('title', 'AJAX chat');
$t->assign('page_template', 'chat');
$t->display('page.tpl');

?>