<?php
// error messages (just so its easy to change or translate)
define('RS_WRONG_USERNAME_OR_PASSWORD', 'Wrong username or password');
define('RS_LOGIN_BEFORE_POSTING', 'You need to login before posting');
define('RS_NO_ROOMS', 'No chat rooms are available');
define('RS_NO_ROOM', 'This room is not available');
class rschat
{
private $db; // database object. class type is mysql
protected $user_conf = array(); // user configuration. fetched after authentication
private $logged_in = false; // are we logged in or not?
protected $rooms = array(); // room list
// constructor. (mysql) $db
public function __construct(mysql $db)
{
$this->db = $db;
}
// authentication function. (string) $user, (string) $pass
public function login($user, $pass)
{
// log user out in case already logged in
$this->user_conf = array();
$this->logged_in = false;
// try to authenticate
$auth = $this->db->query("select * from users where username='" . mysql_real_escape_string($user) . "' and password=PASSWORD('" . mysql_real_escape_string($pass) . "') limit 1");
if (count($auth) > 0)
{ // good. username and password are correct
// set variables
$this->user_conf['username'] = $auth[0]['username'];
$this->user_conf['id'] = $auth[0]['id'];
$this->user_conf['msg_format'] = array // message formatting
(
'color' => $auth[0]['msg_color'],
'italic' => $auth[0]['msg_italic'] === 'y' ? true : false,
'bold' => $auth[0]['msg_bold'] === 'y' ? true : false
);
$this->logged_in = true;
return true;
} else { // bad. something is incorrect in user input
$this->logged_in = false;
return RS_WRONG_USERNAME_OR_PASSWORD;
}
}
// get rooms list. if $force is set to true then we will grab it from database
// even if we did that already. (bool) $force
public function get_rooms($force = false)
{
if (count($this->rooms) < 1 || $force)
{
$rooms = $this->db->query("select * from rooms order by name");
if (count($rooms) > 0)
{
$this->rooms = $rooms;
return $rooms;
} else {
return RS_NO_ROOMS;
}
}
}
// check if room exists. (int) $room
public function check_room($room)
{
$rooms = $this->get_rooms(true);
if (is_array($rooms) && count($rooms) > 0)
{
foreach($rooms as $n => $v)
{
if ($room === $v['id'])
{
return true;
}
}
return RS_NO_ROOM;
} else {
return RS_NO_ROOMS;
}
}
// this function sends message to chat room. (int) $room, (string) $message
public function say($room, $message)
{
// are we logged in?
if ($this->logged_in)
{
// check if room actually exists
$room_exists = $this->check_room($room);
if ($room_exists === true)
{
// format and post message
$bold_start = $this->user_conf['msg_format']['bold'] ? '<strong>' : '';
$bold_end = $this->user_conf['msg_format']['bold'] ? '</strong>' : '';
$italic_start = $this->user_conf['msg_format']['italic'] ? '<em>' : '';
$italic_end = $this->user_conf['msg_format']['italic'] ? '</em>' : '';
$message = '<font color="' . $this->user_conf['msg_format']['color'] . '">' . $bold_start . $italic_start . $message . $italic_end . $bold_end . '</font>';
$this->db->query("insert into messages (room, user, message) values (" . (int) $room . ", " . (int) $this->user_conf['id'] . ", '" . mysql_real_escape_string($message) . "')");
} else {
return $room_exists;
}
} else {
return RS_LOGIN_BEFORE_POSTING;
}
}
// get messages from specific room. (int) $room, (int) $last_message_id
public function get_messages($room, $last_message_id)
{
$room_exists = $this->check_room($room);
if ($room_exists === true)
{
$messages = $this->db->query("select m.id, m.message, r.name, u.username from messages as m, users as u, rooms as r where m.room=r.id and m.user=u.id and m.id>" . (int) $last_message_id . " and m.room=" . (int) $room . " order by m.id");
return array
(
'last_message_id' => $messages[count($messages) - 1]['id'],
'messages' => $messages
);
} else {
return $room_exists;
}
}
}
?>
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