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File: rschat.class.php

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  Classes of V. Yanson  >  rschat  >  rschat.class.php  >  Download  
File: rschat.class.php
Role: Class source
Content type: text/plain
Description: class itself
Class: rschat
Manage multiple Web based chat rooms
Author: By
Last change:
Date: 8 years ago
Size: 4,246 bytes
 

Contents

Class file image Download
<?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;
        }
    }
}
 
?>